Abstract
Antarctic sea ice shows a large degree of regional variability, which is partly driven by severe weather events. Here we bring a new perspective on synoptic sea ice changes by presenting the first in situ observations of an explosive extratropical cyclone crossing the winter Antarctic marginal ice zone (MIZ) in the South Atlantic. This is complemented by the analysis of subsequent cyclones and highlights the rapid variations that ice-landing cyclones cause on sea ice: Midlatitude warm oceanic air is advected onto the ice, and storm waves generated close to the ice edge contribute to the maintenance of an unconsolidated surface through which waves propagate far into the ice. MIZ features may thus extend further poleward in the Southern Ocean than currently estimated. A concentration-based MIZ definition is inadequate, since it fails to describe a sea ice configuration which is deeply rearranged by synoptic weather.
| Original language | English |
|---|---|
| Pages (from-to) | 5948-5958 |
| Number of pages | 11 |
| Journal | Geophysical Research Letters |
| Volume | 46 |
| Issue number | 11 |
| Early online date | 11 May 2019 |
| DOIs | |
| Publication status | Published - 16 Jun 2019 |
| Externally published | Yes |
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Effects of an explosive polar cyclone crossing the Antarctic marginal ice zone. / Vichi, Marcello; Eayrs, Clare; Alberello, Alberto; Bekker, Anriëtte; Bennetts, Luke; Holland, David; de Jong, Ehlke; Joubert, Warren; MacHutchon, Keith; Messori, Gabriele; Mojica, Jhon F.; Onorato, Miguel; Saunders, Clinton; Skatulla, Sebastian; Toffoli, Alessandro.
In: Geophysical Research Letters, Vol. 46, No. 11, 16.06.2019, p. 5948-5958.Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Effects of an explosive polar cyclone crossing the Antarctic marginal ice zone
AU - Vichi, Marcello
AU - Eayrs, Clare
AU - Alberello, Alberto
AU - Bekker, Anriëtte
AU - Bennetts, Luke
AU - Holland, David
AU - de Jong, Ehlke
AU - Joubert, Warren
AU - MacHutchon, Keith
AU - Messori, Gabriele
AU - Mojica, Jhon F.
AU - Onorato, Miguel
AU - Saunders, Clinton
AU - Skatulla, Sebastian
AU - Toffoli, Alessandro
N1 - Funding Information: This work was possible thanks to funding from the South African Department of Science and Technology and the National Research Foundation through the South African National Antarctic Program (grants 93089, 104839, 105858) and the NRF‐ STINT bilateral programme (grant 112632). We are indebted to Captain Knowledge Bengu and the crew of the SA Agulhas II for their invaluable contribution to data collection. The contribution of the Department of Environmental Affairs (Oceans and Coasts) is also acknowledged. We would like to thank all the students onboard who contributed to the deployment of the instruments and for working nonstop under challenging conditions. M. V. wishes to thank Dorotea Iovino for the helpful discussions. A. A., L. B., and A. T. acknowledge support from the ACE Foundation and Ferring Pharmaceuticals and from the Australian Antarctic Science Program (project 4434). A. A. and A. T. also acknowledge the Air‐sea ice Lab project. G. M. acknowledges the Swedish Research Council grant 2016‐ 03724 and the Swedish Foundation for International Cooperation in Research and Higher Education grant SA2017‐ 7063. C. E. was funded by NYUAD Center for global Sea Level Change project G1204. We would like to thank Philip Rodenbough and the Scientific Writing Program at New York University Abu Dhabi for feedback on the manuscript. The authors acknowl edge the insightful comments of two anonymous reviewers who helped to improve the work. ERA5 and ERA‐ interim reanalyses were obtained from the Copernicus Climate Change Service Information and from the ECMWF website, respectively. The low‐ resolution sea ice drift product was downloaded from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF, www.osi‐saf.org). MODIS Terra and SUOMI NPP/VIIRS daily mosaic images have been obtained online (worldview.earthdata.nasa.gov). Sea ice buoy and observation data are publicly available and referenced in the main text. Funding Information: This work was possible thanks to funding from the South African Department of Science and Technology and the National Research Foundation through the South African National Antarctic Program (grants 93089,?104839, 105858)?and the NRF-STINT bilateral programme?(grant 112632). We are indebted to Captain Knowledge Bengu and the crew of the SA Agulhas II for their invaluable contribution to data collection. The contribution of the Department of Environmental Affairs (Oceans and Coasts) is also acknowledged. We would like to thank all the students onboard who contributed to the deployment of the instruments and for working nonstop under challenging conditions. M. V. wishes to thank Dorotea Iovino for the helpful discussions. A. A., L. B., and A. T. acknowledge support from the ACE Foundation and Ferring Pharmaceuticals and from the Australian Antarctic Science Program (project 4434). A. A. and A. T. also acknowledge the Air-sea ice Lab project. G. M. acknowledges the Swedish Research Council grant 2016-03724 and the Swedish Foundation for International Cooperation in Research and Higher Education grant SA2017-7063. C. E. was funded by NYUAD Center for global Sea Level Change project G1204. We would like to thank Philip Rodenbough and the Scientific Writing Program at New York University Abu Dhabi for feedback on the manuscript. The authors acknowledge the insightful comments of two anonymous reviewers who helped to improve the work. ERA5 and ERA-interim reanalyses were obtained from the Copernicus Climate Change Service Information and from the ECMWF website, respectively. The low-resolution sea ice drift product was downloaded from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF, www.osi-saf.org). MODIS Terra and SUOMI NPP/VIIRS daily mosaic images have been obtained online (worldview.earthdata.nasa.gov). Sea ice buoy and observation data are publicly available and referenced in the main text. Publisher Copyright: ©2019. The Authors.
PY - 2019/6/16
Y1 - 2019/6/16
N2 - Antarctic sea ice shows a large degree of regional variability, which is partly driven by severe weather events. Here we bring a new perspective on synoptic sea ice changes by presenting the first in situ observations of an explosive extratropical cyclone crossing the winter Antarctic marginal ice zone (MIZ) in the South Atlantic. This is complemented by the analysis of subsequent cyclones and highlights the rapid variations that ice-landing cyclones cause on sea ice: Midlatitude warm oceanic air is advected onto the ice, and storm waves generated close to the ice edge contribute to the maintenance of an unconsolidated surface through which waves propagate far into the ice. MIZ features may thus extend further poleward in the Southern Ocean than currently estimated. A concentration-based MIZ definition is inadequate, since it fails to describe a sea ice configuration which is deeply rearranged by synoptic weather.
AB - Antarctic sea ice shows a large degree of regional variability, which is partly driven by severe weather events. Here we bring a new perspective on synoptic sea ice changes by presenting the first in situ observations of an explosive extratropical cyclone crossing the winter Antarctic marginal ice zone (MIZ) in the South Atlantic. This is complemented by the analysis of subsequent cyclones and highlights the rapid variations that ice-landing cyclones cause on sea ice: Midlatitude warm oceanic air is advected onto the ice, and storm waves generated close to the ice edge contribute to the maintenance of an unconsolidated surface through which waves propagate far into the ice. MIZ features may thus extend further poleward in the Southern Ocean than currently estimated. A concentration-based MIZ definition is inadequate, since it fails to describe a sea ice configuration which is deeply rearranged by synoptic weather.
UR - http://www.scopus.com/inward/record.url?scp=85067680480&partnerID=8YFLogxK
U2 - 10.1029/2019GL082457
DO - 10.1029/2019GL082457
M3 - Article
AN - SCOPUS:85067680480
VL - 46
SP - 5948
EP - 5958
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 11
ER -