Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Transient Climate Impacts for Scenarios of Aerosol Emissions from Asia: A Story of Coal versus Gas

Journal Article · · Journal of Climate
 [1];  [2];  [3]
  1. MIT Alliance for Research and Technology (Singapore); MIT
  2. MIT Alliance for Research and Technology (Singapore)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Fuel usage is an important driver of anthropogenic aerosol emissions. In Asia, it is possible that aerosol emissions may increase if business continues as usual, with economic growth driving an increase in coal burning. But it is also possible that emissions may decrease rapidly as a result of the widespread adoption of cleaner technologies or a shift toward noncoal fuels, such as natural gas. In this study, the transient climate impacts of two aerosol emissions scenarios are investigated: a representative concentration pathway 4.5 (RCP4.5) control, which projects a decrease in anthropogenic aerosol emissions, and a scenario with enhanced anthropogenic aerosol emissions from Asia. A coupled atmosphere–ocean configuration of the Community Earth System Model (CESM), including the Community Atmosphere Model, version 5 (CAM5), is used. Three sets of initial conditions are used to produce a three-member ensemble for each scenario. Enhanced Asian aerosol emissions are found to exert a large cooling effect across the Northern Hemisphere, partially offsetting greenhouse gas–induced warming. Aerosol-induced suppression of the East Asian and South Asian summer monsoon precipitation occurs. The enhanced Asian aerosol emissions also remotely impact precipitation in other parts of the world. Over Australia, austral summer monsoon precipitation is enhanced, an effect associated with a southward shift of the intertropical convergence zone, driven by the aerosol-induced cooling of the Northern Hemisphere. Over the Sahel, West African monsoon precipitation is suppressed, likely via a weakening of the West African westerly jet. These results indicate that fuel usage in Asia, through the consequent aerosol emissions and associated radiative effects, might significantly influence future climate both locally and globally.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-94ER61937
OSTI ID:
1438003
Journal Information:
Journal of Climate, Journal Name: Journal of Climate Journal Issue: 8 Vol. 29; ISSN 0894-8755
Publisher:
American Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (56)

Contribution of local and remote anthropogenic aerosols to the twentieth century weakening of the South Asian Monsoon: AEROSOLS AND SOUTH ASIAN MONSOON journal January 2014
Estimating global black carbon emissions using a top-down Kalman Filter approach: ESTIMATING GLOBAL BLACK CARBON EMISSIONS journal January 2014
Anthropogenic aerosols and the distribution of past large‐scale precipitation change journal December 2015
The roles of aerosol direct and indirect effects in past and future climate change: CLIMATE IMPACT OF AEROSOLS journal May 2013
Asian summer monsoon anomalies induced by aerosol direct forcing: the role of the Tibetan Plateau journal February 2006
Fast versus slow response in climate change: implications for the global hydrological cycle journal May 2009
A modeling study of the effects of aerosols on clouds and precipitation over East Asia journal April 2011
The representative concentration pathways: an overview journal August 2011
Global and regional evolution of short-lived radiatively-active gases and aerosols in the Representative Concentration Pathways journal August 2011
Pollution and the planetary albedo journal December 1974
Establishment of a database of emission factors for atmospheric pollutants from Chinese coal-fired power plants journal April 2010
A numerical study of the effect of different aerosol types on East Asian summer clouds and precipitation journal May 2013
Impact of anthropogenic absorbing aerosols on clouds and precipitation: A review of recent progresses journal March 2013
Deployment of Coal Briquettes and Improved Stoves: Possibly an Option for both Environment and Climate journal June 2009
Estimates of the direct and indirect radiative forcing due to tropospheric aerosols: A review journal November 2000
A modeling study on the climate impacts of black carbon aerosols: CLIMATE ASPECTS OF BLACK CARBON journal February 2004
Climatic effects of different aerosol types in China simulated by the UCLA general circulation model journal January 2006
Impact of direct radiative forcing of black carbon aerosols on tropical convective precipitation: BLACK CARBON AND TROPICAL PRECIPITATION journal March 2007
Impact of anthropogenic aerosols on Indian summer monsoon journal January 2009
Global simulations of ice nucleation and ice supersaturation with an improved cloud scheme in the Community Atmosphere Model journal January 2010
The impact of Asian and non-Asian anthropogenic aerosols on 20th century Asian summer monsoon: ASIAN MONSOON AND AEROSOLS journal June 2011
Impact of aerosols on convective clouds and precipitation: AEROSOL IMPACT ON CONVECTIVE CLOUDS journal April 2012
Potential impacts of Asian carbon aerosols on future US warming: ASIAN CARBON AEROSOLS & U.S. WARMING journal June 2012
Climate response of the South Asian monsoon system to anthropogenic aerosols: CLIMATE EFFECTS OF ANTHROPOGENIC AEROSOL journal July 2012
Climate impacts of ice nucleation: ICE NUCLEATION journal October 2012
Untangling aerosol effects on clouds and precipitation in a buffered system journal October 2009
Aerosols implicated as a prime driver of twentieth-century North Atlantic climate variability journal April 2012
Asymmetric forcing from stratospheric aerosols impacts Sahelian rainfall journal March 2013
Arctic amplification dominated by temperature feedbacks in contemporary climate models journal February 2014
Global air quality and climate journal January 2012
Atmospheric brown clouds: Impacts on South Asian climate and hydrological cycle journal March 2005
Drivers for the renaissance of coal journal July 2015
Climate Effects of Black Carbon Aerosols in China and India journal September 2002
Anthropogenic Aerosols and the Weakening of the South Asian Summer Monsoon journal September 2011
Aerosols, Cloud Microphysics, and Fractional Cloudiness journal September 1989
Reduction of Tropical Cloudiness by Soot journal May 2000
Extratropical Cooling, Interhemispheric Thermal Gradients, and Tropical Climate Change journal May 2012
Effects of Black Carbon Aerosols on the Indian Monsoon journal June 2008
A New Two-Moment Bulk Stratiform Cloud Microphysics Scheme in the Community Atmosphere Model, Version 3 (CAM3). Part I: Description and Numerical Tests journal August 2008
The Community Climate System Model Version 4 journal October 2011
Role of the West African Westerly Jet in Sahel Rainfall Variations journal April 2012
Toward a Minimal Representation of Aerosols in Climate Models: Comparative Decomposition of Aerosol Direct, Semidirect, and Indirect Radiative Forcing journal October 2012
Climate Change Projections in CESM1(CAM5) Compared to CCSM4 journal September 2013
Nonlinear Effects of Coexisting Surface and Atmospheric Forcing of Anthropogenic Absorbing Aerosols: Impact on the South Asian Monsoon Onset journal August 2013
The Impacts of European and Asian Anthropogenic Sulfur Dioxide Emissions on Sahel Rainfall journal September 2014
The Response of the South Asian Summer Monsoon to Temporal and Spatial Variations in Absorbing Aerosol Radiative Forcing journal September 2015
Robust Responses of the Hydrological Cycle to Global Warming journal November 2006
Sulfur dioxide and primary carbonaceous aerosol emissions in China and India, 1996–2010 journal January 2011
Aerosol- and greenhouse gas-induced changes in summer rainfall and circulation in the Australasian region: a study using single-forcing climate simulations journal January 2012
Projected effects of declining aerosols in RCP4.5: unmasking global warming? journal January 2013
The effect of regional changes in anthropogenic aerosols on rainfall of the East Asian Summer Monsoon journal January 2013
Radiative forcing in the ACCMIP historical and future climate simulations journal January 2013
Technical Note: Estimating aerosol effects on cloud radiative forcing journal January 2013
Emissions of primary aerosol and precursor gases in the years 2000 and 1750 prescribed data-sets for AeroCom journal January 2006
The sensitivity of tropical convective precipitation to the direct radiative forcings of black carbon aerosols emitted from major regions journal January 2009
Toward a minimal representation of aerosols in climate models: description and evaluation in the Community Atmosphere Model CAM5 journal January 2012

Cited By (9)

Do differences in future sulfate emission pathways matter for near-term climate? A case study for the Asian monsoon journal May 2017
Anthropogenic fine aerosols dominate over the Pune region, Southwest India journal December 2018
The Equilibrium Climate Response to Sulfur Dioxide and Carbonaceous Aerosol Emissions From East and Southeast Asia journal October 2018
Background Conditions Influence the Estimated Cloud Radiative Effects of Anthropogenic Aerosol Emissions From Different Source Regions journal February 2019
Effective radiative forcing in the aerosol-climate model CAM5.3-MARC-ARG text January 2018
Radiative effects of interannually varying vs. interannually invariant aerosol emissions from fires journal January 2016
Effective radiative forcing in the aerosol–climate model CAM5.3-MARC-ARG journal January 2018
Mechanisms for a remote response to Asian anthropogenic aerosol in boreal winter journal January 2019
Improving the representation of anthropogenic CO2 emissions in climate models: impact of a new parameterization for the Community Earth System Model (CESM) journal January 2018