ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica
Antarctica’s sea ice cover is an important component of the global climate system, yet the drivers of sea ice variability are not well understood. Here we investigated the effects of climate variability on sea ice concentration (SIC) around East Antarctica by correlating the 40-years (1979–2018) sat...
Main Authors: | , , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | https://doi.org/10.26686/wgtn.14143904.v1 |
id |
ftsmithonian:oai:figshare.com:article/14143904 |
---|---|
record_format |
openpolar |
spelling |
ftsmithonian:oai:figshare.com:article/14143904 2023-05-15T14:03:24+02:00 ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica Florence E Isaacs (10219985) James Renwick (8509671) Andrew N Mackintosh (10120715) Ruzica Dadic (8509770) 2021-02-16T00:00:00Z https://doi.org/10.26686/wgtn.14143904.v1 unknown https://figshare.com/articles/journal_contribution/ENSO_Modulates_Summer_and_Autumn_Sea_Ice_Variability_Around_Dronning_Maud_Land_Antarctica/14143904 doi:10.26686/wgtn.14143904.v1 CC BY 4.0 CC-BY Atmospheric Sciences Physical Geography and Environmental Geoscience Text Journal contribution 2021 ftsmithonian https://doi.org/10.26686/wgtn.14143904.v1 2021-03-23T17:39:21Z Antarctica’s sea ice cover is an important component of the global climate system, yet the drivers of sea ice variability are not well understood. Here we investigated the effects of climate variability on sea ice concentration (SIC) around East Antarctica by correlating the 40-years (1979–2018) satellite sea ice record and ERA5 reanalysis data. We found that summer and autumn SIC around Dronning Maud Land (DML) between 10 and 70°E exhibited a statistically significant negative correlation with the Niño 3.4 index. Sea ice in DML was also correlated with sea surface temperature (SST) anomalies in the tropical Pacific, and to an atmospheric wave train pattern extending from the South Pacific to DML. We suggest that a southward-propagating atmospheric wave train triggered by SST anomalies in the tropical Pacific extends into DML and alters sea ice concentration by encouraging meridional airflow. Our results showed that shifts in meridional flow in DML affected sea ice thermodynamically, by altering local heat transport and in turn altering sea ice formation and melt. Isaacs, Renwick, Mackintosh & Dadic, 2021, ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica, 'Journal of Geophysical Research: Atmospheres', 126, Citation number, 10.1029/2020jd033140. To view the published open abstract,go to http://dx.doi.org (http://dx.doi.org) and enter the DOI. Other Non-Article Part of Journal/Newspaper Antarc* Antarctica DML Dronning Maud Land East Antarctica Sea ice Unknown East Antarctica Dronning Maud Land Pacific Mackintosh ENVELOPE(-59.981,-59.981,-72.879,-72.879) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Atmospheric Sciences Physical Geography and Environmental Geoscience |
spellingShingle |
Atmospheric Sciences Physical Geography and Environmental Geoscience Florence E Isaacs (10219985) James Renwick (8509671) Andrew N Mackintosh (10120715) Ruzica Dadic (8509770) ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
topic_facet |
Atmospheric Sciences Physical Geography and Environmental Geoscience |
description |
Antarctica’s sea ice cover is an important component of the global climate system, yet the drivers of sea ice variability are not well understood. Here we investigated the effects of climate variability on sea ice concentration (SIC) around East Antarctica by correlating the 40-years (1979–2018) satellite sea ice record and ERA5 reanalysis data. We found that summer and autumn SIC around Dronning Maud Land (DML) between 10 and 70°E exhibited a statistically significant negative correlation with the Niño 3.4 index. Sea ice in DML was also correlated with sea surface temperature (SST) anomalies in the tropical Pacific, and to an atmospheric wave train pattern extending from the South Pacific to DML. We suggest that a southward-propagating atmospheric wave train triggered by SST anomalies in the tropical Pacific extends into DML and alters sea ice concentration by encouraging meridional airflow. Our results showed that shifts in meridional flow in DML affected sea ice thermodynamically, by altering local heat transport and in turn altering sea ice formation and melt. Isaacs, Renwick, Mackintosh & Dadic, 2021, ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica, 'Journal of Geophysical Research: Atmospheres', 126, Citation number, 10.1029/2020jd033140. To view the published open abstract,go to http://dx.doi.org (http://dx.doi.org) and enter the DOI. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Florence E Isaacs (10219985) James Renwick (8509671) Andrew N Mackintosh (10120715) Ruzica Dadic (8509770) |
author_facet |
Florence E Isaacs (10219985) James Renwick (8509671) Andrew N Mackintosh (10120715) Ruzica Dadic (8509770) |
author_sort |
Florence E Isaacs (10219985) |
title |
ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
title_short |
ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
title_full |
ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
title_fullStr |
ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
title_full_unstemmed |
ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica |
title_sort |
enso modulates summer and autumn sea ice variability around dronning maud land, antarctica |
publishDate |
2021 |
url |
https://doi.org/10.26686/wgtn.14143904.v1 |
long_lat |
ENVELOPE(-59.981,-59.981,-72.879,-72.879) |
geographic |
East Antarctica Dronning Maud Land Pacific Mackintosh |
geographic_facet |
East Antarctica Dronning Maud Land Pacific Mackintosh |
genre |
Antarc* Antarctica DML Dronning Maud Land East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land East Antarctica Sea ice |
op_relation |
https://figshare.com/articles/journal_contribution/ENSO_Modulates_Summer_and_Autumn_Sea_Ice_Variability_Around_Dronning_Maud_Land_Antarctica/14143904 doi:10.26686/wgtn.14143904.v1 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.26686/wgtn.14143904.v1 |
_version_ |
1766274038047440896 |