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Masato Mori Last modified date:2021.05.25

Graduate School

 Reseacher Profiling Tool Kyushu University Pure
Research Gate .
Country of degree conferring institution (Overseas)
Field of Specialization
climate dynamics
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Outline Activities
My research interests include atmospheric circulation variability that cause extreme weather events. We aim to understand climate variability and change by clarifying the mechanisms and predictability of atmospheric circulation variability and estimating (attribution) the impact of external factors such as global warming on that through climate diagnostics using reanalysis data and numerical experiments using dynamical models and global climate models.
Research Interests
  • Impacts of global warming-induced Arctic sea ice change on the mid-latitude atmosphere
    keyword : Arctic sea ice variability, remote influence, global warming
  • Dynamics of the Pacific/North American Teleconnection Pattern
    keyword : PNA, MJO, teleconnection, low-frequency variability, storm track
  • Seasonal and near-term prediction of tropical cyclone activity over the Western North Pacific
    keyword : tropical cyclone, seasonal prediction, near-term prediction, CGCM
  • Understanding the formation mechanism of the atmospheric general circulation in the tropics using aqua planet experiments
    keyword : aqua planet, superrotation, Hadley Circulation, Walker Circulation
Academic Activities
1. Masato Mori, Masahiro Watanabe, Hideo Shiogama, Jun Inoue, Masahide Kimoto, Robust Arctic sea-ice influence on the frequent Eurasian cold winters in past decades, NATURE GEOSCIENCE, 10.1038/NGEO2277, 7, 12, 869-873, 2014.12, Over the past decade, severe winters occurred frequently in mid-latitude Eurasia(1,2), despite increasing global- and annual-mean surface air temperatures(3). Observations suggest that these cold Eurasian winters could have been instigated by Arctic sea-ice decline(2,4), through excitation of circulation anomalies similar to the Arctic Oscillation(5). In climate simulations, however, a robust atmospheric response to sea-ice decline has not been found, perhaps owing to energetic internal fluctuations in the atmospheric circulation(6). Here we use a 100-member ensemble of simulations with an atmospheric general circulation model driven by observation-based sea-ice concentration anomalies to show that as a result of sea-ice reduction in the Barents-Kara Sea, the probability of severe winters has more than doubled in central Eurasia. In our simulations, the atmospheric response to sea-ice decline is approximately independent of the Arctic Oscillation. Both reanalysis data and our simulations suggest that sea-ice decline leads to more frequent Eurasian blocking situations, which in turn favour cold-air advection to Eurasia and hence severe winters. Based on a further analysis of simulations from 22 climate models we conclude that the sea-ice-driven cold winters are unlikely to dominate in a warming future climate, although uncertainty remains, due in part to an insufficient ensemble size..
Membership in Academic Society
  • the Meteorological Society of Japan
  • Japan Geoscience Union