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    題名: The Correlation of Outgoing Longwave Radiation and Temperature in the Tropical Tropopause Layer: FORMOSAT-3/COSMIC Observations
    作者: Wang, Kaiti;Wu, Yi-Chao;Lin, Jia-Ting;Tan, Pei-Hua
    日期: 2016-07-29
    上傳時間: 2016-09-23 02:10:58 (UTC+8)
    摘要: The properties of lapse rate minimum (LRM), including its altitude and temperature, in the global tropical belt from 20oS to 20oN are analyzed to study the phenomena in the tropical tropopause layer (TTL). The data used include the 3-year data based on the radio occultation observations acquired from FORMOSAT-3/COSMIC mission in the period of November 2006 to October 2009. The correlations between Outgoing Longwave Radiation (OLR) and measured temperatures at LRM are derived, and the correlations are higher at regions where OLR is lower, that is, where the tropical convection is active. Two regions with higher correlations, 60oE to 180oE, and 90oW to 30oE, are selected to examine the averaged altitudinal dependence of such correlations so as to investigate the extent to which the convection may still dominate above LRM. The correlations reach maximum at the LRM altitude and gradually decrease as the altitude ascends, but the magnitude stays similar up to 2 km above LRM, which implies that the convection mechanism could be dominant up to this height. The correlations drop sharply from about 4 to 5 km above the LRM altitude, which is likely because the radiative transfer mechanism becomes dominant and the altitude is close to the cold point tropopause (CPT). Below the LRM altitude, the correlation decreases with a lower rate as the altitude descends to about 5km deeper, the lower limit of the altitude retrieved, suggesting that the convection is dominant throughout this altitudinal range.
    關聯: Abstracts of 6th IAGA/ICMA/SCOSTEP Workshop
    顯示於類別:[航空太空工程學系暨研究所] 會議論文

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