Variations of energy fluxes with ENSO, IOD and intra seasonal variability of Indian summer monsoon over the Indian Monsoon region

Prasanta Kumar Bal, Hari Prasad Dasari, Narayan Prasad, Popat Salunke, Ruchi Singh Parihar

Research output: Contribution to journalArticlepeer-review

Abstract

Variations of energy fluxes with ENSO, IOD, and Intra-Seasonal Variability(ISV) of Indian Summer Monsoon Rainfall (ISMR) over the Indian monsoon region are examined using ECMWF Era Interim reanalysis over a period of 1979–2013. The composite anomalies of radiative fluxes, viz. shortwave and longwave, latent, and sensible heat as well as precipitation and winds are analyzed for the years associated with El Niño, La Niña, positive and negative IOD phases, active, and break phases of ISMRR with respect to the normal years. It is observed that, the lesser (more) precipitation over the region in the El Niño (La Niña) years is accompanied with enhanced (reduced) top of the atmosphere absorbed solar radiation and outgoing long wave radiation, as well as more (less) surface absorbed solar radiation, and surface sensible heat flux. During the positive IOD phase, enhanced convective activity and precipitation rainfall over the western Equatorial Indian Ocean, Arabian Sea, and west coast of India, with reduced rainfall over the eastern equatorial Indian ocean is accompanied with enhanced shortwave and long wave radiative fluxes over most parts of the Indian subcontinent. The conditions during the negative IOD phases are largely the opposite.
Original languageEnglish (US)
Pages (from-to)105645
JournalAtmospheric Research
DOIs
StatePublished - Apr 2021

ASJC Scopus subject areas

  • Atmospheric Science

Fingerprint

Dive into the research topics of 'Variations of energy fluxes with ENSO, IOD and intra seasonal variability of Indian summer monsoon over the Indian Monsoon region'. Together they form a unique fingerprint.

Cite this