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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (5): 116-128.DOI: 10.7522/j.issn.1000-694X.2023.00041

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Radiation balance characteristics of the ecological transition zone in the southern margin of the Taklamakan Desert

Guangxiang Fu1,2(), Qing He2(), Guosheng Wang1,2, Mingjie Ma1,2, Lulu Yin1,2, Qian Zhang3, Wei Tian3   

  1. 1.College of Geography Science and Tourism,Xinjiang Normal University,Urumqi 830054,China
    2.National Observation and Research Station of Taklamakan Desert Meteorology of Xinjiang / Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration / Xinjiang Key Laboratory of Desert Meteorology and Sandstorm,Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China
    3.Minfeng County Meteorological Bureau,Minfeng 848599,Xinjiang,China
  • Received:2023-02-22 Revised:2023-04-12 Online:2023-09-20 Published:2023-09-27
  • Contact: Qing He

Abstract:

The southern edge of the Taklamakan Desert belongs to the ecological transition zone area, the surface properties vary greatly in time and space, and the land surface radiation balance and surface albedo characteristics are special, and the current understanding of this aspect is not sufficient, so it is necessary to carry out the study of the radiation balance of the southern margin of the Taklamakan Desert. This paper analyzes the radiation balance and surface albedo characteristics of the region at different time scales and under different weather conditions by using the surface radiation data from December 2019 to November 2020 from the land-gas interaction observatory on the northern side of the Qinghai-Tibet Plateau. The results showed that: (1) The monthly mean daily variation of each radiation component in different months was unimodal type, but the extreme value size and occurrence time were different. The seasonal variation of the monthly exposure of each radiation component was obvious, and the downward shortwave radiation was manifested as spring> autumn> summer > winter. Upward shortwave radiation is spring> summer> autumn > winter. (2) The downward and upward short-wave radiation is the largest in spring and the smallest in winter in terms of seasonal variation, and the remaining radiation components are the largest in summer and the smallest in winter. (3) In typical weather, except for the smooth daily variation curve of each radiation component on sunny days, the radiation components change irregularly in cloudy, precipitation, floating dust, sand and sandstorm weather, among which precipitation and sandstorms have the most obvious influence on downward short-wave radiation. (4) The monthly changes of surface albedo were irregular, and the maximum and minimum monthly averages occurred in March and May, respectively, 0.37 and 0.29, and the annual average was 0.31. (5) Under different precipitation processes, the daily change of each radiation component on a sunny day is a standard inverted "U" shape, and the change of each radiation component under rainfall and snowfall is irregular, and the response of surface albedo to rainfall and snowfall corresponds to weakening and strengthening, respectively.

Key words: Taklamakan Desert, ecological transition zones, radiation balance, typical weather, surface albedo

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