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	仪器表面加热效应对临泽站开路涡动相关系统CO_2通量的影响
其他题名	Effect of the Instrument Surface Heating on CO_2 Flux from Open-Path Eddy Covariance System at Linze Station
	吉喜斌 1; 赵文智1 ; 康尔泗 2; 张智慧 1; 金博文 1; 赵丽雯 1
来源期刊	高原气象
ISSN	1000-0534
出版年	2013
卷号	32 期号:1 页码:65-77
中文摘要	LI-7500分析仪仪器表面加热效应对开路式涡动相关系统CO_2通量观测结果影响显著,利用Burba校正方法对提高观测站CO_2通量观测精度、年净生态系统碳交换量(NEE)估算、全球CO_2交换量估算和气候变化模拟等具有重要意义。基于临泽站绿洲玉米农田的开路式涡动相关系统和小气候观测系统所获得的一年数据,利用Burba校正方法分别对LI-7500分析仪光路中的感热通量、大气潜热通量、CO_2通量以及NEE的季节变化过程进行了修正。结果表明,LI-7500分析仪底部窗口和支杆部分热量交换是光路中感热通量校正量的主要贡献者,平均分别为6.81W·m~(-2)和2.68W·m~(-2),其加热效应主要来源于太阳辐射和电子元件运行产生的热量;加热效应对潜热通量影响最小,平均校正量仅为0.24W·m~(-2);Burba校正对CO_2通量和NEE的季节变化影响显著,其平均校正量分别为19.14mug·CO_2·m~(-2).s-1和313.21mg·C·m~(-2)·d~(-1),而且气温越低加热效应对通量的影响越显著;除生长季空气中水汽浓度显著高于非生长季而导致潜热校正量较大外,生长季其他各通量的校正量明显小于非生长季,生长季光路中感热、周围大气潜热、CO_2通量和NEE日校正量分别为6.94 W·m~(-2)、0.33W·m~(-2)、12.86mug.CO_2·m~(-2)·s~(-1)和161.58mg.C·m~(-2)·d~(-1),分别是非生长季的60.4%,220.0%,50.6%和37.4%。若未进行仪器表面加热效应的Burba校正,在生长季和非生长季累计高估的绿洲玉米农田生态系统碳吸收量分别为25.85g.C·m~(-2)和88.47g.C·m~(-2)。
英文摘要	The instrument surface heating of LI-7500 analyzer has a significant impact on the measurement of CO_2 flux from open-path eddy covariance system, and the Burba correction to CO_2 flux is a most critical requirement for improving CO_2 measurement, net ecosystem exchange (NEE) estimate, and global CO_2 exchange and climate change modeling, etc. The sensible heat flux inside the optical path, latent heat flux and CO_2 flux were corrected using Burba correction approach for one annual datasets of measurements from an open-path eddy covariance system and from an automatic meteorological observation tower installed a maize field at Linze station. The results show that heat exchange from the bottom window and spars are the main contributor of the correction term of sensible heat flux inside the path with the mean values of 6.81 W·m~(-2) and 2.68 W·m~(-2), respectively. For latent heat flux, the magnitude of the correction term is least and negligible, and the mean value is only about 0.24 W·m~(-2). However, the measurements of CO_2 flux and seasonal NEE are significantly affected by the Burba correction approach, and the mean values of the correction term are 19.14 mug·CO_2·m~(-2)·s~(-1)and 313.21 mg·C·m~(-2)·d~(-1), respectively. Furthermore, with lower air temperature, the magnitude of the correction term is larger expect for the latent heat flux. For instance, during the growing season, the corrected terms of sensible heat flux inside the path, latent heat flux, CO_2 flux and daily NEE are 6.94 W·m~(-2), 0.33 W·m~(-2), 12.86 mug·CO_2·m~(-2)·s~(-1)and 161.58 mg·C·m~(-2)·d~(-1), and are about 60.4%, 220.0%, 50.6% and 37.4% of the values of the coordinates during the non-growing season, respectively. Most of all, no-using the Burba correction procedure could let to overestimate the carbon uptake with value around 25.85 g·C·m~(-2) during the growing season, and underestimate the carbon emission from the agroecosystem with the value around 88.47 g·C·m~(-2) during the non-growing season.
中文关键词	开路涡动相关系统 ; CO_2通量 ; 净生态系统碳交换量 ; Burba校正 ; 绿洲农田生态系统
英文关键词	Open-path eddy covariance system CO_2 flux Net ecosystem exchange Burba correction Oasis agroecosystem
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:4780980
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/2XILL650/229680
作者单位	1.中国科学院寒区旱区环境与工程研究所临泽内流河流域研究站, 中国科学院生态水文与流域科学重点实验室, 兰州, 甘肃 730000, 中国; 2.中国科学院生态水文与流域科学重点实验室, 中国科学院生态水文与流域科学重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	吉喜斌,赵文智,康尔泗,等. 仪器表面加热效应对临泽站开路涡动相关系统CO_2通量的影响[J]. 中国科学院西北生态环境资源研究院,2013,32(1):65-77.
APA	吉喜斌,赵文智,康尔泗,张智慧,金博文,&赵丽雯.(2013).仪器表面加热效应对临泽站开路涡动相关系统CO_2通量的影响.高原气象,32(1),65-77.
MLA	吉喜斌,et al."仪器表面加热效应对临泽站开路涡动相关系统CO_2通量的影响".高原气象 32.1(2013):65-77.