Influence of atmospheric relative humidity on ultraviolet flux and aerosol direct radiative forcing: Observation and simulation

被引:6
作者
Xia, Dong [1 ]
Chen, Ling [1 ]
Chen, Huizhong [1 ]
Luo, Xuyu [1 ]
Deng, Tao [2 ]
机构
[1] Dongguan Meteorol Bur, Dongguan, Peoples R China
[2] CMA, Inst Trop & Marine Meteorol, 6 Fujin Rd, Guangzhou 610000, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Ultraviolet flux; aerosol direct radiative forcing; relative humidity; SURFACE BOUNDARY-LAYER; PEARL RIVER-DELTA; MODEL-CALCULATIONS; OPTICAL-PROPERTIES; IRRADIANCE; URBAN; HIMALAYAS;
D O I
10.1007/s13143-016-0003-2
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The atmospheric aerosols can absorb moisture from the environment due to their hydrophilicity and thus affect atmospheric radiation fluxes. In this article, the ultraviolet radiation and relative humidity (RH) data from ground observations and a radiative transfer model were used to examine the influence of RH on ultraviolet radiation flux and aerosol direct radiative forcing under the clear-sky conditions. The results show that RH has a significant influence on ultraviolet radiation because of aerosol hygroscopicity. The relationship between attenuation rate and RH can be fitted logarithmically and all of the R-2 of the 4 sets of samples are high, i.e. 0.87, 0.96, 0.9, and 0.9, respectively. When the RH is 60%, 70%, 80% and 90%, the mean aerosol direct radiative forcing in ultraviolet is -4.22W m(-2), -4.5W m(-2), -4.82W m(-2) and -5.4W m(-2), respectively. For the selected polluted air samples the growth factor for computing aerosol direct radiative forcing in the ultraviolet for the RH of 80% varies from 1.19 to 1.53, with an average of 1.31.
引用
收藏
页码:341 / 352
页数:12
相关论文
共 34 条
[1]   Optical properties and chemical composition of the atmospheric aerosol in urban Guangzhou, China [J].
Andreae, Meinrat O. ;
Schmid, Otmar ;
Yang, Hong ;
Chand, Duli ;
Yu, Jian Zhen ;
Zeng, Li-Min ;
Zhang, Yuan-Hang .
ATMOSPHERIC ENVIRONMENT, 2008, 42 (25) :6335-6350
[2]   Stratospheric ozone, ultraviolet radiation, and cryptogams [J].
Bjorn, Lars Olof .
BIOLOGICAL CONSERVATION, 2007, 135 (03) :326-333
[3]   Ultraviolet radiation albedo of natural surfaces [J].
Chadysiene, Renata ;
Girgzdys, Aloyzas .
JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT, 2008, 16 (02) :83-88
[4]  
Chen Hui-zhong, 2013, China Environmental Science, V33, P605
[5]   Relative humidity dependence of aerosol optical properties and direct radiative forcing in the surface boundary layer at Xinken in Pearl River Delta of China:: An observation based numerical study [J].
Cheng, Y. F. ;
Wiedensohler, A. ;
Eichler, H. ;
Heintzenberg, J. ;
Tesche, M. ;
Ansmann, A. ;
Wendisch, M. ;
Su, H. ;
Althausen, D. ;
Herrmann, H. ;
Gnauk, T. ;
Brueggemann, E. ;
Hu, M. ;
Zhang, Y. H. .
ATMOSPHERIC ENVIRONMENT, 2008, 42 (25) :6373-6397
[6]  
Deng Tao, 2013, China Environmental Science, V33, P1921
[7]   Attenuation of ultraviolet radiation reaching the surface due to atmospheric aerosols in Guangzhou [J].
Deng XueJiao ;
Zhou XiuJi ;
Tie XueXi ;
Wu Dui ;
Li Fei ;
Tan HaoBo ;
Deng Tao .
CHINESE SCIENCE BULLETIN, 2012, 57 (21) :2759-2766
[8]   An assessment of hygroscopic growth factors for aerosols in the surface boundary layer for computing direct radiative forcing [J].
Im, JS ;
Saxena, VK ;
Wenny, BN .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2001, 106 (D17) :20213-20224
[9]   A satellite view of aerosols in the climate system [J].
Kaufman, YJ ;
Tanré, D ;
Boucher, O .
NATURE, 2002, 419 (6903) :215-223
[10]  
Kim J, 2006, ATMOS ENVIRON, V40, P4328