Climate dynamics; Air-sea interaction; Extreme weather and climate variability/change
1) Climate dynamics, with particular emphasis on large-scale air-sea interaction in midlatitude, subtropical and subpolar regions, including decadal variability in the Pacific. Ocean atmsphere-land interaction and the formation of subtropical highs.2) A new perspective on dynamics of storm tracks and related midlatitude atmosphere-ocean interaction, which we propose as a new perspective for the formation of the tropospheric general circulation; interaction between baroclinic eddies and stationary circulation anomalies such as blocking.3) Dynamics of blocking formation, with emphasis on local breaking of a Rossby wavetrain and interaction with a storm track. Amplification of a cold surface anticyclone such as the Okhotsk High and Siberian High through interaction between blocking and surface baroclinicity.4) Identification of a new type of a preferred modeof monthly circulation anomalies that can extract energy from the mean flow associated with the Asian monsoon and induce anomalous cumulusconvection for generating potential energy. 5) Troposphere-stratosphere linkage via Rossbywave packets (3-D teleconnection).
1. Miyamoto, A., H. Nakamura, T. Miyasaka, 2018: Influence of the subtropical high and stormtrack on low-cloud fraction and its seasonality over the South Indian Ocean, J. Climate, 31, 4017-4038.