| 摘要: |
| 根据1972和1974年经过黑潮区的两个台风个例,计算和分析了台风各部位在不同的海气条件下热量输送的垂直分布特点。表明,在台风前部信风带中,热量垂直输送限于700hPa以下,在1000hPa处有约167.47—209.34 J/(cm2?h)的最大值,700hPa以上热量向下输送;在台风中心区,热量输送量最大,在1000hPa处接近420 J/(cm2?h),在850hPa附近可能有热输送量的最大值,其上随高度减小;在台风后部偏南气流中,向上热输送量较小;各层最大值不超过84 J/(cm2?h)。 |
| 关键词: 黑潮区域 台风过程 热量计算 |
| DOI： |
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| CALCULATION OF AIR-SEA HEAT FLUX FOR TWO TYPHOONS PASSING THROUGH THE KUROSHIO AREA |
|
Lin Xiaoneng
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Guangzhou Station of Marine Forcasting, SOA 510300
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| Abstract: |
| Based on the data of two typhoon events occuring in 1972 and 1974, which passed through the Kuroshio area, the vertical transportation in different part of typhoon under different air and ocean conditions is calculated and its characteristics are analysed.
At the trade-wind zone in front of typhoon the vertical heat transportation is limited below 700hPa. There are a maximum of 167 - 209 J/(cm2?h) at 1000 hPa. The heat transportation is downward above 700 hPa. At the central area of typhoon, the amount of heat transportation is the largest. It is almost 420 J/(cm2? h) at 1000 hPa. The maximum probably appears at 850 hPa. It decreases with increasing of height, and can reach 250 hPa and above. At the southward air flow behind typhoon, the upward heat transportation is small, the maximum is less than 84 J/(cm2?h).
The variety of heat transportation is due to different strength of convective activity and air-sea temperature difference.
The height of heat transportation can show the height of convection cloud’s growth.
In the ttyphoon flow field, especially in the central area, it seems that the evaluation of 200 hPa as the upper limit is too low, because the heal transportation value is still greater than 41 J/(cm2?h) at the level of 250 hPa. It is suggested that the upper limit of convection should be taken as 100 hPa. |
| Key words: Kuroshio area, Typhoon process, Heat calculation |
