Variations in sulphate aerosols concentration during winter monsoon season for two consecutive years using a general circulation model

Verma, Sunita; Boucher, Oliviér; Upadhyaya, H. C.; Sharma, Om P.

doi:10.1016/s0187-6236(13)71082-8

Cited by 4 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Uncertainty in the magnitude of CAE forcing in the Indian Ocean and Indian continent can be reduced by improving the representation of Dry_Dep_Acc. Anth_SO2 also plays an important role in both continental and marine regions, confirming the results of Verma et al (2013). Neighboring land and marine regions in Southeast Asia and China are sensitive to noticeably different combinations of aerosol parameters.…”

supporting

confidence: 78%

“…Substantial anthropogenic sulfate aerosol concentrations are transported from Asian continents over the Indian Ocean during the early part of each year (Verma et al 2013), and Fadnavis et al (2013) established that ASM precipitation over India declines in response to anthropogenic emissions. The CAE significantly affects SST in the Indian Ocean (Yun et al 2014), largely countering the positive CO 2 forcing in this region since the early industrial period (Dong and Zhou 2014).…”

Section: ) Asian Summer Monsoonmentioning

confidence: 99%

See 1 more Smart Citation

The Climatic Importance of Uncertainties in Regional Aerosol–Cloud Radiative Forcings over Recent Decades

et al. 2015

View full text Add to dashboard Cite

Regional patterns of aerosol radiative forcing are important for understanding climate change on decadal time scales. Uncertainty in aerosol forcing is likely to vary regionally and seasonally because of the short aerosol lifetime and heterogeneous emissions. Here the sensitivity of regional aerosol cloud albedo effect (CAE) forcing to 31 aerosol process parameters and emission fluxes is quantified between 1978 and 2008. The effects of parametric uncertainties on calculations of the balance of incoming and outgoing radiation are found to be spatially and temporally dependent. Regional uncertainty contributions of opposite sign cancel in global-mean forcing calculations, masking the regional importance of some parameters. Parameters that contribute little to uncertainty in Earth's global energy balance during recent decades make significant contributions to regional forcing variance. Aerosol forcing sensitivities are quantified within 11 climatically important regions, where surface temperatures are thought to influence large-scale climate effects. Substantial simulated uncertainty in CAE forcing in the eastern Pacific leaves open the possibility that apparent shifts in the mean ENSO state may result from a forced aerosol signal on multidecadal time scales. A likely negative aerosol CAE forcing in the tropical North Atlantic calls into question the relationship between Northern Hemisphere aerosol emission reductions and CAE forcing of sea surface temperatures in the main Atlantic hurricane development region on decadal time scales. Simulated CAE forcing uncertainty is large in the North Pacific, suggesting that the role of the CAE in altering Pacific tropical storm frequency and intensity is also highly uncertain.

show abstract

supporting

confidence: 78%

Section: ) Asian Summer Monsoonmentioning

confidence: 99%

The Climatic Importance of Uncertainties in Regional Aerosol–Cloud Radiative Forcings over Recent Decades

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Over the Indian region, the contribution to net cooling by sulfate aerosols is much larger than over other parts of the world (Verma et al 2012). Estimates of monthly mean direct radiative forcing from sulfate aerosols using a coarse resolution model over India is high in December and January (−3.5 and −2.3 W m −2 ), is moderate from February to April and November (−1.3 to −1.5 W m −2 ) and low during May-October (−0.4 to −0.6 W m −2 ) (Venkataraman et al 1999 (Verma et al 2013). Aerosols originating from India, Africa, and West Asia lead to the reduction of total surface radiation by 40-60% (−3 to 8 W m −2 ) over the Indian subcontinent and adjoining ocean (Verma et al 2011).…”

Section: Radiative Forcing Due To Differentmentioning

confidence: 99%