Antarctic coastal exposure length and index, 1979-2020
Progress Code: completed Statement: Data quality is fully described in the paper. Additional information is also provided in the dataset download. Purpose To provide the basic code and initial dataset for coastal exposure length and coastal exposure index. Described fully in (https://doi.org/10.2120...
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ftands:oai:ands.org.au::2817954 2023-12-03T10:13:41+01:00 Antarctic coastal exposure length and index, 1979-2020 Spatial: westlimit=-180; southlimit=-77; eastlimit=-180; northlimit=-60 Temporal: From 1979-01-01 to 2020-12-31 https://researchdata.edu.au/antarctic-coastal-exposure-1979-2020/2817954 unknown Australian Ocean Data Network https://researchdata.edu.au/antarctic-coastal-exposure-1979-2020/2817954 AAS_4116_4528_Coastal_Exposure Dataset DOI AU/AADC > Australian Antarctic Data Centre, Australia oceans EARTH SCIENCE > OCEANS > SEA ICE COASTAL PROCESSES > SHORELINES SEA ICE > SEA ICE CONCENTRATION CRYOSPHERE > COASTAL EXPOSURE INDEX IMAGERY CAMERAS Computer > Computer SATELLITES AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN dataset ftands 2023-11-06T23:50:29Z Progress Code: completed Statement: Data quality is fully described in the paper. Additional information is also provided in the dataset download. Purpose To provide the basic code and initial dataset for coastal exposure length and coastal exposure index. Described fully in (https://doi.org/10.21203/rs.3.rs-636839/v1 holder). Data The main CEL method, and a subsidiary Coastal Exposure Index or CEI (both described below), are based on daily sea-ice concentration products for the period 1979 through 2020. These products are derived from the multi-satellite passive-microwave brightness temperature time series using the NASA Team algorithm, mapped at 25 km x 25 km resolution and obtained from the NASA National Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC). Both algorithms are designed to be adaptable for different resolution data. Complete coverage of the entire Antarctic coastal and sea-ice zones is obtained on a daily basis, except for 1979-July 1987 (once every two days). Missing single days during this period are interpolated from the adjoining day's sea-ice concentration values. Averages and climatologies are based on the period 1979-2020, unless otherwise stated. The continental land mask used (gsfc_25s.msk) is also obtained from NSIDC, and includes ice shelves (the seaward extremities of which are taken here to be coastline). Coastline grid points are defined from the continental land mask as any ocean grid point that has land/ice sheet adjacent to it. Analysis methods For this study, we developed two new but different algorithms for quantifying and monitoring Antarctic coastal exposure: the Coastal Exposure Index (CEI) and Coastal Exposure Length (CEL) method. The CEI technique is based on the detection of sea ice presence/absence radially out (northwards) from the coastline along each meridian (at one degree longitudinal spacing), following masking of the ice sheet. The CEI is simply defined as the number of longitudes with no sea ice (threshold set to less than 15% ... Dataset Antarc* Antarctic Ice Sheet Ice Shelves National Snow and Ice Data Center Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
oceans EARTH SCIENCE > OCEANS > SEA ICE COASTAL PROCESSES > SHORELINES SEA ICE > SEA ICE CONCENTRATION CRYOSPHERE > COASTAL EXPOSURE INDEX IMAGERY CAMERAS Computer > Computer SATELLITES AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
spellingShingle |
oceans EARTH SCIENCE > OCEANS > SEA ICE COASTAL PROCESSES > SHORELINES SEA ICE > SEA ICE CONCENTRATION CRYOSPHERE > COASTAL EXPOSURE INDEX IMAGERY CAMERAS Computer > Computer SATELLITES AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN Antarctic coastal exposure length and index, 1979-2020 |
topic_facet |
oceans EARTH SCIENCE > OCEANS > SEA ICE COASTAL PROCESSES > SHORELINES SEA ICE > SEA ICE CONCENTRATION CRYOSPHERE > COASTAL EXPOSURE INDEX IMAGERY CAMERAS Computer > Computer SATELLITES AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
description |
Progress Code: completed Statement: Data quality is fully described in the paper. Additional information is also provided in the dataset download. Purpose To provide the basic code and initial dataset for coastal exposure length and coastal exposure index. Described fully in (https://doi.org/10.21203/rs.3.rs-636839/v1 holder). Data The main CEL method, and a subsidiary Coastal Exposure Index or CEI (both described below), are based on daily sea-ice concentration products for the period 1979 through 2020. These products are derived from the multi-satellite passive-microwave brightness temperature time series using the NASA Team algorithm, mapped at 25 km x 25 km resolution and obtained from the NASA National Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC). Both algorithms are designed to be adaptable for different resolution data. Complete coverage of the entire Antarctic coastal and sea-ice zones is obtained on a daily basis, except for 1979-July 1987 (once every two days). Missing single days during this period are interpolated from the adjoining day's sea-ice concentration values. Averages and climatologies are based on the period 1979-2020, unless otherwise stated. The continental land mask used (gsfc_25s.msk) is also obtained from NSIDC, and includes ice shelves (the seaward extremities of which are taken here to be coastline). Coastline grid points are defined from the continental land mask as any ocean grid point that has land/ice sheet adjacent to it. Analysis methods For this study, we developed two new but different algorithms for quantifying and monitoring Antarctic coastal exposure: the Coastal Exposure Index (CEI) and Coastal Exposure Length (CEL) method. The CEI technique is based on the detection of sea ice presence/absence radially out (northwards) from the coastline along each meridian (at one degree longitudinal spacing), following masking of the ice sheet. The CEI is simply defined as the number of longitudes with no sea ice (threshold set to less than 15% ... |
format |
Dataset |
title |
Antarctic coastal exposure length and index, 1979-2020 |
title_short |
Antarctic coastal exposure length and index, 1979-2020 |
title_full |
Antarctic coastal exposure length and index, 1979-2020 |
title_fullStr |
Antarctic coastal exposure length and index, 1979-2020 |
title_full_unstemmed |
Antarctic coastal exposure length and index, 1979-2020 |
title_sort |
antarctic coastal exposure length and index, 1979-2020 |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/antarctic-coastal-exposure-1979-2020/2817954 |
op_coverage |
Spatial: westlimit=-180; southlimit=-77; eastlimit=-180; northlimit=-60 Temporal: From 1979-01-01 to 2020-12-31 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ice Sheet Ice Shelves National Snow and Ice Data Center Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelves National Snow and Ice Data Center Sea ice Southern Ocean |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/antarctic-coastal-exposure-1979-2020/2817954 AAS_4116_4528_Coastal_Exposure Dataset DOI |
_version_ |
1784260541847437312 |