Berkner Island Ice Cores 1994-95

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Berkner Island Ice Cores 1994-95
Description:
Abstract:
Overview: 12 ice cores were drilled on and around the two main 'dome' locations on Berkner Island during the 1994/95 field season. These were drilled in a joint project between British Antarctic Survey (BAS) and the Alfred Wegner Institue (AWI). BAS were responsible for the drilling of the cores at the northern location while AWI drilled the cores at the southern location. The objective of the Berkner Ice Core Project was to reconstruct a high resolution record of climate and environmental change on timescales extending from centuries to several thousand years. Berkner Island lies adjacent to the Weddell Sea: ice core records from this island will help elucidate the role of the Weddell Sea in long-term climate change over West Antarctica. North Dome: The first phase of drilling took place on Reinwarthhvhe, the northern dome of Berkner Island. A main core (R1) was drilled from a shallow pit, covered by a temporary tarpaulin to protect the drilling operation from excessive sunlight. This main core was 151.4m in length and 106mm in diameter. In addition four 10m cores were collected at four sites 5km from the main borehole in the North, South, East and West directions. Two other cores were collected of varying length as well as snow pits to provide additional information. Traverse: A party of two BAS staff travelled overland to the South Dome location. On route they drilled two 20m cores and a third at a later date. These are used to assess the spatial variability of the ice core records across Berkner Island and to provide a link between the two domes. South Dome: The second major phase of drilling took place at a site 5km to the south of Thyseenhvhe, the southern dome of Berkner Island. The location of the drill site was chosen to avoid the geographical dome where a future deeper drilling is planned. Two cores were drilled, the first (R10), 182m in length and 99mm in diameter and a second, 101m in length was drilled alongside the first and used for analytical techniques that require full sections of the core. General findings: Measurements of accumulation rates, reference horizons (such as the eruptions of Krakatoa and Tambora) and the annual horizons have given an approximate age for the bottom of both main cores. The north dome core: 580 years and the south dome core: 1200 years. 10m temperatures were logged in the main deep cores, and the shallower cores. These indicate a fall of 20C between the northern dome and the southern dome with intermediate locations lying on the same trend. Temperatures are close to those measured on the Ronne Ice Shelf approximately 700m lower. The higher than expected temperatures probably indicate a persistent temperature inversion over Berkner Island. Full borehole temperatures were logged in both the main north dome hole and the south dome hole. The temperature profiles show a turning point to warmer temperatures at 70m. This is consistent with an overall warming of the mean temperature at the site of about 0.50C in recent decades.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19941220
Ending_Date: 19950213
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -48.0
East_Bounding_Coordinate: -46.0
North_Bounding_Coordinate: -78.0
South_Bounding_Coordinate: -79.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > BOREHOLES
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > BOREHOLES
Theme_Keyword: CORING DEVICES
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > WEST ANTARCTICA > RONNE ICE SHELF > BERKNER ISLAND
Place_Keyword: CONTINENT > ANTARCTICA > WEST ANTARCTICA > RONNE ICE SHELF > BERKNER ISLAND > MCCARTHY INLET
Place_Keyword: CONTINENT > ANTARCTICA > WEST ANTARCTICA > RONNE ICE SHELF > BERKNER ISLAND > REINWARTHHOHE
Place_Keyword: CONTINENT > ANTARCTICA > WEST ANTARCTICA > RONNE ICE SHELF > BERKNER ISLAND > THYSSENHOHE
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ROBERT MULVANEY
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: British Antarctic Survey
Address: CAMBRIDGE
Address: CB3 OET
City: High Cross
State_or_Province: Madingley Road
Country: UNITED KINGDOM
Contact_Electronic_Mail_Address: rmu@bas.ac.uk
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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
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UK/NERC/BAS/AEDC > Antarctic Environmental Data Centre, British Antarctic Survey, Natural Environment Research Council, United Kingdom
Contact_Person: AEDC BAS DATA MANAGER
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctic Environmental Data Centre
Address: British Antarctic Survey
Address: High Cross, Madingley Road
City: Cambridge
State_or_Province: Cambridgeshire
Postal_Code: CB3 0ET
Country: UNITED KINGDOM
Contact_Voice_Telephone: +44 (0)1223 221594
Contact_Voice_Telephone: +44 (0) 1223 221312
Contact_Facsimile_Telephone: +44 (0)1223 362616
Contact_Electronic_Mail_Address: aedc@bas.ac.uk
Resource_Description: 89738616867620 > Berkner Island Ice Cores 1994-95
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://www.antarctica.ac.uk/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.antarctica.ac.uk/mdms/DIFDir/8973861686...
Access_Instructions:
Use related URL to access primary copy of metadata record from the BAS Metadata Management System. Gives detailed, up to date metadata description, which this DIF has been derived from.
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20000627
Metadata_Review_Date: 20061013
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: AEDC BAS DATA MANAGER
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctic Environmental Data Centre
Address: British Antarctic Survey
Address: High Cross, Madingley Road
City: Cambridge
State_or_Province: Cambridgeshire
Postal_Code: CB3 0ET
Country: UNITED KINGDOM
Contact_Voice_Telephone: +44 (0)1223 221594
Contact_Voice_Telephone: +44 (0) 1223 221312
Contact_Facsimile_Telephone: +44 (0)1223 362616
Contact_Electronic_Mail_Address: aedc@bas.ac.uk
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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