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| 春季晴天与阴天草原辐射和能量平衡特征的一次对比观测 | |
| 引用本文： | 岳平,牛生杰,张强,刘秀兰.春季晴天与阴天草原辐射和能量平衡特征的一次对比观测[J].中国沙漠,2010,30(6):1464-1468. |
| 作者姓名： | 岳平 牛生杰 张强 刘秀兰 |
| 作者单位： | 1. 中国气象局,兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室/中国气象局,干旱气候变化与减灾重点开放实验室,甘肃,兰州,730020;张掖国家气候观象台,甘肃,张掖,734000 2. 南京信息工程大学,江苏,南京,210044 3. 中国气象局,兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室/中国气象局,干旱气候变化与减灾重点开放实验室,甘肃,兰州,730020 4. 张掖国家气候观象台,甘肃,张掖,734000 |
| 基金项目： | 国家自然科学基金，"973"计划前期专项 |
| 摘 要： | 利用2008年3月锡林浩特国家气候观象台通量观测系统获取的资料,对草原初春晴天和阴天地表能量和辐射平衡特征进行了对比。结果显示,初春典型晴天总辐射、反射辐射、向下和向上长波辐射的最大值分别为801W·m-2、203W·m-2、197W·m-2和390W·m-2;阴天总辐射与反射辐射明显减弱,峰值分别为595W·m-2、147W·m-2,向下、向上长波辐射最大值分别为290W·m-2和182W·m-2。晴天感热、潜热、土壤热通量和净辐射的日积分值分别是6.58MJ·m-2·d-1、1.05MJ·m-2·d-1、-0.25MJ·m-2·d-1和5.89MJ·m-2·d-1,阴天感热、潜热、土壤热通量和净辐射的日积分值分别是1.15MJ·m-2·d-1、0.49MJ·m-2·d-1、-0.08MJ·m-2·d-1和1.65MJ·m-2·d-1。典型晴天地表反照率早晚大,中午最小,最小值为0.26;而阴天受云的影响,最小值仅为0.22,且日变化不明显。 |
| 关 键 词： | 草原 辐射平衡 反射率 |
| 收稿时间： | 2009-11-29 |
| 修稿时间： | 2009-12-4 |
Surface Heat and Radiation Budget over Semi-arid Grassland in a Clear Day and a Cloudy Day during Early Spring |
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| YUE Ping,NIU Sheng-jie,ZHANG Qiang,LIU Xiu-lan.Surface Heat and Radiation Budget over Semi-arid Grassland in a Clear Day and a Cloudy Day during Early Spring[J].Journal of Desert Research,2010,30(6):1464-1468. | |
| Authors: | YUE Ping NIU Sheng-jie ZHANG Qiang LIU Xiu-lan |
| Institution: | 1.Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province/Key Laboratory of Arid Climatic Changing and Reducing Disaster of CMA, Institute of Arid Meteorology, China Meteorology Administration, Lanzhou 730020, China; 2.Zhangye Climatological Observatory, Zhanye 734000, China; 3.Nanjing University of Information Science and Technology, Nanjing 210044, China |
| Abstract: | By using the micrometeorology data observed at Xilingol grassland on 12—13 March, 2008, the characteristics of diurnal variations (in a clear day and a cloudy day) of surface radiation budget, heat budget and albedo over this semi-arid grassland were researched. On the clear day, the maximal value of total radiation, up-ward short radiation, down-ward long radiation and up-ward long radiation was 801 W·m-2, 203 W·m-2, 197 W·m-2 and 390 W·m-2, respectively. On the cloudy day it was 595 W·m-2, 147 W·m-2, 290 W·m-2 and 182 W·m-2, respectively. As for the sensible heat fluxes, potential heat flux, soil heat flux and net radiation, the value was 6.58 MJ·m-2·d-1, 1.05 MJ·m-2·d-1, -0.25 MJ·m-2·d-1 and 5.89 MJ·m-2·d-1 respectively on a clear day, but only 1.15 MJ·m-2·d-1, 0.49 MJ·m-2·d-1, -0.08 MJ·m-2·d-1 and 1.65 MJ·m-2·d-1 respectively on a cloudy day. In the diurnal curves, the albedo in the morning and afternoon is larger than that at noon on the clear day and the minimal value is 0.23; there is not obvious diurnal fluctuations on the cloudy day and the minimal value is 0.22. |
| Keywords: | grassland radiation budget albedo |
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