Numerical and Dynamical Analyses of Heat Source Forcing and Restricting Subtropical High Activity |
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Authors: | Zhang Ren Yu Zhihao |
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Affiliation: | Department of Atmospheric Science; Nanjing University; Nanjing 210093,Department of Atmospheric Science; Nanjing University; Nanjing 210093 |
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Abstract: | By using the numerical and dynamical methods, the influence and restriction of the heat source forcing on the subtropical geopotential fields and flow fields are studied and discussed in a model atmosphere. The main results show that the zonal symmetrical solar radiation heating chiefly induces the geopotential field changing gradually and leads the subtropical high moving slowly, but when the zonal asymmetric thermal difference between ocean and continent achieves its critical value, which usually causes the geopotential field a catastrophe, and consequently induces the subtropical high shake-up or jump. The abnormal activity of the subtropical high is possibly caused by the abnormality of the thermal factor. |
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Keywords: | Subtropical high Thermal forcing |
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