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DOI | 10.5194/acp-17-7917-2017 |
Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system | |
Chen, Dan1,2; Liu, Zhiquan1; Davis, Chris1; Gu, Yu3 | |
2017-06-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | This study investigated the dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using the Weather Research and Forecasting Model with Chemistry (WRF-Chem) coupled with an aerosol data assimilation (DA) system. MODIS AOD (aerosol optical depth) data were assimilated with the Gridpoint Statistical Interpolation (GSI) three-dimensional variational (3DVAR) DA scheme to depict the Saharan dust outbreak events in the 2006 summer. Comparisons with Ozone Monitoring Instrument (OMI), AErosol RObotic NETwork (AERONET), and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) observations showed that the system was capable of reproducing the dust distribution. Two sets of 180 h forecasts were conducted with the dust radiative effects activated (RE_ON) and inactivated (RE_OFF) respectively. Differences between the RE_ON and RE_OFF forecasts showed that low-altitude (high-altitude) dust inhibits (favors) convection owing to changes in convective inhibition (CIN). Heating in dust layers immediately above the boundary layer increases inhibition, whereas sufficiently elevated heating allows cooling above the boundary layer that reduces convective inhibition. Semi-direct effects in which clouds are altered by thermodynamic changes are also noted, which then alter cloudradiative temperature (T) changes. The analysis of a tropical cyclone (TC) suppression case on 5 September shows evidence of enhanced convective inhibition by direct heating in dust, but it also suggests that the low-predictability dynamics of moist convection reduces the determinism of the effects of dust on timescales of TC development (days). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404771300002 |
WOS关键词 | SAHARAN AIR LAYER ; AEROSOL OPTICAL DEPTH ; MINERAL DUST ; NUMERICAL SIMULATIONS ; ABSORBING AEROSOLS ; CLIMATE RESPONSE ; CYCLONE ACTIVITY ; HEATING RATES ; GOCART MODEL ; NORTH-AFRICA |
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/21664 |
专题 | 地球科学 |
作者单位 | 1.Natl Ctr Atmospher Res, Mesoscale & Microscale Meteorol Lab, Boulder, CO 80301 USA; 2.China Meteorol Adm, Inst Urban Meteorol, Beijing 100089, Peoples R China; 3.Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA |
推荐引用方式 GB/T 7714 | Chen, Dan,Liu, Zhiquan,Davis, Chris,et al. Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(12). |
APA | Chen, Dan,Liu, Zhiquan,Davis, Chris,&Gu, Yu.(2017).Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(12). |
MLA | Chen, Dan,et al."Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.12(2017). |
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