干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区冬小麦田土壤热通量的计算方法研究

Arid

	黄土高原半干旱区冬小麦田土壤热通量的计算方法研究
其他题名	Study of Estimation of Soil Heat Flux at a Wheat Field in Semi-Arid Area of Loess Plateau
	陈星; 余晔; 陈晋北; 张堂堂; 李振朝
来源期刊	高原气象
ISSN	1000-0534
出版年	2014
卷号	33 期号:6 页码:1514-1525
中文摘要	利用2010年6月平凉陆面过程与灾害天气观测研究站陆面过程观测资料, 对比分析了温度积分法、温度预报校正法和谐波法三种土壤热通量计算方法以及这三种方法的计算结果对地表能量平衡的影响, 并探讨了土壤水分运动对土壤热通量的影响。结果表明, 研究区土壤垂直非均质性明显, 由谐波法计算得到的0.05~0.10 m土壤热扩散系数kappa是0.10~0.20 m土壤层的3倍左右。通过对比三种方法计算得到的0.05 m土壤热通量和热通量板的实测结果表明, 温度积分法、温度预报校正法和谐波法计算的土壤热通量峰值都比实测值偏小, 分别偏小约23.6%、 25.0%和12.8%。与不考虑土壤热存储的情况相比, 利用温度积分法和温度预报校正法将土壤热通量板的实测结果校正到地表, 这样得到的陇东黄土高原雨后晴天农田地表能量闭合率分别提高了7.96%和4.54%; 由谐波法计算的地表土壤热通量可使地表能量闭合率提高约5.65%。在夏季雨后晴天, 发生在农田土壤中的水汽输送及相应的相变过程对土壤热通量有一定影响。
英文摘要	Three methods, i.e. integrate temperature method (ITHP), temperature prediction-correction method (TDEC) and harmonic analysis technique (HM), for the estimation of soil heat flux after rain were evaluated for a winter wheat field in the semi-arid area of Loess Plateau using data collected at the Pingliang Land Surface Process & Severe Weather Research Station. The influences of heat transferred by the soil water movement on the soil heat flux were discussed. The soil is highly heterogeneity in the vertical with the thermal diffusivity in the depth of 0.05~0.10 m being about 3 times of that in the depth of 0.10~0.20 m. The peak soil heat flux at 0.05 m depth calculated by the ITHP method, the TDEC method and the HM technique are smaller than the measured by about 23.6%, 25.0% and 12.8%, respectively. Compared to the direct measurements by a soil heat plate at 0.05 m depth, the ground heat flux calculated with the ITHP method, the TEDC method and the HM technique can improve the surface energy budget closure by 7.96%, 4.54% and 5.65% at the winter wheat site in the Loess Plateau, respectively. The transportation of water vapor and the corresponding phase transition in the agricultural soil played a role in ground heat flux.
中文关键词	土壤热通量 ; 温度积分法 ; 温度预报校正法 ; 谐波法 ; 土壤水分通量 ; 能量平衡 ; 黄土高原
英文关键词	Soil heat flux Integrate temperature method Temperature prediction-correction method Harmonic analysis Soil water flux Energy balance Loess Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5329129
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231275
作者单位	中国科学院寒区旱区环境与工程研究所, 中国科学院寒旱区陆面过程与气候变化重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈星,余晔,陈晋北,等. 黄土高原半干旱区冬小麦田土壤热通量的计算方法研究[J]. 中国科学院西北生态环境资源研究院,2014,33(6):1514-1525.
APA	陈星,余晔,陈晋北,张堂堂,&李振朝.(2014).黄土高原半干旱区冬小麦田土壤热通量的计算方法研究.高原气象,33(6),1514-1525.
MLA	陈星,et al."黄土高原半干旱区冬小麦田土壤热通量的计算方法研究".高原气象 33.6(2014):1514-1525.