Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland: C21C-04

Shfaqat Abbas Khan; Kurt H. Kjær; Niels Jákup Korsgaard; John M Wahr; Ian R Joughin; Jonathan L Bamber; Beata M Csatho; Michiel R van den Broeke; Leigh A Stearns; Karina Nielsen; Gregory S Babonis; Gordon S Hamilton; Ruud TWL Hurkmans; Lars H Timm

Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland: C21C-04

Shfaqat Abbas Khan, Kurt H. Kjær, Niels Jákup Korsgaard, John M Wahr, Ian R Joughin, Jonathan L Bamber, Beata M Csatho, Michiel R van den Broeke, Leigh A Stearns, Karina Nielsen, Gregory S Babonis, Gordon S Hamilton, Ruud TWL Hurkmans, Lars H Timm

Abstract

Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3.

Original language	English
Publication date	Dec 2011
Number of pages	1
Publication status	Published - Dec 2011
Event	American Geophysical Union Fall Meeting 2011 - San Francisco, United States Duration: 5 Dec 2011 → 9 Dec 2011

Conference

Conference	American Geophysical Union Fall Meeting 2011
Country/Territory	United States
City	San Francisco
Period	05/12/2011 → 09/12/2011

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Khan, S. A., Kjær, K. H., Korsgaard, N. J., Wahr, J. M., Joughin, I. R., Bamber, J. L., Csatho, B. M., Broeke, M. R. V. D., Stearns, L. A., Nielsen, K., Babonis, G. S., Hamilton, G. S., Hurkmans, R. TWL., & Timm, L. H. (2011). Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland: C21C-04. Poster session presented at American Geophysical Union Fall Meeting 2011, San Francisco, United States.

Khan, SA, Kjær, KH, Korsgaard, NJ, Wahr, JM, Joughin, IR, Bamber, JL, Csatho, BM, Broeke, MRVD, Stearns, LA, Nielsen, K, Babonis, GS, Hamilton, GS, Hurkmans, RTWL & Timm, LH 2011, 'Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland: C21C-04', American Geophysical Union Fall Meeting 2011, San Francisco, United States, 05/12/2011 - 09/12/2011.

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title = "Rapid dynamic thinning events during 1985-2010 on Upernavik Isstr{\o}m, West Greenland: C21C-04",

abstract = "Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstr{\o}m (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3.",

author = "Khan, {Shfaqat Abbas} and Kj{\ae}r, {Kurt H.} and Korsgaard, {Niels J{\'a}kup} and Wahr, {John M} and Joughin, {Ian R} and Bamber, {Jonathan L} and Csatho, {Beata M} and Broeke, {Michiel R van den} and Stearns, {Leigh A} and Karina Nielsen and Babonis, {Gregory S} and Hamilton, {Gordon S} and Hurkmans, {Ruud TWL} and Timm, {Lars H}",

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month = dec,

language = "English",

note = "American Geophysical Union Fall Meeting 2011 ; Conference date: 05-12-2011 Through 09-12-2011",

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T1 - Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland

T2 - American Geophysical Union Fall Meeting 2011

AU - Khan, Shfaqat Abbas

AU - Kjær, Kurt H.

AU - Korsgaard, Niels Jákup

AU - Wahr, John M

AU - Joughin, Ian R

AU - Bamber, Jonathan L

AU - Csatho, Beata M

AU - Broeke, Michiel R van den

AU - Stearns, Leigh A

AU - Nielsen, Karina

AU - Babonis, Gregory S

AU - Hamilton, Gordon S

AU - Hurkmans, Ruud TWL

AU - Timm, Lars H

PY - 2011/12

Y1 - 2011/12

N2 - Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3.

AB - Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3.

M3 - Poster

Y2 - 5 December 2011 through 9 December 2011

ER -

Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland: C21C-04

Abstract

Conference

UN SDGs

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