TemperateReefBase Geonetwork Catalogue
The maximum extent of sea ice in the southern hemisphere by day and by winter season
These data give the maximum extent of sea ice in the southern hemisphere by day and by winter season and the mean maximum extent by month.
Data cover the 1979/1980 to 2007/2008 seasons.
The data are available in csv files and, in the case of the mean monthly data, as point and line shapefiles.
Simple
Identification info
- Alternate title
- The maximum extent of sea ice in the southern hemisphere by day and by winter season
- Date (Publication)
- 2009-10-02
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.26179/5d26b65dcda05
Originator
Raymond, B.
Publisher
Australian Antarctic Data Centre
Principal investigator
Collaborator
- Name
- CAASM Metadata
- Status
- Completed
Custodian
AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
- Topic category
-
- Climatology, meteorology, atmosphere
- Oceans
Extent
N
S
E
W
))
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 1978-10-26 2009-05-16
- Title
- Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data.
- Date (Publication)
- 1996
Author
Cavalieri, D., C. Parkinson, P. Gloersen, and H. J. Zwally
Publisher
National Snow and Ice Data Center
Boulder
- Name
- Digital media
- Other citation details
- updated 2008
- Title
- Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data
- Date (Publication)
- 2006
Author
Meier, W., F. Fetterer, K. Knowles, M. Savoie, M. J. Brodzik
Publisher
National Snow and Ice Data Center
Boulder
- Name
- Digital media
- Other citation details
- updated quarterly
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT
- EARTH SCIENCE > CRYOSPHERE > SEA ICE
- EARTH SCIENCE > OCEANS > SEA ICE > ICE EXTENT
- EARTH SCIENCE > OCEANS > SEA ICE
- Keywords
-
- sea ice
- sea ice extent
- microwave
- southern hemisphere
- NASA/GCMD Earth Science Keywords
-
- SMMR > Scanning Multichannel Microwave Radiometer
- SSM/I > Special Sensor Microwave/Imager
- NASA/GCMD Earth Science Keywords
-
- DMSP > Defense Meteorological Satellite Program
- Nimbus-7
- SATELLITES
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- CEOS
- AMD
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- CONTINENT > ANTARCTICA
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are publicly available for download from the provided URLs.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Distributor
- Fees
- Free
- Planned available datetime
- 2009-10-02T00:00:00
Distributor
- Fees
- Free
- Planned available datetime
- 2009-10-02T00:00:00
- Units of distribution
- kb
- Transfer size
- 32
- Distribution format
-
- csv
- Units of distribution
- kb
- Transfer size
- 312
- Distribution format
-
- csv, shapefile, png
- OnLine resource
-
GET DATA
Download point for the seasonal data - csv file
- OnLine resource
-
GET DATA
Download point for the daily data - csv file
- OnLine resource
-
GET DATA
Download point for the mean monthly data - csv file, shapefiles, image
- OnLine resource
-
GET DATA
Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset
Resource lineage
- Statement
- Methods Sea ice extents were calculated from passive microwave estimates of mean sea ice concentration (Cavalieri et al., 1996 updated 2008; Meier et al., 2006 updated quarterly). Seasonal maximum extent A season was considered to extend from the 1st of July of one year to 30th of June of the next. The extent of sea ice for a season was computed by searching for all pixels that were covered by at least 15% sea ice during at least one month of the season. The maximum latitude of sea ice extent was then calculated in one-degree longitude sectors, with sectors centred on integer longitudes from 179W to 180E. Areas of open water fully enclosed within the sea ice were disregarded for the purposes of calculating maximum latitude. Isolated regions of ice lying to the north of the main ice pack were also disregarded if they were separated from the main pack by at least 2 degrees of latitude (there were only a small number of instances of this situation). Daily maximum extent The maximum latitude of sea ice extent was calculated from daily estimates of sea ice concentration. Due to the increased presence of false ice in daily data (compared to monthly), an additional filtering step was applied during the calculation of daily extents. This filtering removed any areas of sea ice that were isolated from the Antarctic continent and which were less than 10 pixels in extent. The maximum latitude of sea ice was then calculated along transects centred on each integer degree of longitude. The area of open water lying to the south of the ice edge was also calculated for each transect (expressed as a fraction of the total area between the ice edge and the coastline).
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2009-10-02 - record created by Dave Connell at the request of Ben Raymond. 2009-10-07 - record updated by Ben Raymond to include other sea-ice data. 2011-05-10 - record updated by Dave Connell to correct a URL. 2012-05-04 - David Smith linked to the record mean monthly data created by Ben Raymond. Edited Summary, Access Constraints, Distribution Information. Added a Related URL. 2019-07-11 - record updated by Dave Connell - basic updates. 2022-05-04 - record updated by Dave Connell for ISO compliance.
Metadata
- Metadata identifier
- string/sea_ice_extent_winter
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Australian Antarctic Division
Owner
AADC
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 1035f53d-910d-4415-b7cc-b801380b334e
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2022-05-04T14:04:02
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/sea_ice_extent_winter
Point of truth for the metadata record
- Date info (Creation)
- 2009-10-02T00:00:00
- Date info (Last Update)
- 2022-05-04
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available