DOI: 10.1007/s10533-016-0207-7
Scopus记录号: 2-s2.0-84964328502
论文题名: Reduced sulfur trace gas exchange between a seasonally dry grassland and the atmosphere
作者: Whelan M.E. ; Rhew R.C.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期: 3 起始页码: 267
结束页码: 280
语种: 英语
英文关键词: Carbon disulfide
; Carbonyl sulfide
; COS
; Dimethyl sulfide
; Reduced sulfur compounds
Scopus关键词: acid rain
; aerosol
; anthropogenic effect
; biogeochemical cycle
; dimethylsulfide
; flux chamber
; gas exchange
; grassland
; growing season
; soil moisture
; soil temperature
; sulfur compound
; sulfur cycle
; trace gas
; California
; Santa Cruz [California]
; United States
英文摘要: Reduced sulfur gases are precursors to sulfate aerosols that act as cloud condensation nuclei and affect Earth’s radiative balance. The diminishing anthropogenic atmospheric sulfur inputs due to long-standing acid rain abatement activities increase the influence of natural emissions on the remaining sulfur budget. Most previous terrestrial observations of reduced sulfur gas fluxes focus on wetland ecosystems where sulfur gas emissions are highest. The diffuse natural production of sulfur gas from more widespread oxic ecosystems needs to be characterized. Here we report in situ fluxes of sulfur gases and CO2 from grasslands outside of Santa Cruz, CA, USA (36.96°N, 122.08°W). Monthly measurements were made using static flux chambers from March 2012 to March 2014. A large net emission of dimethyl sulfide (DMS) was observed during the growing season. During the non-growing dry season, small but quantifiable carbonyl sulfide (COS) exchange rates were correlated with soil temperature. When soil moisture was artificially increased in senescent grassland plots, the relative exchange of COS:CO2 increased and then returned to the original ratio within 2 h. Sulfur gas fluxes during wet season soil moisture transition events (i.e. after precipitation) indicate that understudied aerobic environments may provide an important contribution to atmospheric COS consumption and DMS production. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83387
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Sierra Nevada Research Institute, University of California at Merced, 5200 North Lake Road, Merced, CA, United States; Department of Geography and Berkeley Atmospheric Sciences Center, University of California at Berkeley, 507 McCone Hall #4740, Berkeley, CA, United States
Recommended Citation:
Whelan M.E.,Rhew R.C.. Reduced sulfur trace gas exchange between a seasonally dry grassland and the atmosphere[J]. Biogeochemistry,2016-01-01,128(3)