Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations
We report on results of a systematic inter-comparison of 10 global sea-ice concentration (SIC) data products at 12.5 to 50.0 km grid resolution for both the Arctic and the Antarctic. The products are compared with each other with respect to differences in SIC, sea-ice area (SIA), and sea-ice extent...
Published in: | The Cryosphere |
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Language: | English |
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2019
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Online Access: | https://orbit.dtu.dk/en/publications/481f159b-f7da-48bd-b64e-c99691f67c6c https://doi.org/10.5194/tc-13-3261-2019 https://backend.orbit.dtu.dk/ws/files/201062285/tc_13_3261_2019.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/481f159b-f7da-48bd-b64e-c99691f67c6c 2024-06-23T07:45:51+00:00 Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations Kern, Stefan Lavergne, Thomas Notz, Dirk Pedersen, Leif Toudal Tonboe, Rasmus Tage Saldo, Roberto Soerensen, Atle MacDonald 2019 application/pdf https://orbit.dtu.dk/en/publications/481f159b-f7da-48bd-b64e-c99691f67c6c https://doi.org/10.5194/tc-13-3261-2019 https://backend.orbit.dtu.dk/ws/files/201062285/tc_13_3261_2019.pdf eng eng https://orbit.dtu.dk/en/publications/481f159b-f7da-48bd-b64e-c99691f67c6c info:eu-repo/semantics/openAccess Kern , S , Lavergne , T , Notz , D , Pedersen , L T , Tonboe , R T , Saldo , R & Soerensen , A M 2019 , ' Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations ' , Cryosphere , vol. 13 , pp. 3261-3307 . https://doi.org/10.5194/tc-13-3261-2019 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2019 ftdtupubl https://doi.org/10.5194/tc-13-3261-2019 2024-06-04T15:22:33Z We report on results of a systematic inter-comparison of 10 global sea-ice concentration (SIC) data products at 12.5 to 50.0 km grid resolution for both the Arctic and the Antarctic. The products are compared with each other with respect to differences in SIC, sea-ice area (SIA), and sea-ice extent (SIE), and they are compared against a global wintertime near-100 % reference SIC data set for closed pack ice conditions and against global year-round ship-based visual observations of the sea-ice cover. We can group the products based on the concept of their SIC retrieval algorithms. Group I consists of data sets using the self-optimizing EUMETSAT OSI SAF and ESA CCI algorithms. Group II includes data using the Comiso bootstrap algorithm and the NOAA NSIDC sea-ice concentration climate data record (CDR). The standard NASA Team and the ARTIST Sea Ice (ASI) algorithms are put into group III, and NASA Team 2 is the only element of group IV. The three CDRs of group I (SICCI-25km, SICCI-50km, and OSI-450) are biased low compared to a 100 % reference SIC data set with biases of −0.4 % to −1.0 % (Arctic) and −0.3 % to −1.1 % (Antarctic). Products of group II appear to be mostly biased high in the Arctic by between +1.0 % and +3.5 %, while their biases in the Antarctic range from −0.2 % to +0.9 %. Group III product biases are different for the Arctic, +0.9 % (NASA Team) and −3.7 % (ASI), but similar for the Antarctic, −5.4 % and −5.6 %, respectively. The standard deviation is smaller in the Arctic for the quoted group I products (1.9 % to 2.9 %) and Antarctic (2.5 % to 3.1 %) than for group II and III products: 3.6 % to 5.0 % for the Arctic and 4.0 % to 6.5 % for the Antarctic. We refer to the paper to understand why we could not give values for group IV here. We discuss the impact of truncating the SIC distribution, as naturally retrieved by the algorithms around the 100 % sea-ice concentration end. We show that evaluation studies of such truncated SIC products can result in misleading statistics and favour data sets that ... Article in Journal/Newspaper Antarc* Antarctic Arctic Sea ice Technical University of Denmark: DTU Orbit Antarctic Arctic The Antarctic The Cryosphere 13 12 3261 3307 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Kern, Stefan Lavergne, Thomas Notz, Dirk Pedersen, Leif Toudal Tonboe, Rasmus Tage Saldo, Roberto Soerensen, Atle MacDonald Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
We report on results of a systematic inter-comparison of 10 global sea-ice concentration (SIC) data products at 12.5 to 50.0 km grid resolution for both the Arctic and the Antarctic. The products are compared with each other with respect to differences in SIC, sea-ice area (SIA), and sea-ice extent (SIE), and they are compared against a global wintertime near-100 % reference SIC data set for closed pack ice conditions and against global year-round ship-based visual observations of the sea-ice cover. We can group the products based on the concept of their SIC retrieval algorithms. Group I consists of data sets using the self-optimizing EUMETSAT OSI SAF and ESA CCI algorithms. Group II includes data using the Comiso bootstrap algorithm and the NOAA NSIDC sea-ice concentration climate data record (CDR). The standard NASA Team and the ARTIST Sea Ice (ASI) algorithms are put into group III, and NASA Team 2 is the only element of group IV. The three CDRs of group I (SICCI-25km, SICCI-50km, and OSI-450) are biased low compared to a 100 % reference SIC data set with biases of −0.4 % to −1.0 % (Arctic) and −0.3 % to −1.1 % (Antarctic). Products of group II appear to be mostly biased high in the Arctic by between +1.0 % and +3.5 %, while their biases in the Antarctic range from −0.2 % to +0.9 %. Group III product biases are different for the Arctic, +0.9 % (NASA Team) and −3.7 % (ASI), but similar for the Antarctic, −5.4 % and −5.6 %, respectively. The standard deviation is smaller in the Arctic for the quoted group I products (1.9 % to 2.9 %) and Antarctic (2.5 % to 3.1 %) than for group II and III products: 3.6 % to 5.0 % for the Arctic and 4.0 % to 6.5 % for the Antarctic. We refer to the paper to understand why we could not give values for group IV here. We discuss the impact of truncating the SIC distribution, as naturally retrieved by the algorithms around the 100 % sea-ice concentration end. We show that evaluation studies of such truncated SIC products can result in misleading statistics and favour data sets that ... |
format |
Article in Journal/Newspaper |
author |
Kern, Stefan Lavergne, Thomas Notz, Dirk Pedersen, Leif Toudal Tonboe, Rasmus Tage Saldo, Roberto Soerensen, Atle MacDonald |
author_facet |
Kern, Stefan Lavergne, Thomas Notz, Dirk Pedersen, Leif Toudal Tonboe, Rasmus Tage Saldo, Roberto Soerensen, Atle MacDonald |
author_sort |
Kern, Stefan |
title |
Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
title_short |
Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
title_full |
Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
title_fullStr |
Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
title_full_unstemmed |
Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations |
title_sort |
satellite passive microwave sea-ice concentration data set intercomparison: closed ice and ship-based observations |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/481f159b-f7da-48bd-b64e-c99691f67c6c https://doi.org/10.5194/tc-13-3261-2019 https://backend.orbit.dtu.dk/ws/files/201062285/tc_13_3261_2019.pdf |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic Sea ice |
genre_facet |
Antarc* Antarctic Arctic Sea ice |
op_source |
Kern , S , Lavergne , T , Notz , D , Pedersen , L T , Tonboe , R T , Saldo , R & Soerensen , A M 2019 , ' Satellite Passive Microwave Sea-Ice Concentration Data Set Intercomparison: Closed Ice and Ship-Based Observations ' , Cryosphere , vol. 13 , pp. 3261-3307 . https://doi.org/10.5194/tc-13-3261-2019 |
op_relation |
https://orbit.dtu.dk/en/publications/481f159b-f7da-48bd-b64e-c99691f67c6c |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-13-3261-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
12 |
container_start_page |
3261 |
op_container_end_page |
3307 |
_version_ |
1802642664811659264 |