标題：Long-term variations of ultraviolet radiation in Tibetan Plateau from observation and estimation作者：Peng, Simao; Du, Qingyun; Wang, Lunche; Lin, Aiwen; Hu, Bo

來源出版物：INTERNATIONAL JOURNAL OF CLIMATOLOGY 卷：35 期：7 頁：1245-1253 DOI：10.1002/joc.4051出版年：JUN 15 2015

摘要：Measurements of ultraviolet radiation (UV) and global solar radiation (G) in Lhasa, Tibetan Plateau, from 2006 to 2012 were used to investigate their seasonal characteristics. The maximum UV irradiation and UV fraction (percentage of UV compared to G, F-UV) occurred at noon in summer (July) and the minimum values occurred in winter (December); the annual means of UV and F-UV were approximately 0.91 MJ m(-2) day(-1) and 4.3%, respectively. By analysing the dependence of UV irradiances on clearness index (Kt) and cosine of the solar zenith angle, an efficient all-sky model was developed for estimating UV radiation in Tibetan Plateau. The model was tested at Sanjiang and Donghu stations and produced satisfactory estimates. UV dataset was then reconstructed from G using the newly developed model for the period 1961-2012. It was discovered that annual mean daily UV irradiation was approximately 0.89 MJ m(-2) day(-1) and there was a significant decreasing trend (at the rate of 0.013 MJ m(-2) decade(-1)) over the last 50 years in the Tibetan Plateau. The largest decrease occurred in autumn (-0.023 MJ m(-2) decade(-1)) and a small decrease observed in summer. Meanwhile, results also revealed that UV radiation increased at 0.05 MJ m(-2) year(-1) from 1989 to 2012, which was inconsistent with the variations of G in the study area. The proposed all-weather UV model is very important for ecological modelling, atmospheric environment, agricultural processes and solar energy applications in the Tibetan Plateau, China.

入藏号：WOS:000355953600005

文獻類型：Article

語種：English

作者關鍵詞：UV radiation, global solar radiation, sky conditions, clearness index, Tibetan Plateau

擴展關鍵詞：GLOBAL SOLAR-RADIATION; UV-B RADIATION; CHINA; TROPICS; QUALITY; SURFACE; CLOUDS; LHASA; SKY

通訊作者地址：Du, Qingyun; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079,Hubei Province, Peoples R China.

電子郵件地址：qydu@whu.edu.cn

地址：

[Peng, Simao; Du, Qingyun; Lin, Aiwen] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079,Hubei Province, Peoples R China.

[Wang, Lunche] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei Province, Peoples R China.

[Hu, Bo] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China.

研究方向：Meteorology & Atmospheric Sciences

ISSN：0899-8418

eISSN: 1097-0088