Arid
DOI10.1029/2011JD017370
An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)
Hansell, Richard A.1,2; Tsay, Si-Chee2; Hsu, N. Christina2; Ji, Qiang1,2; Bell, Shaun W.2,3; Holben, Brent N.2; Welton, Ellsworth J.2; Roush, Ted L.4; Zhang, W.5; Huang, J.5; Li, Zhanqing1,6; Chen, H.7
通讯作者Hansell, Richard A.
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2012
卷号117
英文摘要

In April-June 2008, NASA Goddard’s ground-based mobile laboratories (SMART-COMMIT) were deployed to Zhangye China (39.0 degrees N; 101 degrees W) to support the Asian Monsoon Years field experiment and the East Asian Study of Tropospheric Aerosols and Impact on Regional Climate. One of the primary objectives at Zhangye, a semi-arid region located between the Taklimakan and Gobi Deserts, was to capture and characterize dust aerosols near the source and to quantify their direct radiative effects (DRE). A regional dust optical model was constructed by combining previously measured soil mineralogy data at Zhangye with COMMIT’s particle microphysical measurements. During a 2-week period of heightened dust activity, retrieved longwave (LW) aerosol optical thickness (tau) from SMART’s Atmospheric Emitted Radiance Interferometer was used in the Fu-Liou radiative transfer model to derive LW instantaneous DRE (DRELW) at the surface, top of atmosphere, and heating rate profiles for cloud-free conditions. Conservatively, surface instantaneous DRELW and LW forcing efficiency range from about 2-20 Wm(-2) and 31-35 Wm(-2)tau(-1) (0 <= tau <= 83), respectively. The significance of DRELW relative to its shortwave counterpart was estimated to be between 51 and 58%, but of opposite sign, partly compensating shortwave surface cooling. Compared to Saharan dust observed during the NAMMA-2006 field experiment at Cape Verde, dust LW forcing efficiency for this study was found to be a factor of two larger stemming from differences in environmental and surface conditions, aerosol absorption, and Zhangye’s close proximity to major desert sources. Relative to observed and modeled ranges in surface DRELW for clouds (similar to 30-80 Wm(-2)) and greenhouse gases (similar to 2 Wm(-2)), this study’s upper range in DRELW represents a significant perturbation to the climate system with important implications for better understanding regional changes in surface temperatures and moisture budgets.


类型Article
语种英语
国家USA ; Peoples R China
收录类别SCI-E
WOS记录号WOS:000306237000002
WOS关键词OPTICAL-CONSTANTS ; AEROSOLS ; TEMPERATURE ; MINERALS ; SAHARA ; IMPACT
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构兰州大学 ; 中国科学院大气物理研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/173609
作者单位1.Univ Maryland, ESSIC, College Pk, MD 20740 USA;
2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA;
3.Sci Syst & Applicat Inc, Lanham, MD USA;
4.NASA, Ames Res Ctr, Moffett Field, CA 94035 USA;
5.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China;
6.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20740 USA;
7.Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Hansell, Richard A.,Tsay, Si-Chee,Hsu, N. Christina,et al. An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)[J]. 兰州大学, 中国科学院大气物理研究所,2012,117.
APA Hansell, Richard A..,Tsay, Si-Chee.,Hsu, N. Christina.,Ji, Qiang.,Bell, Shaun W..,...&Chen, H..(2012).An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008).JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,117.
MLA Hansell, Richard A.,et al."An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 117(2012).
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