Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record
The seasonal evolution of Arctic sea ice can be described by the timing of key dates of sea ice concentration (SIC) change during its annual retreat and advance cycle. Here, we use SICs from a satellite passive microwave climate data record to identify the sea ice dates of opening (DOO), retreat (DO...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/aafb84 |
| _version_ | 1797748040089468928 |
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| author | Angela C Bliss Michael Steele Ge Peng Walter N Meier Suzanne Dickinson |
| author_facet | Angela C Bliss Michael Steele Ge Peng Walter N Meier Suzanne Dickinson |
| author_sort | Angela C Bliss |
| collection | DOAJ |
| description | The seasonal evolution of Arctic sea ice can be described by the timing of key dates of sea ice concentration (SIC) change during its annual retreat and advance cycle. Here, we use SICs from a satellite passive microwave climate data record to identify the sea ice dates of opening (DOO), retreat (DOR), advance (DOA), and closing (DOC) and the periods of time between these events. Regional variability in these key dates, periods, and sea ice melt onset and freeze-up dates for 12 Arctic regions during the melt seasons of 1979–2016 is investigated. We find statistically significant positive trends in the length of the melt season (outer ice-free period) for most of the eastern Arctic, the Bering Sea, and Hudson and Baffin Bays with trends as large as 11.9 d decade ^−1 observed in the Kara Sea. Trends in the DOR and DOA contribute to statistically significant increases in the length of the open water period for all regions within the Arctic Ocean ranging from 3.9 to 13.8 d decade ^−1 . The length of the ice retreat period (DOR−DOO) ranges from 17.1 d in the Sea of Okhotsk to 41 d in the Greenland Sea. The length of the ice advance period (DOC−DOA) is generally much shorter and ranges from 17.9 to 25.3 d in the Sea of Okhotsk and Greenland Sea, respectively. Additionally, we derive the extent of the seasonal ice zone (SIZ) and find statistically significant negative trends (SIZ is shrinking) in the Sea of Okhotsk, Baffin Bay, Greenland Sea, and Barents Sea regions, which are geographically open to the oceans and influenced by reduced winter sea ice extent. Within regions of the Arctic Ocean, statistically significant positive trends indicate that the extent of the SIZ is expanding as Arctic summer sea ice declines. |
| first_indexed | 2024-03-12T15:59:16Z |
| format | Article |
| id | doaj.art-121b51eeac4f44f68a42379ed8a5be8b |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:59:16Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-121b51eeac4f44f68a42379ed8a5be8b2023-08-09T14:41:16ZengIOP PublishingEnvironmental Research Letters1748-93262019-01-0114404500310.1088/1748-9326/aafb84Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data recordAngela C Bliss0https://orcid.org/0000-0001-9208-7024Michael Steele1Ge Peng2Walter N Meier3https://orcid.org/0000-0003-2857-0550Suzanne Dickinson4NASA Goddard Space Flight Center, Cryospheric Sciences Laboratory, Greenbelt, MD 20771, United States of America; University of Maryland , Earth System Science Interdisciplinary Center, College Park, MD 20740, United States of AmericaPolar Science Center, Applied Physics Laboratory, University of Washington , Seattle, WA 98105, United States of AmericaNorth Carolina State University , Cooperative Institute for Climate and Satellites-North Carolina (CSIC-NC) at NOAA’s National Centers for Environmental Information, Asheville, NC 28801, United States of AmericaNational Snow and Ice Data Center, CIRES, University of Colorado , Boulder, CO 80309, United States of AmericaPolar Science Center, Applied Physics Laboratory, University of Washington , Seattle, WA 98105, United States of AmericaThe seasonal evolution of Arctic sea ice can be described by the timing of key dates of sea ice concentration (SIC) change during its annual retreat and advance cycle. Here, we use SICs from a satellite passive microwave climate data record to identify the sea ice dates of opening (DOO), retreat (DOR), advance (DOA), and closing (DOC) and the periods of time between these events. Regional variability in these key dates, periods, and sea ice melt onset and freeze-up dates for 12 Arctic regions during the melt seasons of 1979–2016 is investigated. We find statistically significant positive trends in the length of the melt season (outer ice-free period) for most of the eastern Arctic, the Bering Sea, and Hudson and Baffin Bays with trends as large as 11.9 d decade ^−1 observed in the Kara Sea. Trends in the DOR and DOA contribute to statistically significant increases in the length of the open water period for all regions within the Arctic Ocean ranging from 3.9 to 13.8 d decade ^−1 . The length of the ice retreat period (DOR−DOO) ranges from 17.1 d in the Sea of Okhotsk to 41 d in the Greenland Sea. The length of the ice advance period (DOC−DOA) is generally much shorter and ranges from 17.9 to 25.3 d in the Sea of Okhotsk and Greenland Sea, respectively. Additionally, we derive the extent of the seasonal ice zone (SIZ) and find statistically significant negative trends (SIZ is shrinking) in the Sea of Okhotsk, Baffin Bay, Greenland Sea, and Barents Sea regions, which are geographically open to the oceans and influenced by reduced winter sea ice extent. Within regions of the Arctic Ocean, statistically significant positive trends indicate that the extent of the SIZ is expanding as Arctic summer sea ice declines.https://doi.org/10.1088/1748-9326/aafb84Arcticsea iceseasonal ice zoneclimate indicatorsmelt seasonpassive microwave |
| spellingShingle | Angela C Bliss Michael Steele Ge Peng Walter N Meier Suzanne Dickinson Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record Environmental Research Letters Arctic sea ice seasonal ice zone climate indicators melt season passive microwave |
| title | Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| title_full | Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| title_fullStr | Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| title_full_unstemmed | Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| title_short | Regional variability of Arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| title_sort | regional variability of arctic sea ice seasonal change climate indicators from a passive microwave climate data record |
| topic | Arctic sea ice seasonal ice zone climate indicators melt season passive microwave |
| url | https://doi.org/10.1088/1748-9326/aafb84 |
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