Precipitation under Subtropical High Conditions: Evidence and Implications
Precipitation under Subtropical High Conditions: Evidence and Implications
复制标题
副热带高温条件下的降水：证据与启示
DOI：
10.1080/16742834.2009.11446807
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发表时间：
2009-01
期刊：
影响因子：
--
通讯作者：
Feng Sha
中科院分区：
文献类型：
--
作者：
Fu Yunfei;Liu Qi;Feng Sha
Abstract The impact of the subtropical high (STH) on precipitation was investigated on a daily timescale using matched NCEP and the Global Precipitation Climatology Project (GPCP) datasets. Comparison of the conditional probability (intensity) of precipitation under STH conditions with that under non—STH conditions suggests that the presence of the STH conditions has a limited impact on local precipitation. In the West Pacific Subtropical High (WPSH) and the North Atlantic Subtropical High (NASH), precipitation was only 30% lower under STH conditions than under non—STH conditions. The STH conditions had somewhat more impact on precipitation intensity, but it was still 50% less than the intensity under non—STH conditions (mean of roughly 5 mm d-1). Precipitation under STH conditions was found to be highly correlated with vertical motion. Active updrafts occurring even under STH conditions are essential for frequent occurrences and moderate intensities of precipitation.
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