GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-17-0819.1
Simulated Dust Aerosol Impacts on Western Sahelian Rainfall: Importance of Ocean Coupling
Jordan, Asha K.; Gnanadesikan, Anand; Zaitchik, Benjamin
2018-11-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:22页码:9107-9124
文章类型Article
语种英语
国家USA
英文摘要

North Africa is the world's largest source of mineral dust, and this dust has potentially significant impacts on precipitation. Yet there is no consensus in published studies regarding the sign or magnitude of dust impacts on rainfall in either the highly climate-sensitive Sahel region of North Africa or the neighboring tropical Atlantic Ocean. Here the Geophysical Fluid Dynamics Laboratory (GFDL) Climate Model 2 (GFDL CM2.0) with Modular Ocean Model, version 4.1 (MOM4.1), run at coarse resolution (CM2Mc) is applied to investigate one poorly characterized aspect of dust-precipitation dynamics: the importance of sea surface temperature (SST) changes in mediating the atmospheric response to dust. Two model experiments were performed: one comparing Dust-On to Dust-Off simulations in the absence of ocean-atmosphere coupling, and the second comparing Dust-On to Dust-Off with the ocean fully coupled. Results indicate that SST changes in the coupled experiment reduce the magnitude of dust impacts on Sahel rainfall and flip the sign of the precipitation response over the nearby ocean. Over the Sahel, CM2Mc simulates a net positive impact of dust on monsoon season rainfall, but ocean-atmosphere coupling in the presence of dust decreases the inflow of water vapor, reducing the amount by which dust enhances rainfall. Over the tropical Atlantic Ocean, dust leads to SST cooling in the coupled experiment, resulting in increased static stability that overrides the warming-induced increase in convection observed in the uncoupled experiment and yields a net negative impact of dust on precipitation. These model results highlight the potential importance of SST changes in dust-precipitation dynamics in North Africa and neighboring regions.


英文关键词Africa Large-scale motions Monsoons Atmosphere-ocean interaction Climate models Aerosol radiative effect
领域气候变化
收录类别SCI-E
WOS记录号WOS:000447530600001
WOS关键词3-DIMENSIONAL STRUCTURE ; CLIMATE MODELS ; MINERAL DUST ; PART II ; SEA ; PRECIPITATION ; RESPONSES ; DYNAMICS ; AFRICA ; CIRCULATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向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/19862
专题气候变化
作者单位Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA
推荐引用方式
GB/T 7714
Jordan, Asha K.,Gnanadesikan, Anand,Zaitchik, Benjamin. Simulated Dust Aerosol Impacts on Western Sahelian Rainfall: Importance of Ocean Coupling[J]. JOURNAL OF CLIMATE,2018,31(22):9107-9124.
APA Jordan, Asha K.,Gnanadesikan, Anand,&Zaitchik, Benjamin.(2018).Simulated Dust Aerosol Impacts on Western Sahelian Rainfall: Importance of Ocean Coupling.JOURNAL OF CLIMATE,31(22),9107-9124.
MLA Jordan, Asha K.,et al."Simulated Dust Aerosol Impacts on Western Sahelian Rainfall: Importance of Ocean Coupling".JOURNAL OF CLIMATE 31.22(2018):9107-9124.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jordan, Asha K.]的文章
[Gnanadesikan, Anand]的文章
[Zaitchik, Benjamin]的文章
百度学术
百度学术中相似的文章
[Jordan, Asha K.]的文章
[Gnanadesikan, Anand]的文章
[Zaitchik, Benjamin]的文章
必应学术
必应学术中相似的文章
[Jordan, Asha K.]的文章
[Gnanadesikan, Anand]的文章
[Zaitchik, Benjamin]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。