Sea Ice Mass Balance in the Antarctic - Physical Oceanography

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: Sea Ice Mass Balance in the Antarctic - Physical Oceanography

Description:

Abstract:

Between September 25 and October 25 there were a total of 69 CTD casts with the NBP’s 24 bottle rosette system deployed from ship’s Baltic room (‘Baltic CTD’) and 14 casts with a sensor-only CTD package deployed from the stern A-frame (‘Stern CTD’) when conditions or work on the ice did not allow starboard-side access to the water. The Baltic room system includes a 24-place rosette frame with bullister-type rosette bottles of slightly less than 10 liter capacity each. Data acquisition for these two CTD systems as well as the Trace Metal Clean (TMC) CTD took place on an NBP Windows XP computer running Sea-Bird’s Seasave software. Electronics problems and computer software freeze-ups required repeated re-terminations of the CTD cables and at least one change of CTD computer during the course of NBP07-09. All three CTD packages included dual temperature, salinity, and oxygen sensors, while the Baltic and TMC packages additionally carried transmissometers, fluorometers, and PAR sensors (the latter being depth-rated to 1000m, it was removed from the Baltic CTD frame for deep casts). Additionally, dissolved oxygen (winkler method) and salinity values determined via laboratory analysis of water collected from rosette bottles following the Baltic and TMC casts were used to correct for any drift that may be detected in the cast data. Other laboratory analyses of water samples collected from rosette bottles included DMS, pH, total pH, DIC, total alkalinity, nutrients, and chlorophyll. Depending on water column characteristics such as temperature, salinity, and (later in the cruise / season), fluorescence, niskin bottles were triggered at various (between two and 23) depths during the CTD up-cast. Additional water sampling was conducted from the NBP’s uncontaminated seawater line, both for salinity analyses and for total CO2, which will be analyzed at the Lamont-Doherty Earth Observatory in conjunction with the ongoing Takahashi pCO2 surface observation project. Our first three Baltic CTD casts to 500-550m were acquired over a north-south transect from southeast of Peter 1 Island (7016S), to the most southerly CTD location of the cruise (70 38 S). All three CTD casts showed characteristic winter profiles with a cold (-1.8C), fresh (33.96-34.02ppt) surface mixed layer down to 90m, 120m and 150m (from north to south), overlying warm (1.4-1.9C), salty (34.68-34.72ppt) Upper Circumpolar Deep Waters. Basic physical and chemical oceanography from CTD, trace metal and other bottle casts is generally poor in the Southern Ocean and particularly so in the ice-covered winter pack ice zone. This data set provides better information on the ocean beneath the ice pack in the Bellingshausen Sea than previously available.

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: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN

Theme_Keyword: EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY

Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE DEPTH/THICKNESS

Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > SALINITY

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL

Theme_Keyword: SV > SNOW VEHICLE

Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM SATELLITES

Theme_Keyword: R/V NBP > R/V NATHANIEL B. PALMER

Theme_Keyword: CTD > CONDUCTIVITY, TEMPERATURE, DEPTH

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: 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

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

Spatial_Reference_Information:

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_Physical_Oceanography

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

Metadata_Reference_Information:

Metadata_Date: 20120301

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