The maximum extent of sea ice in the southern hemisphere by day and by winter season
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....
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Australian Ocean Data Network
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Online Access: | https://researchdata.ands.org.au/maximum-extent-sea-winter-season/687627 https://data.aad.gov.au/metadata/records/sea_ice_extent_winter https://data.aad.gov.au/eds/2581/download https://data.aad.gov.au/eds/3053/download https://data.aad.gov.au/eds/3259/download http://nsidc.org/data/nsidc-0051.html http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter |
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ftands:oai:ands.org.au::687627 2023-05-15T13:46:56+02:00 The maximum extent of sea ice in the southern hemisphere by day and by winter season AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-52.4626; southlimit=-67.7571; westlimit=-179; eastLimit=180 Temporal: From 1978-10-26 to 2009-05-16 https://researchdata.ands.org.au/maximum-extent-sea-winter-season/687627 https://data.aad.gov.au/metadata/records/sea_ice_extent_winter https://data.aad.gov.au/eds/2581/download https://data.aad.gov.au/eds/3053/download https://data.aad.gov.au/eds/3259/download http://nsidc.org/data/nsidc-0051.html http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter unknown Australian Ocean Data Network https://researchdata.ands.org.au/maximum-extent-sea-winter-season/687627 1035f53d-910d-4415-b7cc-b801380b334e https://data.aad.gov.au/metadata/records/sea_ice_extent_winter https://data.aad.gov.au/eds/2581/download https://data.aad.gov.au/eds/3053/download https://data.aad.gov.au/eds/3259/download http://nsidc.org/data/nsidc-0051.html http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter https://data.aad.gov.au climatologyMeteorologyAtmosphere oceans ICE EXTENT EARTH SCIENCE CRYOSPHERE SEA ICE sea ice extent microwave southern hemisphere SMMR > Scanning Multichannel Microwave Radiometer SSM/I > Special Sensor Microwave/Imager DMSP > Defense Meteorological Satellite Program Nimbus-7 SATELLITES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:08:45Z 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). 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. Dataset Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean The Antarctic Meier ENVELOPE(-45.900,-45.900,-60.633,-60.633) ENVELOPE(-179,180,-52.4626,-67.7571) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
climatologyMeteorologyAtmosphere oceans ICE EXTENT EARTH SCIENCE CRYOSPHERE SEA ICE sea ice extent microwave southern hemisphere SMMR > Scanning Multichannel Microwave Radiometer SSM/I > Special Sensor Microwave/Imager DMSP > Defense Meteorological Satellite Program Nimbus-7 SATELLITES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR |
spellingShingle |
climatologyMeteorologyAtmosphere oceans ICE EXTENT EARTH SCIENCE CRYOSPHERE SEA ICE sea ice extent microwave southern hemisphere SMMR > Scanning Multichannel Microwave Radiometer SSM/I > Special Sensor Microwave/Imager DMSP > Defense Meteorological Satellite Program Nimbus-7 SATELLITES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR The maximum extent of sea ice in the southern hemisphere by day and by winter season |
topic_facet |
climatologyMeteorologyAtmosphere oceans ICE EXTENT EARTH SCIENCE CRYOSPHERE SEA ICE sea ice extent microwave southern hemisphere SMMR > Scanning Multichannel Microwave Radiometer SSM/I > Special Sensor Microwave/Imager DMSP > Defense Meteorological Satellite Program Nimbus-7 SATELLITES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR |
description |
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). 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. |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
The maximum extent of sea ice in the southern hemisphere by day and by winter season |
title_short |
The maximum extent of sea ice in the southern hemisphere by day and by winter season |
title_full |
The maximum extent of sea ice in the southern hemisphere by day and by winter season |
title_fullStr |
The maximum extent of sea ice in the southern hemisphere by day and by winter season |
title_full_unstemmed |
The maximum extent of sea ice in the southern hemisphere by day and by winter season |
title_sort |
maximum extent of sea ice in the southern hemisphere by day and by winter season |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/maximum-extent-sea-winter-season/687627 https://data.aad.gov.au/metadata/records/sea_ice_extent_winter https://data.aad.gov.au/eds/2581/download https://data.aad.gov.au/eds/3053/download https://data.aad.gov.au/eds/3259/download http://nsidc.org/data/nsidc-0051.html http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter |
op_coverage |
Spatial: northlimit=-52.4626; southlimit=-67.7571; westlimit=-179; eastLimit=180 Temporal: From 1978-10-26 to 2009-05-16 |
long_lat |
ENVELOPE(-45.900,-45.900,-60.633,-60.633) ENVELOPE(-179,180,-52.4626,-67.7571) |
geographic |
Antarctic Southern Ocean The Antarctic Meier |
geographic_facet |
Antarctic Southern Ocean The Antarctic Meier |
genre |
Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/maximum-extent-sea-winter-season/687627 1035f53d-910d-4415-b7cc-b801380b334e https://data.aad.gov.au/metadata/records/sea_ice_extent_winter https://data.aad.gov.au/eds/2581/download https://data.aad.gov.au/eds/3053/download https://data.aad.gov.au/eds/3259/download http://nsidc.org/data/nsidc-0051.html http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=sea_ice_extent_winter |
_version_ |
1766245746296750080 |