E-131 暖水域に対する熱帯大気応答のアンサンブル水惑星実験による研究

概要

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The initial development of the atmospheric response to a warm SST anomaly placed at the equator is examined by way of an ensemble switch-on experiment with an aqua planet GCM. An ensemble average of the size of 128 satisfactory reduces the transient noise and reveal the character of the response which follows. In a few days after the switch-on of the SST anomaly, a convection center develops, and a global increase of surface pressure occurs as a barotropic response to the heating. The response afterward is consistent with Gill (1980); a warm Kelvin/Rossby wave-like anomaly is emitted to the east/west of the convection center, except that the characteristic wave speed is that of moist gravity waves. After several days, precipitation is intensified/suppressed to the east/west of the SST anomaly because of the surface frictional convergence/divergence caused by relative low/high pressure anomaly along the equator in the Kelvin/Rossby wave-like response.
日本流体力学会の論文
2003-07-28