Moisture depletion in the surface layer in response to an annular solar eclipse
Moisture depletion in the surface layer in response to an annular solar eclipse
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DOI：
10.1016/j.jastp.2012.02.025
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发表时间：
2012-05-01
影响因子：
1.9
通讯作者：
Jagannathan, R.
中科院分区：
文献类型：
--
作者：
Bhat, G. S.;Jagannathan, R.
日食提供了一个难得的机会来研究辐射，土地和大气之间的相互作用下，太阳强迫明显不同于正常条件。2010年1月15日的日环食是一个机会，这是千年来最长的日环食，印度部分地区在下午早些时候经历了高达92%的黑暗。在1月8日至18日期间，在靠近日食中心线的陆地站进行了详细的测量。本研究的重点是日环食对水汽浓度的影响，这是过去研究中忽略的一个方面。在整个11天的研究期间，相对湿度的最低值出现在日食结束时。比湿度在日食期间下降了2 g kg（-1），并继续下降了几个小时。它在第二天下午恢复到日食前的数值。湿度下降是由于日食期间和日食后较干燥的空气下沉增加。(C)2012爱思唯尔有限公司保留所有权利。
Eclipse provides a rare occasion to study the interactions between radiation, land and atmosphere under a solar forcing distinctly different from normal conditions. An opportunity came during the annular solar eclipse of 15 January 2010, the longest annular eclipse of the millennium where parts of India experienced up to 92% obscurity in early afternoon hours. Detailed measurements were carried out in the surface layer during 8-18 January at a land station located close to the central line of the eclipse. The focus of this study is on the effect of the annular eclipse on water vapor concentration, an aspect neglected in the past studies. During the entire 11-day study period, the lowest value in relative humidity occurred towards the end of the eclipse. Specific humidity decreased by 2 g kg(-1) during the eclipse and continued to decrease for few more hours. It recovered to the pre-eclipse values in the following afternoon. Humidity decrease is attributed to increased subsidence of drier air during and after the eclipse. (C) 2012 Elsevier Ltd. All rights reserved.