Decrease in radiative forcing by organic aerosol nucleation, climate, and land use change

被引：54

作者：

Zhu, Jialei ^{[1
]}

Penner, Joyce E. ^{[1
]}

Yu, Fangqun ^{[2
]}

Sillman, Sanford ^{[1
]}

Andreae, Meinrat O. ^{[3
,4
,5
]}

Coe, Hugh ^{[6
]}

机构：

[1] Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA

[2] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA

[3] Max Planck Inst Chem, Biogeochem Dept, Mainz, Germany

[4] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

[5] King Saud Univ, Dept Geol & Geophys, Riyadh, Saudi Arabia

[6] Univ Manchester, Sch Earth & Environm Sci, Manchester M13 9PL, Lancs, England

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

巴西圣保罗研究基金会;

关键词：

ATMOSPHERIC PARTICLE FORMATION; MASTER CHEMICAL MECHANISM; MCM V3 PART; TROPOSPHERIC DEGRADATION; NATURAL AEROSOLS; SOA FORMATION; EMISSIONS; CHEMISTRY; ISOPRENE; MODEL;

D O I：

10.1038/s41467-019-08407-7

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Organic nucleation is an important source of atmospheric aerosol number concentration, especially in pristine continental regions and during the preindustrial period. Here, we improve on previous simulations that overestimate boundary layer nucleation in the tropics and add changes to climate and land use to evaluate climate forcing. Our model includes both pure organic nucleation and heteromolecular nucleation of sulfuric acid and organics and reproduces the profile of aerosol number concentration measured in the Amazon. Organic nucleation decreases the sum of the total aerosol direct and indirect radiative forcing by 12.5%. The addition of climate and land use change decreases the direct radiative forcing (-0.38 W m(-2)) by 6.3% and the indirect radiative forcing (-1.68 W m(-2)) by 3.5% due to the size distribution and number concentration change of secondary organic aerosol and sulfate. Overall, the total radiative forcing associated with anthropogenic aerosols is decreased by 16%.

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页数：7

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