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DOI | 10.1016/j.agrformet.2019.04.010 |
The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden | |
Chi, Jinshu1; Nilsson, Mats B.1; Kljun, Natascha2,3; Wallerman, Jorgen4; Fransson, Johan E. S.4; Laudon, Hjalmar1; Lundmark, Tomas1; Peichl, Matthias1 | |
发表日期 | 2019 |
ISSN | 0168-1923 |
EISSN | 1873-2240 |
卷号 | 274页码:29-41 |
英文摘要 | Boreal forests exchange large amounts of carbon dioxide (CO2) with the atmosphere. A managed boreal landscape usually comprises various potential CO2 sinks and sources across forest stands of varying age classes, clear-cut areas, mires, and lakes. Due to this heterogeneity and complexity, large uncertainties exist regarding the net CO2 balance at the landscape scale. In this study, we present the first estimate of the net CO2 exchange over a managed boreal landscape (similar to 68 km(2)) in northern Sweden, based on tall tower eddy covariance measurements. Our results suggest that from March 1, 2016 to February 28, 2018, the heterogeneous landscape was a net CO2 sink with a 2-year mean uptake of -87 +/- 6g C m(-2) yr(-1). Due to an earlier and warmer spring and sunnier autumn, the landscape was a stronger CO2 sink during the first year (-122 +/- 8g C m(-2)) compared to the second year (-52 +/- 9g C m(-2)). Footprint analysis shows that 87% of the CO2 flux measurements originated from forests, whereas mires, clear-cuts, lakes, and grassland contributed 11%, 1%, 0.7%, and 0.2%, respectively. Altogether, the CO2 sink strength of the heterogeneous landscape was up to 38% lower compared to the sink strength of a mature stand surrounding the tower. Overall, this study suggests that the managed boreal landscape acted as a CO2 sink and advocates tall tower eddy covariance measurements to improve regional carbon budget estimates. |
WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
来源期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/101911 |
作者单位 | 1.Swedish Univ Agr Sci, Dept Forest Ecol & Management, Umea, Sweden; 2.Swansea Univ, Dept Geog, Swansea, W Glam, Wales; 3.Lund Univ, Ctr Environm & Climate Res, Lund, Sweden; 4.Swedish Univ Agr Sci, Dept Forest Resource Management, Umea, Sweden |
推荐引用方式 GB/T 7714 | Chi, Jinshu,Nilsson, Mats B.,Kljun, Natascha,et al. The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden[J],2019,274:29-41. |
APA | Chi, Jinshu.,Nilsson, Mats B..,Kljun, Natascha.,Wallerman, Jorgen.,Fransson, Johan E. S..,...&Peichl, Matthias.(2019).The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden.AGRICULTURAL AND FOREST METEOROLOGY,274,29-41. |
MLA | Chi, Jinshu,et al."The carbon balance of a managed boreal landscape measured from a tall tower in northern Sweden".AGRICULTURAL AND FOREST METEOROLOGY 274(2019):29-41. |
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