Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-15095-2017 |
Characterizing energy budget variability at a Sahelian site: a test of NWP model behaviour | |
Mackie, Anna1; Palmer, Paul I.1,2; Brindley, Helen3 | |
2017-12-21 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Scotland; England |
英文摘要 | We use observations of surface and top-of-the-atmosphere (TOA) broadband radiation fluxes determined from the Atmospheric Radiation Measurement programme mobile facility, the Geostationary Earth Radiation Budget (GERB) and Spinning Enhanced Visible and Infrared Imager (SEVIRI) instruments and a range of meteorological variables at a site in the Sahel to test the ability of the ECMWF Integrated Forecasting System cycle 43r1 to describe energy budget variability. The model has daily average biases of 12 and 18Wm(-2) for outgoing longwave and reflected shortwave TOA radiation fluxes, respectively. At the surface, the daily average bias is 12(13) Wm(-2) for the longwave downwelling (upwelling) radiation flux and -21(-13) Wm(-2) for the shortwave downwelling (upwelling) radiation flux. Using multivariate linear models of observation-model differences, we attribute radiation flux discrepancies to physical processes, and link surface and TOA fluxes. We find that model biases in surface radiation fluxes are mainly due to a low bias in ice water path (IWP), poor description of surface albedo and model-observation differences in surface temperature. We also attribute observed discrepancies in the radiation fluxes, particularly during the dry season, to the misrepresentation of aerosol fields in the model from use of a climatology instead of a dynamic approach. At the TOA, the low IWP impacts the amount of reflected shortwave radiation while biases in outgoing longwave radiation are additionally coupled to discrepancies in the surface upwelling longwave flux and atmospheric humidity. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418423900001 |
WOS关键词 | OPTICAL DEPTH ; CLIMATE ; DUST ; REANALYSIS ; FACILITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20534 |
专题 | 地球科学 |
作者单位 | 1.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland; 2.Univ Edinburgh, Natl Ctr Earth Observat, Edinburgh, Midlothian, Scotland; 3.Imperial Coll London, Natl Ctr Earth Observat, London, England |
推荐引用方式 GB/T 7714 | Mackie, Anna,Palmer, Paul I.,Brindley, Helen. Characterizing energy budget variability at a Sahelian site: a test of NWP model behaviour[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(24). |
APA | Mackie, Anna,Palmer, Paul I.,&Brindley, Helen.(2017).Characterizing energy budget variability at a Sahelian site: a test of NWP model behaviour.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(24). |
MLA | Mackie, Anna,et al."Characterizing energy budget variability at a Sahelian site: a test of NWP model behaviour".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.24(2017). |
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