Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1175/JCLI-D-14-00230.1 |
Detection and Analysis of an Amplified Warming of the Sahara Desert | |
Cook, Kerry H.; Vizy, Edward K. | |
通讯作者 | Cook, Kerry H. |
来源期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2015 |
卷号 | 28期号:16页码:6560-6580 |
英文摘要 | Evaluation of three reanalyses (ERA-Interim, NCEP-2, and MERRA) and two observational datasets [CRU and Global Historical Climatology Network (GHCN)] for 1979-2012 demonstrates that the surface temperature of the Sahara Desert has increased at a rate that is 2-4 times greater than that of the tropical-mean temperature over the 34-yr time period. While the response to enhanced greenhouse gas forcing over most of the globe involves the full depth of the atmosphere, with increases in longwave back radiation increasing latent heat fluxes, the dryness of the Sahara surface precludes this response. Changes in the surface heat balance over the Sahara during the analysis period are primarily in the upward and downward longwave fluxes. As a result, the warming is concentrated near the surface, and a desert amplification of the warming occurs. The desert amplification is analogous to the polar amplification of the global warming signal, which is concentrated at the surface, in part, because of the vertical stability of the Arctic atmosphere. Accompanying the amplified surface warming of the Sahara is a strengthening of both the summertime heat low and the African easterly jet and a weakening of the wintertime anticyclone and the low-level Harmattan winds. Potential implications of the desert amplification include decreases in mineral dust aerosols globally, decreases in wintertime cold air surge activity, and increases in Sahel rainfall. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000359655200017 |
WOS关键词 | ERA-INTERIM ; CLIMATE MODELS ; ENERGY BUDGET ; GLOBAL ENERGY ; WATER-VAPOR ; HEAT LOW ; OCEAN ; REANALYSIS ; ATMOSPHERE ; SURFACE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188487 |
作者单位 | Univ Texas Austin, Dept Geol Sci, Jackson Sch Geosci, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Cook, Kerry H.,Vizy, Edward K.. Detection and Analysis of an Amplified Warming of the Sahara Desert[J],2015,28(16):6560-6580. |
APA | Cook, Kerry H.,&Vizy, Edward K..(2015).Detection and Analysis of an Amplified Warming of the Sahara Desert.JOURNAL OF CLIMATE,28(16),6560-6580. |
MLA | Cook, Kerry H.,et al."Detection and Analysis of an Amplified Warming of the Sahara Desert".JOURNAL OF CLIMATE 28.16(2015):6560-6580. |
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