谢安,陈受钧. 1984. 暴雨系统中的辐射特征[J]. 气象学报, 42(2):177-188, doi:10.11676/qxxb1984.021 |
暴雨系统中的辐射特征 |
BADIATIVE FEATURES IN THE RAINSTORM |
投稿时间:1982-09-04 修订日期:1983-03-14 |
DOI:10.11676/qxxb1984.021 |
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中文摘要: |
本文应用参数化的辐射计算方案,计算了北京地区暴雨过程和江淮流域梅雨气旋中长波辐射降冷率和短波辐射增温率.结果表明,在暴雨云区,白天中午的短波辐射增温率最大可达6℃/日.最大辐射增温出现在对流层上层的300-400毫巴处.它的垂直分布特征和积云加热率相似.长波辐射使云中的层结不稳定化,这可能是暴雨夜间多发性的原因之一.总的说来,辐射效应有利于云和暴雨的发展.本文的初步分析有助于了解暴雨过程中辐射作用的相对重要性和暴雨的机制,以及在数值模式中引入辐射过程后可能产生的影响. |
英文摘要: |
Long-wave cooling rate and short-wave warming rate during the heavy precipitation in Beijing are calculated by the parametric method.In the day time,the cloud-absorbed short-wave energy causes a maximum heating about 6℃·day-1 in the rain cloud cluster.The maximum warming rate occurs in the upper troposphere between 300 and 400 mb.The vertical distribution of radiative heating is very similar to that of convective heating.Long-wave cooling in cloud and subcloud layer over the rain area is less than that in the surrounding clear area.That causes a relative warming in the lower troposphere over the rain area.There is a relative large cooling on the top of the cloud due to long wave radiation.This factor acts more strongly in the evening,6 hours before the so called "night rainstorm". |
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