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• THE RELATIONSHIP BETWEEN THE RADIATION AND CLIMATE IN QINGHAI-XIZANG PLATEAU REGIONS DURING AUGUST 1982 TO JULY 1983
• Ji Guoliang
• 1985 Vol. 4 (s2): 10-20. 
• Abstract ( ) PDF (729KB) ( )
• The characteristics of the solar radiation in Qinghai-Xizang Plateau regions during August 1982 to July 1983 are clarified by using the observed data of the solar radiation on Qinghai-Xizang Plateau during above period. They are as follows:(1) The global radiation is strong and it will effect on the seasonal variation of the atmospheric circulation.(2) The variation of the surface albedo has concern with the nature and intensity of the precipitation, surface vegetation and so on. In winter the albedo is large and in summer the albedo is small, the seasonal variation is clear.(3) The effective radiation on the plateau is larger than the plain and the annual total on the plateau close to the value of the tropical desert.(4) The net radiation on the plateau is smaller and the plateau region is one of the regions where there is a low value of the net radiation.(5) The surface heating fields act as heat sink during some period in winter on the middle part and northern part of the plateau, the heating fields act as heat source on rest regions and during another season.(6) The solar ultraviolet on the plateau is very strong, the annual total is more than 63 kalocal/cm ², the ratio of the solar ultraviolet to the global radiation is about 4.0% and the instantaneous maximum reachs to 0.100 cal/cm ².min.

• THE GENERAL CIRCULATION AND WEATHER OVER QINGHAI-XIZANG PLATEAU AND NEIGHBOURHOOD FROM AUGUST 1982 TO JULY 1983
• Gu Zhang;Wang Keli
• 1985 Vol. 4 (s2): 21-35. 
• Abstract ( ) PDF (908KB) ( )
• In this paper we divide the observational year of heat sources into five period over Qinghai-Xizang Plateau from August 1982 to July 1983. The weather event for each period is as follows:the hot and less rain over Qingzang Plateau during July and August 1982; the more rain in autumn over western China, but less rain over southern part of Xizang from September to November 1982; the more snow and colder winter over Qinghai-Xizang Plateau from December 1982 to February 1983;the more rain over southern and eastern part of Xizang and also more rain over Southern and Northern China, from March to May 1983; the most dry season since 1949 over Xizang and the secondary intensity of flood over Yangtse River region since 1949 from June to August 1983. The general circulation and its anomaly, which connect with above weather anomaly, are discussed. Specially, the anomaly of position and intensity for the synoptic system over Qinghai-Xizang Plateau, the Subtropical Higt over Western Pacific and the polar vortex(or Polar Anticyc-clone) are discussed. It is pointed out that this year is the one of the years when the El Niño phenomenon is very strong.

• THE CHARACTERISTICS OF THE RADIATION OVER THE GERZE REGION IN THE QINGHAI-XIZANG PLATEAU
• Yuan Fumao
• 1985 Vol. 4 (s2): 36-49. 
• Abstract ( ) PDF (958KB) ( )
• In this paper, based on the data of the surface radiation balance observed at Gerze of the western Qinghai-Xizang Plateau from August 1982 to July 1983, the characteristics of the surface radiation balance and its components and the affecting factors in the region are analysed. The annual characteristics of the radiation conditions are shown preliminary. Lastly, the surface heat source/sink are discussed briefly.

• THE CHARACTERISTICS OF SURFACE RADIATION AND ITS ANNUAL VARIATION IN NAGQU AREA OF QINGHAf-XIZANG PLATEAU
• Chen Youyu;Yao Lanchang;Wang Wenhua
• 1985 Vol. 4 (s2): 50-66. 
• Abstract ( ) PDF (1192KB) ( )
• The characteristics and seasonal variation of all the solar radiation components are analysed by using the observational data of radiation balance in Nagqu from August 1S82 t〇 July 1983. Some important facts the variation of the radiation components and their climatological characteristics are also given. Finally, the conditions of heat source and heat sink on the surface of this region are discussed.

• A STUDY OF THE RADIATION PROPERTIES AT LHASA
• Jiag Hao;Ji Guoliang;Wang Jun
• 1985 Vol. 4 (s2): 67-79. 
• Abstract ( ) PDF (860KB) ( )
• In this paper, the climatological characteristics each component of the terrestrial radiation balance and the correlations between the radiation component and other meteorological elements at Lhasa station in the period of the Qinghai-Xizang Plateau experiment(1982-1983) are analysed. At Lhasa station:it was 180.67×10 ³ cal/cm ²·year in annual total of direct solar radiation reacned the plane that is perpendicular to solar ray.The main components of attenuation of solar radiation in atmosphere were molecular scatter and ozone absorption in winter but there were significant absorption by aerosols in other seasons. It was 57.90×10 ³ cal/cm ²·year in annual total of scatter radiation that was related to daytime cloud cover. It was 175.47×10 ³ cal/cm ²·year in annual total of short-wave solar radiation, and 67% of it was annual total of direct solar radiation reached level.It was 22% in annual mean surface albedo. It was 74.22×10 ³ cal/cm ²·year in annual total of effective radiation.It was 62.34×10 ³ cal/cm ²·year in annual total of net radiation. Each monthly totals of net radiation were all plus, and their seasonal variation was distinct. The seasonal variation of the value that is the ratio of plus component to negative component in the dekad total of net radiation was related to the seasonal variation of atmospheric circulation system over the Qinghai-Xizang Plateau.

• THE CHARACTERISTICS OF THE RADIATION BALANCE IN GARZE OVER THE EASTERN PART OF QINGHAI-XIZANG PLATEAU
• Yang Huayi;Shui Dengchao
• 1985 Vol. 4 (s2): 80-93. 
• Abstract ( ) PDF (949KB) ( )
• The characteristics of the diurnal and seasonal variation for the components of radiation balance are analysed by using the observational data obtained in Garze from August 1982 to July 1983. Their characteristics are also compared with the characteristics of radiation in the middle and western part of the plateau. The radiation characteristics in Garze area are consistent with the conditions of the nature and climate in the eastern part of the plateau.

• THE CHARACTERISTICS OF SOLAR RADIATION IN THE THREE-RIVER VALLEY, THE NORTHERN TIBETAN PLATEAU AND THE HIMALAYAS MOUNTAIN AREA OVER THE QINGHAI-XIZANG PLATEAU
• Yao Lanchang;Jing Fengrong;Chen Youyu;Wang Wenhua
• 1985 Vol. 4 (s2): 94-111. 
• Abstract ( ) PDF (1333KB) ( )
• The climatic features of radiation in the different climatic regions and underlying surfaces are analysed by using the short-period at Chengdu, Baingoin, Lhunze, Tingri, Pagri, Zayu.It is shown that there are obvious differences in radiative characteristics and the geographic distribution and intensity of the heat sources and sinks among the three-river valley the northern Tibetan Plateau and Himalayas Mountain area.

• THE CHARACTERISTICS OF THE SOLAR ULTRAVIOLET OVER THE QINGHAI-XIZANG PLATEAU
• Ji Guoliang;Chen Youyu
• 1985 Vol. 4 (s2): 112-121. 
• Abstract ( ) PDF (675KB) ( )
• The daily and seasonal variation characteristics of the solar ultraviolet at Lhasa and Nagqu are analysed by using the observational data of the solar ultraviolet over the Qinghai-Xizang Plateau during August 1982 to July 1983.The results are as follows:The solar ultraviolet on the Plateau is very strong, the annual total is more than 63 kilocal·cm ^-2.The ratio of the solar ultraviolet to the global radiation is about 4.0-4.1%. This ratio is about 4.8-4.9% for cloud sky,and it is larger than the ratio in clear sky. The seasonal variation of the solar ultraviolet is very outstanding, in summer the total is more, than 1/3 of the yearly total and in winter the solar ultraviolet is weaker than another season, the total is only 17% of the yearly total.The radiant flux of the solar ultraviolet on the Plateau is 1.3 times as large as MoHe on the plain in the north-eastern part of China.The instantaneous maximum of the solar ultraviolet reaches to 0.100 cal·cm ^-2·min ^-1.

• THE CHARACTERISTICS OF TRANSPARENCY OF ATMOSPHERE ON THE MAIN PART OF QINGHAI-XIZANG PLATEAU
• Ji Guoliang
• 1985 Vol. 4 (s2): 122-129. 
• Abstract ( ) PDF (548KB) ( )
• By analysing the data of atmospheric transmission coefficients on the main part of Qinghai-Xi/ang Plateau from August 1982 to July 1983, it is found that the characteristics of transparency of atmosphere on the main part of Qinghai-Xizang Plateau are as follows:(1) The seasonal variation of transparency of atmosphere is quite clear.It is very well in winter and it is had in summer.it is also not well during transitional season.(2) The daily variation of transparency of atmosphere is simple single-peak type in winter.In summer, it is also single-peak type on the middle part, it is "V" type on western part,and it is probably double-peaks type on the eastern part of the plateau.(3) Through the year, the western part of the plateau is the crea of high value for the atmospheric transmission coefficients and the areas of low value are on the Chaidamu Basin and Hengduan mountain areas.