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IITM Publication Highlights
Does increasing horizontal resolution improve seasonal prediction of Indian summer monsoon?: A climate forecast system model perspective
Climate Forecast System (CFSv2) hindcast for 39 years at two different resolutions namely, CFST126 and CFST382 is analysed. It is indicated that there is only a marginal improvement in the mean state of the model. However, no statistically significant change in the prediction skill is observed. Unlike the real atmosphere, the low and the high resolution model very closely follow convective quasi-equilibrium at daily timescales. It is hypothesised that the same convective parametrization scheme may not be suitable for different resolution of the model. To overcome this issue, a scale-aware or stochastic treatment of convection can be adopted
(Kumar Siddharth, Phani R., Mukhopadhyay P., Balaji C., Geophysical Research Letters, April 2022, DOI: 10.1029/2021GL097466, 1-11)
Increasing frequency of extremely severe cyclonic storms in the North Indian Ocean by anthropogenic warming and southwest monsoon weakening
This study identifies a mechanism for the increasing frequency of extremely severe and higher category cyclonic storms in the north Indian Ocean (NIO), with maximum frequency during May. NIO region is dominated by the summer monsoon circulation and as a result the sea surface temperature and potential intensity have a semi-annual cycle with peak during May.
(Swapna P., Sreeraj P., Narayanasetti S., Jyoti J., Krishnan R., Prajeesh A.G., Ayantika D.C., Singh Manmeet, Geophysical Research Letters, February 2022, DOI:10.1029/2021GL094650, 1-11)
Read MoreSeasonal abundances of primary and secondary carbonaceous aerosols at a high-altitude station in the Western Ghat Mountains, India
The combustion-related primary and secondary carbon particles have gained more importance in the recent past due to their radiative and chemical properties. The study deals with the results obtained from observations on Organic Carbon (OC) and Elemental Carbon (EC) during 2019–20 over a high-altitude location, Mahabaleshwar in the Western Ghats in peninsular India.
(Buchunde P.S., Safai P.D., Mukherjee S., Raju M.P., Meena G.S., Sonbawne S.M., Dani K.K., Pandithurai G., Air Quality Atmosphere and Health, February 2022, DOI:10.1007/s11869-021-01097-5, 209-220)
Read MoreMeridional displacement of the Asian jet and its impact on Indian summer monsoon rainfall in observations and CFSv2 hindcast
Influence of the meridional displacement of the Asian jet on East Asian summer monsoon is immensely documented but impact of the Asian jet variability on ISM rainfall is largely unexplored. In this study, diagnostic analyses are performed to investigate the relationship between the meridional displacement of Asian jet during boreal summer and the associated rainfall pattern over the ISM region on interannual time scales in observations and the coupled model CFSv2.
(Chowdary J.S., Vibhute A.S., Patekar P., Parekh A., Gnanaseelan C., Attada R., Climate Dynamics, February 2022, DOI:10.1007/s00382-021-05935-1, 811-829)
Read MoreLinkage between precipitation isotopes and biosphere-atmosphere interaction observed in northeast India
The intra-seasonal variation in precipitation isotopes shows a characteristic declining trend over northeast India. The study shows that the internal factors, such as the local land-atmosphere interactions, rather than the external influences, play a significant role in governing the precipitation isotopes in northeast India.
(Chakraborty S., Deb Burman P.K., Sarma D., Sinha N., Datye A., Metya A., Murkute C., Saha Subodh K., Sujith K., Gogoi N., Bora A., Maji S., Parua D.K., Bera S., npj Climate and Atmospheric Science, February 2022, DOI:10.1038/s41612-022-00231-z, 1-11)
Read MoreNew Publications
Benefits of satellite XCO2 and newly proposed atmospheric CO2 observation network over India in constraining regional CO2 fluxes
Halder Santanu., Tiwari Y.K., Valsala V., Sijikumar S., Janardanan R., Maksyutov S., Science of The Total Environment, March 2022, DOI:10.1016/j.scitotenv.2021.151508
Understanding the relationship of storm- to large-scale environment in the monsoon trough region: results inferred from long-term radar and reanalysis datasets
Jha A.K., Das Subrata Kumar, Deshpande S.M., Murali Krishna U.V., Quarterly Journal of the Royal Meteorological Society, January 2022, DOI:10.1002/qj.4194
Pathways of precipitation formation in different thermodynamic and aerosol environments over the Indian Peninsula
Kulkarni G., Patade S., Fan J., Prabhakaran Thara, Atmospheric Research, March 2022, DOI:10.1016/j.atmosres.2021.105934
A review of ocean-atmosphere interactions during tropical cyclones in the north Indian Ocean
Singh Vineet K., Roxy M.K., Earth Science Reviews, March 2022, DOI:10.1016/j.earscirev.2022.103967
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Lecture Series-Cloud and Precipitation Physics and Dynamics
(ongoing since Oct 2021)
The lecture series aims to understand cloud and precipitation processes through the latest state-of-the-art approaches to observe, simulate, and identify key uncertainties associated with aerosol-cloud-precipitation interactions. The lectures will be delivered by some of the world's leading and renowned scientists.
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International Monsoons Project Office (IMPO) is launched at IITM
(28 February 2022)
IMPO is a joint effort by the World Meteorological Organzation (WMO) and IITM to help coordinate the global monsoon research activities of the World Climate Research Programme (WCRP) and the World Weather Research Programme (WWRP).
International Women's Day 2022
(4-8 March 2022)
Theme: Gender equality today for a sustainable tomorrow (Online Webinars)
Watch webinar [4 March 2022]
Watch webinar [7 March 2022]
Watch webinar [8 March 2022]
World Meteorological Day 2022
(23rd March 2022)
A special session is being organised to mark World Meteorological Day 2022 on 23rd March 2022 during the 7th International Workshop on Monsoons IWM (under the World Weather Research Programme WWRP of the World Meteorological Organization WMO).