Seasonal variation of evapotranspiration and its effect on the surface energy budget closure at a tropical forest over north-east India

Burman, Pramit Kumar Deb; Sarma, Dipankar; Morrison, Ross ORCID: https://orcid.org/0000-0002-1847-3127; Karipot, Anandakumar; Chakraborty, Supriyo. 2019 Seasonal variation of evapotranspiration and its effect on the surface energy budget closure at a tropical forest over north-east India. Journal of Earth System Science, 128 (5), 127. 21, pp. https://doi.org/10.1007/s12040-019-1158-x

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Official URL: https://doi.org/10.1007/s12040-019-1158-x

Abstract/Summary

This study uses one year of eddy covariance flux observations to investigate seasonal variations in evapotranspiration and surface energy budget closure at a tropical semi-deciduous forest located in north east India. The annual cycle is divided into four seasons, namely: pre-monsoon, monsoon, post-monsoon, and winter. The highest energy balance closure (76%) is observed during pre-monsoon, whereas the lowest level of closure (62%) is observed during winter. Intermediate closure of 68% and 72% is observed during monsoon and post-monsoon seasons, respectively. Maximum latent heat flux during winter (150 W m-2) is half of the maximum latent heat (300 W m-2) flux during monsoon. Evapotranspiration is a controlling factor of surface energy budget closure, with highest rates of closure corresponding to the periods of highest evapotranspiration. The Bowen ratio ranges from 0.93 in winter to 0.27 during monsoon. This is the first time the role of evapotranspiration in the seasonal variation of surface energy budget closure has been reported for any ecosystem in north-east India using eddy covariance measurements.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1007/s12040-019-1158-x
UKCEH and CEH Sections/Science Areas:	Hydro-climate Risks (Science Area 2017-)
ISSN:	0253-4126
Additional Information. Not used in RCUK Gateway to Research.:	Publisher link (see Related URLs) provides a read-only full-text copy of the published paper.
Additional Keywords:	eddy covariance, Indian summer monsoon, MetFlux India, surface energy budget, tropical forest, India
NORA Subject Terms:	Meteorology and Climatology Atmospheric Sciences
Related URLs:	Publisher
Date made live:	15 May 2019 10:13 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/523335

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1007/s12040-019-1158-x

UKCEH and CEH Sections/Science Areas:

Hydro-climate Risks (Science Area 2017-)

ISSN:

0253-4126

Additional Information. Not used in RCUK Gateway to Research.:

Publisher link (see Related URLs) provides a read-only full-text copy of the published paper.

Additional Keywords:

eddy covariance, Indian summer monsoon, MetFlux India, surface energy budget, tropical forest, India