DOI: 10.1002/2016GL070052
论文题名: The effect of atmospheric sulfate reductions on diffuse radiation and photosynthesis in the United States during 1995–2013
作者: Keppel-Aleks G. ; Washenfelder R.A.
刊名: Geophysical Research Letters
ISSN: 0094-8616
EISSN: 1944-8347
出版年: 2016
卷: 43, 期: 18 起始页码: 9984
结束页码: 9993
语种: 英语
英文关键词: atmospheric aerosol
; carbon sink
; gross primary productivity
; optical properties
; photosynthesis
; sulfate
Scopus关键词: Aerosols
; Atmospheric aerosols
; Photosynthesis
; Sulfur compounds
; Sulfur dioxide
; Aerosol optical depths
; Carbon sink
; Diffuse radiation
; Earth system model
; Gross primary production
; Gross primary productivity
; Sulfate
; Temperate forests
; Optical properties
英文摘要: Aerosol optical depth (AOD) has been shown to influence the global carbon sink by increasing the fraction of diffuse light, which increases photosynthesis over a greater fraction of the vegetated canopy. Between 1995 and 2013, U.S. SO2 emissions declined by over 70%, coinciding with observed AOD reductions of 3.0 ± 0.6% yr−1 over the eastern U.S. In the Community Earth System Model (CESM), these trends cause diffuse light to decrease regionally by almost 0.6% yr−1, leading to declines in gross primary production (GPP) of 0.07% yr−1. Integrated over the analysis period and domain, this represents 0.5 Pg C of omitted GPP. A separate upscaling calculation that used published relationships between GPP and diffuse light agreed with the CESM model results within 20%. The agreement between simulated and data-constrained upscaling results strongly suggests that anthropogenic sulfate trends have a small impact on carbon uptake in temperate forests due to scattered light. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84989329082&doi=10.1002%2f2016GL070052&partnerID=40&md5=81538033f471a1a8aa8f8231bc6481d3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9579
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
Recommended Citation:
Keppel-Aleks G.,Washenfelder R.A.. The effect of atmospheric sulfate reductions on diffuse radiation and photosynthesis in the United States during 1995–2013[J]. Geophysical Research Letters,2016-01-01,43(18).