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来源类型Article
规范类型其他
DOI10.1038/s41561-017-0020-5
Substantial large-scale feedbacks between natural aerosols and climate.
Scott C E; Arnold S R; Monks S A; Asmi A; Paasonen P; Spracklen D
发表日期2018
出处Nature Geoscience 11 (1): 44-48
出版年2018
语种英语
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.
主题Mitigation of Air Pollution (MAG)
URLhttp://pure.iiasa.ac.at/id/eprint/15005/
来源智库International Institute for Applied Systems Analysis (Austria)
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资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/131441
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GB/T 7714
Scott C E,Arnold S R,Monks S A,et al. Substantial large-scale feedbacks between natural aerosols and climate.. 2018.
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