Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent
Entry ID: noaa_cdc049

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Summary
Abstract: Derived from the Northern Hemisphere EASE-Grid Weekly Snow Cover and
Sea Ice Extent which combines snow cover and sea ice extent at weekly
intervals for October 1978 through August 1995, and snow cover only
for January 1971 through October 1978. (Sea ice data was not available
prior to October 23, 1978.) This data set also includes monthly
climatologies describing average extent, probability of occurrence,
and variance. The data are provided in a 25 km grid, in an azimuthal,
equal area projection (the NSIDC NL EASE-Grid). This dataset has been
interpolated to a 1x1 grid. The snow cover extent is based on the
digital NOAA-NESDIS Weekly Northern Hemisphere Snow Charts, revised by
D. Robinson (Rutgers University) and regridded to the EASE-Grid. The
original NOAA-NESDIS weekly snow charts are derived from the manual
interpretation of AVHRR, GOES and other visible-band satellite
data. Sea ice extent is based on the NSIDC polar stereographic sea ice
concentration grids, derived from Scanning Multi-channel Microwave
Radiometer (SMMR) and Special Sensor Microwave Imager (SSM/I) passive
microwave brightness temperature data. Weekly values are binary where
(1/0) indicated coverage or no coverage. Monthly percent of coverage
values are calculated from the weekly values for that month and are
therefore not integral. Additional information including references
is available here. Also, please read NSIDC's reference page

NOAAServer Codes: [POL 89.50 0.50 180 -180] ; nodateline preview obtain


Purpose: Scientific research.

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Geographic Coverage
 N: 89.5 S: 0.5  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: NOAA-CIRES Climate Diagnostics Center
Dataset Title: Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent
Dataset Release Date: 1995-09-01
Dataset Release Place: Boulder, CO
Dataset Publisher: NOAA-CIRES Climate Diagnostics Center
Online Resource: http://www.cdc.noaa.gov/cdc/data.snowcover.html


Temporal Coverage
Start Date: 1971-01-01
Stop Date: 1995-09-01


Location Keywords
GEOGRAPHIC REGION > NORTHERN HEMISPHERE


Science Keywords
CRYOSPHERE >SNOW/ICE >SNOW COVER    [Definition]
OCEANS >SEA ICE >ICE EXTENT    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
INLAND WATERS
OCEANS


Access Constraints
None.


Use Constraints
None. Acknowledgement of CDC would appreciated in products derived
from these data.


Keywords
Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent [POL 89.50 0.50 180 -180]
Extent of Snow Cover


Data Set Progress
COMPLETE


Data Center
Climate Analysis Branch, Physical Sciences Division, Earth System Research Laboratory, OAR, NOAA, U.S. Department of Commerce    [Information]
Data Center URL: http://www.esrl.noaa.gov/psd/psd1/
Dataset ID: CDC049

Data Center Personnel
Name: ESRL/PSD DATA INQUIRIES
Email: esrl.psd.data at noaa.gov


Personnel
ESRL/PSD DATA INQUIRIES
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: esrl.psd.data at noaa.gov



Creation and Review Dates
DIF Creation Date: 2002-03-25
Last DIF Revision Date: 2009-07-15

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