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Measurements of the UV radiation (Blue, Violet, UVA and UVB) falling on sea ice in McMurdo Sound, quantification of sea ice algae and the effect of snow thickness on the transmissivity of sea ice to UV radiation

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Measurements of the UV radiation (Blue, Violet, UVA and UVB) falling on sea ice in McMurdo Sound, quantification of sea ice algae and the effect of snow thickness on the transmissivity of sea ice to UV radiation
Description:
Abstract:
The relative amounts of visible, near and far UV radiation (Blue, Violet, UVA and UVB) falling onto sea ice in McMurdo Sound was measured at a site well cantered in the ice, i.e. not at the ice edge. Two instruments were used to measure the UV levels. One is a three channel motor, which measures the total downward radiation in the Blue, Violet and Ultraviolet regions. A shade can be used to separate the direct sun radiation from the background sky radiation and a filter provides a separation of the UV channel into UVA and UVB radiation. The second instrument consists of a monochromator attached to a small telescope and measures the spectral distribution of radiation from a 5 degree region of the sky. The incident light is separated into polarisation components and the instrument thus also measures the polarisation of the skylight. The weather during the recording period was overcast with snow and blizzards but the monitors were run throughout this period and accumulated data on UVA, UVB and UV radiation levels under overcast conditions. The amount of algae growing in the area around the ice was simultaneously quantified. A two wavelength detector measured the amount of light at different locations on a circle of about 1m radius. The detectors were sensitive to red and green wavelengths. Algae absorb radiation strongly in the green, so the relative intensity in these two bands should indicate the amount of algae present. The effect of various thicknesses of snowfall on the UV transmission through to the sea ice algae below the ice was measured using samples cut from snow drifts.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Beaglehole, D. Ramanathan, B. Rumberg, J. 1998 The UV and IR transmittance of Antarctic snow. Journal of geophysical research 103(8): 8849-8857
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19951101
Ending_Date: 19951113
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 166.3833
East_Bounding_Coordinate: 166.3833
North_Bounding_Coordinate: -77.6833
South_Bounding_Coordinate: -77.6833
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > TRANSMITTANCE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION
Theme_Keyword: GROUND STATIONS
Theme_Keyword: MONOCHROMATORS
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: CONTINENT > ANTARCTICA > MCMURDO SOUND
Place_Keyword: CONTINENT > ANTARCTICA > TENT ISLAND
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: DAVID BEAGLEHOLE
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Beaglehole Instruments Ltd
Address: 32 Salamanca Road
Address: Kelburn
City: Wellington
Postal_Code: 6012
Country: New Zealand
Contact_Voice_Telephone: +64 4 473 7749
Contact_Facsimile_Telephone: +64 4 473 2686
Contact_Electronic_Mail_Address: david.beaglehole@beaglehole.com
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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: NZ/NZAI/ANZ > Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand
Contact_Person: SHULAMIT GORDON
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
Resource_Description: K041_1995_1996_NZ_1
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.antarcticanz.govt.nz/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20090521
Metadata_Review_Date: 20090606
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: CEISHA POIROT
Contact_Person_Primary:
Contact_Person: SHULAMIT GORDON
Contact_Position: DIF AUTHOR
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: c.poirot@antarcticanz.govt.nz
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
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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