期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 12, 页码 3297-3301出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50441
关键词
radiative effect; natural aerosol
资金
- NERC [NE/G005109/1, NE/G015015/1, NE/J009822/1, NE/J004723/1]
- NERC [NE/J004723/1, NE/G005109/1, NE/J009822/1, NE/G015015/1] Funding Source: UKRI
- Natural Environment Research Council [NE/J004723/1, NE/J009822/1, NE/G005109/1, NE/G015015/1] Funding Source: researchfish
Natural aerosol plays a significant role in the Earth's system due to its ability to alter the radiative balance of the Earth. Here we use a global aerosol microphysics model together with a radiative transfer model to estimate radiative effects for five natural aerosol sources in the present-day atmosphere: dimethyl sulfide (DMS), sea-salt, volcanoes, monoterpenes, and wildfires. We calculate large annual global mean aerosol direct and cloud albedo effects especially for DMS-derived sulfate (-0.23 Wm(-2) and -0.76 Wm(-2), respectively), volcanic sulfate (-0.21 Wm(-2) and -0.61 Wm(-2)) and sea-salt (-0.44 Wm(-2) and -0.04 Wm(-2)). The cloud albedo effect responds nonlinearly to changes in emission source strengths. The natural sources have both markedly different radiative efficiencies and indirect/direct radiative effect ratios. Aerosol sources that contribute a large number of small particles (DMS-derived and volcanic sulfate) are highly effective at influencing cloud albedo per unit of aerosol mass burden.
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