To investigate the seasonal variation of aerosol optical depth(AOD), extinction coefcient(EXT), single scattering albedo(SSA) and the decomposed impacts from sulfate(SO4 2) and black carbon(BC) over China, numerical experiments are conducted from November 2007 to December 2008 by using WRF-Chem. Comparison of model results with measurements shows that model can reproduce the spatial distribution and seasonal variation of AOD and SSA. Over south China, AOD is largest in spring(0.6–1.2) and lowest in summer(0.2–0.6). Over north, northeast and east China, AOD is highest in summer while lowest in winter. The high value of EXT under 850 hPa which is the reflection of low visibility ranges from 0.4–0.8 km 1and the high value area shifts to north during winter, spring and summer, then back to south in autumn. SSA is 0.92–0.94 in winter and 0.94–0.96 for the other three seasons because of highest BC concentration in winter over south China. Over east China, SSA is highest(0.92–0.96) in summer, and 0.88–0.92 during winter, spring and autumn as the concentration of scattering aerosol is highest while BC concentration is lowest in summer over this region. Over north China, SSA is highest(0.9–0.94) in summer and lowest(0.82–0.86) in winter due to the significant variation of aerosol concentration. The SO4 2 induced EXT increases about 5%– 55% and the impacts of BC on EXT is much smaller(2%–10%). The SO4 2-induced increase in SSA is 0.01–0.08 and the BC-induced SSA decreases 0.02–0.18.
展开▼
机译:Yi-bing Fang方—兵,Zhongri jindai gangtie jishushi bijiao yanjiu: 1868-1933中日近代钢铁技术史比较研究: 1868-1933 [The History of Iron and Steel Technology in Modern China and Japan, 1868-1933: A Comparative Study] China: Shandong Education Press, 2013. 283 pp. RMB ¥ 50.
机译:Intra- and Inter-annual Variation of Soil Microbial and Enzymatic Response to Water and Nitrogen Addition in a Chinese Semi-arid SteppeAU Sun, Liangjie Dong, Yunshe Qi, Yuchun (qiyc@igsnrr.ac.cn) He, Yating Peng, Qin Liu, Xinchao Jia, Junqiang Guo, Shufang Cao, Congcong
机译:A Study of Substitution the Element of (La+3) on the Structural and Electrical Properties of the Compound Ferrite (垂势沁.汾没揃抽沁.汾没杉制沁.没遂椙栖水裾汾竏挺摄?锤汳)
机译:A Sanskrit-Chinese Collation Study of the Larger Sukhāvatīvyūha Sūtra Grammar under the Framework of Chinese Historical Linguistics—A Case of the Chinese Translations of Sanskrit Instrumental, Ablative and Locative Nouns =汉语历史语言学框架中的《无量寿经》语法梵汉对勘研究——以梵语名词工