草地学报

›› 2001, Vol. 9 ›› Issue (1): 58-63.DOI: 10.11733/j.issn.1007-0435.2001.01.010

• 研究论文 • 上一篇    下一篇

海北高寒草甸植被在生长期辐射能量收支探讨

李英年   

  1. 中国科学院西北高原生物研究所, 西宁81001
  • 收稿日期:1999-12-15 修回日期:2000-08-17 出版日期:2001-02-15 发布日期:2001-02-15
  • 作者简介:李英年,男,汉族,1962年9月出生,副研究员,主要从事生物气象研究工作,发表论文40余篇
  • 基金资助:
    国家与中科院“九五”重大项目及特别支持项目(1998040800;KZ951-A1-204;KZ951-A1-301;KZ95T-04;KZ95T-06);中国生态系

The Study on the Radiant Energy Budget of Alpine Meadow Vegetation in the Sunny Days During the Plant Growing Season

LI Ying-nian   

  1. Northwest Plateau Institute of Biology, the Chinese Academy of Sciences, Xining 810001
  • Received:1999-12-15 Revised:2000-08-17 Online:2001-02-15 Published:2001-02-15

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摘要： 在晴天,海北高寒草甸植被辐射的各收支项均有明显的日变化规律,在中午13～14h最大。地表净辐射通量日变化在-158～499W·m-2,8～9h到18h地表面净得到热量,地表处于吸热阶段,18h～翌晨8h区域净损失热量。反射率在早晨与傍晚最高,13h左右最低。植物生长季的4～9月,中午反射率约在0.20～0.22,早晨与傍晚在0.24～0.49,不同季节的3d日平均反射率为0.25,11h～15h平均为0.21。

关键词: 高寒草甸植被, 植物生长期, 辐射能量收支

Abstract: There area obvious daily variation patterns of the radiant budget items of Haibei alpine meadow vegetation in the sunny days.The radiant values reach the maximum during 13;00—14;00.The daily net radiant flux of soil surface is varied from 158W·m-2 ·min-1 to 499W·m-2 ·min-1 .The soil surface is under the condition of absorbing heat from 8;00 or 9;00 to 18;00,whereas the heat is out from soil surface from 18;00 to 8;00 of the next morning.Higher in the morning or the evening,the albedo is the lowest at 13;00 more or less during the whole day,however.The September;They are from 0.197 to 0.215 at noon;and from 0.239 to 0.485 in the morning or the evening;and 0.251 during 3 days in different season and 0.214 from 11;00 to 15;00.

Key words: Alpine meadow vegetation, Plant growing season, Radiant energy budget

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