Observational evidence of changes in water vapor, clouds, and radiation at the ARM SGP site

被引:8
作者
Dong, Xiquan [1 ]
Xi, Baike
Minnis, Patrick
机构
[1] Univ N Dakota, Dept Atmospher Sci, Grand Forks, ND 58201 USA
[2] NASA, Langley Res Ctr, Hampton, VA 23681 USA
关键词
D O I
10.1029/2006GL027132
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Characterizing water vapor and cloud effects on the surface radiation budget is critical for understanding the current climate because water vapor is the most important greenhouse gas in the atmosphere and clouds are one of the largest sources of uncertainty in predicting potential future climate change. Several studies have shown that insolation over land declined until 1990 then increased until the present. Using 8 years of data collected at the ARM Southern Great Plains (SGP) surface site, we found that the insolation increased from 1997 to 2000, but significantly decreased from 2001 to 2004, changes that exactly mirror the variation in the second-order fit of cloud fraction. Under clear-sky conditions, the rates of change of water vapor, insolation and downwelling longwave (LW) flux are -0.0166 cm/yr, 0.48 Wm(-2)/yr, and -1.16 Wm(-)2/yr, respectively, indicating that water vapor changes are more important for LW flux than for insolation.
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页数:4
相关论文
共 15 条
[1]  
Clothiaux EE, 2000, J APPL METEOROL, V39, P645, DOI 10.1175/1520-0450(2000)039<0645:ODOCHA>2.0.CO
[2]  
2
[3]   A climatology of midlatitude continental clouds from the ARM SGP central facility. Part II: Cloud fraction and surface radiative forcing [J].
Dong, Xiquan ;
Xi, Baike ;
Minnis, Patrick .
JOURNAL OF CLIMATE, 2006, 19 (09) :1765-1783
[4]   A climatology of midlatitude continental clouds from the ARM SGP Central Facility: Part I: Low-level cloud macrophysical, microphysical, and radiative properties [J].
Dong, XQ ;
Minnis, P ;
Xi, BK .
JOURNAL OF CLIMATE, 2005, 18 (09) :1391-1410
[5]  
Li ZQ, 2001, J ATMOS SCI, V58, P376, DOI 10.1175/1520-0469(2001)058<0376:QUIDSC>2.0.CO
[6]  
2
[7]   A new retrieval for cloud liquid water path using a ground-based microwave radiometer and measurements of cloud temperature [J].
Liljegren, JC ;
Clothiaux, EE ;
Mace, GG ;
Kato, S ;
Dong, XQ .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2001, 106 (D13) :14485-14500
[8]  
Moran KP, 1998, B AM METEOROL SOC, V79, P443, DOI 10.1175/1520-0477(1998)079<0443:AUCPRF>2.0.CO
[9]  
2
[10]   Do satellites detect trends in surface solar radiation? [J].
Pinker, RT ;
Zhang, B ;
Dutton, EG .
SCIENCE, 2005, 308 (5723) :850-854