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	   gmd:Hierarchy_Level_Name:  NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration
	   gmd:Contact:  
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	         gmd:individualName:  NSIDC User Services
	         gmd:organisationName:  National Snow and Ice Data Center
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	                  gmd:city:  Boulder
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	   gmd:Date_Stamp:  
	      Date:  2014-04-16
	   gmd:Metadata_Standard_Name:  ISO 19115 Geographic Information - Metadata First Edition
	   gmd:Metadata_Standard_Version:  ISO 19115:2003
	   gmd:DataSet_URI:  http://nsidc.org/data/g02202.html
	   gmd:Identification_Information:  
	      gmd:MD_DataIdentification:  
	         gmd:citation:  
	            gmd:CI_Citation:  
	               gmd:title:  NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration
	               gmd:date:  
	                  gmd:CI_Date:  
	                     gmd:date:  2013
	                     gmd:dateType:  
	                        gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication"
	               gmd:edition:  2
	               gmd:editionDate:  
	                  gmd:Date:  2013-06-20
	               gmd:identifier:  G02202
	               gmd:identifier:  http://dx.doi.org/10.7265/N55M63M1
	               gmd:citedResponsibleParty:  
	                  gmd:CI_ResponsibleParty:  
	                     gmd:individualName:  NSIDC User Services
	                     gmd:organisationName:  National Snow and Ice Data Center
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	                           gmd:phone:  
	                              gmd:CI_Telephone:  
	                              gmd:voice:  1 303 492-6199 
	                           gmd:address:  
	                              gmd:deliveryPoint:  National Snow and Ice Data Center
	                              gmd:city:  Boulder
	                              gmd:administrativeArea:  CO
	                              gmd:postalCode:  80309-0449
	                              gmd:country:  USA
	                              gmd:electronicMailAddress:  nsidc@nsidc.org
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	                                 gmd:linkage:  http://nsidc.org
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	               gmd:citedResponsibleParty:  
	                  gmd:CI_ResponsibleParty:  
	                     gmd:individualName:  NOAA User Services
	                     gmd:organisationName:  National Oceanic and Atmospheric Administration
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	                           gmd:phone:  
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	                              gmd:voice:  1 303 492-6199 x
	                           gmd:address:  
	                              gmd:deliveryPoint:  National Snow and Ice Data Center
	                              gmd:city:  Boulder
	                              gmd:administrativeArea:  CO
	                              gmd:postalCode:  80309-0449
	                              gmd:country:  USA
	                              gmd:electronicMailAddress:  nsidc@nsidc.org
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	         gmd:Abstract:  
	
	            This data set provides a Climate Data Record (CDR) of sea ice concentration 
	            from passive microwave data. It provides a consistent, daily and monthly time 
	            series of sea ice concentrations from 09 July 1987 through through most recent 
	            processing for both the north and south polar regions on a 25 km x 25 km grid. 
	            

The NOAA/NSIDC CDR is based on the recommendations from the National 
	            Research Council (NRC) (2004). It is produced from gridded brightness 
	            temperatures from the Defense Meteorological Satellite Program (DMSP) series 
	            of Special Sensor Microwave Imager (SSM/I) passive microwave radiometers: F-8, 
	            F-11, and F-13.

The NOAA/NSIDC CDR sea ice concentrations are an estimate of 
	            the fraction of ocean area covered by sea ice that is produced by combining 
	            concentration estimates created using two algorithms developed at the NASA 
	            Goddard Space Flight Center (GSFC): the NASA Team algorithm (Cavalieri et al., 
	            1984) and the Bootstrap algorithm (Comiso, 1986). NSIDC applies the individual 
	            algorithms to brightness temperature data from Remote Sensing Systems, Inc. 
	            (RSS).

The data are gridded on the NSIDC polar stereographic grid with 25 x 
	            25 km grid cells and are available in netCDF file format. Each file includes 
	            four different sea ice concentration variables: a variable with the primary 
	            CDR sea ice concentrations created by NSIDC and three variables with sea ice 
	            concentrations created by Goddard. 

The three Goddard-produced sea ice 
	            concentrations are the Goddard NASA Team algorithm sea ice concentrations, the 
	            Goddard Bootstrap sea ice concentrations, and a merged version of the two sea 
	            ice concentrations. These Goddard-produced sea ice concentrations are included 
	            in the data files for a number of reasons. First, the merged Goddard NASA 
	            Team/Bootstrap sea ice concentrations are an ancillary data set that is 
	            analogous to the NOAA/NSIDC CDR data but that adds late 1978 through mid 1987 
	            data to the record. A different instrument, the Scanning Multichannel 
	            Microwave Radiometer (SMMR), was the source for the brightness temperatures 
	            from this period. Sea ice concentrations from the extended period are not part 
	            of the primary NSIDC-produced CDR record because complete documentation of the 
	            SMMR brightness temperature processing method is not available. Second, the 
	            separate Goddard NASA Team and Bootstrap sea ice concentrations are provided 
	            for reference.

Variables containing standard deviation, quality flags, and 
	            projection information are also included in the netCDF files.
	         gmd:Purpose:  Scientific Research
	         gmd:Credit:  Meier, W., F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve. 2013. NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration. Version 2. [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. http://dx.doi.org/10.7265/N55M63M1. 
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	            gmd:individualName:  Walt Meier
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	            gmd:individualName:  F. Fetterer
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	         gmd:CI_ResponsibleParty:  
	            gmd:individualName:  Ruth Duerr
	            gmd:organisationName:  Cooperative Institute for Research in Environmental Sciences, CU Boulder
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	                     gmd:CI_Telephone:  
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	         gmd:CI_ResponsibleParty:  
	            gmd:individualName:  Julienne Stroeve
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	                  gmd:address:  
	                     gmd:deliveryPoint:  National Snow and Ice Data Center
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	            gmd:individualName:  Matthew Savoie
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	            gmd:individualName:  Sean Mallory
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	            gmd:keyword:  Geographic Region > Arctic
	            gmd:keyword:  Geographic Region > Polar
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	            gmd:keyword:  Passive Microwave Data
	            gmd:keyword:  Passive Microwave Sea Ice Data
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	            gmd:keyword:  Sea Ice Concentration
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	               gmi:instrument:  
	                  gco:CharacterString:  N/A
	         gmi:platform:  
	            gmi:MI_Platform:  
	               gmi:identifier:  
	                  gmd:MD_Identifier:  
	                     gmd:code:  
	                        gco:CharacterString:  DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11
	               gmi:description:  
	                  gco:CharacterString:  satellite
	               gmi:instrument:  
	                  gco:CharacterString:  N/A
	         gmi:platform:  
	            gmi:MI_Platform:  
	               gmi:identifier:  
	                  gmd:MD_Identifier:  
	                     gmd:code:  
	                        gco:CharacterString:  DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
	               gmi:description:  
	                  gco:CharacterString:  satellite
	               gmi:instrument:  
	                  gco:CharacterString:  N/A
	         gmi:platform:  
	            gmi:MI_Platform:  
	               gmi:identifier:  
	                  gmd:MD_Identifier:  
	                     gmd:code:  
	                        gco:CharacterString:  DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8
	               gmi:description:  
	                  gco:CharacterString:  satellite
	               gmi:instrument:  
	                  gco:CharacterString:  N/A
	         gmi:platform:  
	            gmi:MI_Platform:  
	               gmi:identifier:  
	                  gmd:MD_Identifier:  
	                     gmd:code:  
	                        gco:CharacterString:  NIMBUS-7
	               gmi:description:  
	                  gco:CharacterString:  satellite
	               gmi:instrument:  
	                  gco:CharacterString:  N/A