DOI: 10.1029/2017JD027878
Scopus记录号: 2-s2.0-85048949693
论文题名: Modeled Response of Greenland Snowmelt to the Presence of Biomass Burning-Based Absorbing Aerosols in the Atmosphere and Snow
作者: Ward J.L. ; Flanner M.G. ; Bergin M. ; Dibb J.E. ; Polashenski C.M. ; Soja A.J. ; Thomas J.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 11 起始页码: 6122
结束页码: 6141
语种: 英语
英文关键词: Greenland Ice Sheet
; light-absorbing aerosols
; snowmelt
Scopus关键词: absorption
; aerosol
; biomass burning
; black carbon
; climate modeling
; energy flux
; global climate
; simulation
; smoke
; snowmelt
; surface energy
; warming
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Biomass burning produces smoke aerosols that are emitted into the atmosphere. Some smoke constituents, notably black carbon, are highly effective light-absorbing aerosols (LAA). Emitted LAA can be transported to high-albedo regions like the Greenland Ice Sheet (GrIS) and affect local snowmelt. In the summer, the effects of LAA in Greenland are uncertain. To explore how LAA affect GrIS snowmelt and surface energy flux in the summer, we conduct idealized global climate model simulations with perturbed aerosol amounts and properties in the GrIS snow and overlying atmosphere. The in-snow and atmospheric aerosol burdens we select range from background values measured on the GrIS to unrealistically high values. This helps us explore the linearity of snowmelt response and to achieve high signal-to-noise ratios. With LAA operating only in the atmosphere, we find no significant change in snowmelt due to the competing effects of surface dimming and tropospheric warming. Regardless of atmospheric LAA presence, in-snow black carbon-equivalent mixing ratios greater than ~60 ng/g produce statistically significant snowmelt increases over much of the GrIS. We find that net surface energy flux changes correspond well to snowmelt changes for all cases. The dominant component of surface energy flux change is solar energy flux, but sensible and longwave energy fluxes respond to temperature changes. Atmospheric LAA dampen the magnitude of solar radiation absorbed by in-snow LAA when both varieties are simulated. In general, the significant melt and surface energy flux changes we simulate occur with LAA quantities that have never been recorded in Greenland. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113705
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; School of Civil and Environmental Engineering, Duke University Durham, Durham, NC, United States; Earth Systems Research Center, EOS, University of New Hampshire, Durham, NH, United States; CRREL, USACE, Ft. Wainwright, AK, United States; Thayer School of Engineering, Dartmouth College, Hanover, NH, United States; National Institute of Aerospace, NASA Langley Research Center, Hampton, VA, United States; LATMOS, Paris, France
Recommended Citation:
Ward J.L.,Flanner M.G.,Bergin M.,et al. Modeled Response of Greenland Snowmelt to the Presence of Biomass Burning-Based Absorbing Aerosols in the Atmosphere and Snow[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(11)