G02202 Meier, W., F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve. 20110920 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/g02202.html http://dx.doi.org/10.7265/N5B56GN3 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 31 December 2007 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. scientific research Meier, W., F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve. 20110920 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/docs/noaa/g02202_ice_conc_cdr/index.html 19781026 20071231 publication date Complete Unknown -180 180 89.84 -89.84 NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Cryosphere > Sea Ice > Sea Ice Concentration EARTH SCIENCE > Oceans > Sea Ice > Sea Ice Concentration None NASA Global Change Master Directory (GCMD) Instrument Keywords SMMR > Scanning Multichannel Microwave Radiometer SSM/I > Special Sensor Microwave/Imager NASA Global Change Master Directory (GCMD) Platform Keywords DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11 DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13 DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8 DMSP > Defense Meteorological Satellite Program NIMBUS-7 ISO 19115 Topic Categories climatologyMeteorologyAtmosphere None Antarctic Arctic Gridded Data Multiyear Sea Ice Concentration Passive Microwave Passive Microwave Data Passive Microwave Sea Ice Data Polar Stereographic Sea Ice Concentration Total Sea Ice Concentration NASA Global Change Master Directory (GCMD) Location Keywords Continent > Antarctica Geographic Region > Arctic Geographic Region > Polar 2 NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Cryosphere > Sea Ice > Sea Ice Concentration NASA Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > Oceans > Sea Ice > Sea Ice Concentration None None NSIDC User Services National Snow and Ice Data Center mailing

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA 1 303 492-6199 x 1 303 492-2468 x nsidc@nsidc.org National Snow and Ice Data Center NSIDC User Services mailing

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA 1 303 492-6199 1 303 492-2468 nsidc@nsidc.org G02202 NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. NetCDF ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02202/ None 20130327 20130327 NSIDC User Services National Snow and Ice Data Center mailing

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA 1 303 492-6199 1 303 492-2468 nsidc@nsidc.org FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata FGDC-STD-012-2002