Tropical decadal variability and the rate of Arctic Sea ice decrease
The trend for cold-season (November-December-January-February, NDJF) decreases in Arctic sea ice extent from 2000 to 2014 was about a factor of two larger than the 1979-2000 trend, and the warm-season (June-July-August-September, JJAS) trend was about a factor of three larger. Sensitivity experiment...
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Language: | English |
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Online Access: | https://doi.org/10.1029/2018GL079989 |
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ftncar:oai:drupal-site.org:articles_22180 2023-09-05T13:16:13+02:00 Tropical decadal variability and the rate of Arctic Sea ice decrease Meehl, Gerald A. (author) Chung, Christine T. Y. (author) Arblaster, Julie M. (author) Holland, Marika M. (author) Bitz, Cecilia M. (author) 2018-10-28 https://doi.org/10.1029/2018GL079989 en eng Geophysical Research Letters--Geophys. Res. Lett.--00948276 Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 3--10.5067/O57VAIT2AYYY Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1--10.5067/8GQ8LZQVL0VL articles:22180 ark:/85065/d7ft8q1m doi:10.1029/2018GL079989 Copyright 2018 American Geophysical Union. article Text 2018 ftncar https://doi.org/10.1029/2018GL079989 2023-08-14T18:49:08Z The trend for cold-season (November-December-January-February, NDJF) decreases in Arctic sea ice extent from 2000 to 2014 was about a factor of two larger than the 1979-2000 trend, and the warm-season (June-July-August-September, JJAS) trend was about a factor of three larger. Sensitivity experiments with an atmospheric model show that a negative convective heating anomaly in the tropical Pacific, associated with the negative Interdecadal Pacific Oscillation phase after 2000, produces an atmospheric teleconnection pattern over the Arctic comparable to the observations in NDJF but not JJAS. A positive convective heating anomaly over the tropical Atlantic, associated with warming sea surface temperatures there in the 2000-2014 period, produces a teleconnection pattern over the Arctic comparable to the observations in JJAS but not NDJF. Thus, the observed anomalously strong Arctic surface winds and sea ice drifts after 2000, which produced accelerated decreases in sea ice extent, likely had contributions from decadal-time scale variability in the tropical Pacific and Atlantic. Article in Journal/Newspaper Arctic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Pacific Geophysical Research Letters 45 20 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The trend for cold-season (November-December-January-February, NDJF) decreases in Arctic sea ice extent from 2000 to 2014 was about a factor of two larger than the 1979-2000 trend, and the warm-season (June-July-August-September, JJAS) trend was about a factor of three larger. Sensitivity experiments with an atmospheric model show that a negative convective heating anomaly in the tropical Pacific, associated with the negative Interdecadal Pacific Oscillation phase after 2000, produces an atmospheric teleconnection pattern over the Arctic comparable to the observations in NDJF but not JJAS. A positive convective heating anomaly over the tropical Atlantic, associated with warming sea surface temperatures there in the 2000-2014 period, produces a teleconnection pattern over the Arctic comparable to the observations in JJAS but not NDJF. Thus, the observed anomalously strong Arctic surface winds and sea ice drifts after 2000, which produced accelerated decreases in sea ice extent, likely had contributions from decadal-time scale variability in the tropical Pacific and Atlantic. |
author2 |
Meehl, Gerald A. (author) Chung, Christine T. Y. (author) Arblaster, Julie M. (author) Holland, Marika M. (author) Bitz, Cecilia M. (author) |
format |
Article in Journal/Newspaper |
title |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
spellingShingle |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
title_short |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
title_full |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
title_fullStr |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
title_full_unstemmed |
Tropical decadal variability and the rate of Arctic Sea ice decrease |
title_sort |
tropical decadal variability and the rate of arctic sea ice decrease |
publishDate |
2018 |
url |
https://doi.org/10.1029/2018GL079989 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Geophysical Research Letters--Geophys. Res. Lett.--00948276 Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 3--10.5067/O57VAIT2AYYY Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1--10.5067/8GQ8LZQVL0VL articles:22180 ark:/85065/d7ft8q1m doi:10.1029/2018GL079989 |
op_rights |
Copyright 2018 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2018GL079989 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
20 |
_version_ |
1776197890437283840 |