Decadal changes in tropical convection suggest effects on stratospheric water vapor
Decadal changes in tropical convection suggest effects on stratospheric water vapor
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热带对流的年代际变化表明对平流层水蒸气的影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
C. Zerefos
中科院分区：
文献类型：
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作者：
G. Tselioudis;E. Tromeur;W. Rossow;C. Zerefos
对 ISCCP 云属性检索的聚类分析得出的热带天气状态卫星观测结果表明，从 1983 年到 2000 年左右，深对流天气状态的频率有所增加，此后保持在几乎恒定的水平。最剧烈的深对流增加发生在 1993 年至 2000 年间。这种对流变化是由印度洋和中西部太平洋地区发生的变化驱动的，这些地区是大多数深热带对流发生的地区。考虑到检查期间卫星覆盖范围变化而进行的分析修改不会改变这些发现。之前的研究表明，从 1980 年到 2000 年，平流层水蒸气增加，此后下降到较低水平，并一直持续到今天，这种变化可以部分解释最近全球气温的变化。由于热带深对流是影响平流层水汽浓度的重要机制，观测到的热带深对流的年代际变化可以部分解释平流层水汽变化模式。
Analysis of satellite observations of tropical Weather States derived from a cluster analysis of ISCCP cloud property retrievals, shows that the deep convection Weather State increased in frequency from 1983 to about 2000 and remained at a nearly constant level after that. The sharpest deep convection increase occurred between 1993 and 2000. This convection variability is driven by changes that occur in the Indian Ocean and the Western‐Central Pacific regions, which are the regions where the majority of deep tropical convection occurs. Analysis modifications to account for satellite coverage changes during the period under examination do not alter these findings. Previous studies showed that stratospheric water vapor increased from 1980 to 2000 and dropped after that to lower levels that persist until today, and that this change could explain part of the recent global temperature variability. Since tropical deep convection is an important mechanism affecting stratospheric water vapor concentrations, the observed decadal changes in tropical deep convection could explain in part the stratospheric water vapor variability patterns.