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Surface energy balance and its closure in arid grassland ecosystems: A case study over Thar desert

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Title Surface energy balance and its closure in arid grassland ecosystems: A case study over Thar desert
Not Available
 
Creator P. RAJA
B.K. BHATTACHARYA
NILENDU SINGH
NK Sinha
J.P. SINGH
C.B. PANDEY,
J.S. PARIHAR
M.M. ROY
 
Subject Micrometeorology
grassland
Thar desert
 
Description Not Available
A complete annual cycle of micrometeorological measurements were carried out to characterize the dynamics of
radiation and energy balance over a grassland ecosystem at Central Arid Zone Research Institute experimental
area at Chandan, Jaisalmer, India from INSAT-linked ISRO-AMS (Agro-Met Station). The daytime average dekadal
latent flux for actual evapotranspiration (AET) showed substantially lower magnitude (15-115 Wm-2) (AET: 0.3
mmd-1 to 2.5 mmd-1) with prominent peak coincident to south-west monsoon and peak growth stage. Sensible
heat fluxes showed a large variation from 54 to 340 Wm-2 with peak during summer and minimum during winter
and monsoon seasons. More than 70% energy balance closure (EBC) was observed. The non-closure of energy
balance periods were characterized by strong local advections in summer. The daytime average net radiation
showed bimodal behavior (195 to 420 Wm-2) with primary peak in spring-summer and secondary peak coincident
to the start of the withdrawal of south-west monsoon. Significant complementary exponential relation (Y=0.045
e12.13X, R2
= 0.65) was found between dekadal albedo and Bowen ratio which was generally high (1.5 to 5.3) with
intermittent dips (0.3 to 1.3) coincident to wet spells. Similarly, the dekadal albedo showed a higher magnitude
(0.15 to 0.39), recording the highest (0.39) in the month of April and the lowest (0.15) in the month of September
post-monsoon period when green grass growth was maximum.
Not Available
 
Date 2021-07-16T09:28:55Z
2021-07-16T09:28:55Z
2013-03-31
 
Type Research Paper
 
Identifier Raja, P., Bhattacharya, B. K., Singh, N., Sinha, N. K., Singh, J. P., Pandey, C. B., ... & Roy, M. M. (2013). Surface energy balance and its closure in arid grassland ecosystem: a case study over Thar Desert. J Agrometeorol Spl, (1), 94-99.
0972-1665
http://krishi.icar.gov.in/jspui/handle/123456789/48451
 
Language English
 
Relation Not Available;
 
Publisher Association of Agrometeorologists