Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea
We calculate net community production (NCP) during summer 2005-2006 and spring 2006 in the Ross Sea using multiple approaches to determine the magnitude and consistency of rates. Water column carbon and nutrient inventories and surface ocean O2/Ar data are compared to satellite-derived primary produ...
Main Authors: | , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
2011
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.818033 https://doi.org/10.1594/PANGAEA.818033 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818033 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818033 2024-09-15T17:40:23+00:00 Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea Long, Matthew C Dunbar, Robert B Tortell, Philippe Daniel Smith, Walker O Jr Mucciarone, David A DiTullio, Giacomo R MEDIAN LATITUDE: -76.375956 * MEDIAN LONGITUDE: 176.114051 * SOUTH-BOUND LATITUDE: -77.866000 * WEST-BOUND LONGITUDE: 165.250000 * NORTH-BOUND LATITUDE: -74.666000 * EAST-BOUND LONGITUDE: -170.000000 * DATE/TIME START: 2005-12-28T14:06:00 * DATE/TIME END: 2006-11-29T00:00:00 2011 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.818033 https://doi.org/10.1594/PANGAEA.818033 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.818033 https://doi.org/10.1594/PANGAEA.818033 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Long, Matthew C; Dunbar, Robert B; Tortell, Philippe Daniel; Smith, Walker O Jr; Mucciarone, David A; DiTullio, Giacomo R (2011): Vertical structure, seasonal drawdown, and net community production in the Ross Sea, Antarctica. Journal of Geophysical Research, 116(C10), C10029, https://doi.org/10.1029/2009JC005954 International Polar Year (2007-2008) IPY dataset publication series 2011 ftpangaea https://doi.org/10.1594/PANGAEA.81803310.1029/2009JC005954 2024-07-24T02:31:21Z We calculate net community production (NCP) during summer 2005-2006 and spring 2006 in the Ross Sea using multiple approaches to determine the magnitude and consistency of rates. Water column carbon and nutrient inventories and surface ocean O2/Ar data are compared to satellite-derived primary productivity (PP) estimates and 14C uptake experiments. In spring, NCP was related to stratification proximal to upper ocean fronts. In summer, the most intense C drawdown was in shallow mixed layers affected by ice melt; depth-integrated C drawdown, however, increased with mixing depth. Delta O2/Ar-based methods, relying on gas exchange reconstructions, underestimate NCP due to seasonal variations in surface Delta O2/Ar and NCP rates. Mixed layer Delta O2/Ar requires approximately 60 days to reach steady state, starting from early spring. Additionally, cold temperatures prolong the sensitivity of gas exchange reconstructions to past NCP variability. Complex vertical structure, in addition to the seasonal cycle, affects interpretations of surface-based observations, including those made from satellites. During both spring and summer, substantial fractions of NCP were below the mixed layer. Satellite-derived estimates tended to overestimate PP relative to 14C-based estimates, most severely in locations of stronger upper water column stratification. Biases notwithstanding, NCP-PP comparisons indicated that community respiration was of similar magnitude to NCP. We observed that a substantial portion of NCP remained as suspended particulate matter in the upper water column, demonstrating a lag between production and export. Resolving the dynamic physical processes that structure variance in NCP and its fate will enhance the understanding of the carbon cycling in highly productive Antarctic environments. Other/Unknown Material Antarc* Antarctic Antarctica Journal International Polar Year IPY Ross Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(165.250000,-170.000000,-74.666000,-77.866000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Long, Matthew C Dunbar, Robert B Tortell, Philippe Daniel Smith, Walker O Jr Mucciarone, David A DiTullio, Giacomo R Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
We calculate net community production (NCP) during summer 2005-2006 and spring 2006 in the Ross Sea using multiple approaches to determine the magnitude and consistency of rates. Water column carbon and nutrient inventories and surface ocean O2/Ar data are compared to satellite-derived primary productivity (PP) estimates and 14C uptake experiments. In spring, NCP was related to stratification proximal to upper ocean fronts. In summer, the most intense C drawdown was in shallow mixed layers affected by ice melt; depth-integrated C drawdown, however, increased with mixing depth. Delta O2/Ar-based methods, relying on gas exchange reconstructions, underestimate NCP due to seasonal variations in surface Delta O2/Ar and NCP rates. Mixed layer Delta O2/Ar requires approximately 60 days to reach steady state, starting from early spring. Additionally, cold temperatures prolong the sensitivity of gas exchange reconstructions to past NCP variability. Complex vertical structure, in addition to the seasonal cycle, affects interpretations of surface-based observations, including those made from satellites. During both spring and summer, substantial fractions of NCP were below the mixed layer. Satellite-derived estimates tended to overestimate PP relative to 14C-based estimates, most severely in locations of stronger upper water column stratification. Biases notwithstanding, NCP-PP comparisons indicated that community respiration was of similar magnitude to NCP. We observed that a substantial portion of NCP remained as suspended particulate matter in the upper water column, demonstrating a lag between production and export. Resolving the dynamic physical processes that structure variance in NCP and its fate will enhance the understanding of the carbon cycling in highly productive Antarctic environments. |
format |
Other/Unknown Material |
author |
Long, Matthew C Dunbar, Robert B Tortell, Philippe Daniel Smith, Walker O Jr Mucciarone, David A DiTullio, Giacomo R |
author_facet |
Long, Matthew C Dunbar, Robert B Tortell, Philippe Daniel Smith, Walker O Jr Mucciarone, David A DiTullio, Giacomo R |
author_sort |
Long, Matthew C |
title |
Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
title_short |
Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
title_full |
Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
title_fullStr |
Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
title_full_unstemmed |
Physical oceanography during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 to the Ross Sea |
title_sort |
physical oceanography during nathaniel b. palmer cruises nbp06-01 and nbp06-08 to the ross sea |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.818033 https://doi.org/10.1594/PANGAEA.818033 |
op_coverage |
MEDIAN LATITUDE: -76.375956 * MEDIAN LONGITUDE: 176.114051 * SOUTH-BOUND LATITUDE: -77.866000 * WEST-BOUND LONGITUDE: 165.250000 * NORTH-BOUND LATITUDE: -74.666000 * EAST-BOUND LONGITUDE: -170.000000 * DATE/TIME START: 2005-12-28T14:06:00 * DATE/TIME END: 2006-11-29T00:00:00 |
long_lat |
ENVELOPE(165.250000,-170.000000,-74.666000,-77.866000) |
genre |
Antarc* Antarctic Antarctica Journal International Polar Year IPY Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Journal International Polar Year IPY Ross Sea |
op_source |
Supplement to: Long, Matthew C; Dunbar, Robert B; Tortell, Philippe Daniel; Smith, Walker O Jr; Mucciarone, David A; DiTullio, Giacomo R (2011): Vertical structure, seasonal drawdown, and net community production in the Ross Sea, Antarctica. Journal of Geophysical Research, 116(C10), C10029, https://doi.org/10.1029/2009JC005954 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.818033 https://doi.org/10.1594/PANGAEA.818033 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81803310.1029/2009JC005954 |
_version_ |
1810486414097252352 |