An investigation of the global solar radiative forcing due to changes in cloud liquid water path

V. Ramaswamy, C. T. Chen

    研究成果: 雜誌貢獻期刊論文同行評審

    14 引文 斯高帕斯(Scopus)

    摘要

    The instantaneous solar radiative forcing of the surface-atmosphere system associated with a change in the liquid water path (LWP) of low clouds has a significant space-time dependence, owing to the spatial and temporal variations in isolation, solar zenith angle, and surface albedo. This feature is demonstrated by considering globally uniform LWPs and LWP changes. Keeping cloud amounts fixed in space and time, we find that an increase in LWP imparts a distinct meridional gradient to the solar forcing, while the difference between summer and winter forcings introduces a seasonal variation at any given latitude. Relative to the global, annual mean (GAM) value (a negative quantity for an increase in LWP) the forcing is more negative at low latitudes throughout the year and during summer at the high latitudes (poleward of 40°). Thus even the simple assumption of a globally uniform LWP change does not yield a uniform forcing at all latitudes and/or times. While a specific globally uniform LWP increase can yield a global, annual mean radiative forcing that is opposite to but has the same magnitude as that for carbon dioxide increases, such a compensation in the forcing cannot be expected to be uniform with latitude or month. -from Authors

    原文英語
    頁(從 - 到)16,703-16,712
    期刊Journal of Geophysical Research
    98
    發行號D9
    DOIs
    出版狀態已發佈 - 1993

    ASJC Scopus subject areas

    • 地球物理
    • 森林科學
    • 海洋學
    • 海洋科學
    • 生態學
    • 水科學與技術
    • 土壤科學
    • 地球化學與岩石學
    • 地表過程
    • 大氣科學
    • 地球與行星科學(雜項)
    • 空間與行星科學
    • 古生物學

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