Aeolian Process Geomorphology Data, McMurdo Dry Valleys, Antarctica

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: John Gillies
Publication_Date: Unknown
Title: Aeolian Process Geomorphology Data, McMurdo Dry Valleys, Antarctica
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Description:
Abstract:
This research project provides new information to fill in data gaps regarding the magnitude, frequency, and seasonality of aeolian sediment transport events in three of the McMurdo Dry Valleys: the Taylor, the Victoria, and the Wright. The characterization of the aeolian transport system in these valleys is based on two years of continuous ten minute average observations of wind speed and direction, temperature and saltation activity at four locations within these three valleys. In addition to this high-resolution temporal data, for each of the two years of observation, up to two time/event integrated horizontal saltation flux measurements were made with custom-designed traps that remained open for periods of time regulated by the saltation flux at each of the four measurement locations. These trap-derived fluxes combined with the saltation and wind data has allowed for the characterization of time the saltation system was active, the average flux rates per unit of saltation time, as well as an estimation of the total annual horizontal flux based on the record of the total time saltation was observed to be active. The temporal record of saltation activity is also linked to wind direction and temperature providing information on the daily and seasonal patterns of aeolian transport. The acquired data can be used to further probe the characteristics of the aeolian sediment transport system in the McMurdo Dry Valleys.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Gillies, J.A., W.G. Nickling, M. Tilson, and E. Furtak-Cole (2012). Wind-formed Gravel Bed Forms, Wright Valley, Antarctica. Journal of Geophysical Research – Earth Surface (submitted). Gillies, J.A., W.G. Nickling, and M. Tilson (2012). Frequency, magnitude and seasonality of aeolian sediment transport in the Taylor, Wright, and Victoria Valleys, Antarctica. Journal of Geophysical Research – Earth Surface (submitted).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20081231
Ending_Date: 20100131
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 163.25168
East_Bounding_Coordinate: 161.85075
North_Bounding_Coordinate: -77.37241
South_Bounding_Coordinate: -77.60795
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > GEOMORPHOLOGY > EOLIAN LANDFORMS/PROCESSES
Theme_Keyword: NSF/OPP > OFFICE OF POLAR PROGRAMS, NATIONAL SCIENCE FOUNDATION
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Temporal:
Temporal_Keyword_Thesaurus: GCMD
Temporal_Keyword: Minutes
Temporal_Keyword: 1 Minute - < 1 Hour
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JOHN A GILLIES
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Desert Research Institute 2215 Raggio Parkway
City: Reno
State_or_Province: Nevada
Postal_Code: 89512
Country: USA
Contact_Voice_Telephone: 775-674-7035
Contact_Facsimile_Telephone: 775-674-7013
Contact_Electronic_Mail_Address: jackg@dri.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Overall the recovery for the meteorological, saltation activity data, and sediment collection using the traps was very high with five notable exceptions. In late December 2008 the eastern Victoria Valley site datalogger was submerged under water when the meltwater stream of the Victoria glacier changed its course and flooded the site. The wind speed profile measurements from the first season are suspect and were not subsequently used to calculate aerodynamic roughness length and wind shear velocity data. The wind speed and direction measurements at 4.2 m appear to be reasonable. The temperature and saltation activity data also appear to be reasonable and were used in further analysis. The second data recovery problem occurred for wind direction measurements in the Taylor Valley in 2008-2009. At some indeterminate time (or multiple times) the tower rotated due to an anchor line connected to the lowest anemometer boom arm slipping its mooring, thus the wind direction data for that period cannot be used. The third problem was Trap 1 at the Victoria II site fell over at some time and it was not possible to calculate an associated time-integrated horizontal flux. The fourth problem that occurred was that there was very little sediment collected in the trap at the western Victoria Valley site during 2009, although there was ample evidence that transport had occurred. We suspect that it was prevented from rotating for some unknown reason (possibly snow accumulation) for some unknown period of time. The trap was freely moving when we arrived at the site in December 2009, and the saltation activity data indicate activity at levels approaching those observed in the eastern part of the Valley, where large masses of sand were collected. The final problem lies with the Safire saltation sensors for estimating a mass flux of sand. The sensors did register the impacts of saltating grains that provided a means to establish when the saltation system was active. There were also periods when the sensors reached their maximum voltage output in response to the saltation, exceeding their capacity to measure the vigorous saltation that was occurring in response to high wind events. Unfortunately, these data do not allow for the conversion of the mV signal to a flux value using the wind tunnel calibrations with any great confidence.
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: DRI > Desert Research Institute
Contact_Person: JOHN A GILLIES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Desert Research Institute 2215 Raggio Parkway
City: Reno
State_or_Province: Nevada
Postal_Code: 89512
Country: USA
Contact_Voice_Telephone: 775-674-7035
Contact_Facsimile_Telephone: 775-674-7013
Contact_Electronic_Mail_Address: jackg@dri.edu
Resource_Description: NSF_OPP_0636218
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Excel Spreadsheet
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.dri.edu
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsf.gov/awardsearch/showAward.do?AwardNumbe...
Access_Instructions:
NSF Project (Award ID# 0636218)
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20120605
Metadata_Review_Date: 20120606
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
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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