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 - 15 8～ 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 .2 0～ 0 .2 2 ,早晨与傍晚在0 .2 4～ 0 .49,不同季节的 3d日平均反射率为 0 .2 5 ,11h～ 15 h平均为 0 .2
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.
出处
《草地学报》
CAS
CSCD
2001年第1期58-63,共6页
Acta Agrestia Sinica
基金
国家与中科院"九五"重大项目及特别支持项目!( 19980 40 80 0
KZ95 1-A1-2 0 4
KZ95 1-A1-3 0 1
KZ95 T-0 4
KZ95 T-0 6)
中国生态系
