Organic carbon in Antarctic snow: spatial trends and possible sources
Organic carbon records in Antarctic snow are sparse despite the fact that it is of great significance to global carbon dynamics, snow photochemistry, and air–snow exchange processes. Here, surface snow total organic carbon (TOC) along with sea-salt Na sup(+), dust, and microbial load of two geograph...
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ftnio:oai:dsr.nio.org:2264/3984 2023-05-15T13:59:28+02:00 Organic carbon in Antarctic snow: spatial trends and possible sources Antony, R. Mahalinganathan, K. Thamban, M. Nair, S. 2011 http://drs.nio.org/drs/handle/2264/3984 en eng American Chemical Society © 2011 American Chemical Society organic carbon snow spatial variations microorganisms Journal Article 2011 ftnio 2012-08-25T20:10:21Z Organic carbon records in Antarctic snow are sparse despite the fact that it is of great significance to global carbon dynamics, snow photochemistry, and air–snow exchange processes. Here, surface snow total organic carbon (TOC) along with sea-salt Na sup(+), dust, and microbial load of two geographically distinct traverses in East Antarctica are presented, viz. Princess Elizabeth Land (PEL, coast to 180 km inland, Indian Ocean sector) and Dronning Maud Land (DML, 110–300 km inland, Atlantic Ocean sector). TOC ranged from 88 + or -4 to 928 + or -21 mu g L sup(-1) in PEL and 13 + or -1 to 345 + or -6 mu g L sup(-1) in DML. TOC exhibited considerable spatial variation with significantly higher values in the coastal samples (p<0.001), but regional variation was insignificant within the two transects beyond 100 km (p>0.1). Both distance from the sea and elevation influenced TOC concentrations. TOC also showed a strong positive correlation with sea-salt Na sup(+) (p<0.001). In addition to marine contribution, in situ microorganisms accounted for 365 and 320 ng carbon L sup(-1) in PEL and DML, respectively. Correlation with dust suggests that crustal contribution of organic carbon was marginal. Though TOC was predominantly influenced by marine sources associated with sea-spray aerosols, local microbial contributions were significant in distant locations having minimal sea-spray input. Article in Journal/Newspaper Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Princess Elizabeth Land National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Antarctic Dronning Maud Land East Antarctica Indian Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
organic carbon snow spatial variations microorganisms |
spellingShingle |
organic carbon snow spatial variations microorganisms Antony, R. Mahalinganathan, K. Thamban, M. Nair, S. Organic carbon in Antarctic snow: spatial trends and possible sources |
topic_facet |
organic carbon snow spatial variations microorganisms |
description |
Organic carbon records in Antarctic snow are sparse despite the fact that it is of great significance to global carbon dynamics, snow photochemistry, and air–snow exchange processes. Here, surface snow total organic carbon (TOC) along with sea-salt Na sup(+), dust, and microbial load of two geographically distinct traverses in East Antarctica are presented, viz. Princess Elizabeth Land (PEL, coast to 180 km inland, Indian Ocean sector) and Dronning Maud Land (DML, 110–300 km inland, Atlantic Ocean sector). TOC ranged from 88 + or -4 to 928 + or -21 mu g L sup(-1) in PEL and 13 + or -1 to 345 + or -6 mu g L sup(-1) in DML. TOC exhibited considerable spatial variation with significantly higher values in the coastal samples (p<0.001), but regional variation was insignificant within the two transects beyond 100 km (p>0.1). Both distance from the sea and elevation influenced TOC concentrations. TOC also showed a strong positive correlation with sea-salt Na sup(+) (p<0.001). In addition to marine contribution, in situ microorganisms accounted for 365 and 320 ng carbon L sup(-1) in PEL and DML, respectively. Correlation with dust suggests that crustal contribution of organic carbon was marginal. Though TOC was predominantly influenced by marine sources associated with sea-spray aerosols, local microbial contributions were significant in distant locations having minimal sea-spray input. |
format |
Article in Journal/Newspaper |
author |
Antony, R. Mahalinganathan, K. Thamban, M. Nair, S. |
author_facet |
Antony, R. Mahalinganathan, K. Thamban, M. Nair, S. |
author_sort |
Antony, R. |
title |
Organic carbon in Antarctic snow: spatial trends and possible sources |
title_short |
Organic carbon in Antarctic snow: spatial trends and possible sources |
title_full |
Organic carbon in Antarctic snow: spatial trends and possible sources |
title_fullStr |
Organic carbon in Antarctic snow: spatial trends and possible sources |
title_full_unstemmed |
Organic carbon in Antarctic snow: spatial trends and possible sources |
title_sort |
organic carbon in antarctic snow: spatial trends and possible sources |
publisher |
American Chemical Society |
publishDate |
2011 |
url |
http://drs.nio.org/drs/handle/2264/3984 |
long_lat |
ENVELOPE(80.367,80.367,-68.500,-68.500) |
geographic |
Antarctic Dronning Maud Land East Antarctica Indian Princess Elizabeth Land |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Indian Princess Elizabeth Land |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Princess Elizabeth Land |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Princess Elizabeth Land |
op_rights |
© 2011 American Chemical Society |
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1766268036089643008 |