The role of iron as a micro-nutrient to the Antarctic sea-ice zone algal community - Casey Data
Entry ID:
ASAC_3026_Casey
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Summary
Abstract:
Public Description of the Project This project will assess the importance of the trace micro-nutrient element iron to Antarctic sea-ice algal communities during the International Polar Year (2007-2009). We will investigate the biogeochemistry of iron, including a comprehensive examination of its distribution, speciation, cycling and role in fuelling ice-edge phytoplankton blooms. A significant ... part of this research will concentrate on the the influence of organic exopolysaccharides on iron solubility, complexation and bioavailability, both within the ice and in surrounding snow and surface seawater. This innovative research will improve our understanding of key processes that control the productivity of the climatically-important Antarctic sea-ice zone.
Project objectives:
This project will assess the importance of the trace element iron (Fe) as a micro-nutrient to seasonal sea-ice algal communities in the Australian sector of Antarctica during the International Polar Year (2007-09). We will investigate the biogeochemistry of Fe, including a comprehensive examination of its distribution, speciation, cycling and role in fuelling ice-edge phytoplankton blooms. A significant part of this research will concentrate on the influence of organic exopolysaccharides (EPS) on Fe solubility and complexation (and hence bioavailability), both within the ice and in surrounding surface waters. This innovative research will improve our understanding of key processes that control the productivity of the climatically-important Antarctic sea-ice zone.
This metadata record describes data collected at Casey Station as part of project 3026.
Collected data from the time series experiment in sea ice near Casey station Antarctica (66 degrees 13 minutes 07 seconds S, 110 degrees 39 minutes 02 seconds E). Measurements were made at the same location during seven consecutive study days between 10 November and 2 December 2009. Variables measured were pFe (particulate Fe), TDFe (total dissolvable Fe), dFe (dissolved Fe), plFe (particulate leachable Fe), PON (particulate organic nitrogen), POC (particulate organic carbon), Chl a (Chlorophyll a), salinity, ice temperature, vb/v (brine volume fraction), mean daily air temperature, and max daily air temperature.
Measurements were taken on each study day of the snow directly overlying the sea ice (SNOW), a shallow and a deep brine (B- and B+, respectively), three sections of the sea ice core at median depths 3, 33, and 73 centimeters (SI1, SI2, and SI3, respectively) as well as two consecutive sections in the lower most basal ice (SI4 and SI5). Finally, four samples were taken of the underlying seawater at 0, 5, 10 and 15 m (SW0, SW5, SW10 and SW15, respectively). 
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Description:
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Geographic Coverage
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Spatial coordinates
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N: 90.0
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S: -90.0
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E: 180.0
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W: -180.0
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Data Set Citation
Dataset Originator/Creator:
DOD/USAF/AFWA > Air Force Weather Agency, U.S. Air Force, U.S. Department of DefenseDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp)
Dataset Title:
Values from Monitoring the Global Distribution of Clouds and Cloud Top Temperatures Twice Each Day - Day Time and Night Time
Dataset Release Date:
1992
Dataset Release Place:
Boulder, CO
Dataset Publisher:
National Geophysical Data Center
Version:
First
Online Resource:
http://www.ngdc.noaa.gov/dmsp
Access Constraints
ACCESS CONSTRAINTS: No Constraints
DISTRIBUTION LIABILITY: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
CUSTOM ORDER PROCESS: Contact data center for information
Use Constraints
None
Data Set Progress
IN WORK
Distribution
Distribution Size:
3.100000
Distribution Format:
ASCII
Fees:
Depends on the Data Set
Personnel
Role:
TECHNICAL CONTACT
Role:
DIF AUTHOR
Phone:
(303) 497-6133
Fax:
(303) 497-6513
Email:
Edward.H.Erwin at noaa.gov
Contact Address:
NOAA/NESDIS/NGDC
E/GC2
325 Broadway
City:
Boulder
Province or State:
CO
Postal Code:
80303
Country:
USA
Creation and Review Dates
DIF Creation Date:
2009-06-15
Last DIF Revision Date:
2011-03-10
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