eprintid: 116
rev_number: 10
eprint_status: archive
userid: 6
dir: disk0/00/00/01/16
datestamp: 2011-07-28 09:07:44
lastmod: 2011-07-28 09:09:26
status_changed: 2011-07-28 09:07:44
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
item_issues_count: 0
creators_name: Rao, A V R K
creators_name: Wani, S P
icrisatcreators_name: Rao, A V R K
icrisatcreators_name: Wani, S P
affiliation: ICRISAT(Patancheru)
country: India
title: Evapotranspiration paradox at a semi-arid location in India
ispublished: pub
subjects: s2.14
full_text_status: restricted
keywords: Reference crop evapotranspiration; semi-arid tropics; gtrends; watershed
agrotags: <b>Agrotags</b>     - NOT-AVAILABLE<br><b>Fishtags</b>    - NOT-AVAILABLE<br><b>Geopoliticaltags</b> - NOT-AVAILABLE
note: The financial support provided by Sir Dorabji Tata Trust; Sir Ratan Tata Trust is gratefully acknowledged
abstract: Paradox of decreasing evaporation and evapotranspiration under increasing temperature conditions
in the semi-arid tropics assumes greater importance as agriculture in these areas is more vulnerable to
climate change. Trends in annual reference crop evapotranspiration (ETo) at Patancheru, Andhra Pradesh
indicated a reduction of about 200 mm from 1850 mm to 1650 mm during the past 35 years. Contribution of
energy balance term to the total ETo has shown an increasing trend while aerodynamic term has a
decreasing trend. Wind speed has shown a strong negative trend leading to the dramatic fall of the
aerodynamic term and consequently the ETo. Rate of reduction in evapotranspiration demand was about
10% for kharif (Jun-Oct) and about 14% for rabi (Nov-Feb). At Patancheru, measured temperature and solar
radiation showed opposite trends and at locations where no measured solar radiation data available and if
solar radiation is estimated from air temperature alone for use as an input in crop modelling, outputs under
such conditions need to be interpreted with caution. Present study highlights the need for climate change
impact studies at a local level in addition to those based on regional and global circulation models.
date: 2011
date_type: published
publication: Journal of Agrometeorology
volume: 13
number: 1
publisher: Association of Agrometeorologists
pagerange: 3-8
refereed: TRUE
issn: 0972-1665
related_url_url: http://scholar.google.co.in/scholar?hl=en&q=allintitle%3A+%22Evapotranspiration+paradox+at+a+semi-arid+location+in+India%22&btnG=Search&as_sdt=0%2C5&as_ylo=&as_vis=0
related_url_type: author
funders: Sir Dorabji Tata Trust
funders: Sir Ratan Tata Trust
citation:   Rao, A V R K and Wani, S P  (2011) Evapotranspiration paradox at a semi-arid location in India.  Journal of Agrometeorology, 13 (1).  pp. 3-8.  ISSN 0972-1665     
document_url: http://oar.icrisat.org/116/1/JouAgromet13_1_3-8_2011.pdf