NDLI: Influence of meteorological parameters on atmospheric CO2 at Bharati, the Indian Antarctic research station

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Volume 37, 2018

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Influence of meteorological parameters on atmospheric CO2 at Bharati, the Indian Antarctic research station

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Influence of meteorological parameters on atmospheric CO2 at Bharati, the Indian Antarctic research station

Content Provider	Taylor & Francis Online
Author	Choudhury, Saroj Bandh Pathakoti, Mahesh Syamala, Prijith Sudhakaran Dadhwal, Vinay Kumar Gaddamidi, Sreenivas Gharai, Biswadip Rao, Pamaraju Venkata Narasimha Raghavendra, Kaila Venkata
Abstract	During the 35th Indian Scientific Expedition to Antarctica, measurements of atmospheric carbon dioxide (CO2) were carried out using a Li-Cor CO2/H2O analyser at Bharati, the Indian Antarctic research station. This study examines the short-term variability of atmospheric CO2 during the austral summer (January–February) of 2016. An average of 396.25 ± 4.20 ppm was observed during the study period. Meteorological parameters such as relative humidity, precipitation, wind speed, air temperature and atmospheric boundary layer height in conjunction with photosynthetically active radiation, the biological activity indicator which modulates atmospheric CO2 concentration have been investigated. High wind speed (>20 m s−1) combined with precipitation scavenges CO2 in the atmosphere, resulting in low concentrations at the study site. The lowest CO2 concentration of 385 ppm coincided with heavy precipitation of 15 mm during study period. Statistical analysis of the data shows that precipitation and relative humidity independently correlated 55% (r = −0.55) and 32% (r = −0.32), respectively, with the variability of CO2 mixing in the atmosphere at the study site. Atmospheric CO2 was significantly correlated with precipitation alone with a p value of 0.003. Further, multiple regression analysis was performed to test the significant relation between variability of atmospheric CO2 and meteorological parameters. Long-range air-mass transport analysis depicted that the majority of the air masses are reaching the study site through the oceanic region.
File Format	PDF HTM / HTML
ISSN	17518369
DOI	10.1080/17518369.2018.1442072
Journal	Polar Research
Volume Number	37
Issue Number	1
Language	English
Publisher	Routledge
Publisher Date	2018-03-13
Access Restriction	Open
Subject Keyword	Carbon dioxide Li-Cor CO2/H2O analyser Precipitation Relative humidity Wind speed Long-range air-mass transport AT: air temperature BLH: atmospheric boundary layer height CH4: methane CO2: carbon dioxide H2O: water vapour NRSC: National Remote Sensing Centre PAR: photosynthetically active radiation RH: relative humidity WS: wind speed
Content Type	Text
Resource Type	Article
Subject	1900/1901 Environmental Chemistry Environmental Science Oceanography

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