DOI: 10.1038/s41561-017-0020-5
论文题名: Substantial large-scale feedbacks between natural aerosols and climate
作者: Scott C.E. ; Arnold S.R. ; Monks S.A. ; Asmi A. ; Paasonen P. ; Spracklen D.V.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2018
卷: 11, 期: 1 起始页码: 44
结束页码: 48
语种: 英语
Scopus关键词: aerosol
; atmosphere-biosphere interaction
; biogenic emission
; biogeochemistry
; climate conditions
; climate effect
; climate feedback
; climate modeling
; meteorology
; organic compound
; temperature profile
英文摘要: The terrestrial biosphere is an important source of natural aerosol. Natural aerosol sources alter climate, but are also strongly controlled by climate, leading to the potential for natural aerosol-climate feedbacks. Here we use a global aerosol model to make an assessment of terrestrial natural aerosol-climate feedbacks, constrained by observations of aerosol number. We find that warmer-than-average temperatures are associated with higher-than-average number concentrations of large (>100 nm diameter) particles, particularly during the summer. This relationship is well reproduced by the model and is driven by both meteorological variability and variability in natural aerosol from biogenic and landscape fire sources. We find that the calculated extratropical annual mean aerosol radiative effect (both direct and indirect) is negatively related to the observed global temperature anomaly, and is driven by a positive relationship between temperature and the emission of natural aerosol. The extratropical aerosol-climate feedback is estimated to be -0.14 W m-2 K-1 for landscape fire aerosol, greater than the -0.03 W m-2 K-1 estimated for biogenic secondary organic aerosol. These feedbacks are comparable in magnitude to other biogeochemical feedbacks, highlighting the need for natural aerosol feedbacks to be included in climate simulations. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105628
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States; Department of Physics, University of Helsinki, Helsinki, Finland; International Institute for Applied Systems Analysis, Laxenburg, Austria
Recommended Citation:
Scott C.E.,Arnold S.R.,Monks S.A.,et al. Substantial large-scale feedbacks between natural aerosols and climate[J]. Nature Geoscience,2018-01-01,11(1)