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dc.contributor.authorChatterjee, A.
dc.contributor.authorHarth, C. M.
dc.contributor.authorSalameh, P. K.
dc.contributor.authorManning, Alistair J.
dc.contributor.authorHall, B. D.
dc.contributor.authorMuhle, Jens
dc.contributor.authorWeiss, R. F.
dc.contributor.authorO'Doherty, Simon
dc.contributor.authorYoung, D.
dc.contributor.authorGanesan, Anita Lakshmi
dc.contributor.authorPrinn, Ronald G.
dc.contributor.authorMeredith, Laura Kelsey
dc.date.accessioned2013-12-13T19:30:48Z
dc.date.available2013-12-13T19:30:48Z
dc.date.issued2013-11
dc.date.submitted2013-09
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/1721.1/82926
dc.description.abstractHigh-frequency atmospheric measurements of methane (CH[subscript 4]), nitrous oxide (N[subscript 2]O) and sulfur hexafluoride (SF[subscript 6]) from Darjeeling, India are presented from December 2011 (CH[subscript 4])/March 2012 (N[subscript 2]O and SF[subscript 6]) through February 2013. These measurements were made on a gas chromatograph equipped with a flame ionization detector and electron capture detector, and were calibrated on the Tohoku University, the Scripps Institution of Oceanography (SIO)-98 and SIO-2005 scales for CH[subscript 4], N[subscript 2]O and SF[subscript 6], respectively. The observations show large variability and frequent pollution events in CH[subscript 4] and N[subscript 2]O mole fractions, suggesting significant sources in the regions sampled by Darjeeling throughout the year. By contrast, SF[subscript 6] mole fractions show little variability and only occasional pollution episodes, likely due to weak sources in the region. Simulations using the Numerical Atmospheric dispersion Modelling Environment (NAME) particle dispersion model suggest that many of the enhancements in the three gases result from the transport of pollutants from the densely populated Indo-Gangetic Plains of India to Darjeeling. The meteorology of the region varies considerably throughout the year from Himalayan flows in the winter to the strong south Asian summer monsoon. The model is consistent in simulating a diurnal cycle in CH[subscript 4] and N[subscript 2]O mole fractions that is present during the winter but absent in the summer and suggests that the signals measured at Darjeeling are dominated by large-scale (~100 km) flows rather than local (<10 km) flows.en_US
dc.description.sponsorshipMassachusetts Institute of Technology. Center for Global Change Science (Director's Fund)en_US
dc.description.sponsorshipMassachusetts Institute of Technology. Joint Program on the Science & Policy of Global Changeen_US
dc.description.sponsorshipMartin Family Society of Fellows for Sustainabilityen_US
dc.description.sponsorshipMIT Energy Initiativeen_US
dc.description.sponsorshipMIT International Science and Technology Initiativeen_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Grant NNX11AF17G)en_US
dc.description.sponsorshipUnited States. National Oceanic and Atmospheric Administration (Contract RA133R09CN0062)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/acp-13-10633-2013en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicus GmbHen_US
dc.titleThe variability of methane, nitrous oxide and sulfur hexafluoride in Northeast Indiaen_US
dc.typeArticleen_US
dc.identifier.citationGanesan, A. L., A. Chatterjee, R. G. Prinn, C. M. Harth, P. K. Salameh, A. J. Manning, B. D. Hall, et al. “The variability of methane, nitrous oxide and sulfur hexafluoride in Northeast India.” Atmospheric Chemistry and Physics 13, no. 21 (November 4, 2013): 10633-10644.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Center for Global Change Scienceen_US
dc.contributor.mitauthorGanesan, Anita Lakshmien_US
dc.contributor.mitauthorPrinn, Ronald G.en_US
dc.contributor.mitauthorMeredith, Laura Kelseyen_US
dc.relation.journalAtmospheric Chemistry and Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsGanesan, A. L.; Chatterjee, A.; Prinn, R. G.; Harth, C. M.; Salameh, P. K.; Manning, A. J.; Hall, B. D.; Muhle, J.; Meredith, L. K.; Weiss, R. F.; O'Doherty, S.; Young, D.en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-5925-3801
mit.licensePUBLISHER_CCen_US


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