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Assessing scalar concentration footprint climatology and land surface impacts on tall-tower CO2 concentration measurements in the boreal forest of central Saskatchewan, Canada
Chen, Baozhang; Zhang, Huifang(张慧芳); Coops, Nicholas C.; Fu, Dongjie; Worthy, Douglas E. J.; Xu, Guang(许光); Black, T. Andy
2014
Source PublicationTHEORETICAL AND APPLIED CLIMATOLOGY
Volume118Issue:1-2Pages:115-132
Corresponding AuthorChen, BZ
Abstract

Reducing the large uncertainties in current estimates of CO2 sources and sinks at regional scales (10(2)-10(5) km(2)) is fundamental to improving our understanding of the terrestrial carbon cycle. Continuous high-precision CO2 concentration measurements on a tower within the planetary boundary layer contain information on regional carbon fluxes; however, its spatial representativeness is generally unknown. In this study, we developed a footprint model (Simple Analytical Footprint model based on Eulerian coordinates for scalar Concentration [SAFE-C]) and applied it to two CO2 concentration towers in central Canada: the East Trout Lake 106-m-tall tower (54A degrees 21'N, 104A degrees 59'W) and the Candle Lake 28-m-high tower (53A degrees 59'N, 105A degrees 07'W). Results show that the ETL tower's annual concentration footprints were around 10(3)-10(5) km(2). The monthly footprint climatologies in summer were 1.5-2 times larger than in winter. The impacts of land surface carbon flux associated with heterogeneous distribution of vegetation types on the CO2 concentration measurements were different for the different heights, varied with a range of +/- 5 % to +/- 10 % among four heights. This study indicates that concentration footprint climatology analysis is important in interpreting the seasonal, annual and inter-annual variations of tower measured CO2 concentration data and is essential for comparing and scaling regional carbon flux estimates using top-down or bottom-up approaches.

Indexed BySCI
Funding OrganizationGlobal Change Program of the Chinese Ministry of Science and Technology 2010CB950704等
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/29264
Collection研究生部
Recommended Citation
GB/T 7714
Chen, Baozhang,Zhang, Huifang,Coops, Nicholas C.,et al. Assessing scalar concentration footprint climatology and land surface impacts on tall-tower CO2 concentration measurements in the boreal forest of central Saskatchewan, Canada[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2014,118(1-2):115-132.
APA Chen, Baozhang.,Zhang, Huifang.,Coops, Nicholas C..,Fu, Dongjie.,Worthy, Douglas E. J..,...&Black, T. Andy.(2014).Assessing scalar concentration footprint climatology and land surface impacts on tall-tower CO2 concentration measurements in the boreal forest of central Saskatchewan, Canada.THEORETICAL AND APPLIED CLIMATOLOGY,118(1-2),115-132.
MLA Chen, Baozhang,et al."Assessing scalar concentration footprint climatology and land surface impacts on tall-tower CO2 concentration measurements in the boreal forest of central Saskatchewan, Canada".THEORETICAL AND APPLIED CLIMATOLOGY 118.1-2(2014):115-132.
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