First order projections of frontal ablation at Alaska tidewater glaciers

Robert McNabb, Regine Hock, A Cody Beedlow

Research output: Contribution to conferenceAbstract

Abstract

Frontal ablation (the sum of mass loss by calving and submarine melt) is an important yet poorly constrained component of tidewater glacier mass balance. Because of the complicated nature of both calving and ice-ocean interations, there are relatively few studies of frontal ablation on a regional scale, and no projections of frontal ablation on a regional scale. We compare two methods for constraining projections of frontal ablation from 50 Alaska tidewater glaciers. The first method is based on conservation of mass, and estimates frontal ablation using surface mass balance and glacier length. This method has already been used to estimate rates of frontal ablation from 50 Alaska tidewater glaciers, over the period 1950-2009; we estimate that frontal ablation accounts for more than half of the net mass loss for all Alaska tidewater glaciers over this time period. The second method uses a cross-sectional area of the glacier bed, along with different scenarios for hypothetical changes in glacier velocities, to estimate rates of frontal ablation from 50 Alaska tidewater glaciers. We use these two methods, along with projected surface mass balances, to present a range of future losses through frontal ablation from all 50 Alaska tidewater glaciers until 2050.
Original languageEnglish
Publication statusPublished - 2012
EventAmerican Geophysical Union Fall Meeting - San Francisco, United States
Duration: 3 Dec 20127 Dec 2012

Conference

ConferenceAmerican Geophysical Union Fall Meeting
CountryUnited States
CitySan Francisco
Period3/12/127/12/12

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tidewater glacier
ablation
glacier
mass balance
glacier mass balance
method
melt
ice

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McNabb, R., Hock, R., & Beedlow, A. C. (2012). First order projections of frontal ablation at Alaska tidewater glaciers. Abstract from American Geophysical Union Fall Meeting, San Francisco, United States.
McNabb, Robert ; Hock, Regine ; Beedlow, A Cody. / First order projections of frontal ablation at Alaska tidewater glaciers. Abstract from American Geophysical Union Fall Meeting, San Francisco, United States.
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title = "First order projections of frontal ablation at Alaska tidewater glaciers",
abstract = "Frontal ablation (the sum of mass loss by calving and submarine melt) is an important yet poorly constrained component of tidewater glacier mass balance. Because of the complicated nature of both calving and ice-ocean interations, there are relatively few studies of frontal ablation on a regional scale, and no projections of frontal ablation on a regional scale. We compare two methods for constraining projections of frontal ablation from 50 Alaska tidewater glaciers. The first method is based on conservation of mass, and estimates frontal ablation using surface mass balance and glacier length. This method has already been used to estimate rates of frontal ablation from 50 Alaska tidewater glaciers, over the period 1950-2009; we estimate that frontal ablation accounts for more than half of the net mass loss for all Alaska tidewater glaciers over this time period. The second method uses a cross-sectional area of the glacier bed, along with different scenarios for hypothetical changes in glacier velocities, to estimate rates of frontal ablation from 50 Alaska tidewater glaciers. We use these two methods, along with projected surface mass balances, to present a range of future losses through frontal ablation from all 50 Alaska tidewater glaciers until 2050.",
author = "Robert McNabb and Regine Hock and Beedlow, {A Cody}",
year = "2012",
language = "English",
note = "American Geophysical Union Fall Meeting ; Conference date: 03-12-2012 Through 07-12-2012",

}

McNabb, R, Hock, R & Beedlow, AC 2012, 'First order projections of frontal ablation at Alaska tidewater glaciers', American Geophysical Union Fall Meeting, San Francisco, United States, 3/12/12 - 7/12/12.

First order projections of frontal ablation at Alaska tidewater glaciers. / McNabb, Robert; Hock, Regine; Beedlow, A Cody.

2012. Abstract from American Geophysical Union Fall Meeting, San Francisco, United States.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - First order projections of frontal ablation at Alaska tidewater glaciers

AU - McNabb, Robert

AU - Hock, Regine

AU - Beedlow, A Cody

PY - 2012

Y1 - 2012

N2 - Frontal ablation (the sum of mass loss by calving and submarine melt) is an important yet poorly constrained component of tidewater glacier mass balance. Because of the complicated nature of both calving and ice-ocean interations, there are relatively few studies of frontal ablation on a regional scale, and no projections of frontal ablation on a regional scale. We compare two methods for constraining projections of frontal ablation from 50 Alaska tidewater glaciers. The first method is based on conservation of mass, and estimates frontal ablation using surface mass balance and glacier length. This method has already been used to estimate rates of frontal ablation from 50 Alaska tidewater glaciers, over the period 1950-2009; we estimate that frontal ablation accounts for more than half of the net mass loss for all Alaska tidewater glaciers over this time period. The second method uses a cross-sectional area of the glacier bed, along with different scenarios for hypothetical changes in glacier velocities, to estimate rates of frontal ablation from 50 Alaska tidewater glaciers. We use these two methods, along with projected surface mass balances, to present a range of future losses through frontal ablation from all 50 Alaska tidewater glaciers until 2050.

AB - Frontal ablation (the sum of mass loss by calving and submarine melt) is an important yet poorly constrained component of tidewater glacier mass balance. Because of the complicated nature of both calving and ice-ocean interations, there are relatively few studies of frontal ablation on a regional scale, and no projections of frontal ablation on a regional scale. We compare two methods for constraining projections of frontal ablation from 50 Alaska tidewater glaciers. The first method is based on conservation of mass, and estimates frontal ablation using surface mass balance and glacier length. This method has already been used to estimate rates of frontal ablation from 50 Alaska tidewater glaciers, over the period 1950-2009; we estimate that frontal ablation accounts for more than half of the net mass loss for all Alaska tidewater glaciers over this time period. The second method uses a cross-sectional area of the glacier bed, along with different scenarios for hypothetical changes in glacier velocities, to estimate rates of frontal ablation from 50 Alaska tidewater glaciers. We use these two methods, along with projected surface mass balances, to present a range of future losses through frontal ablation from all 50 Alaska tidewater glaciers until 2050.

UR - https://ui.adsabs.harvard.edu/abs/2012AGUFM.C53B0838M/abstract

M3 - Abstract

ER -

McNabb R, Hock R, Beedlow AC. First order projections of frontal ablation at Alaska tidewater glaciers. 2012. Abstract from American Geophysical Union Fall Meeting, San Francisco, United States.