| タイトル | Thermodynamics and Cloud Radiative Effect from the First Year of GoAmazon |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160000944 |
| 著者（英） | Miller, Mark; Collow, Allie Marquardt; Trabachino, Lynne |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2015-12-07 |
| 言語 | eng |
| 内容記述 | Deforestation is an ongoing concern for the Amazon Rainforest of Brazil and associated changes to the land surface have been hypothesized to alter the climate in the region. A comprehensive set of meteorological observations at the surface and within the lower troposphere above Manacapuru, Brazil and data from the Modern Era Retrospective Analysis for Research and Applications Version 2 (MERRA-2) are used to evaluate the seasonal cycle of cloudiness, thermodynamics, and the radiation budget. While ample moisture is present in the Amazon Rainforest year round, the northward progression of the Hadley circulation during the dry season contributes to a drying of the middle troposphere and inhibits the formation of deep convection. This results in a reduction in cloudiness and precipitation as well as an increase in the height of the lifting condensation level, which is shown to have a negative correlation to the fraction of low clouds. Frequent cloudiness prevents solar radiation from reaching the surface and clouds are often reflective with high values of shortwave cloud radiative effect at the surface and top of the atmosphere. Cloud radiative effect is reduced during the dry season however the dry season surface shortwave cloud radiative effect is still double what is observed during the wet season in other tropical locations. Within the column, the impact of clouds on the radiation budget is more prevalent in the longwave part of the spectrum, with a net warming in the wet season. |
| NASA分類 | Meteorology and Climatology; Fluid Mechanics and Thermodynamics |
| レポートNO | GSFC-E-DAA-TN28811 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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