Spatial and temporal variability in energy and water vapour fluxes observed at seven sites on the Indian subcontinent during 2017

Bhat, G S and Morrison, R and Taylor, C M and Bhattacharya, B K and Paleri, S and Desai, D and Evans, J G and Pattnaik, S and Sekhar, M and Nigam, R and Sattar, A and Angadi, S S and Kacha, D and Patidar, A and Tripathi, S N and Krishnan, K V M and Sisodiya, A (2019) Spatial and temporal variability in energy and water vapour fluxes observed at seven sites on the Indian subcontinent during 2017. In: QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY .

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Abstract

Under the INCOMPASS project, state of the art eddy-covariance based surface flux measurement systems were installed at eight locations across India. These sites cover different climatic conditions, land use and land cover, and water management practices. Here we present the initial analysis of the measurements taken at seven sites mainly focusing on the year 2017, quantifying for the first time the remarkable contrasts in evaporative fraction across the seasons, climate zones and land management practices of the Indian subcontinent. With the exception of Jaisalmer which is the driest of the places studied, all the sites maintain values of evaporative fraction above 0.5 after the monsoon through to November. By contrast, for those sites with natural vegetation or rain-fed agriculture, evaporative fraction remains below 0.3 for the dry January-May period. In the middle Gangetic Plain area, irrigation and pre-monsoon showers together maintain evaporative fraction above 0.5 between January and June. It is also observed that different variables exhibit different intraseasonal variation characteristics even at one site. Except for Samastipur which is situated in the middle Indo-Gangetic Plains, wind speed shows spectral peak at a smaller time-scale compared to sensible and latent heat fluxes.

Item Type:	Journal Article
Publication:	QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
Publisher:	WILEY
Additional Information:	Copyright of this article belongs to WILEY
Keywords:	eddy-covariance flux; Indian monsoon; land-surface processes; evaporative fraction; surface energy balance; surface fluxes
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	30 Dec 2019 10:45
Last Modified:	30 Dec 2019 10:45
URI:	http://eprints.iisc.ac.in/id/eprint/64192

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