干旱区生态环境知识资源中心(Arid): 陇中黄土高原垂直感热平流输送对LAS和EC观测感热通量差异的影响

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	陇中黄土高原垂直感热平流输送对LAS和EC观测感热通量差异的影响
其他题名	Impact of Vertical Sensible Heat Advection on Differences between LAS and EC Measured Sensible Heat Flux over the Loess Plateau in Central Gansu,China
	郝小翠 1; 张强1 ; 杨泽粟 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:1 页码:211-219
中文摘要	利用"黄土高原陆面过程试验研究(LOPEX)"2010年6月定西站的陆面过程综合观测资料,以造成大孔径闪烁仪(LAS)和涡动相关仪(EC)测量感热通量的差异为切入点,从中尺度垂直感热平流输送过程入手,将垂直感热平流输送的贡献作为地表有效能量的一部分引入EC直接观测的感热通量,对比引入前后LAS和EC测量感热通量的差异大小。结果表明:黄土高原定西观测站近地层大气垂直方向主要表现为向上运动,峰值达到0.074m·s~(-1),为垂直感热平流输送提供了必要的动力条件。尤其该地区处在半干旱区,地表受太阳辐射加热比较显著,近地层温度梯度最大可达0.39K·m~(-1),为产生垂直感热平流提供了能量基础。加入垂直感热平流输送的贡献后,EC地表能量不闭合度的日均值由直接观测的0.30缩小到0.24。修正后,LAS和EC测量的感热通量拟合的线性趋势系数由直接观测时的1.258缩小到1.186,两者差异得以缩小。
英文摘要	Using the observation data of Experimental Study of Land Surface Processes in Chinese Loess Plateau(LOPEX)for the period of June,2010 at Dingxi observation station,this article compared the differences between LAS and EC observed sensible heat flux by introducing the vertical sensible heat advection as an effective surface energy to sensible heat flux of EC observation.The results suggested that the mainly air movement at Dingxi observation station is upward with the max value of 0.074 m·s~(-1),providing the necessary dynamic conditions for vertical advection.Furthermore,for the site locating at semi-arid areas,the surface is well heated by solar radiation,and that causes a large temperature gradient near surface with a max value of 0.39 K·m~(-1),which provides the energy basis for generating vertical advection.When the contribution of vertical sensible heat advection is taken into consideration,the daily average surface energy unclosure of EC reduced from0.30 to 0.24,and the linear fitting coefficient between LAS and EC measured sensible heat flux reduced from1.258 to 1.186,which indicates that the differences between LAS and EC measured sensible heat flux could be reduced after the correction.
中文关键词	大孔径闪烁仪(LAS) ; 涡动相关仪(EC) ; 感热通量差异 ; EC地表能量不闭合度 ; 垂直感热平流输送
英文关键词	Large Aperture Scintillometer(LAS) Eddy Covariance system (EC) difference of sensible heat flux EC’s surface energy unclosure vertical sensible heat advection
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:5337122
来源机构	兰州大学 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233716
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, 兰州, 甘肃 730020, 中国; 2.兰州大学大气科学学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	郝小翠,张强,杨泽粟. 陇中黄土高原垂直感热平流输送对LAS和EC观测感热通量差异的影响[J]. 兰州大学, 中国气象局兰州干旱气象研究所,2015,35(1):211-219.
APA	郝小翠,张强,&杨泽粟.(2015).陇中黄土高原垂直感热平流输送对LAS和EC观测感热通量差异的影响.中国沙漠,35(1),211-219.
MLA	郝小翠,et al."陇中黄土高原垂直感热平流输送对LAS和EC观测感热通量差异的影响".中国沙漠 35.1(2015):211-219.