Two years of continuous CO2 eddy-flux measurements over a Danish beech   forest

doi:10.1016/S0168-1923(00)00227-6

CORC > 北京大学 > 地球与空间科学学院

	Two years of continuous CO2 eddy-flux measurements over a Danish beech forest
	Pilegaard, K ; Hummelshoj, P ; Jensen, NO ; Chen, Z
刊名	agricultural and forest meteorology
	2001
关键词	CO2 eddy covariance flux beech forest net ecosystem exchange EUROFLUX CARBON-DIOXIDE EXCHANGE SOIL RESPIRATION WATER-VAPOR DECIDUOUS FOREST ATMOSPHERIC CO2 NET CARBON TEMPERATE VARIABILITY CLIMATE GROWTH
DOI	10.1016/S0168-1923(00)00227-6
英文摘要	As part of the EUROFLUX network a long-term monitoring station for fluxes of CO2 and water vapour has been established in an 80-year old beech forest in Denmark. The station has been in continuous operation since June 1996 and will be so at least to the end of 2002. A primary goal of EUROFLUX is to combine flux measurements on a continuous multi-year time basis with ecological processes interpretation and modeling. The station consists of a 57 m high mast with conventional meteorological profile instrumentation and one level of eddy-flux measurements. Ancillary measurements such as soil respiration, soil moisture, soil temperature, leaf surface temperature and leaf area index are also made. Results from the first 2 years of measurements are described. The observed diurnal and seasonal variation in the fluxes are discussed and the monthly and annual sums of ecosystem exchange are contrasted between the 2 years. The first year (1 June 1996-31 May 1997) had a net uptake of 223 g C m(-2) whereas the net uptake during the second year (1 June 1997-31 May 1998) was only 144 g C m(-2). It was found that the difference was mainly the result of higher respiration in the second year caused by a very warm summer of 1997 and an average soil and air temperature, respectively, 1.2 and 1.6 degreesC higher than the first year. The ecosystem photosynthetic assimilation was slightly higher during the second year, mainly caused by increased incoming radiation. (C) 2001 Elsevier Science B.V. All nights reserved.; Agronomy; Forestry; Meteorology & Atmospheric Sciences; SCI(E); 123; ARTICLE; 1; 29-41; 107
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/211667]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Pilegaard, K,Hummelshoj, P,Jensen, NO,et al. Two years of continuous CO2 eddy-flux measurements over a Danish beech forest[J]. agricultural and forest meteorology,2001.
APA	Pilegaard, K,Hummelshoj, P,Jensen, NO,&Chen, Z.(2001).Two years of continuous CO2 eddy-flux measurements over a Danish beech forest.agricultural and forest meteorology.
MLA	Pilegaard, K,et al."Two years of continuous CO2 eddy-flux measurements over a Danish beech forest".agricultural and forest meteorology (2001).