Variations of the Components of Radiation in Desert Wetland of Dunhuang, China

doi:10.7522/j.issn.1000-694X.2016.00112

JOURNAL OF DESERT RESEARCH ›› 2018, Vol. 38 ›› Issue (1): 172-181.DOI: 10.7522/j.issn.1000-694X.2016.00112

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Variations of the Components of Radiation in Desert Wetland of Dunhuang, China

Yin Daiying^1,2, Qu Jianjun¹, Yu Ye², Zhao Suping², Li Fang¹, Xiao Jianhua¹

1. Dunhuang Gobi and Desert Ecology and Environment Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2016-07-18 Revised:2016-08-23 Online:2018-01-20 Published:2018-01-20

Abstract

Abstract: The characteristics of radiation on the Xihu wetland ecosystem of Dunhuang are analyzed by radiation data from the measurements of observation system in 2013. The results show that the daily variations of the radiation components are different under different weathers. The daily variation curves are smooth on sunny day, but on cloudy day and dust the curves become irregular. The diurnal variations of the radiation flux are unimodal type, but the radiation components volume variances are different and the extremes appear in different times. The seasonal variation characteristics of monthly total downward shortwave radiation, downward long-wave radiation, upward long-wave radiation and net radiation are obvious:the maximum value appears in summer, and the minimum value appears in winter. However, the seasonal variation characteristics of monthly total upward shortwave radiation are not obvious. The daily mean of downward shortwave radiation, upward shortwave radiation downward long-wave radiation, upward long-wave radiation and net radiation has seasonality:the maximum value appears in June or July and the minimum value appears in January or December. The surface albedo in the growing season is lower than in the non-growing season. The diurnal variation of surface albedo is "U" shape, with the maximum value in the morning and evening.

Key words: typical synoptic condition, variation of radiation, surface albedo, lake wetland ecosystem, arid environment

CLC Number:

P422.4

Yin Daiying, Qu Jianjun, Yu Ye, Zhao Suping, Li Fang, Xiao Jianhua. Variations of the Components of Radiation in Desert Wetland of Dunhuang, China[J]. JOURNAL OF DESERT RESEARCH, 2018, 38(1): 172-181.

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Variations of the Components of Radiation in Desert Wetland of Dunhuang, China

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