The Semidirect Effect of Combined Dust and Sea Salt Aerosols in a Multimodel Analysis

被引：8

作者：

Amiri-Farahani, Anahita ^{[1
]}

Allen, Robert J. ^{[2
]}

Li, King-Fai ^{[1
]}

Chu, Jung-Eun ^{[3
]}

机构：

[1] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA

[2] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA

[3] Inst Basic Sci, Ctr Climate Phys, Busan, South Korea

来源：

GEOPHYSICAL RESEARCH LETTERS | 2019年 / 46卷 / 17-18期

关键词：

DELTA-EDDINGTON APPROXIMATION; BLACK CARBON; TROPOSPHERIC AEROSOLS; CLIMATE SIMULATIONS; ABSORBING AEROSOLS; RADIATIVE-TRANSFER; STRATIFORM CLOUDS; MOIST CONVECTION; MODEL; PARAMETERIZATION;

D O I：

10.1029/2019GL084590

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

To date, very few studies have focused on dust and sea salt cloud interactions, particularly the semidirect effect (SDE) that results from changes in column temperature and moisture. Here, we isolate the SDE using several climate models driven by semiempirical dust and sea salt direct radiative effects. The global annual mean SDE varies from 0.01 to 0.10 W/m(2), with the bulk of the signal coming from an increase in shortwave radiation. This is consistent with decreases in low cloud over ocean due to cloud burn-off and reductions in midlevel cloud over land due to atmospheric stabilization and decreased convection. Overall, longwave effects weaken the positive SDE but with opposing effects over land and sea. High cloud is reduced over land but enhanced over sea. We conclude that dust and sea salt likely exert a global mean warming effect through cloud rapid adjustments.

引用

页码：10512 / 10521

页数：10

共 59 条

[1] Reduction of tropical cloudiness by soot [J].

Ackerman, AS ;

Toon, OB ;

Stevens, DE ;

Heymsfield, AJ ;

Ramanathan, V ;

Welton, EJ .

SCIENCE, 2000, 288 (5468) :1042-1047

[2] Aerosol-cloud semi-direct effect and land-sea temperature contrast in a GCM [J].

Allen, R. J. ;

Sherwood, S. C. .

GEOPHYSICAL RESEARCH LETTERS, 2010, 37

[3] Observationally constrained aerosol-cloud semi-direct effects [J].

Allen, Robert J. ;

Amiri-Farahani, Anahita ;

Lamarque, Jean-Francois ;

Smith, Chris ;

Shindell, Drew ;

Hassan, Taufiq ;

Chung, Chul E. .

NPJ CLIMATE AND ATMOSPHERIC SCIENCE, 2019, 2 (1)

[4] The vertical distribution of black carbon in CMIP5models: Comparison to observations and the importance of convective transport [J].

Allen, Robert J. ;

Landuyt, William .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2014, 119 (08) :4808-4835

[5] Impact of Saharan dust on North Atlantic marine stratocumulus clouds: importance of the semidirect effect [J].

Amiri-Farahani, Anahita ;

Allen, Robert J. ;

Neubauer, David ;

Lohmann, Ulrike .

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2017, 17 (10) :6305-6322

[6] The new GFDL global atmosphere and land model AM2-LM2: Evaluation with prescribed SST simulations [J].

Anderson, JL ;

Balaji, V ;

Broccoli, AJ ;

Cooke, WF ;

Delworth, TL ;

Dixon, KW ;

Donner, LJ ;

Dunne, KA ;

Freidenreich, SM ;

Garner, ST ;

Gudgel, RG ;

Gordon, CT ;

Held, IM ;

Hemler, RS ;

Horowitz, LW ;

Klein, SA ;

Knutson, TR ;

Kushner, PJ ;

Langenhost, AR ;

Lau, NC ;

Liang, Z ;

Malyshev, SL ;

Milly, PCD ;

Nath, MJ ;

Ploshay, JJ ;

Ramaswamy, V ;

Schwarzkopf, MD ;

Shevliakova, E ;

Sirutis, JJ ;

Soden, BJ ;

Stern, WF ;

Thompson, LA ;

Wilson, RJ ;

Wittenberg, AT ;

Wyman, BL .

JOURNAL OF CLIMATE, 2004, 17 (24) :4641-4673

[7] Updated estimate of aerosol direct radiative forcing from satellite observations and comparison against the Hadley Centre climate model [J].

Bellouin, Nicolas ;

Jones, Andy ;

Haywood, Jim ;

Christopher, Sundar A. .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2008, 113 (D10)

[8] Absorbing aerosols and summer monsoon evolution over South Asia: An observational portrayal [J].

Bollasina, Massimo ;

Nigam, Sumant ;

Lau, K. -M. .

JOURNAL OF CLIMATE, 2008, 21 (13) :3221-3239

[9] Bounding the role of black carbon in the climate system: A scientific assessment [J].

Bond, T. C. ;

Doherty, S. J. ;

Fahey, D. W. ;

Forster, P. M. ;

Berntsen, T. ;

DeAngelo, B. J. ;

Flanner, M. G. ;

Ghan, S. ;

Kaercher, B. ;

Koch, D. ;

Kinne, S. ;

Kondo, Y. ;

Quinn, P. K. ;

Sarofim, M. C. ;

Schultz, M. G. ;

Schulz, M. ;

Venkataraman, C. ;

Zhang, H. ;

Zhang, S. ;

Bellouin, N. ;

Guttikunda, S. K. ;

Hopke, P. K. ;

Jacobson, M. Z. ;

Kaiser, J. W. ;

Klimont, Z. ;

Lohmann, U. ;

Schwarz, J. P. ;

Shindell, D. ;

Storelvmo, T. ;

Warren, S. G. ;

Zender, C. S. .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2013, 118 (11) :5380-5552

[10] DELTA-EDDINGTON APPROXIMATION FOR SOLAR-RADIATION IN THE NCAR COMMUNITY CLIMATE MODEL [J].

BRIEGLEB, BP .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1992, 97 (D7) :7603-7612

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