Sea Ice Mass Balance in the Antarctic - Argo Floats

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Sea Ice Mass Balance in the Antarctic - Argo Floats
Description:
Abstract:
Argo profiling floats were deployed during the SIMBA cruise. A total of 23 floats were deployed along the cruise track from Punta Arenas to the Bellingshausen Sea. These floats drifted at a depth of 1000 meters; at 10-day intervals, each float sank to a depth of 2000 m and then ascended to the sea surface over a period of approximately 6 hours, collecting a CTD profile as it ascended. Many of the floats were also equipped with dissolved oxygen sensors. Once on the sea surface, the floats transmitted their data to a satellite and descended again to 1000 m to begin another 10-day cycle. Each float was capable of collecting 200 or more profiles in this manner. The floats were equipped with ice-avoidance software in order to decrease the probability that they could be crushed by drifting ice while transmitting on the sea surface. As the floats ascended between depths of 50 and 30 meters, they examined the median temperature in this depth range; if the temperature was below a critical temperature that was indicative of ice cover above (chosen to be -1.77°C), the float turn off its buoyancy pump in order to stop its ascent. In such a case, the float decelerated and then stopped at a depth of about 3 meters; the float then stored the data collected and descended back to 1000 m. This process continued for as many profiles and 10-day intervals as necessary until the float was able to reach the sea surface, at which time it transmitted all stored profiles. Each float stored as many as 70 high-resolution profiles in this manner, or nearly 2 years’ worth of data. The floats all used the relatively high-bandwidth Iridium satellite system for communication. After the NB Palmer departed Punta Arenas, floats were deployed in Drake Passage and then along the ice edge, near the 2000 m isobath. A few floats were reprogrammed so that they can be deployed in shallower water on the shelf, where the ice cover is more permanent. Leading up to and during week 1 of field work (Sep 23-29) seventeen expendable bathythermographs (XBTs) were deployed in conjunction with 17 Argo floats between 62 south and 69S. The remaining floats were deployed in conjunction with a CTD cast from the vessel. The main goal of this work was to begin to extend the Argo array into ice-covered waters and to sample the high-latitude water column below sea ice under winter conditions. An analogous array of 23 floats, also supplied by the University of Washington, were deployed in the Antarctic south of Australia during the same time frame from the vessel Aurora Australis.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20070901
Ending_Date: 20071031
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -94.85
East_Bounding_Coordinate: -64.05
North_Bounding_Coordinate: -61.85
South_Bounding_Coordinate: -70.683
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE TEMPERATURE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > SNOW DEPTH
Theme_Keyword: SV > SNOW VEHICLE
Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM SATELLITES
Theme_Keyword: R/V NBP > R/V NATHANIEL B. PALMER
Theme_Keyword: ARGOS > ARGOS DATA COLLECTION AND POSITION LOCATION SYSTEM
Theme_Keyword: GPS/IMU > GLOBAL POSITIONING SYSTEM/INERTIAL MEASUREMENT UNIT
Theme_Keyword: NSF/OPP > OFFICE OF POLAR PROGRAMS, NATIONAL SCIENCE FOUNDATION
Theme_Keyword: IPY > INTERNATIONAL POLAR YEAR
Theme_Keyword: ANTARCTIC SEA ICE > ANTARCTIC SEA ICE IN INTERNATIONAL POLAR YEAR
Theme_Keyword: SIMBA > SEA ICE MASS BALANCE IN THE ANTARCTIC
Theme_Keyword: SIMBA DRIFT STATION > SEA ICE MASS BALANCE IN THE ANTARCTIC-SIMBA DRIFT STATION
Theme_Keyword: Argo Floats
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENVIRONMENT
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Place_Keyword: OCEAN > SOUTHERN OCEAN > BELLINGSHAUSEN SEA
Access_Constraints: None
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: STEPHEN ACKLEY
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 118 W Castle Ln
City: San Antonio
State_or_Province: Texas
Postal_Code: 78213
Country: USA
Contact_Voice_Telephone: +1 1 210 341 6556
Contact_Electronic_Mail_Address: sackley@pol.net, Stephen.ackley@utsa.edu
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
Back to Top
Spatial_Reference_Information:
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NSIDC > National Snow and Ice Data Center
Contact_Person: STEPHEN NSIDC ACKLEY USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 118 W Castle Ln
City: San Antonio
State_or_Province: Texas
Postal_Code: 78213
Country: USA
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: University of Colorado
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0449
Country: USA
Contact_Voice_Telephone: +1 1 210 341 6556
Contact_Voice_Telephone: +1 (303) 492-6199
Contact_Facsimile_Telephone: +1 (303) 492-2468
Contact_Electronic_Mail_Address: sackley@pol.net, Stephen.ackley@utsa.edu
Contact_Electronic_Mail_Address: nsidc@nsidc.org
Resource_Description: SIMBA_Argo_Floats
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Not Available
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://utsa.edu/lrsg/
Access_Instructions:
Fees: Not Available
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20120216
Metadata_Review_Date: 20120420
Metadata_Future_Review_Date: 20120216
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JESSICA JIMENEZ
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 3407 Ivy Ave
City: Hidalgo
State_or_Province: Texas
Postal_Code: 78557
Country: USA
Contact_Voice_Telephone: 956-451-9288
Contact_Electronic_Mail_Address: Jessica.jimenez_eng@yahoo.com
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Back to Top
[ Update this Record ]


Link to Web Site