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Trace gases and CO sub(2) isotope records from Cabo de Rama, India

DRS at CSIR-National Institute of Oceanography

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Title Trace gases and CO sub(2) isotope records from Cabo de Rama, India
 
Creator Bhattacharya, S.K.
Borole, D.V.
Francey, R.J.
Allison, C.E.
Steele, L.P.
Krummel, P.
Langenfelds, R.
Masarie, K.A.
Tiwari, Y.K.
Patra, P.K.
 
Subject Trace gases
Cabo de Rama
seasonal variation
greenhouse gases
 
Description Concentrations of carbon dioxide (CO sub(2)), methane (CH sub(4)), carbon monoxide (CO), nitrous oxide (N sub(2) O) and hydrogen (H sub(2)), and the stable carbon (delta sup(13) C- CO sub(2)) and oxygen ( delta sup(18) O - CO sub(2)) isotopic composition of CO sub(2) have been measured in air samples collected from Cabo de Rama (CRI), India, for the period 1993–2002. The observations show clear signatures of Northern and Southern Hemispheric (NH and SH) air masses, mixed with their regional fluxes and chemical loss mechanisms, resulting in complex seasonal variation of these gases. The CRI measurements are compared with remote marine sites at Seychelles and Mauna Loa. Simulations of two major anthropogenic greenhouse gases (CO sub(2) and CH sub(4)) concentrations using a chemistry-transport model for the CRI site suggest that globally optimized fluxes can produce results comparable to the observations. We discuss that CRI observations have provided critical guidance in optimizing the fluxes to constrain the regional source/ sinks balance.
 
Date 2009-11-16T11:07:51Z
2009-11-16T11:07:51Z
2009
 
Type Journal Article
 
Identifier Current Science, vol.97(9); 1336-1344
http://drs.nio.org/drs/handle/2264/3434
 
Language en
 
Publisher Current Science Association