Faculty Profiles - ANDO YUTA

Information

写真a

ANDO YUTA

Organization

Faculty of Science Department of Earth and Planetary Sciences Academic Researcher

Contact information

Tel

0928024231

Homepage

https://sites.google.com/view/yuta-ando

External link

Research Areas

Natural Science / Atmospheric and hydrospheric sciences

Degree

Doctor of Philosophy (Mie Univesity)

Research History

Kyushu University Faculty of Sciences Department of Earth and Planetary Sciences Researcher

2023.4 - Present

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Country：Japan

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Niigata University Graduate School of Science and Technology Post-doctoral Fellow

2022.4 - 2022.9

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Niigata University Faculty of Science Project Assistant Professor

2020.10 - 2022.3

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Country：Japan

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Suzuka National College of Technology Part-time Teacher

2016.4 - Present

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Country：Japan

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2022年4月 - 2022年9月：新潟大学大学院自然科学研究科博士研究員 2020年10月 - 2022年3月：新潟大学理学部特任助教 2020年5月 - 2021年9月：三重大学大学院生物資源学研究科研究員 2016年4月 - ：鈴鹿工業高等専門学校非常勤講師 2014年8月 - 2016年3月：国立極地研究所技術補佐員

Papers

Dominant contribution of Arctic sea ice cover to the bimodally interannual variation of the polar night jet in late November Reviewed

Yuta Ando, Takashi Mochizuki

Journal of Oceanography 81 ( 3 ) 217 - 234 2025.6 （ ISSN:0916-8370 eISSN:1573-868X ）

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Oceanography

The polar night jet (PNJ), characterized by strong zonal-mean zonal winds at 60–80° N and 50 hPa, shows interannual variability that is distinctively observed in late November. The autumnal acceleration tendency of the PNJ exhibits the alternative of monotonous acceleration and temporary deacceleration marked by a “short break” and consequently represents bimodal fluctuations. Statistical analyses using reanalysis and objective analysis datasets in this study reveal that the reduction of Arctic sea ice concentration (SIC) predominantly contributes to the PNJ short break, rather than other potential factors such as the quasi-biennial oscillation (QBO) and the El Niño-Southern Oscillation (ENSO) variability. The PNJ short break is usually accompanied by the upward propagation of Rossby waves from the troposphere to the stratosphere over Siberia. When the Arctic SIC is lower than climatology, particularly in the Barents–Kara Sea, the increased heat flux at the sea surface causes deceleration events inherent to late November. In contrast, the intensity of the submonthly-scale PNJ deceleration and acceleration is affected little by the phase of the QBO, while the phase of the QBO is thought to contribute to the seasonal means of the PNJ. While ENSO variability can also give favorable conditions for the deceleration of the zonal-mean westerly winds, the upward wave propagation is observed mainly over the North Atlantic and Europe rather than over Siberia.

DOI： 10.1007/s10872-025-00749-9

Web of Science

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Detection of a climatological short break in the polar night jet in early winter and its relation to cooling over Siberia Reviewed International journal

Yuta Ando, Koji Yamazaki, Yoshihiro Tachibana, Masayo Ogi, Jinro Ukita

ATMOSPHERIC CHEMISTRY AND PHYSICS 18 ( 17 ) 12639 - 12661 2018.8

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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We found the climatological strong stratospheric westerly circumpolar wind stops increasing temporarily during November, when the upward propagation of large-scale atmospheric waves from the troposphere increases. The propagation of atmospheric waves, which is strongest over Siberia, is related to strengthening of the low pressure. Longitudinally asymmetric forcing by land–sea heating contrasts caused by their different heat capacities might cause the strengthening of the low pressure.

DOI： 10.5194/acp-18-12639-2018

Other Link： https://doi.org/10.5194/acp-18-12639-2018
Abnormal Winter Weather in Japan during 2012 Controlled by Large-Scale Atmospheric and Small-Scale Oceanic Phenomena Reviewed International journal

Yuta Ando, Masayo Ogi, Yoshihiro Tachibana

MONTHLY WEATHER REVIEW 143 ( 1 ) 54 - 63 2015.1

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

Negative Arctic Oscillation (AO) and western Pacific (WP) indices persisted from October to December 2012 in the Northern Hemisphere. For the first time, the monthly AO and WP were both negative for three consecutive months since records have been kept. Although in general negative AO and WP phases cause Siberia, East Asia, and Japan to be abnormally cold, Japan was relatively warm in October 2012 even though both the AO and WP were strongly negative. The temperature of the Sea of Japan reached a record-breaking high in October 2012, and it was found that heating by these very warm waters, despite the small size of the Sea of Japan, overwhelmed the cooling effect of the strongly negative AO and WP in October. Linear regression analyses showed that Japan tends to be warm in years when the Sea of Japan is warm. Consequently, the temperature over Japan is controlled by interannual variations of small-scale oceanic phenomena as well as by large-scale atmospheric patterns. Previous studies have ignored such small-scale oceanic influences on island temperatures.

DOI： 10.1175/MWR-D-14-00032.1

Other Link： https://doi.org/10.1175/MWR-D-14-00032.1
Decadal Modulation of Summertime Northwestern Pacific Subtropical High Linked to Indian Ocean Basin Warming Reviewed International journal

Takashi Mochizuki, Yuta Ando

Climate 13 ( 6 ) 106 - 106 2025.5 （ eISSN:2225-1154 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI AG

The Northwestern Pacific Subtropical High (NPSH), usually enhanced by the basin-scale warming of the Indian Ocean (IOBW), plays a major role in controlling the summertime East Asian climate. To assess factors contributing to the decadal modulation of the NPSH and IOBW relationship in recent years, we conducted sensitivity experiments using an atmospheric general circulation model. We particularly focused on decadal-scale differences between the periods of 1982–2001 and 2002–2021, with the contribution of the climatological sea surface temperature (SST) as the background, in combination with the tropical Pacific SST anomaly in relation to the rapid or slow decay of the El Niño Southern Oscillation (ENSO). The results indicate that the IOBW-related SST anomalies in the Indian and tropical Pacific Oceans—which, overall, represent the well-known characteristics of the so-called Indo-western Pacific Ocean Capacitor effects—cooperatively enhanced the NPSH in the earlier period (1982–2001). On the other hand, the suppressed and westward-shifted SST anomalies in the tropical Pacific Ocean and the resultant changes in the diabatic heating of cumulus convection suppressed the NPSH enhancement in recent years (2002–2021). These results indicate that the modulation in the NPSH responses linked to the IOBW is primarily due to the so-called ENSO diversity rather than climatology.

DOI： 10.3390/cli13060106

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Spatial structure of rain pool observed on the Kuroshio and Baiu fronts in the East China Sea Reviewed

Takikawa Tetsutaro, Yoshihiro Tachibana, Hirohiko Nakamura, Ayako Nishina, Atsuyoshi Manda, Hatsumi Nishikawa, Satoru Kasuga, Yuta Ando, Teruyuki Kato

Journal of Oceanography 2025.5 （ ISSN:0916-8370 eISSN:1573-868X ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Oceanography

<jats:title>Abstract</jats:title>
<jats:p>Spatial three-dimensional structure of low-salinity water on the Baiu and Kuroshio fronts is shown using intensive observation results by three ships in the East China Sea. The surface low-salinity pool along the Kuroshio front was formed by rainfall of the Baiu front during the observations. The horizontal distribution of the low-salinity pool with about 130 km long, 40 km wide, and 9–12 m thick along the Kuroshio front is consistent with the precipitation map of the weather radar. The relationship between the surface low-salinity water and precipitation was also quantitatively explained by the conservation of volume. Barrier layer below the surface rain pool had a thickness from several meters to a maximum of 46 m. Subsurface (~ 20-m depth) low-salinity patches were observed below the barrier layer. Based on the order of vertical flow, it is considered that the low-salinity patches moved from the sea surface to the subsurface layer in about 1 day, and their origin is presumed to be rainfall several days earlier. Below the low-salinity patches, we detected temperature inversion layer with warm and saline water, which is thought to have an effect similar to the barrier layer.</jats:p>

DOI： 10.1007/s10872-025-00759-7

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Consideration of whether a climatic regime shift has prevented the occurrence of a cold summer in northeast Eurasia since 2010 Reviewed International journal

Miku Amano, Yoshihiro Tachibana, Yuta Ando

Journal of Climate 36 ( 23 ) 8059 - 8071 2023.8

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Language：English Publishing type：Research paper (scientific journal) Publisher：American Meteorological Society

Does a warming world, where extremely hot summers are becoming more common, mean that cold summers will never again occur? It is crucial to know whether extremely cold summers are still possible, as such knowledge will significantly impact decisions regarding the further adaptation of crops to cold summers. Japan, which has suffered from many extremely cold summers, has managed past agricultural disruptions with emergency rice imports. In this paper, we show that a climate regime shift associated with the positive phase shift of the Arctic Oscillation occurred in 2010 in northeast Eurasia, making the occurrence of extremely cold summers highly unlikely as long as this new regime persists. In fact, Japan has not experienced a cold summer since 2010, while extremely hot summers have been frequent. Since 2010, a double jet structure with subtropical and polar jets has strengthened, and the polar jet has meandered further north of Japan, resulting in an upper tropospheric anticyclone. This anticyclone, which extends downwards and tilts southwards, reaches southern Japan and prevents cold advection of oceanic air over the cold Oyashio Current. The Okhotsk High, known as the leading cause of cold summers, has occurred frequently in recent years; however, cold summers have not occurred due to the tilting anticyclone. The recent warming of the Oyashio Current weakens cold advection. The Pacific-Japan pattern, known as a remote tropical influence, has been weakened. A better understanding of the regime shift will help us understand the tilting anticyclone and the associated extreme summers in northeast Eurasia.

DOI： 10.1175/jcli-d-23-0191.1

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Other Link： https://journals.ametsoc.org/downloadpdf/journals/clim/aop/JCLI-D-23-0191.1/JCLI-D-23-0191.1.xml
Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel Reviewed International journal

Tomoe Nakanishi, Yoshihiro Tachibana, Yuta Ando

Climate Dynamics 57 2287 - 2299 2021.10

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Language：English Publishing type：Research paper (scientific journal)

The Sahel region, located between the tropical rainforests of Africa and the Sahara Desert, has rainfall that varies widely from year to year, associated with extremely deep convection. This deep convection, strongly heated by water vapor condensation, suggests the possibility of exerting a remote influence on mid- and high-latitude climate similar to the well-known influences of tropical oceanic convection on global climate. Here we investigate the possibility that deep convection over the Sahel initiates a semi-circumglobal teleconnection extending to eastern Eurasia. Statistical analysis and numerical experiments support the possible existence of this teleconnection at an interannual time scale. We propose that the anomalous heat source due to deep convection over the Sahel in the late monsoon season influences meandering of the mid-latitude jet stream over Europe through the combination of a Matsuno-Gill response and advection of absolute vorticity. This subtropical jet meander may in turn drive an eastward propagation of a Rossby wave across Eurasia as far as East Asia. Because deep convection over other subtropical land areas may exert a similar remote influence upon extratropical extreme weather, further studies of the influence of overland convection may provide us with an expanded comprehension of teleconnections.

DOI： 10.1007/s00382-021-05804-x

Other Link： https://doi.org/10.1007/s00382-021-05804-x
Warm hole in Pacific Arctic sea ice cover forced mid-latitude Northern Hemisphere cooling during winter 2017–18 Reviewed International journal

Yoshihiro Tachibana, Kensuke K. Komatsu, Vladimir A. Alexeev, Lei Cai, Yuta Ando

Scientific Reports 9 ( 1 ) 5567 2019.4

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Language：English Publishing type：Research paper (scientific journal)

Warm hole in Pacific Arctic sea ice cover forced mid-latitude Northern Hemisphere cooling during winter 2017–18
In North America and Asia, extreme cold weather characterized the winter of 2017–18. At the same time, the Pacific, the Bering Sea, and the Atlantic Arctic regions experienced anomalously low sea ice extent in the early winter. The jet stream dividing cold Arctic air from warm air deviated from normal zonal patterns northward into the ice-free areas north of the Bering Strait. Large southward jet stream pathways formed over Asia and America, allowing cold air to spread into Asia and the southern areas of North America. We hypothesise that the late autumn Bering Strait sea-ice anomaly and Pacific atmospheric rivers were partially responsible for the cold winter. We used data analyses and numerical experiments to test this hypothesis. We propose a positive feedback mechanism between the sea ice anomaly and atmospheric river activity, with anomalous south winds toward the sea ice anomaly potentially leading to more warm water injected by the wind-driven current through the Bering Strait. Our findings suggest that Poleward propagation of the atmospheric rivers made upper air warm, leading to their upgliding, which further heated the overlying air, causing poleward jet meanders. As a part of this response the jet stream meandered southward over Asia and North America, resulting in cold intrusions. We speculate that the positive feedback mechanism observed during the 2017–18 winter could recur in future years when the sea-ice reduction in the Pacific Arctic interacts with enhanced atmospheric river activity.

DOI： 10.1038/s41598-019-41682-4

Other Link： https://doi.org/10.1038/s41598-019-41682-4
Synchrony of trend shifts in Sahel boreal summer rainfall and global oceanic evaporation, 1950-2012 Reviewed International journal

Alima Diawara, Yoshihiro Tachibana, Kazuhiro Oshima, Hatsumi Nishikawa, Yuta Ando

HYDROLOGY AND EARTH SYSTEM SCIENCES 20 ( 9 ) 3789 - 3798 2016.9

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Language：English Publishing type：Research paper (scientific journal)

Between 1950 and 2012, boreal summer (rainy season) rainfall in the Sahel changed from a multi-decadal decreasing trend to an increasing trend (positive trend shift) in the mid-1980s. We found that this trend shift was synchronous with similar trend shifts in global oceanic evaporation and in land precipitation on all continents except the Americas. The trend shift in oceanic evaporation occurred mainly in the Southern Hemisphere (SH) and the subtropical oceans of the Northern Hemisphere (NH). Because increased oceanic evaporation strengthens the atmospheric moisture transport toward land areas, the synchrony of oceanic evaporation and land precipitation is reasonable. Surface scalar winds over the SH oceans also displayed a positive trend shift. Sea surface temperature (SST) displayed a trend shift in the mid-1980s that was negative (increasing, then decreasing) in the SH and positive in the NH. Although SST had opposite trend shifts in both hemispheres, the trend shift in evaporation was positive in both hemispheres. We infer that because strong winds promote evaporative cooling, the trend shift in SH winds strengthened the trend shifts in both SST and evaporation in the SH. Because high SST promotes evaporation, the trend shift in NH SST strengthened the NH trend shift in evaporation. Thus differing oceanic roles in the SH and NH generated the positive trend shift in evaporation; however, the details of moisture transport toward the Sahel are still unclear, or perhaps there is no single determining influence.

DOI： 10.5194/hess-20-3789-2016

Other Link： https://doi.org/10.5194/hess-20-3789-2016
実用的条件下での渦相関法とバルク法による海面乱流フラックスの比較 Reviewed

安藤雄太, 立花義裕, 根田昌典, 内田誠, 前川陽一, 中村亨, 仲里慧子

海と空 89 ( 1 ) 1 - 8 2013.7

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Language：Japanese Publishing type：Research paper (scientific journal)

Comparison between the air-sea turbulent flux according to the Eddy Covariance and the Bulk Method under the practical conditions
The air-sea turbulent flux is an important factor for understanding the physical processes of the air-sea interaction. In this study, we first used the observation data of Eddy Covariance (EC) equipments installed on a training ship of Mie University “SEISUI MARU”, the unique vessel in Japan having those equipments. The purpose of the study is to explain the cause of difference between the turbulent sensible heat flux (SHF) calculated by the EC and by the bulk method (COARE3.0) under the practical conditions. The results show that the variations of both of SHF calculated by the EC and by the bulk method are similar, however the conventional bulk method tends to generate a larger flux value compared to the EC. We consider that the cause of the difference could be the wind velocity or the sea surface temperature (SST) - the surface air temperature (SAT). Therefore, we could suggest that we can decrease the difference between SHF calculated by EC and by the bulk method in improving the bulk coefficient which depend on the wind velocity or SST - SAT.

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Presentations

初冬における極夜ジェットのバイモーダルな年々変動に対する北極海氷の役割

安藤雄太, 望月崇

日本気象学会2024年度秋季大会 2024.11 日本気象学会

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Event date： 2024.11

Language：Japanese Presentation type：Poster presentation

Venue：つくば市 Country：Japan

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A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana

Seventh International Symposium on Arctic Research (ISAR-7) 2023.3

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Event date： 2023.3

Language：English

Venue：Tachikawa Country：Japan
A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana

Seventh International Symposium on Arctic Research (ISAR-7) 2023.3 Japan Consortium for Arctic Environmental Research, National Institute of Polar Research

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Event date： 2023.3

Language：English Presentation type：Poster presentation

Venue：Tachikawa Country：Japan

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2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

異常気象研究会2022，第10回観測システム・予測可能性研究連絡会「大気海洋結合系の変動・変化と広域・持続的な異常天候」 2022.12

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Event date： 2022.12

Language：Japanese

Venue：宇治市 Country：Japan
2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

異常気象研究会2022，第10回観測システム・予測可能性研究連絡会「大気海洋結合系の変動・変化と広域・持続的な異常天候」 2022.12

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Event date： 2022.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：宇治市 Country：Japan

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2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

日本気象学会2022年度秋季大会 2022.10

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Event date： 2022.10

Language：Japanese

Venue：札幌市 Country：Japan
2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

日本気象学会2022年度秋季大会 2022.10 日本気象学会

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Event date： 2022.10

Language：Japanese Presentation type：Poster presentation

Venue：札幌市 Country：Japan

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2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

雪氷研究大会2022 2022.10

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Event date： 2022.10

Language：Japanese

Venue：札幌市 Country：Japan
2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

雪氷研究大会2022 2022.10 日本雪氷学会

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Event date： 2022.10

Language：Japanese Presentation type：Oral presentation (general)

Venue：札幌市 Country：Japan

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2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

日本海洋学会2022年度秋季大会 2022.9

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Event date： 2022.9

Language：Japanese

Venue：名古屋市 Country：Japan
2019/20年の中緯度全体の異常な暖冬をもたらした中緯度の海面水温

安藤雄太, 立花義裕

日本海洋学会2022年度秋季大会 2022.9 日本海洋学会

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Event date： 2022.9

Language：Japanese Presentation type：Oral presentation (general)

Venue：名古屋市 Country：Japan

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A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana, Kazuaki Nishii

Japan Geoscience Union Meeting 2022 2022.6

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Event date： 2022.5 - 2022.6

Language：English

Venue：Chiba Country：Japan
A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana, Kazuaki Nishii

Japan Geoscience Union Meeting 2022 2022.6 Japan Geoscience Union

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Event date： 2022.5 - 2022.6

Language：English Presentation type：Poster presentation

Venue：Chiba Country：Japan

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寒冷渦指標でみる日本海側の大雪をもたらす環境場の特徴

安藤雄太, 本田明治, 春日悟

日本気象学会2021年年度秋季大会 2021.12

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Event date： 2021.12

Language：Japanese

Venue：津市 Country：Japan
シベリアの寒冷化がもたらす初冬の極夜ジェットの季節進行の停滞 Invited

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

日本地球惑星科学連合（JpGU）2021年大会 2021.6

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Event date： 2021.5 - 2021.6

Language：Japanese

Venue：オンライン Country：Japan
Detection of a climatological short break in the polar night jet in early winter and its relation to cooling over Siberia International conference

Yuta Ando, Koji Yamazaki, Yoshihiro Tachibana, Masayo Ogi, Jinro Ukita

The 11th Symposium on Polar Science 2020.12

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Event date： 2020.12

Language：English

Venue：Online Country：Japan
中緯度の海陸コントラストがもたらす初冬の成層圏循環の弱化

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

日本海洋学会2020年度秋季大会 2020.11

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Event date： 2020.11

Language：Japanese

Venue：オンライン Country：Japan
シベリアの寒冷化に伴う海陸コントラストがもたらす初冬の極夜ジェットの弱化

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

雪氷研究大会2020 2020.11

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Event date： 2020.11

Language：Japanese

Venue：オンライン Country：Japan
シベリアの寒冷化に伴う海陸コントラストがもたらす初冬の極夜ジェットの弱化

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

日本気象学会2020年度秋季大会 2020.10

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Event date： 2020.10

Language：Japanese

Venue：オンライン Country：Japan
Detection of a weakening in the polar night jet in early winter and its relation to cooling over Siberia International conference

Yuta Ando, Koji Yamazaki, Yoshihiro Tachibana, Masayo Ogi, Jinro Ukita

JpGU-AGU Joint Meeting 2020 2020.7

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Event date： 2020.7

Language：English

Venue：Online Country：Japan
Detection of a climatological short break in the polar night jet in early winter and its relation to cooling over Siberia International conference

Yuta Ando, Koji Yamazaki, Yoshihiro Tachibana, Masayo Ogi, Jinro Ukita

AGU Fall meeting 2019 2019.12

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Event date： 2019.12

Language：English

Venue：San Francisco Country：United States
日本の気温に影響を与える大気循環と周辺の海面水温の季節変化

安藤雄太, 小木雅世, 立花義裕, 山崎孝治

日本気象学会2019年度秋季大会 2019.10

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Event date： 2019.10

Language：Japanese

Venue：福岡市 Country：Japan
日本の気温に影響を与える周辺の海面水温と大気循環の季節変化

安藤雄太, 小木雅世, 立花義裕, 山崎孝治

日本海洋学会2019年度秋季大会 2019.9

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Event date： 2019.9

Language：Japanese

Venue：富山市 Country：Japan
初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

日本地球惑星科学連合（JpGU）2019年大会 2019.5

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Event date： 2019.5

Language：Japanese

Venue：千葉市 Country：Japan
Detection of a Climatological Short Break in the Polar Night Jet in Early Winter and its Relation to Cooling over Siberia International conference

Yuta Ando, Koji Yamazaki, Yoshihiro Tachibana, Masayo Ogi, Jinro Ukita

SPARC General Assembly 2018 2018.10

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Event date： 2018.10

Language：English

Venue：Kyoto Country：Japan
渦相関観測システムがとらえた乱流フラックス～夏季の海面水温の表面加熱との関係～

安藤雄太, 立花義裕, 根田昌典, 前川陽一, 中村亨, 奥村順哉

平成29年度日本気象学会中部支部研究会 2017.11

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Event date： 2017.11

Language：Japanese

Venue：岐阜市 Country：Japan
初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化～過去と近年の違い～

安藤雄太, 山崎孝治, 立花義裕, 小木雅世, 浮田甚郎

日本気象学会2017年度秋季大会 2017.11

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Event date： 2017.10 - 2017.11

Language：Japanese

Venue：札幌市 Country：Japan
A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana

The 13th Symposium on Polar Science 2022.11

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Language：English

Venue：Tachikawa Country：Japan
三重大学練習船「勢水丸」に常設されている超音波風速計がとらえた乱流フラックス

安藤雄太

日本海洋学会2012年度春季大会 2012.3

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Venue：筑波大学第2エリア Country：Other

中緯度の大気海洋相互作用に関する研究は，最近注目されている．この大気海洋相互作用の素過程は，海面の乱流フラックスである．衛星データやモデルを使用した研究が多くあるが，これらは間接的に乱流フラックスを計算しており，直接観測による研究は非常に少ない．その原因は，直接乱流フラックスを測定する超音波風速計が常設されている船舶が国内に2隻のみだからである．その1隻が三重大学練習船「勢水丸」である．本研究では，黒潮上で勢水丸が直接とらえた乱流フラックスを統計的に解析し，黒潮が大気に与える影響を解明することを研究目的とする．解析の結果，年間を通して黒潮が大気に影響を与えていることが直接観測により示唆された．
三重大学練習船「勢水丸」に常設されている超音波風速計がとらえた乱流フラックス

安藤雄太

日本気象学会2012年度春季大会 2012.5

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Venue：つくば国際会議場 Country：Other
直接観測による黒潮上の乱流フラックス

安藤雄太

日本海洋学会2012年度秋季大会 2012.9

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Venue：静岡県静岡市 Country：Other

中緯度の大気海洋相互作用に関する研究は，最近注目されている．この大気海洋相互作用の素過程は，海面の乱流フラックスである．衛星データやモデルを使用した研究が多くあるが，これらは間接的に乱流フラックスを計算しており，直接観測による研究は非常に少ない．その原因は，直接乱流フラックスを測定する超音波風速計が常設されている船舶が国内に1隻のみだからである．それが三重大学練習船「勢水丸」である．本研究では，黒潮上で勢水丸が直接とらえた乱流フラックスを統計的に解析し，黒潮が大気に与える影響を解明することを研究目的とする．解析の結果，乱流顕熱フラックスは，冬にSSTフロントからの距離に強く依存するが，夏はあまり依存しないことが示唆された．また，乱流潜熱フラックスは，年間を通じてSSTフロントからの距離に強く依存することが示唆された．
直接観測による黒潮上の乱流フラックス

安藤雄太

日本気象学会2012年度秋季大会 2012.10

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Venue：北海道札幌市 Country：Other
2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係

安藤雄太

日本気象学会2013年度春季大会 2013.5

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Venue：東京 Country：Other
2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係

安藤雄太

日本海洋学会2013年度秋季大会 2013.9

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Venue：札幌 Country：Other

2012年秋～冬はAO負かつWP負が持続した．さらに北日本周辺のSSTが過去最高値を記録するなど，特異な現象が起こった．先行研究によれば，日本の冬季気温にはAO・WPが大きな影響を与えることを指摘している．AO負かつWP負で日本は寒くなる傾向が知られているが，2012年10～12月はAO負かつWP負にも関わらず，高温であった期間もあった．本研究ではこの違いの原因について調べた．AO・WP indexを日本の気温に回帰すると，有意なシグナルが得られる．しかし，これらだけなく日本海SSTとも有意なシグナルがあることが明らかとなった．日本海SSTは大気大循環とは同時には独立な変動であった．
2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係

安藤雄太

研究集会「異常気象と気候システム変動のメカニズムと予測可能性」 2013.10

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Venue：京都 Country：Other
2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係

安藤雄太

日本気象学会2013年度秋季大会 2013.11

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Venue：仙台 Country：Other
2012/13 abnormal cold winter in Japan associated with Large-scale Atmospheric Circulation and Local Sea Surface Temperature over the Sea of Japan International conference

安藤雄太

AGU Fall meeting 2013 2013.12

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Venue：San Francisco, USA Country：Other

2012/13 abnormal cold winter in Japan associated with Large-scale Atmospheric Circulation and Local Sea Surface Temperature over the Sea of Japan
大気循環と日本周辺の海面水温が日本の気候に与える影響

安藤雄太

日本気象学会2014年度春季大会 2014.5

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Venue：横浜 Country：Other
Abnormal winter weather in Japan during 2012 controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

EGU General Assembly 2014 2014.5

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Venue：Vienna, Austria Country：Other

Abnormal winter weather in Japan during 2012 controlled by large-scale atmospheric and small-scale oceanic phenomena
Abnormal winter weather in Japan during 2012 controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

AOGS 11th Annual Meeting 2014.7

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Venue：札幌 Country：Other

Abnormal winter weather in Japan during 2012 controlled by large-scale atmospheric and small-scale oceanic phenomena
日本周辺の海面水温と大気循環が日本の気候に与える影響

安藤雄太

2014 年度日本海洋学会秋季大会 2014.9

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Venue：長崎 Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
大気循環と日本周辺の海面水温が日本の気候に与える影響

安藤雄太

日本気象学会2014年度秋季大会 2014.10

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Venue：福岡 Country：Other
大気循環と周辺の海面水温が日本の気候に与える影響～秋から冬への変遷期～

安藤雄太

急発達する低気圧の実態・予測・災害軽減に関する研究集会 2014.11

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Venue：宇治 Country：Other
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

AGU Fall meeting 2014 2014.12

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Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

18th Pacific-Asian Marginal Seas Meeting 2015.4

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Venue：Naha, Japan Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

Arctic Science Summit Week 2015 2015.4

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Venue：Toyama, Japan Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
大気循環と周辺の海面水温が初冬の日本に与える影響

安藤雄太

2015年度日本気象学会春季大会 2015.5

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Venue：つくば Country：Other
台風通過による海面水温低下が他の台風経路に与える影響

安藤雄太

2015年度日本気象学会春季大会 2015.5

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Venue：つくば Country：Other
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

IUGG General Assembly 2015 2015.6

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Venue：Prague, Czech Republic Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
初冬の日本に影響を与える周辺の海面水温と大気循環の季節変化

安藤雄太

2015年度日本海洋学会秋季大会, 2015.9

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Venue：松山 Country：Other
初冬の日本に影響を与える周辺の海面水温と大気循環の季節変化

安藤雄太

2015年度日本気象学会秋季大会 2015.10

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Venue：京都 Country：Other
Impact of Typhoon-induced sea surface cooling on the track of next Typhoon International conference

安藤雄太

Asian Conference on Meteorology 2015 2015.10

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Venue：Kyoto, Japan Country：Other

Impact of Typhoon-induced sea surface cooling on the track of next Typhoon
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

The Sixth Symposium on Polar Science 2015.11

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Venue：Tachikawa, Japan Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

Arctic Net Annual Scientific Meeting 2015 2015.12

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Venue：Vancouver, Canada Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
Impact of Typhoon-induced sea surface cooling on the track of next Typhoon International conference

安藤雄太

AGU Fall meeting 2015 2015.12

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Venue：San Francisco, USA Country：Other

Impact of Typhoon-induced sea surface cooling on the track of next Typhoon
Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena International conference

安藤雄太

Ocean Sciences Meeting 2016 2016.2

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Venue：New Orleans, USA Country：Other

Winter weather in Japan controlled by large-scale atmospheric and small-scale oceanic phenomena
初冬の日本に影響を与える周辺の海面水温と大気循環の季節変化

安藤雄太

GRENE北極気候変動研究事業研究成果報告会 2016.3

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Venue：立川 Country：Other
渦相関観測システムがとらえた乱流フラックス -夏季の海面水温の表面加熱との関係-

安藤雄太

2016年度日本海洋学会秋季大会 2016.9

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Venue：鹿児島 Country：Other
初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化

安藤雄太

2016年度日本気象学会秋季大会 2016.10

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初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化

安藤雄太

東アジア域における大気循環の季節内変動に関する研究集会 2016.11

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Country：Other
Stagnant of season’s transition of Polar night jet in early winter related with cooling over Siberia International conference

安藤雄太

The Seventh Symposium on Polar Science 2016.11

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Stagnant of season’s transition of Polar night jet in early winter related with cooling over Siberia
The direction of turbulent heat flux by a direct measurement was opposite to an indirect estimation over calm oceans in summer International conference

安藤雄太

AGU Fall meeting 2016 2016.12

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The direction of turbulent heat flux by a direct measurement was opposite to an indirect estimation over calm oceans in summer
Short break of Polar night jet in early winter related with cooling over Siberia International conference

安藤雄太

Arctic Net Annual Scientific Meeting 2016 2016.12

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Short break of Polar night jet in early winter related with cooling over Siberia
A hemispheric extreme warm winter in 2019-20 enhanced by the highest sea surface temperature around mid-latitude International conference

Yuta Ando, Yoshihiro Tachibana

The 13th Symposium on Polar Science 2022.11 National Institute of Polar Research

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Venue：Tachikawa Country：Japan

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MISC

縁辺海が日本の気候に及ぼす影響—気候系のHotspot : 中緯度大気海洋相互作用研究の新展開

安藤雄太, 小木雅世, 立花義裕

気象研究ノート 2021.10

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縁辺海が日本の気候に及ぼす影響—気候系のHotspot : 中緯度大気海洋相互作用研究の新展開
初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化~過去と近年の違い~

安藤雄太, 立花義裕, 山崎孝治, 山崎孝治, 中村哲, 西井和晃, 小木雅世, 浮田甚郎

日本気象学会大会講演予稿集 2017.9

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初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化~過去と近年の違い~
初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化

安藤雄太, 立花義裕, 山崎孝治, 山崎孝治, 中村哲, 西井和晃, 小木雅世, 浮田甚郎

日本海洋学会大会講演要旨集 2017.9

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初冬の極夜ジェットの季節進行の停滞とシベリアの寒冷化
C167 初冬の日本に影響を与える大気循環と周辺の海面水温の季節変化(中高緯度大気,一般口頭発表)

安藤雄太, 小木雅世, 立花義裕, 小寺邦彦, 山崎孝治

大会講演予講集 2015.10

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P328 大気循環と周辺の海面水温が初冬の日本に与える影響(ポスター・セッション)

安藤雄太, 小木雅世, 立花義裕, 小寺邦彦, 山崎孝治

大会講演予講集 2015.5

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P431 台風通過による海面水温低下が他の台風経路に与える影響(ポスター・セッション)

堀口桃子, 安藤雄太, 小寺邦彦, 立花義裕, 山崎孝治

大会講演予講集 2015.5

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A173 大気循環と日本周辺の海面水温が日本の気候に与える影響 : 秋から冬への変遷期(気候システムI,口頭発表)

安藤雄太, 小木雅世, 立花義裕, 小寺邦彦, 山崎孝治

大会講演予講集 2014.10

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A161 大気循環と日本周辺の海面水温が日本の気候に与える影響(モンスーン・熱帯気象研究の新たなブレイクスルーを目指して-村上多喜雄先生追悼特別セッション-,専門分科会)

安藤雄太, 小木雅世, 立花義裕, 小寺邦彦, 山崎孝治

大会講演予講集 2014.5

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B352 2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係(近年における日本の冬の気象 : 気候変動,遠隔応答の枠組みからの理解,スペシャル・セッション)

安藤雄太, 小木雅世, 立花義裕

大会講演予講集 2013.11

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A413 2012/13年の寒冬とAO・WPパターン・日本周辺の海面水温との関係(気象システムII,口頭発表)

安藤雄太, 小木雅世, 立花義裕

大会講演予講集 2013.5

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16. 三重大学練習船｢勢水丸｣に設置された超音波風速計がとらえた乱流フラックス

安藤雄太, 立花義裕, 根田昌典

水産海洋研究 2013.2

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C111 直接観測による黒潮上の乱流フラックス(中高緯度大気・相互作用,口頭発表)

安藤雄太, 立花義裕, 根田昌典

大会講演予講集 2012.10

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B163 三重大学練習船「勢水丸」に常設されている超音波風速計がとらえた乱流フラックス : 黒潮横断観測(東アジアモンスーンと黒潮(II)-中緯度大気海洋相互作用に着目した新たな研究のパラダイム,専門分科会)

安藤雄太, 立花義裕, 根田昌典

大会講演予講集 2012.5

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Professional Memberships

American Geophysical Union
American Meteorological Society
European Geosciences Union
The Oceanography Society
JAPAN GEOSCIENCE UNION
METEOROLOGICAL SOCIETY OF JAPAN
THE JAPAN SOCIETY OF FLUID MECHANICS
THE OCEANOGRAPHIC SOCIETY OF JAPAN
THE JAPANESE SOCIETY OF SNOW AND ICE
THE JAPANESE SOCIETY OF SNOW AND ICE

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THE OCEANOGRAPHIC SOCIETY OF JAPAN

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THE JAPAN SOCIETY OF FLUID MECHANICS

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METEOROLOGICAL SOCIETY OF JAPAN

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JAPAN GEOSCIENCE UNION

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The Oceanography Society

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European Geosciences Union

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American Meteorological Society

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American Geophysical Union

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Academic Activities

Japan Geoscience Union Meeting 2025, Session: Extratropical oceans and atmosphere

Role(s)： Panel moderator, session chair, etc.

Japan Geoscience Union 2025.5

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Japan Geoscience Union Meeting 2024, Session: Extratropical oceans and atmosphere

Role(s)： Panel moderator, session chair, etc.

Japan Geoscience Union 2024.5

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パネル司会・セッションチェア等

日本地球惑星科学連合2023年大会中緯度大気海洋相互作用セッション（ Japan ） 2023.5

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Japan Geoscience Union Meeting 2023, Session: Extratropical oceans and atmosphere

Role(s)： Panel moderator, session chair, etc.

Japan Geoscience Union 2023.5

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パネル司会・セッションチェア等

日本地球惑星科学連合2022年大会中緯度大気海洋相互作用セッション（ Japan ） 2022.5

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Japan Geoscience Union Meeting 2022, Session: Extratropical oceans and atmosphere

Role(s)： Panel moderator, session chair, etc.

Japan Geoscience Union 2022.5

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Visiting, concurrent, or part-time lecturers at other universities, institutions, etc.

2022 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2021 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2020 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2019 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2018 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2017 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ
2016 鈴鹿高等専門学校 Classification:Part-time lecturer Domestic/International Classification:Japan

Semester, Day Time or Duration：後期，現代科学Ⅳ

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