CollectHomepage AdvertisementContact usMessage

Arid Land Geography ›› 2024, Vol. 47 ›› Issue (12): 1991-2004.doi: 10.12118/j.issn.1000-6060.2024.046

• Biology and Environment • Previous Articles     Next Articles

Radiation expenditure characteristics of oasis farmland in Shihezi reclamation area

ZHANG Hongwei1,2,3,4(), HE Qing4(), YANG Mingfeng2, AN Dongliang2,3, WU Chunxia2,3, WANG Jin2,3, CHEN Feifan1,2,3,4   

  1. 1. College of Ecology and the Environment, Xinjiang University, Urumqi 830046, Xinjiang, China
    2. Wulanwusu Special Test Field base of National Integrated Meteorological Observation/Wulanwusu Ecology and Agrometeorology Observation and Research Station of Xinjiang/Wulanwusu Agrometeorological Experiment Station, Shawan 832199, Xinjiang, China
    3. Shihezi Meteorological Bureau, Shihezi 832000, Xinjiang, China
    4. Institute of Desert Meteorological, China Meteorological Administration/National Observation and Research Station of Desert Meteorological, Taklimakan Desert of Xinjiang/Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration/Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi 830002, Xinjiang, China
  • Received:2024-01-22 Revised:2024-03-12 Online:2024-12-25 Published:2025-01-02
  • Contact: HE Qing E-mail:ersan@stu.xju.edu.cn;qinghe@idm.cn

Abstract:

Oasis farmland is a unique ecosystem in arid and semi-arid regions, making the study of energy balance and climate formation mechanisms highly significant. Using observational data from oasis farmland in the Shihezi reclamation area, Xinjiang, China collected between April 2021 and March 2022, this study analyzed the variation characteristics of radiation components and surface albedo in oasis subpads. It compared the radiation components over different crop types (cotton and corn) and performed a differential analysis with bare land in the same area. The results indicate the following: (1) The daily means of downward shortwave and longwave radiation, upward longwave radiation, and net radiation on the underlying surface of oasis farmland were higher during the growth period than during the non-growth period. Upward shortwave radiation was maximal in winter, exhibiting the largest amplitude changes during this season. (2) Within the same area, oasis farmland under different crop types exhibited variations in radiation components during the plant growth and development phases. The daily average maximum differences in upward shortwave radiation, longwave radiation, and net radiation were 33.74 W·m-2, 54.82 W·m-2, and 65.98 W·m-2, respectively. The difference in net radiation between farmland with crops and bare land was particularly pronounced, with a lag effect of approximately 1 hour in the daily peak radiation time for farmland compared to bare land. (3) The annual net radiation exposure of bare land differed by 1147.8 MJ·m-2 compared to cotton fields and by 1519.7 MJ·m-2 compared to corn fields. (4) The surface albedo of bare land, cotton fields, and corn fields was highest in winter, with annual averages of 0.34, 0.23, and 0.25, respectively. The annual average surface albedo of bare land exceeded that of farmland with crops, with a maximum difference of 0.11. Rainfall events reduced surface albedo, while snowfall increased it.

Key words: oasis farmland underlying surface, surface radiation expenditure, surface albedo, Shihezi reclamation area