DOI: 10.1029/2012GL054286
论文题名: The sign of the radiative forcing from marine cloud brightening depends on both particle size and injection amount
作者: Alterskjær K. ; Kristjánsson J.E.
刊名: Geophysical Research Letters
ISSN: 0094-9409
EISSN: 1944-9140
出版年: 2013
卷: 40, 期: 1 起始页码: 210
结束页码: 215
语种: 英语
Scopus关键词: Accumulation modes
; Coarse mode particles
; Competition effects
; Critical supersaturation
; Earth system model
; Marine boundary layers
; Radiative forcings
; Sea-salt emissions
; Atmospheric radiation
; Global warming
; Particle size
; Computer simulation
; aerosol composition
; Aitken nucleus
; boundary layer
; cloud radiative forcing
; marine atmosphere
; particle size
; radiative forcing
; sea salt
; supersaturation
英文摘要: Marine cloud brightening (MCB) is a proposed technique to limit global warming through injections of sea spray into the marine boundary layer. Using the Norwegian Earth System Model, the sensitivity of MCB to sea salt amount and particle size was studied by running a set of simulations in which Aitken (re = 0.04 μm), accumulation (re = 0.22 μm), or coarse (re = 2.46 μm) mode sea salt emissions were increased uniformly by 10-11 to 10-8 kg m-2 s -1. As desired, accumulation mode particles had a negative radiative effect of down to -3.3W m-2. Conversely, for Aitken mode particles, injections of 10-10 kg m-2 s-1 or greater led to a positive forcing of up to 8.4W m-2, caused by a strong competition effect combined with the high critical supersaturation of Aitken mode sea salt. The coarse mode particles gave a positive forcing of up to 1.2W m-2 because of a decrease in activation of background aerosols. Sensitivity experiments show that the competition effect dominated our results. MCB may have a cooling effect, but if the wrong size or injection amount is used, our simulations show a warming effect on the climate system. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874928124&doi=10.1029%2f2012GL054286&partnerID=40&md5=9cf208e2916ca986d905c405a79f80ac
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6673
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geosciences, Meteorology and Oceanography Section, University of Oslo, PO Box 1022, 0315 Oslo, Norway
Recommended Citation:
Alterskjær K.,Kristjánsson J.E.. The sign of the radiative forcing from marine cloud brightening depends on both particle size and injection amount[J]. Geophysical Research Letters,2013-01-01,40(1).