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中国农学通报 ›› 2015, Vol. 31 ›› Issue (31): 262-267.doi: 10.11924/j.issn.1000-6850.casb15050094

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

长江源区高寒湿地辐射变化特征

张海宏   

  1. 青海省气象科学研究所
  • 收稿日期:2015-05-18 修回日期:2015-06-05 接受日期:2015-06-23 出版日期:2015-11-16 发布日期:2015-11-16
  • 通讯作者: 张海宏
  • 基金资助:
    国家自然科学基金“三江源典型湿地水平衡模型及生态需水研究”(41065007)

Radiation Change Features at Alpine Wet Land in Source Region of the Yangtze River

  • Received:2015-05-18 Revised:2015-06-05 Accepted:2015-06-23 Online:2015-11-16 Published:2015-11-16

摘要: 为了研究长江源区辐射变化特征,利用长江源玉树隆宝湿地的观测资料,分析该地区各季节总辐射、地表反射辐射、大气逆辐射、地表长波辐射、净辐射和光合有效辐射的变化特征。结果表明:玉树隆宝地区总辐射全年累积量为6488 MJ/(m2 · a)。晴空指数年平均值0.755。地表反射辐射冬季最高,秋季最低。地表反照率冬季高,夏季低,地表反照率年平均值0.27。大气逆辐射和地表长波辐射在夏季高于冬季。大气逆辐射全年累积量为8612 MJ/(m2 ·a),地表长波辐射全年累积量为9420 MJ/(m2 ·a)。冬季净辐射的日变化幅度小,夏季净辐射的日变化幅度大,净辐射全年累积量为2647 MJ/(m2 ·a)。光合有效辐射年总量为13281 mol/m2,光合有效辐射因子年平均值为1.92 mol/MJ。

关键词: 水肥耦合, 水肥耦合, 夏玉米, 叶面指数, 生物量

Abstract: In order to research the radiation change features in the source region of the Yangtze River, using observed data from Longbao and Yushu in the source region of the Yangtze River, change features of global radiation, upward shortwave radiation, downward long wave radiation, upward long wave radiation, net radiation and photo- synthetically active radiation (PAR) were analyzed. The results showed that annual cumulant of global radiation was 6488 MJ/(m2 · a). Annual average clearness index was 0.755. Upward shortwave radiation was the highest in winter and the lowest in autumn. Albedo was high in winter and low in summer and annual average albedo was 0.27. Downward long wave radiation was higher in summer than that in winter. Annual cumulant of downward long wave radiation was 8612 MJ/(m2 ·a). Annual cumulant of upward long wave radiation was 9420 MJ/(m2·a). Daily change range of net radiation was high in summer and low in winter. Annual cumulant of net radiation was 2647 MJ/(m2 ·a). Annual cumulant of PAR was 13281 mol/m2. Annual average ratio of PAR to global radiation was 1.92 mol/MJ.

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