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Electric Field Mill Measurements

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Gary Burns
Publication_Date: 20100416
Title: Electric Field Mill Measurements
Edition:
Geospatial_Data_Presentation_Form: text
Series_Information:
Series_Name: Vostok electric field AAS#974
Issue_Identification:
Publication_Information:
Publication_Place: Kingston
Publisher: Australian Antarctic Division
Other_Citation_Details:
Online_Linkage: http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=841
Description:
Abstract:
These data were collected under a collaborative arrangement between the Australian Antarctic Division (Principal Investigator: Gary Burns) and the Russian Antarctic Expeditions (Chief Russian Investigator: Oleg Troshichev, Institute of Arctic and Antarctic Studies, St Petersburg). Vertical electric field data were collected with an electric field mill (EFM) at Vostok intermittently over the interval 1998-2004. [A different electric field mill was installed at Vostok in late December 2006, and metadata from this instrument is found at ASAC_974_2]. The data were initially collected with 10 second resolution. The EFM is calibrated monthly by placing a Faraday box containing parallel plates over the rotating dipole. A range of voltages are applied to the plates and the instrument is calibrated in volts per metre relative to the calibration box. Absolute values are not possible to determine, as the instrument compression is unknown. The values should be treated as relative. An additional factor to be noted is the height of the EFM. When it was initially installed, it was on a metal pole ~1.5 m above the snow surface. When the site was visited in December 2005, the height of the pole indicated the instrument would have been 1.05m above the snow surface. A change in height will alter the instrument compression (higher height implies larger instrument compression). It would be extremely difficult to accurately interpret these data to determine a long term trend. The 10 second resolution data have been averaged to yield minute resolution values. Calibrations are linearly interpolated and have been applied to the data. 1 minute averages are provided in this download for 1998-2004. 10 second averages are provided for 2005-2006. Files of the form "VEFCalibrationInfo_1998.txt" indicate the calibration data that has been applied to each year. Any data for any month is in files of the form: "VosEF_1998_01.txt", where "1998" indicates the year and "01" indicates the month. The monthly data files list the data as "Year,DoY,UT Hour,UT Min,EF-all(V/m),EF-fair(V/m)". This is the also the first line of each monthly file. "Year" is a 4 digit representation of the year. "DoY" is the day-of-year number from 1 to 365/366. "UT Hour" is the Universal Time hour for the observation. "UT Min" is the Universal Time minute for the observation. "EF-all(V/m)" is the electric field value determined for that minute, with the calibration applied, independent of whether the data are selected as 'fair-weather'. "EF-fair(V/m)" is the electric field value determined for that minute, with the calibration applied, IF that data has been selected as 'fair-weather'. An outline of how 'fair-weather' has been determined is given in the publication: Burns, G.B., Frank-Kamenetsky, A.V., Troshichev, O.A., Bering, E.A., Reddell, B.D. (2005) Interannual consistency of bi-monthly differences in diurnal variations of the ground-level, vertical electric field. Journal of Geophysical Research 110, D10106. doi:10.1029/2004JD005469. The data are comma delimited in the monthly processed data files. Thus the line 1998,60,0,25,179.14,179.14 means a fair-weather value of 179.14 volts per metre (relative to the calibration box) is determined for the 25th minute, of the zeroth UT hour, of the 60th day of the year 1998. 1998,60,3,7,244.75, means a value of 244.75 volts per metre (relative to the calibration box) is determined for the 7th minute, of the 3rd UT hour, of the 60th day of the year 1998; and that this value is not determined to be 'fair-weather'. The monthly processed data files list every minute for the month, even if there is no value for that minute. A lack of data is indicated by an absence of values, but a retention of the separating comma. Thus the line 1998,62,16,8,, indicates that no values were recorded for the 8th minute, of the 16th UT hour, of the 62nd day of the year 1998. 'Fair-weather' data were recorded at Vostok ~55% of the time the instrument was operational, but there are seasonal and summer diurnal variations. [See previous reference]. Please note: Vostok is a difficult operational environment and the electric field mill suffered considerable intervals of instrument failure. If there is no monthly file, then no data were recorded for that month. Vostok was not occupied during 2003, so no data exists for that time. The electric field mill used to collect these data incorporated carbon brush commutators to rectify the signal from the rotating dipole. Over the years of operation, wear on these led to greater variability in the monthly calibrations. As discussed in the paper previously referenced, the monthly calibration data for 2002 were twice as variable as any of the earlier years and thus only data from the years 1998 through 2001 were combined to yield seasonal-diurnal averages. The 2004 data (not available at the time of the referenced analysis) have a large monthly variability, but not as great as 2002. When utilising the data, these difficulties need to be considered. The yearly calibration data files can be used to quantify the level of uncertainty in the measurements.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Burns, G.B., Frank-Kamenetsky, A.V., Troshichev, O.A., Bering, E.A., Papitashvili, V.O. 1998 The geoelectric field: a link between the troposphere and solar variability. Annals of Glaciology 27 651-654
Supplemental_Information:
REFERENCE: Frank-Kamenetsky, A.V., Burns, G.B., Troshichev, O.A., Papitashvili, V.O., Bering, E.A., French, W.J.R. 1999 The geoelectric field at Vostok, Antarctica: its relation to the interplanetary magnetic field and the cross polar cap potential difference. Journal of Atmospheric and Solar-Terrestrial Physics 61 1347-1356
Supplemental_Information:
REFERENCE: Frank-Kamenetsky, A.V., Troshichev, O.A., Burns, G.B., Papitashvili, V.O. 2001 Variations of the atmospheric electric field in the near-pole region related to the interplanetary magnetic field Journal of Geophysical Research 106 A1 179-190
Supplemental_Information:
REFERENCE: Corney, R.C., Burns, G.B., Michael, K., Frank-Kamenetsky, A.V., Troshichev, O.A., Bering, E.A., Papitashvili, V.O., Breed, A.M., Duldig, M.L. 2003 The influence of polar-cap convection on the geoelectric field at Vostok, Antarctica Journal of Atmospheric and Solar-Terrestrial Physics 65 345-354
Supplemental_Information:
REFERENCE: Burns, G.B., Frank-Kamenetsky, A.V., Troshichev, O.A., Bering, E.A., Reddell, B.D. 2005 Interannual consistency of bi-monthly differences in diurnal variations of the ground-level, vertical electric field. Journal of Geophysical Research 110 D10106 doi:10.1029/2004JD005469
Supplemental_Information:
REFERENCE: Burns, G.B., Tinsley, B.A., Klekociuk, A.R., Troshichev, O.A., Frank-Kamenetsky, A.V., Duldig, M.L., Bering, E.A., Clem, J.M. 2006 Antarctic polar plateau vertical electric field variations across heliocentric current sheet crossings. Journal of Atmospheric and Solar-Terrestrial Physics 68 639-654
Supplemental_Information:
REFERENCE: Frank-Kamenetsky, A.V., Troshichev, O.A., Morozov, V.N., Burns, G, Corney, R. 2006 Relation between the near-Earth electric-field at high latitudes and intense cloud-to-ground lightning strokes initiating VLF emission bursts. Geomagnetism and Aeronomy 46 3 382-388
Supplemental_Information:
REFERENCE: Burns, G.B., Tinsley, B.A., Frank-Kamenetsky, A.V., Bering, E.A. 2007 Interplanetary magnetic field and atmospheric electric circuit influences on ground-level pressure at Vostok. Journal of Geophysical Research 112 D04103 doi:10.1029/2006JD007246
Supplemental_Information:
REFERENCE: Tinsley, B.A., Burns, G.B., Zhou, L. 2007 The role of the global electric circuit in solar and internal forcing of clouds and climate Advances in Space Research 40 1126-1139
Supplemental_Information:
REFERENCE: Burns, G.B., Tinsley, B.A., French, W.J.R., Troshichev, O.A., Frank-Kamenetsky, A.V. 2008 Atmospheric circuit influences on ground-level pressure in the Antarctic and Arctic Journal of Geophysical Research 113 D15112 doi:10.1029/2007JD009618
Supplemental_Information:
REFERENCE: Kniveton, D.R., Tinsley, B.A., Burns, G.B., Bering, E.A., Troshichev, O.A. 2008 Variations in global cloud cover and the fair-weather vertical electric field Journal of Atmospheric and Solar-Terrestrial Physics 70 1633-1642
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19980111
Ending_Date: 20021016
Currentness_Reference:Unknown
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040124
Ending_Date: 20041130
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 107.05
East_Bounding_Coordinate: 107.15
North_Bounding_Coordinate: -78.45
South_Bounding_Coordinate: -78.55
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 > ATMOSPHERE > ATMOSPHERIC ELECTRICITY > ELECTRIC FIELD
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC ELECTRICITY > LIGHTNING
Theme_Keyword: EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > ELECTRIC FIELDS/ELECTRIC CURRENTS
Theme_Keyword: GROUND STATIONS
Theme_Keyword: GROUND-BASED OBSERVATIONS
Theme_Keyword: RDEFM > ROTATING DIPOLE ELECTRIC FIELD MILL
Theme_Keyword: IPY > INTERNATIONAL POLAR YEAR
Theme_Keyword: SLAP > SOLAR VARIABILITY LINKAGES TO ATMOSPHERIC PROCESSES
Theme_Keyword: Electric Field
Theme_Keyword: Geoelectrical Circuit
Theme_Keyword: Universal Time
Theme_Keyword: Vertical Electric Field
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > VOSTOK
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Temporal:
Temporal_Keyword_Thesaurus: GCMD
Temporal_Keyword: 1 Minute
Access_Constraints: These data are available for download from the URL given below. The download contains a number of monthly data files, as well as yearly calibration files. All files are stored in comma delimited, ASCII text format. Up to and including 2004, files are presented as 1 minute averages.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_974_1 when using these data. Please also contact the investigator before using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GARY BURNS
Contact_Person_Primary:
Contact_Person: ALEXANDR VICTOROVICH FRANK-KAMANETSKY
Contact_Person_Primary:
Contact_Person: OLEG TROSHICHEV
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Address:
Address_Type: Mailing and Physical Address
Address: ARCTIC AND ANTARCTIC Research Institute
Address: Bering St 38
City: St Petersberg
Postal_Code: 199397
Country: Russia
Contact_Address:
Address_Type: Mailing and Physical Address
Address: ARCTIC AND ANTARCTIC Research Institute
Address: Bering St 38
City: St Petersberg
Postal_Code: 199397
Country: Russia
Contact_Voice_Telephone: +61 3 6232 3381
Contact_Voice_Telephone: +7 812 352 1149
Contact_Voice_Telephone: +7 812 352 1149
Contact_Facsimile_Telephone: +61 3 6232 3496
Contact_Facsimile_Telephone: +7 812 352 2688
Contact_Facsimile_Telephone: +7 812 352 2688
Contact_Electronic_Mail_Address: gary.burns@aad.gov.au
Contact_Electronic_Mail_Address: al_frank@aari.nw.ru
Contact_Electronic_Mail_Address: olegtro@aari.nw.ru
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Vostok electric field (EF) data analysis has been processed by linearly interpreting between calibration measurements. See the calibration files for further information. Specific caveats on the Vostok EF data: They are calibrated only to the calibration box, NOT absolutely. They should not be used for long-term trend analysis ...when the Electric Field Mill (EFM) was installed on a metal post in 1998 it was 1.5m above the snow surface. In January 2006 the EFM on the pole was ~1.05 m above the snow surface. The compression factor over the years would be changed by a variable amount. History of Vostok EF data: There are no data from 2003; Vostok was not occupied that winter. A new EFM was only installed at the end of 2005, after the old EFM became very unreliable towards the end of 2004. Unprocessed data (10s resolution - no selection for 'fair-weather') are available at ASAC_974_2
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: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: ASAC_974_1
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: text
Transfer_Size: 16 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the data - text files
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 974
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://globalcircuit.phys.uh.edu/SLAP/SLAP_web_con...
Access_Instructions:
Solar Linkages to Atmospheric Processes website
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/metadata/asp/ADAS.html
Access_Instructions:
Information on the ADAS file format.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset
Fees: Free
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Metadata_Reference_Information:
Metadata_Date: 20000808
Metadata_Review_Date: 20140829
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GARY BURNS
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3381
Contact_Facsimile_Telephone: +61 3 6232 3496
Contact_Electronic_Mail_Address: gary.burns@aad.gov.au
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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