ARM North Slope Alaska, Radiation Measurements

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Wanda Ferrell, Ted Cress, Thomas Ackerman
Publication_Date: Unknown
Title: ARM North Slope Alaska, Radiation Measurements
Edition:
Geospatial_Data_Presentation_Form: netCDF files
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place:
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Online_Linkage: http://www.arm.gov
Description:
Abstract:
The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy (DOE). ARM scientists focus on obtaining field measurements and developing models to better understand the processes that control solar and thermal infrared radiative transfer in the atmosphere (especially in clouds) and at the earth's surface. The URL for the ARM Data Archive is "http://www.archive.arm.gov/". The URL for general information about the ARM program is "http://www.arm.gov/". The data stored by the ARM Archive includes numerous parameters about radiative flux, meteorology, water vapor and clouds. The North Slope of Alaska/Adjacent Arctic Ocean (NSA/AAO) site is providing data about cloud and radiative processes at high latitudes. These data are being used to refine models and parameterizations as they relate to the Arctic. The NSA/AAO site is centered at Barrow and extends to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (to Oliktok). Radiation data at Barrow (C1) and Atqasuk (C2) are collected using many specialized instruments. Detailed information on each instrument is available at "http://www.arm.gov/docs/instruments.html". The following list contains the instrumentation used and the data available for the Barrow and Atqasuk sites. Atmospheric Emitted Radiance Interferometer (AERI). For complete information on the AERI, visit "http://www.arm.gov/instruments". The AERI measures the absolute infrared spectral radiance (watts per square meter per steradian per wavenumber) of the sky directly above the instrument. The spectral measurement range of the instrument is 500 to 3300 wavenumbers(cm-1) or 20 to 3 microns. Spectral resolution is 1.0 cm-1. Instrument field-of-view is 1.3 degrees. A calibrated sky radiance spectrum is produced every 10 minutes. The AERI data can be used for (1) evaluating line-by-line radiative transport codes, (2) detecting/ quantifying cloud effects on ground-based measurements of infrared spectral radiance, and (3) calculating vertical atmospheric profiles of temperature and water vapor. Primary measurements are (1) absolute infrared spectral radiance of the sky in units of watts per square meter per steradian per wavenumber; and (2) sky brightness temperature as a function of wavenumber in units of degrees Kelvin. Calculated quantities are (1) variance of sky infrared spectral radiance as a function of wavenumber and (2) vertical atmospheric profiles of temperature, potential temperature, mixing ratio, and relative humidity. At Barrow (C1), AERI data are available for 1998-09-22 to present. ARM data streams are coded as follows: nsaaerich1C1: channel 1 data nsaaerich2C1: channel 2 data nsaaeriengineerC1: engineering data nsaaerisummaryC1: summary data. Additional data streams or value added products may be added in the future. Multi-Filter Rotating Shadowband Radiometer (MFRSR or MFR). For complete information on the MFRSR, see "http://www.arm.gov/instruments". The MFRSR takes spectral measurements of direct normal, diffuse horizontal, and total horizontal solar irradiances. These measurements are at nominal wavelengths of 415, 500, 615, 673, 870, and 940 nm. The measurements are made at a user specified time interval; typically this interval is about one minute or less, at the SGP site, the sampling interval is 20 seconds. From such measurements, one may infer the atmosphere's optical depth at the wavelengths mentioned above. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor, as well as aerosol and other atmospheric constituents. A silicon detector is also part of the MFRSR. This broadband detector provides a measure of the broadband direct normal, diffuse horizontal, and total horizontal solar irradiances. These quantities are uncalibrated and reported in units of counts. An MFRSR head that is mounted to look vertically downward can measure upwelling spectral irradiances (at the same wavelengths as the MFRSR). In the ARM system, this instrument is called an MFR. At the SGP there are two MFRs; one mounted at the 10 m height and the other at 25 m. At the NSA sites, the MFRs are mounted at 10 m. The primary quantities measured by the system are: (1) the direct normal solar spectral irradiance, (2) the total horizontal solar spectral irradiance, and (3) the diffuse horizontal solar spectral irradiance. The measurements at each wavelength are made by a single filtered detector with a nominal 10-nm FWHM bandwidth. At Barrow (C1), MFR data are available for 1998-03-18 to present. At Atqasuk (C2), MFR data are available for 2000-04-25 to present. ARM data streams are coded as follows: nsagndmfr: ground-oriented MFR: upwelling radiances nsamfr10m: ground-oriented MFR: upwelling radiances at 10-m height nsamfrsr: MFRSR: downwelling irradiances Additional data streams or value added products may be added in the future. The Ground Radiation (GNDRAD) The GNRAD collection of radiometers provides continuous measurements of broadband shortwave (solar) and longwave (infrared) irradiances for upwelling components. For complete information on GNDRAD, see "http://www.arm.gov/instruments". At Barrow (C1), GNRAD data are available for 1998-04-06 to present. At Atqasuk (C2), GNRAD data are available for 2000-05-25 to present. ARM data streams are coded as follows: nsagndrad20s: 20-second upwelling radiation nsagndrad60s: 60-second upwelling radiation. Additional data streams or value added products may be added in the future. Normal Incidence Multi-Filter Radiometer (NIMFR). For complete information on the NIMFR, see "http://www.arm.gov/instruments". The NIMFR is a ground-based instrument that provides a time series of the shortwave spectral direct normal irradiance. Additionally, there is a broadband silicon detector that can crudely measure the direct normal broadband irradiance. These irradiance measurements can be used to infer clear sky aerosol optical depth and columnar abundances of ozone and water vapor. The NIMFR is one of a class of instruments known as sun photometers. The primary quantities measured by the NIMFR are direct normal spectral irradiances at six discrete wavelengths as well as a broadband measurement from the silicon detector. At Barrow (C1), NIMFR data are available for 1998-03-23 to present. At Atqasuk (C2), NIMFR data are available for 2000-04-16 to present. ARM data streams are coded as follows: nsanimfr: direct normal irradiances. Additional data streams or value added products may be added in the future. The Sky Radiation (SKYRAD) The SKYRAD collection of radiometers provides continuous measurements of broadband shortwave (solar), longwave (infrared), and ultra violet irradiances for downwelling components. For complete information on SKYRAD, see "http://www.arm.gov/instruments". At Barrow (C1), SKYRAD data are available for 1998-02-14 to present. At Atqasuk (C2), SKYRAD data are available for 1999-08-21 to present. ARM data streams are coded as follows: nsaskyrad20s: 20-second downwelling radiation data nsaskyrad60: 60-second downwelling radation data Additional data streams or value added products may be added in the future.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Ackerman, T. P. and G. M. Stokes. 2003. The Atmospheric Radiation Measurement Program. Physics Today 56: 38-44. Science Plan for the Atmospheric Radiation Measurement Program (ARM). 1996. U.S. Department of Energy, DOE/ER-0670T. Atmospheric Radiation Measurement Program Plan. 1990. DOE/ER-0441. U.S. Department of Energy, Office of Energy Research, Washington, D.C. NTIS DE90008108.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19980214
Ending_Date: Unknown
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -157.41
East_Bounding_Coordinate: -156.62
North_Bounding_Coordinate: 71.32
South_Bounding_Coordinate: 70.47
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
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 > AEROSOLS > AEROSOL OPTICAL DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > ATMOSPHERIC EMITTED RADIATION
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > LONGWAVE RADIATION
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR IRRADIANCE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION
Theme_Keyword: MARK IV INTERFEROMETER
Theme_Keyword: MFRSR > MULTIFILTER ROTATING SHADOWBAND RADIOMETER AND BROADBAND PYRANOMETER
Theme_Keyword: PYRANOMETERS
Theme_Keyword: PYRGEOMETERS
Theme_Keyword: PYRHELIOMETERS
Theme_Keyword: RADIOMETERS
Theme_Keyword: ARM > ATMOSPHERIC RADIATION MEASUREMENT PROJECT
Theme_Keyword: Department Of Energy
Theme_Keyword: Doe
Theme_Keyword: Climate Change
Theme_Keyword: Global Change
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Place_Keyword: GEOGRAPHIC REGION > ARCTIC
Place_Keyword: GEOGRAPHIC REGION > POLAR
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA > ATQASUK, ARM TWP SITE C2
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA > BARROW, ARM TWP SITE C1
Access_Constraints: Data of common interest from external sources are shared whenever possible, but some sources restrict secondary distribution of data. In these cases, ARM will seek specific allowances to distribute such data to members of the ARM Science Team, but will observe restrictions on further distribution from the Archive if required.
Use_Constraints:
Use-constraints, if any, are provided in Data Quality Reports sent with the data files when data are requested. The automatic inclusion of a data originator as a co-author is not insisted upon in the ARM program, but the source of any data should be clearly recognized either as a co-author or through an appropriate acknowledgment. The ARM Program should be acknowledged in publications as the programmatic origin of the field program. ARM-funded investigators will use the following acknowledgment: This research was supported by the Office of Biological and Environmental Research of the U.S. Department of Energy (under grant or contract number - if appropriate) as part of the Atmospheric Radiation Measurement Program. The U.S. Department of Energy Atmospheric Radiation Measurement Program should be appropriately acknowledged in publications resulting from collaborative efforts in which ARM data or facilities were used. ARM-funded principal investigators will give proper acknowledgment to cooperating or collaborating programs in those cases where data originating therein are being used.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: BERNIE ZAK
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Sandia National Laboratory
Address: Dept. 6233, MS 0755
Address: P.O. Box 5800
City: Albuquerque
State_or_Province: NM
Postal_Code: 87185
Country: USA
Contact_Voice_Telephone: (505) 845-8631
Contact_Facsimile_Telephone: (505) 844-0016
Contact_Electronic_Mail_Address: bdzak@sandia.gov;Bernie.Zak@arm.gov
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
One of the goals of the ARM Program is to provide data streams of reasonable quality for scientific research. Traditionally, data quality issues have been addressed within ARM at several levels, including by instrument mentors, site scientists, value added product scientists, and Science Team members at large. Maintaining data quality for a program of the size and complexity of ARM is a significant challenge. Efforts toward this end have matured and evolved over the life of the program. The ARM Program Data Quality (DQ) Office has the responsibility for ensuring that quality assurance results are communicated to (1) data users so that they may make informed decisions when using the data, and (2) ARM's Site Operations and Engineers to facilitate improved instrument performance and thereby minimize the amount of unacceptable data collected. For additional information, visit "http://www.arm.gov/data/data_quality.stm".
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: DOE/ARM/ARCHIVE > ARM Archive, Atmospheric Radiation Measurement Program, U. S. Department of Energy
Contact_Person: ARM USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Oak Ridge National Laboratory
Address: Building 1507, MS 6407
Address: P.O. Box 2008
City: Oak Ridge
State_or_Province: TN
Postal_Code: 37831-6407
Country: USA
Contact_Voice_Telephone: 888-ARM-DATA (888-276-3282) or 865-241-4851
Contact_Facsimile_Telephone: 865-574-4665
Contact_Electronic_Mail_Address: armarchive@ornl.gov
Resource_Description: NSAradiation
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: netCDF
Transfer_Size: Variable
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.archive.arm.gov
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://gcmd.nasa.gov/getserf.htm?NCVweb
Access_Instructions:
NCVweb is an interactive web-based tool for viewing atmospheric radiation measurement (ARM) data.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.archive.arm.gov/docs/catalog/
Access_Instructions:
This catalog lists the data streams that are currently available from the ARM Archive. The data streams are listed by file format type (i.e, CDF, HDF, RAW, JPG, ASC, and Other) and then by the site where the data are collected. Each list contains the name of the data streams in alphanumeric order, the number of files within the data stream, the minimum data date, and the maximum data date. The sites that have the word development in parenthesis are data processes which are operated during the final phases of implementation of a data source, resulting in data which are labeled as Development. Development data are frequently available to users, but additional information about the operating conditions and potential for errors must be considered. The files in CDF format are also listed in preformatted lists for those browsers that have difficulty handling large html tables. The information in this catalog is updated about once a month.
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20031008
Metadata_Review_Date: 20090121
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: RAYMOND MCCORD
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Building 1507, MS 6407
Address: P.O. Box 2008
Address: Oak Ridge National Laboratory
City: Oak Ridge
State_or_Province: TN
Postal_Code: 37831-6407
Country: USA
Contact_Voice_Telephone: 865-574-7827
Contact_Facsimile_Telephone: 865-574-4665
Contact_Electronic_Mail_Address: mccordra@ornl.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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