自然资源学报 ›› 2015, Vol. 30 ›› Issue (5): 796-809.doi: 10.11849/zrzyxb.2015.05.008

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巴丹吉林沙漠腹地夏季不同天气条件下陆-湖面辐射收支与能量分配特征对比

马宁1,2, 王乃昂1, 黄银洲1, 李宏宇3, 路俊伟1   

  1. 1. 兰州大学资源环境学院干旱区气候变化与水循环研究中心, 兰州730000;
    2. 中国科学院青藏高原研究所, 北京100101;
    3. 南京大学大气科学学院, 南京210000
  • 收稿日期:2014-05-13 修回日期:2014-10-25 出版日期:2015-05-20 发布日期:2015-05-20
  • 通讯作者: 王乃昂,E-mail:wangna@lzu.edu.cn E-mail:wangna@lzu.edu.cn
  • 作者简介:马宁(1990-),男,安徽蒙城人,博士研究生,主要从事地表水热循环观测与模拟研究。Email:ma.n2007@aliyun.com
  • 基金资助:

    国家自然科学基金(41101187,41371114);国家环保公益性行业科研专项(201209034)。

Characteristics of Radiation Budget and Energy Partitioning on Land and Lake Surface under Different Summer Weather Conditions in the Hinterland of Badain Jaran Desert

MANing1,2, WANG Nai-ang1, HUANG Yin-zhou1, LI Hong-yu3, LU Jun-wei1   

  1. 1. College of Environmental and Earth Sciences, Center for Hydrological Cycle and Climate Change in Arid Region, Lanzhou University, Lanzhou 730000, China;
    2. Institute of Tibetan Plateau Research, CAS, Beijing 100101, China;
    3. College of Atmospheric Sciences, Nanjing University, Nanjing 210000, China
  • Received:2014-05-13 Revised:2014-10-25 Online:2015-05-20 Published:2015-05-20

摘要:

论文以巴丹吉林沙漠腹地陆面和湖面能量平衡系统的定位观测数据为基础,对比分析了夏季不同天气条件下两种典型下垫面的辐射收支和能量分配之异同,评价了典型晴天的辐射收支与能量分配对季节平均气候态的代表性。结果显示,按“晴天—多云—阴天—降水”的顺序,陆面与湖面的总辐射、反射短波辐射和净辐射之日均值呈逐渐减小趋势,大气逆辐射则逐渐增大。湖面长波辐射亦随这一天气变化顺序逐渐增大,暗示地下水携带的热量和局地平流作用对湖水表面温度皆有影响。非降水天气时,陆面感热通量占净辐射的主要部分。云和降水皆会直接影响陆面的能量分配,感热通量一般随云量的增加而减小,潜热通量则逐渐增大。湖面典型晴天的午后存在逆温现象,然降水天气时,湖面空气温度降低较快,破坏了湖面上空的逆温层,即感热通量皆为正值。湖面的潜热通量主要决定于风速,故其对天气变化响应不明显。在地下水携带的热量和局地平流共同作用下,湖面的感热通量和潜热通量之和大于湖面的净辐射。不同天气下陆面和湖面的波文比差异较大。陆面典型晴天的辐射收支和能量分配与季节平均气候态相差不大,湖面的典型晴天则不具有季节平均气候态的代表性。

关键词: 涡度相关, 辐射收支, 陆面过程, 能量分配, 巴丹吉林沙漠

Abstract:

Based on the in-situ observations on land and lake surface in the hinterland of Badain Jaran Desert, we compared the diurnal variation of radiation flux, energy partitioning and bowen ratio under different weather conditions in summer. The results showed that the radiation flux on two underlying surfaces performed significant difference in different weathers. The downward shortwave radiation, upward shortwave radiation and net radiation (Rn) on both land and lake surfaces decreased in the order of “sunny-cloudy-overcast-rainy day”, while the downward long wave radiation increased in the same order. However, the increase of upward long wave radiation on the lake surface indicated that energy from groundwater and advection influenced the temperature of lake surface to some extent. The sensible heat took up the main portion of Rn on land surface on a sunny day. Both cloud and rain could lead to significant change of bowen ratio on land surface. Apparent temperature inversion was observed on the lake surface in the afternoon on sunny days because of the negative H; however, this phenomenon could be broken by the rain. The latent heat was decided by wind speed rather than temperature, and it showed no relevant relationship with weather's change. The advection effect and groundwater recharge could enable the sum of H and LE larger than the Rn on the lake surface. The radiation budget and energy partitioning of land surface on typical sunny days showed no significant difference to the monthly average status; however, the radiation and energy partitioning on the lake surface on sunny days showed great deviation from the monthly average.

Key words: radiation budget, eddy covariance, land surface process, energy partitioning, Badain Jaran Desert

中图分类号: 

  • P422