Search: onr:"swepub:oai:DiVA.org:su-172035" >
Effects of an Explo...
Effects of an Explosive Polar Cyclone Crossing the Antarctic Marginal Ice Zone
-
- Vichi, Marcello (author)
- Univ Cape Town, Dept Oceanog, Cape Town, South Africa;Univ Cape Town, Marine Res Inst, Cape Town, South Africa
-
- Eayrs, Clare (author)
- New York Univ Abu Dhabi, Ctr Global Sea Level Change, Abu Dhabi, U Arab Emirates
-
- Alberello, Alberto (author)
- Univ Adelaide, Sch Math Sci, Adelaide, SA, Australia;Univ Melbourne, Dept Infrastruct Engn, Parkville, Vic, Australia
-
show more...
-
- Bekker, Anriëtte (author)
- Stellenbosch Univ, Sound & Vibrat Res Grp, Dept Mech & Mechatron Engn, Stellenbosch, South Africa
-
- Bennetts, Luke (author)
- Univ Adelaide, Sch Math Sci, Adelaide, SA, Australia
-
- Holland, David (author)
- New York Univ Abu Dhabi, Ctr Global Sea Level Change, Abu Dhabi, U Arab Emirates;NYU, Courant Inst Math Sci, Ctr Atmosphere Ocean Sci, New York, NY USA
-
- de Jong, Ehlke (author)
- Univ Cape Town, Dept Oceanog, Cape Town, South Africa
-
- Joubert, Warren (author)
- South African Weather Serv, Pretoria, South Africa
-
- MacHutchon, Keith (author)
- Univ Cape Town, Dept Civil Engn, Cape Town, South Africa
-
- Messori, Gabriele (author)
- Uppsala universitet,Stockholms universitet,Meteorologiska institutionen (MISU),Uppsala University, Sweden,Luft-, vatten- och landskapslära,Stockholm Univ, Dept Meteorol, Stockholm, Sweden;Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden
-
- Mojica, Jhon F. (author)
- New York Univ Abu Dhabi, Ctr Global Sea Level Change, Abu Dhabi, U Arab Emirates
-
- Onorato, Miguel (author)
- Univ Torino, Dipartimento Fis, Turin, Italy;Ist Nazl Fis Nucl, Sez Torino, Turin, Italy
-
- Saunders, Clinton (author)
- Stellenbosch Univ, Sound & Vibrat Res Grp, Dept Mech & Mechatron Engn, Stellenbosch, South Africa
-
- Skatulla, Sebastian (author)
- Univ Cape Town, Dept Civil Engn, Cape Town, South Africa
-
- Toffoli, Alessandro (author)
- Univ Melbourne, Dept Infrastruct Engn, Parkville, Vic, Australia
-
show less...
-
(creator_code:org_t)
- AMER GEOPHYSICAL UNION, 2019
- 2019
- English.
-
In: Geophysical Research Letters. - : AMER GEOPHYSICAL UNION. - 0094-8276 .- 1944-8007. ; 46:11, s. 5948-5958
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://uu.diva-port... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- 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. Plain Language Summary The extent of Antarctic sea ice is characterized by large regional variations that are in stark contrast with the alarming decreasing trends found in the Arctic. This is partly due to the presence of severe weather events, like extratropical cyclones travelling through the Southern Ocean and reaching the marginal ice zone (MIZ). The MIZ is a region where the ocean, atmosphere, and sea ice processes are closely interlinked. We provide direct evidence of how winter polar cyclones rearrange the MIZ and how their effects extend into the ice-covered region as far as the Antarctic continent. We present the first observations of large ice drift, ice concentration, and temperature changes as an explosively deepening cyclone crosses the MIZ. This case study is complemented by analysis of subsequent but more frequent storms that confirms how storminess in the Southern Ocean maintains a sea ice surface that is less compact, more mobile, and more extended than previously anticipated. Our results urge the scientific community to revise the current definition of the MIZ and improve its representation in models to better include the role of polar cyclones in detecting Antarctic sea ice trends.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Vichi, Marcello
-
Eayrs, Clare
-
Alberello, Alber ...
-
Bekker, Anriëtte
-
Bennetts, Luke
-
Holland, David
-
show more...
-
de Jong, Ehlke
-
Joubert, Warren
-
MacHutchon, Keit ...
-
Messori, Gabriel ...
-
Mojica, Jhon F.
-
Onorato, Miguel
-
Saunders, Clinto ...
-
Skatulla, Sebast ...
-
Toffoli, Alessan ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Oceanography Hyd ...
- Articles in the publication
-
Geophysical Rese ...
- By the university
-
Stockholm University
-
Uppsala University