Seminars / Lectures
New Book by IITM
REAL TIME FORECAST
High resolution air quality forecast at 400 meter over Delhi
Air quality forecast at 10 km over North India
IITM Publication Highlights
Fingerprint of volcanic forcing on the ENSO–Indian monsoon coupling
The study findings show that LVEs promote a significantly enhanced phase-synchronization of the ENSO and IM oscillations, due to an increase in the angular frequency of ENSO. The results also shed innovative insights into the physical mechanism underlying the LVE-induced enhancement of ENSO-IM coupling and strengthen the prospects for improved seasonal monsoon predictions.
(M. Singh, R. Krishnan et al. Science Advances, September 2020, DOI: 10.1126/sciadv.aba8164
Prediction of Extreme Events: Current Status and Future Pathways against the Backdrop of Climate Change
Against the backdrop of increasingly frequent extreme precipitation events and the increasing severity of tropical cyclones, it is time to evaluate current forecast systems and develop pathways for improving the accuracy and reliability of predicting these high impact weather events in a changing climate. Even though the existing forecast systems of India provides useful guidance in extended range (2~3 weeks) and short range forecast up to ~10 days, the skill of high resolution operational forecast system GFS for extreme rain is found tobe around 3~5 days. There is a need to enhance the forecast skill beyond ~7 days particularly for extreme events. Keeping these societal aspects in to account, the joint international workshop on “Prediction Skill of Extreme Precipitation Events and Tropical Cyclones: Present Status and Future Prospects (IP4), & Climate Change” was held during 25-28 November 2019 at the Indian Institute of Tropical Meteorology, Pune.
(Parthasarathi Mukhopadhyay, R. Krishnan et al. Bulletin of the American Meteorological Society, July 2020, DOI:10.1175/BAMS-D-20-0037.1)
Enhancing Accuracy of Air Quality and Temperature Forecasts During Paddy Crop Residue Burning Season in Delhi Via Chemical Data Assimilation
A large increase in aerosol loading due to MODIS AOD assimilation reduces average daytime downward solar radiation reaching the surface by ~100 W/m2, planetary boundary layer height by ~600 m, and surface temperature by ~2 K particularly over the Indo‐Gangetic Plain with the largest impact in Punjab, Haryana, Delhi, and Uttar Pradesh. The comparison of model with surface temperature observations shows that improved air quality forecast reduced mean bias in surface temperature forecast by 17%, 30%, and 26% on the first, second and third days of the forecast, respectively. Aerosol‐radiation feedback extends the benefits of assimilating satellite AOD beyond PM2.5 forecasts to surface temperature forecast with a reduction in the mean bias of 0.9–1.5°C (17–30%).
(Rajesh Kumar, Sachin D. Ghude et al. Journal of Geophysical Research: Atmospheres, September 2020, DOI: 10.1029/2020JD033019)
Sub micron aerosol variability and its ageing process at a high altitudesite in India: Impact of meteorological conditions
The effect of relative humidity and temperature on the submicron aerosol variability and its ageing process was studied over a high altitude site, Mahabaleshwar in south-west India. The mass composition of non-refractory particulate matter of 1 μm (NR-PM1) size was obtained using Time of Flight Aerosol Chemical Speciation Monitor (ToF-ACSM) along with the measurements on a few trace gases during winter (December 2017–February 2018) and summer season (20th March - 5th May 2018). Sulfate exhibited strong dependence on the relative humidity (RH) as its mass fraction increased with the increase in RH.
(Mukherjee S., Singla V. et al. Environmental Pollution, October 2020, DOI:10.1016/j.envpol.2020.115019)
New Publications
Development of a probabilistic early health warning system based on meteorological parameters
Sahai A.K., Mandal R., Joseph S., Saha S., Awate P., Dutta S., Dey Avijit, Chattopadhyay R., Phani R., Pattanaik D.R., Despande S., Scientific Reports, 10:14741, September 2020, DOI:10.1038/s41598-020-71668-6, 1-13
Signatures of monsoon intra-seasonal oscillation and stratiform process in rain isotope variability in northern Bay of Bengal and their simulation by isotope enabled general circulation model
Sengupta S., Bhattacharya S.K., Parekh A., Nimya S.S., Yoshimura K., Sarkar A., Climate Dynamics, 55, September 2020, DOI:10.1007/s00382-020-05344-w, 1649–1663
Sub-synoptic circulation variability in the Himalayan extreme precipitation event during June 2013
Vellore R.K., Bisht J.S., Krishnan R., Umakanth U., Di Capua G., Meteorology and Atmospheric Physics, 132, October 2020, DOI:10.1007/s00703-019-00713-5, 631–665
Spatiotemporal variability and evolution of day and night winter fog over the Indo Gangetic Basin using INSAT-3D and comparison with surface visibility and aerosol optical depth
Banerjee S., Padmakumari B., Science of the Total Environment, 745: 140962, November 2020, DOI:10.1016/j.scitotenv.2020.140962, 1-13
IITM Events
MoES Webinar Series: Earth Sciences Popular Lectures
As an initiative by Ministry of Earth Sciences (MoES), DESK at IITM Pune (MoES) is organizing "Earth Sciences Popular Lectures" webinar series in coordination with MoES & its Institutions.
World OzoneDay – 2020
IITM-ENVIS, Pune and TERRE Policy Center, Pune have jointly organised "National Level Online Competitions" for students & common people to raise the awareness on protection of the Ozone Layer.
International Workshop on Prediction skill of extreme Precipitation events and tropical cyclones: Present status and future Prospect (IP4) [25-28 Novermber 2019].
International Conference on Climate Services 6 (11th to 13th February)
As a part of the International Conference on Climate Services (ICCS 6) which is being organized at the Indian Institute of Tropical Meteorology (IITM) Pune from February 11 to February 13, 2020, a SIDE EVENT on SCALING UP OF CLIMATE SERVICES THROUGH POLICY AND COMMUNICATIONS is organized by VIGYAN PRASAR and IITM.