DOI: 10.1111/gcb.14927
论文题名: Evidence for large carbon sink and long residence time in semiarid forests based on 15 year flux and inventory records
作者: Qubaja R. ; Grünzweig J.M. ; Rotenberg E. ; Yakir D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期: 3 语种: 英语
英文关键词: carbon sequestration
; carbon sink
; carbon turnover time
; ecosystem productivity
; semiarid
; soil carbon
Scopus关键词: carbon sequestration
; carbon sink
; climate effect
; ecosystem management
; forest dynamics
; global change
; plantation forestry
; semiarid region
英文摘要: The rate of change in atmospheric CO2 is significantly affected by the terrestrial carbon sink, but the size and spatial distribution of this sink, and the extent to which it can be enhanced to mitigate climate change are highly uncertain. We combined carbon stock (CS) and eddy covariance (EC) flux measurements that were collected over a period of 15 years (2001–2016) in a 55 year old 30 km2 pine forest growing at the semiarid timberline (with no irrigating or fertilization). The objective was to constrain estimates of the carbon (C) storage potential in forest plantations in such semiarid lands, which cover ~18% of the global land area. The forest accumulated 145–160 g C m−2 year−1 over the study period based on the EC and CS approaches, with a mean value of 152.5 ± 30.1 g C m−2 year−1 indicating 20% uncertainty in carbon uptake estimates. Current total stocks are estimated at 7,943 ± 323 g C/m2 and 372 g N/m2. Carbon accumulated mostly in the soil (~71% and 29% for soil and standing biomass carbon, respectively) with long soil carbon turnover time (59 years). Regardless of unexpected disturbances beyond those already observed at the study site, the results support a considerable carbon sink potential in semiarid soils and forest plantations, and imply that afforestation of even 10% of semiarid land area under conditions similar to that of the study site, could sequester ~0.4 Pg C/year over several decades. © 2019 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158886
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel
Recommended Citation:
Qubaja R.,Grünzweig J.M.,Rotenberg E.,et al. Evidence for large carbon sink and long residence time in semiarid forests based on 15 year flux and inventory records[J]. Global Change Biology,2020-01-01,26(3)