A Collapse of Antarctic Ice Shelves - A Multidecadal Satellite Perspective

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Wednesday, February 1, 3:30pm - 4:30pm (EST)

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24h

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  • (GMT-04:00)America, Puerto Rico
  • (GMT-04:00)America, Santiago
  • (GMT-04:00)America, Santo Domingo
  • (GMT-04:00)America, St Barthelemy
  • (GMT-04:00)America, St Kitts
  • (GMT-04:00)America, St Lucia
  • (GMT-04:00)America, St Thomas
  • (GMT-04:00)America, St Vincent
  • (GMT-04:00)America, Toronto
  • (GMT-04:00)America, Tortola
  • (GMT-03:00)America, Araguaina
  • (GMT-03:00)America, Argentina, Buenos Aires
  • (GMT-03:00)America, Argentina, Catamarca
  • (GMT-03:00)America, Argentina, Cordoba
  • (GMT-03:00)America, Argentina, Jujuy
  • (GMT-03:00)America, Argentina, La Rioja
  • (GMT-03:00)America, Argentina, Mendoza
  • (GMT-03:00)America, Argentina, Rio Gallegos
  • (GMT-03:00)America, Argentina, Salta
  • (GMT-03:00)America, Argentina, San Juan
  • (GMT-03:00)America, Argentina, San Luis
  • (GMT-03:00)America, Argentina, Tucuman
  • (GMT-03:00)America, Argentina, Ushuaia
  • (GMT-03:00)America, Bahia
  • (GMT-03:00)America, Belem
  • (GMT-03:00)America, Cayenne
  • (GMT-03:00)America, Fortaleza
  • (GMT-03:00)America, Glace Bay
  • (GMT-03:00)America, Goose Bay
  • (GMT-03:00)America, Halifax
  • (GMT-03:00)America, Maceio
  • (GMT-03:00)America, Moncton
  • (GMT-03:00)America, Montevideo
  • (GMT-03:00)America, Paramaribo
  • (GMT-03:00)America, Punta Arenas
  • (GMT-03:00)America, Recife
  • (GMT-03:00)America, Santarem
  • (GMT-03:00)America, Sao Paulo
  • (GMT-03:00)America, Thule
  • (GMT-03:00)Antarctica, Palmer
  • (GMT-03:00)Antarctica, Rothera
  • (GMT-03:00)Atlantic, Bermuda
  • (GMT-03:00)Atlantic, Stanley
  • (GMT-02:30)America, St Johns
  • (GMT-02:00)America, Miquelon
  • (GMT-02:00)America, Noronha
  • (GMT-02:00)Atlantic, South Georgia
  • (GMT-01:00)America, Nuuk
  • (GMT-01:00)America, Scoresbysund
  • (GMT-01:00)Atlantic, Cape Verde
  • (GMT+00:00)Africa, Abidjan
  • (GMT+00:00)Africa, Accra
  • (GMT+00:00)Africa, Bamako
  • (GMT+00:00)Africa, Banjul
  • (GMT+00:00)Africa, Bissau
  • (GMT+00:00)Africa, Conakry
  • (GMT+00:00)Africa, Dakar
  • (GMT+00:00)Africa, Freetown
  • (GMT+00:00)Africa, Lome
  • (GMT+00:00)Africa, Monrovia
  • (GMT+00:00)Africa, Nouakchott
  • (GMT+00:00)Africa, Ouagadougou
  • (GMT+00:00)Africa, Sao Tome
  • (GMT+00:00)America, Danmarkshavn
  • (GMT+00:00)Atlantic, Azores
  • (GMT+00:00)Atlantic, Reykjavik
  • (GMT+00:00)Atlantic, St Helena
  • (GMT+00:00)UTC
  • (GMT+01:00)Africa, Algiers
  • (GMT+01:00)Africa, Bangui
  • (GMT+01:00)Africa, Brazzaville
  • (GMT+01:00)Africa, Casablanca
  • (GMT+01:00)Africa, Douala
  • (GMT+01:00)Africa, El Aaiun
  • (GMT+01:00)Africa, Kinshasa
  • (GMT+01:00)Africa, Lagos
  • (GMT+01:00)Africa, Libreville
  • (GMT+01:00)Africa, Luanda
  • (GMT+01:00)Africa, Malabo
  • (GMT+01:00)Africa, Ndjamena
  • (GMT+01:00)Africa, Niamey
  • (GMT+01:00)Africa, Porto-Novo
  • (GMT+01:00)Africa, Tunis
  • (GMT+01:00)Atlantic, Canary
  • (GMT+01:00)Atlantic, Faroe
  • (GMT+01:00)Atlantic, Madeira
  • (GMT+01:00)Europe, Dublin
  • (GMT+01:00)Europe, Guernsey
  • (GMT+01:00)Europe, Isle of Man
  • (GMT+01:00)Europe, Jersey
  • (GMT+01:00)Europe, Lisbon
  • (GMT+01:00)Europe, London
  • (GMT+02:00)Africa, Blantyre
  • (GMT+02:00)Africa, Bujumbura
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  • (GMT+02:00)Africa, Ceuta
  • (GMT+02:00)Africa, Gaborone
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  • (GMT+02:00)Africa, Johannesburg
  • (GMT+02:00)Africa, Juba
  • (GMT+02:00)Africa, Khartoum
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  • (GMT+02:00)Africa, Lusaka
  • (GMT+02:00)Africa, Maputo
  • (GMT+02:00)Africa, Maseru
  • (GMT+02:00)Africa, Mbabane
  • (GMT+02:00)Africa, Tripoli
  • (GMT+02:00)Africa, Windhoek
  • (GMT+02:00)Antarctica, Troll
  • (GMT+02:00)Arctic, Longyearbyen
  • (GMT+02:00)Europe, Amsterdam
  • (GMT+02:00)Europe, Andorra
  • (GMT+02:00)Europe, Belgrade
  • (GMT+02:00)Europe, Berlin
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  • (GMT+02:00)Europe, Copenhagen
  • (GMT+02:00)Europe, Gibraltar
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  • (GMT+03:00)Africa, Addis Ababa
  • (GMT+03:00)Africa, Asmara
  • (GMT+03:00)Africa, Dar es Salaam
  • (GMT+03:00)Africa, Djibouti
  • (GMT+03:00)Africa, Kampala
  • (GMT+03:00)Africa, Mogadishu
  • (GMT+03:00)Africa, Nairobi
  • (GMT+03:00)Antarctica, Syowa
  • (GMT+03:00)Asia, Aden
  • (GMT+03:00)Asia, Amman
  • (GMT+03:00)Asia, Baghdad
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  • (GMT+04:30)Asia, Kabul
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  • (GMT+05:00)Asia, Atyrau
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  • (GMT+05:00)Indian, Kerguelen
  • (GMT+05:00)Indian, Maldives
  • (GMT+05:30)Asia, Colombo
  • (GMT+05:30)Asia, Kolkata
  • (GMT+05:45)Asia, Kathmandu
  • (GMT+06:00)Asia, Almaty
  • (GMT+06:00)Asia, Bishkek
  • (GMT+06:00)Asia, Dhaka
  • (GMT+06:00)Asia, Omsk
  • (GMT+06:00)Asia, Qostanay
  • (GMT+06:00)Asia, Thimphu
  • (GMT+06:00)Asia, Urumqi
  • (GMT+06:00)Indian, Chagos
  • (GMT+06:30)Asia, Yangon
  • (GMT+06:30)Indian, Cocos
  • (GMT+07:00)Antarctica, Davis
  • (GMT+07:00)Asia, Bangkok
  • (GMT+07:00)Asia, Barnaul
  • (GMT+07:00)Asia, Ho Chi Minh
  • (GMT+07:00)Asia, Hovd
  • (GMT+07:00)Asia, Jakarta
  • (GMT+07:00)Asia, Krasnoyarsk
  • (GMT+07:00)Asia, Novokuznetsk
  • (GMT+07:00)Asia, Novosibirsk
  • (GMT+07:00)Asia, Phnom Penh
  • (GMT+07:00)Asia, Pontianak
  • (GMT+07:00)Asia, Tomsk
  • (GMT+07:00)Asia, Vientiane
  • (GMT+07:00)Indian, Christmas
  • (GMT+08:00)Antarctica, Casey
  • (GMT+08:00)Asia, Brunei
  • (GMT+08:00)Asia, Choibalsan
  • (GMT+08:00)Asia, Hong Kong
  • (GMT+08:00)Asia, Irkutsk
  • (GMT+08:00)Asia, Kuala Lumpur
  • (GMT+08:00)Asia, Kuching
  • (GMT+08:00)Asia, Macau
  • (GMT+08:00)Asia, Makassar
  • (GMT+08:00)Asia, Manila
  • (GMT+08:00)Asia, Shanghai
  • (GMT+08:00)Asia, Singapore
  • (GMT+08:00)Asia, Taipei
  • (GMT+08:00)Asia, Ulaanbaatar
  • (GMT+08:00)Australia, Perth
  • (GMT+08:45)Australia, Eucla
  • (GMT+09:00)Asia, Chita
  • (GMT+09:00)Asia, Dili
  • (GMT+09:00)Asia, Jayapura
  • (GMT+09:00)Asia, Khandyga
  • (GMT+09:00)Asia, Pyongyang
  • (GMT+09:00)Asia, Seoul
  • (GMT+09:00)Asia, Tokyo
  • (GMT+09:00)Asia, Yakutsk
  • (GMT+09:00)Pacific, Palau
  • (GMT+09:30)Australia, Adelaide
  • (GMT+09:30)Australia, Broken Hill
  • (GMT+09:30)Australia, Darwin
  • (GMT+10:00)Antarctica, DumontDUrville
  • (GMT+10:00)Antarctica, Macquarie
  • (GMT+10:00)Asia, Ust-Nera
  • (GMT+10:00)Asia, Vladivostok
  • (GMT+10:00)Australia, Brisbane
  • (GMT+10:00)Australia, Hobart
  • (GMT+10:00)Australia, Lindeman
  • (GMT+10:00)Australia, Melbourne
  • (GMT+10:00)Australia, Sydney
  • (GMT+10:00)Pacific, Chuuk
  • (GMT+10:00)Pacific, Guam
  • (GMT+10:00)Pacific, Port Moresby
  • (GMT+10:00)Pacific, Saipan
  • (GMT+10:30)Australia, Lord Howe
  • (GMT+11:00)Asia, Magadan
  • (GMT+11:00)Asia, Sakhalin
  • (GMT+11:00)Asia, Srednekolymsk
  • (GMT+11:00)Pacific, Bougainville
  • (GMT+11:00)Pacific, Efate
  • (GMT+11:00)Pacific, Guadalcanal
  • (GMT+11:00)Pacific, Kosrae
  • (GMT+11:00)Pacific, Norfolk
  • (GMT+11:00)Pacific, Noumea
  • (GMT+11:00)Pacific, Pohnpei
  • (GMT+12:00)Antarctica, McMurdo
  • (GMT+12:00)Asia, Anadyr
  • (GMT+12:00)Asia, Kamchatka
  • (GMT+12:00)Pacific, Auckland
  • (GMT+12:00)Pacific, Fiji
  • (GMT+12:00)Pacific, Funafuti
  • (GMT+12:00)Pacific, Kwajalein
  • (GMT+12:00)Pacific, Majuro
  • (GMT+12:00)Pacific, Nauru
  • (GMT+12:00)Pacific, Tarawa
  • (GMT+12:00)Pacific, Wake
  • (GMT+12:00)Pacific, Wallis
  • (GMT+12:45)Pacific, Chatham
  • (GMT+13:00)Pacific, Apia
  • (GMT+13:00)Pacific, Fakaofo
  • (GMT+13:00)Pacific, Kanton
  • (GMT+13:00)Pacific, Tongatapu
  • (GMT+14:00)Pacific, Kiritimati

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    The Meteorology and Atmospheric Science Colloquia presents Shujie Wang and her presentation on "A Collapse of Antarctic Ice Shelves - A Multidecadal Satellite Perspective."

    Shujie Wang, Penn State
    February 1, 2023
    3:30 - 4:30 p.m.
    112 Walker Building
    More information available at: 
    http://www.met.psu.edu/news-events/events/meteo-colloquia

    Abstract
    Rapid retreat of the Larsen A and B ice shelves has provided important clues about the ice shelf destabilization processes. The Larsen C Ice Shelf, the largest remaining ice shelf on the Antarctic Peninsula, may also be vulnerable to future collapse in a warming climate. Here, we utilize multisource satellite images collected over 1963–2020 to derive multidecadal time series of ice front, flow velocities, and critical rift features over Larsen C, with the aim of understanding the controls on its retreat. We complement these observations with modeling experiments using the Ice-sheet and Sea-level System Model to examine how front geometry conditions and mechanical weakening due to rifts affect ice shelf dynamics. Over the past six decades, Larsen C lost over 20% of its area, dominated by rift-induced tabular iceberg calving. The Bawden Ice Rise and Gipps Ice Rise are critical areas for rift formation, through their impact on the longitudinal deviatoric stress field. Mechanical weakening around Gipps Ice Rise is found to be an important control on localized flow acceleration and the propagation of two rifts that caused a major calving event in 2017. Capturing the time-varying effects of rifts on ice rigidity in ice shelf models is essential for making realistic predictions of ice shelf flow dynamics and instability. In the context of the Larsen A and Larsen B collapses, we infer a chronology of destabilization processes for embayment-confined ice shelves, which provides a useful framework for understanding the historical and future destabilization of Antarctic ice shelves

    Add to Calendar 2023/02/01 15:30:00 2023/02/01 16:30:00 America/New_York A Collapse of Antarctic Ice Shelves - A Multidecadal Satellite Perspective The Meteorology and Atmospheric Science Colloquia presents Shujie Wang and her presentation on "A Collapse of Antarctic Ice Shelves - A Multidecadal Satellite Perspective."

    Shujie Wang, Penn State
    February 1, 2023
    3:30 - 4:30 p.m.
    112 Walker Building

    Abstract
    Rapid retreat of the Larsen A and B ice shelves has provided important clues about the ice shelf destabilization processes. The Larsen C Ice Shelf, the largest remaining ice shelf on the Antarctic Peninsula, may also be vulnerable to future collapse in a warming climate. Here, we utilize multisource satellite images collected over 1963–2020 to derive multidecadal time series of ice front, flow velocities, and critical rift features over Larsen C, with the aim of understanding the controls on its retreat. We complement these observations with modeling experiments using the Ice-sheet and Sea-level System Model to examine how front geometry conditions and mechanical weakening due to rifts affect ice shelf dynamics. Over the past six decades, Larsen C lost over 20% of its area, dominated by rift-induced tabular iceberg calving. The Bawden Ice Rise and Gipps Ice Rise are critical areas for rift formation, through their impact on the longitudinal deviatoric stress field. Mechanical weakening around Gipps Ice Rise is found to be an important control on localized flow acceleration and the propagation of two rifts that caused a major calving event in 2017. Capturing the time-varying effects of rifts on ice rigidity in ice shelf models is...

    ---
    Event details:
    https://www.addevent.com/event/yl16034860



    112 Walker Building false MM/DD/YYYY 30 OPAQUE aUtmJhufKzqaJgCUumsK161293
    location_on

    112 Walker Building

    person

    Laifang Li, lfl5240@psu.edu