Anthropogenic sulfate aerosol and the southward shift of

Anthropogenic sulfate aerosol and the southward shift of

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Tropical Rainfall Trends and the Indirect Aerosol Effect

An atmospheric global climate model coupled to a mixed layer ocean model is used to study changes in tropical rainfall due to the indirect effects of anthropogenic sulfate aerosol.The model is run to equilibrium for present-day (PD) and preindustrial (PI) sulfur emission scenarios.As in two other recent studies,the model generally gives a southward shift of tropical rainfall in the PD run Tropical Pacific Ocean Dynamical Response to Short-Term The large-scale and long-term climate impacts of anthropogenic sulfate aerosols consist of Northern Hemisphere cooling and a southward shift of the tropical rain belt.On interannual time scales,however,the response to aerosols is localized with a sizable imprint on local oceanatmosphere interaction.Title Anthropogenic Sulfate Aerosol and the Southward 19 anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the 20 consistent southward shift across GCMs,although other processes affecting the atmospheric 21 energy budget also contribute to the model-to-model spread.22

The impact of natural versus anthropogenic aerosols on

observations if both greenhouse gases and sulfate aerosols are included (e.g.Mitchell et al.,1995).Sulfate aerosols also aect large-scale atmospheric circulation,particu-larly in the tropics,causing a southward shift of the Intertropical Conver-gence Zone (ITCZ) (Williams et al.,2001).This shiftThe Equilibrium Climate R esponse to Sulfur Dioxide and carbonaceous aerosols and sulfur dioxide,a precursor of sulfate aerosol.Using the Community Earth System Model,with the Community Atmosphere Model version 5.3,we find that anthropogenic aerosol emissions from East and Southeast Asia exert a global mean net radiative effect of -0.49 Anthropogenic sulfate aerosol and the southward shift of#177;0.04 W m-2.Approximately half of this cooling effect can The Equilibrium Climate R esponse to Sulfur Dioxide and carbonaceous aerosols and sulfur dioxide,a precursor of sulfate aerosol.Using the Community Earth System Model,with the Community Atmosphere Model version 5.3,we find that anthropogenic aerosol emissions from East and Southeast Asia exert a global mean net radiative effect of -0.49 Anthropogenic sulfate aerosol and the southward shift of#177;0.04 W m-2.Approximately half of this cooling effect can

Simulated responses of terrestrial aridity to black carbon

Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century AEROSOLS AND TROPICAL RAIN BELT SHIFTS journal,June 2013.Hwang,Yen-Ting; Frierson,Dargan M.W.; Kang,Sarah M.Geophysical Research Letters,Vol.40,Issue 11; DOI 10.1002/grl.50502Regional and global trends in sulfate aerosol since theRegional and global trends in sulfate aerosol since the 1980s in a southward shift in the global distribution of northern hemisphere sulfur emissions.Although atmospheric concentrations of sulfate and SO aerosol.Anthropogenic SO 2,volcanic SO 2 [Halmer et al.,Reexamining the Mechanisms of East Asian SummerAtmospheric aerosols can affect the radiation and energy budgets of Earth by directly absorbing and scattering sunlight (Myhre et al.2013a).Moreover,aerosols can alter cloud microphysics by acting as cloud condensation or ice nuclei,thereby affecting climate at the regional and global scales (Boucher et al.2013).Anthropogenic aerosol forcing has been identified as a primary driver of long

REPORTS Anthropogenic Aerosols and the Weakening of

Anthropogenic Aerosols and the Weakening of the South Asian Summer Monsoon Massimo A.Bollasina,1Yi Ming,2* V.Ramaswamy Observations show that South Asia underwent a widespread summertime dryingPubs.GISS Westervelt et al.2020 Relative importance of We use an atmosphere-only climate model to simulate the fast response of the summer monsoon to different anthropogenic aerosol types and to anthropogenic greenhouse gases.Without normalization,sulfate is the largest driver of precipitation change between 1850 and 2000,followed by black carbon and greenhouse gases.Previous123456NextAnthropogenic sulfate aerosol and the southward shift of Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century .By Yen-Ting Hwang, Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the atmospheric energy budget

In-situ measurements of molecular markers facilitate

Reducing the amount of organic aerosol (OA) is crucial to mitigation of particulate pollution in China.We present time and air-origin dependent variations of OA markers and source contributions at a regionally urban background site in South China.The continental air contained primary OA markers indicative of source categories,such as levoglucosan,fatty acids and oleic acid.Secondary OA Hemispheric climate shifts driven by anthropogenic aerosol Jul 17,2017 Anthropogenic sulfate aerosol and the southward shift of#0183;A southward shift of these rain belts has been observed throughout the latter half of the twentieth century,with profound societal consequences. S.M.Anthropogenic sulfate aerosolGlobal warming - Surface-level ozone and other compounds Global warming - Global warming - Surface-level ozone and other compounds The next most significant greenhouse gas is surface,or low-level,ozone (O3).Surface O3 is a result of air pollution; it must be distinguished from naturally occurring stratospheric O3,which has a very different role in the planetary radiation balance.The primary natural source of surface O3 is the subsidence of

Fast and slow shifts of the zonal-mean intertropical

Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century AEROSOLS AND TROPICAL RAIN BELT SHIFTS journal,June 2013.Hwang,Yen-Ting; Frierson,Dargan M.W.; Kang,Sarah M.Geophysical Research Letters,Vol.40,Issue 11; DOI 10.1002/grl.50502Fast and slow shifts of the zonal-mean intertropical Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century AEROSOLS AND TROPICAL RAIN BELT SHIFTS journal,June 2013.Hwang,Yen-Ting; Frierson,Dargan M.W.; Kang,Sarah M.Geophysical Research Letters,Vol.40,Issue 11; DOI 10.1002/grl.50502Equilibrium climate response of the East Asian summer Jan 22,2018 Anthropogenic sulfate aerosol and the southward shift of#0183;We used an online aerosolclimate model to study the equilibrium climate response of the East Asian summer monsoon (EASM) to increases in anthropogenic emissions of sulfate,organic carbon,and black carbon aerosols from 1850 to 2000.Our results show that each of these aerosol species has a different effect on the EASM as a result of changes in the local sealand thermal

Equilibrium climate response of the East Asian summer

Jan 22,2018 Anthropogenic sulfate aerosol and the southward shift of#0183;We used an online aerosolclimate model to study the equilibrium climate response of the East Asian summer monsoon (EASM) to increases in anthropogenic emissions of sulfate,organic carbon,and black carbon aerosols from 1850 to 2000.Our results show that each of these aerosol species has a different effect on the EASM as a result of changes in the local sealand thermalEquilibrium Climate Responses of the East Asian Summer aerosol species have substantially different impacts on the EASM by changing the local sea-land surface thermal difference and atmospheric circulation.The increased sulfate leads to decrease in the surface thermal difference between the land and ocean,the southward shift of the East Asian subtropical jetEffects of anthropogenic emissions on aerosol formation Jan 06,2015 Anthropogenic sulfate aerosol and the southward shift of#0183;Atmospheric secondary organic aerosol has substantial impacts on climate,air quality,and human health.However,the formation mechanisms of secondary organic aerosol remain uncertain,especially on how anthropogenic pollutants (from human activities) control aerosol formation from biogenic volatile organic compounds (emitted by vegetation) and the magnitude of anthropogenic

Effects of anthropogenic emissions on aerosol formation

Jan 06,2015 Anthropogenic sulfate aerosol and the southward shift of#0183;Atmospheric secondary organic aerosol has substantial impacts on climate,air quality,and human health.However,the formation mechanisms of secondary organic aerosol remain uncertain,especially on how anthropogenic pollutants (from human activities) control aerosol formation from biogenic volatile organic compounds (emitted by vegetation) and the magnitude of anthropogenicComparison of climate response to anthropogenic aerosol In the NH midlatitudes,patterns unique to anthropogenic aerosols include the North Pacific cooling,the drying trend over eastern Asia,and the southward shift of the NH westerly jet.Comparisons of climate response pattern indices quantify the distinct regional climate change between anthropogenic aerosolCited by 196Publish Year 2013Author Yen-Ting Hwang,Dargan M.W.Frierson,Sarah M.KangAnthropogenic sulfate aerosol and the southward shift of Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the atmospheric energy budget also contribute to the model-to-model spread.

Cited by 196Publish Year 2013Author Yen-Ting Hwang,Dargan M.W.Frierson,Sarah M.KangAnthropogenic sulfate aerosol and the southward shift of

Apr 24,2013 Anthropogenic sulfate aerosol and the southward shift of#0183;Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the atmospheric energy budget also contribute to the modeltomodel spread.Cited by 196Publish Year 2013Author Yen-Ting Hwang,Dargan M.W.Frierson,Sarah M.KangAnthropogenic Sulfate Aerosol and the Southward ShiftOne possible cause of the southward precipitation shift from 1931~1950 to 1971~1990 is scattering aerosol-induced cooling that primarily occurs in the NH.The 1971~1990 time period experienced the most dramatic southward shift (Figure 1),and is also theAnthropogenic sulfate aerosol and the southward shift of Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the

Anthropogenic sulfate aerosol and the southward shift of

Jun 01,2013 Anthropogenic sulfate aerosol and the southward shift of#0183;Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century - NASA/ADS In this paper,we demonstrate a global scale southward shift of the tropical rain belt during the latter half of the 20th century in observations and global climate models (GCMs).Anthropogenic sulfate aerosol and the southward shift of Apr 24,2013 Anthropogenic sulfate aerosol and the southward shift of#0183;Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the atmospheric energy budget also contribute to the modeltomodel spread.1 IntroductionAnthropogenic sulfate aerosol and the southward shift of Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century .By Yen-Ting Hwang, Our results suggest that anthropogenic aerosol cooling of the Northern Hemisphere is the primary cause of the consistent southward shift across GCMs,although other processes affecting the atmospheric energy budget

Anthropogenic Aerosols and the Weakening of the South

Oct 28,2011 Anthropogenic sulfate aerosol and the southward shift of#0183;Because anthropogenic aerosols are located mainly in the Northern Hemisphere,the boreal summer meridional circulation,of which the South Asian summer monsoon is a major part (2),weakensAerosols and Climate - Oxford Research Encyclopedia of Aug 31,2020 Anthropogenic sulfate aerosol and the southward shift of#0183;Aerosols,or particulate matter,are airborne particles suspended in the Earths atmosphere.The particles can be liquid,solid,or of mixed phase,and their diameters typically range from 0.01m to 100m (Boucher et al.,2013).Aerosols can be either emitted directly to the atmosphere,as is the case for dust or sea spray swept up by winds and soot from incomplete combustion,or Aerosol forcing of the position of the intertropical The release of aerosols by human activities may have resulted in a southward shift of the intertropical convergence zone since the early 1900s (refs 1,3,4,5,6) by muting the warming of the

ASA - Anthropogenic Sulfate Aerosols AcronymAttic

Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century Yen-Ting Hwang,1 Dargan M.W.Frierson,1 and Sarah M.Kang2 Abstract.Tropospheric aerosols increase the shortwave anthropogenic sulfate aerosol in conjunction with overall reflectivity of the Earth-atmosphere system both byACP - Assessment of natural and anthropogenic aerosol air In addition to natural dust aerosols,the ME receives high concentrations of anthropogenic PM (Karagulian et al.,2015; Al-Taani et al.,2019; Alharbi et al.,2015; Khodeir et al.,2012).The most important anthropogenic aerosol in ME is sulfate,with SO 2 as a precursor; the contributions of other types of aerosols in PM sea salt,organic matter,and black carbon are of lesser A study on the direct effect of anthropogenic aerosolsThe RegCM3/aerosol model is a coupled model between RegCM3 and a simplied anthropogenic aerosol model,which can be used to investigate the aerosol feedback to cli-mate (Solmon et al.,2006).In this model version only the direct shortwave effects of anthropogenic aerosols are in-cluded.The aerosol model includes sulphur dioxide (SO2

A numerical study of the effect of different aerosol types

May 01,2013 Anthropogenic sulfate aerosol and the southward shift of#0183;However,the effect of all anthropogenic aerosols is not a linear summation of effects from individual anthropogenic sulfate,BC and POM because of,e.g.,the internal mixing among aerosols for the enhancement of aerosol absorption of shortwave radiation (aerosol direct effect),the competition among aerosols for water vapor during the droplet 12345NextAerosol forcing of the position of the intertropical The position of the intertropical convergence zone may be influenced by aerosols.A 450-year-long precipitation record from Belize confirms a southward shift associated with increasing

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