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Lookup NU author(s): Dr Jonathan Barnes,
Professor Robert Upstill-Goddard
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We measured dissolved N2O, CH4, O-2, NH4+, NO3- and NO2- on 7 transects along the polluted Adyar River-estuary, SE India and estimated N2O and CH4 emissions using a gas exchange relation and a floating chamber. High NO2- implied some nitrification of a large anthropogenic NH4+ pool. In the lower catchment CH4 was maximal (6.3+/-4.3 x 10(4) nM), exceeding the ebullition threshold, whereas strong undersaturation of N2O and O-2 implied intense denitrification. Emissions fluxes for the whole Adyar system similar to 2.5 x 10(8) g CH4 yr(-1) and similar to 2.4 x 10(6) g N2O yr(-1) estimated with a gas exchange relation and similar to 2 x 10(9) g CH4 yr(-1) derived with a floating chamber illustrate the importance of CH4 ebullition. An equivalent CO2 flux similar to 1-10 x 10(10) g yr(-1) derived using global warming potentials is equivalent to total Chennai motor vehicle CO2 emissions in one month. Studies such as this may inform More effective waste management and future compliance with international emissions agreements. (C) 2008 Elsevier Ltd. All rights reserved.
Author(s): Rajkumar AN, Barnes J, Ramesh R, Purvaja R, Upstill-Goddard RC
Publication type: Article
Publication status: Published
Journal: Marine Pollution Bulletin
ISSN (print): 0025-326X
ISSN (electronic): 1879-3363
Publisher: Elsevier Ltd
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