Research Center for Advanced Science and Technology

Office: RCAST Bldg.No.3-410
TEL: +81-3-5452-5145
FAX: +81-3-5452-5148

Research Field

Climate dynamics; Air-sea interaction; Extreme weather and climate variability/change

Current Research

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).

Representative Publications

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.
2. Masunaga, R., H. Nakamura, B. Taguchi, T. Miyasaka, 2020: Processes shaping the time-mean surface wind convergence patterns in winter around the Kuroshio Extension and Gulf Stream, J. Climate, 33, 3-25.
3. Sekizawa, S., H. Nakamura, Y. Kosaka, 2018: Interannual variability of the Australian summer monsoon system internally sustained through wind-evaporation feedback, Geophys. Res. Lett., 45 (15), 7748-7755.