Dating Antarctic blue ice areas using a novel ice flow model

Aslak Grinsted; J Moore; V B Spikes; A Sinisalo

Dating Antarctic blue ice areas using a novel ice flow model

Aslak Grinsted, J Moore, V B Spikes, A Sinisalo

20 Citationer (Scopus)

Abstract

We present a new type of flow model suitable for Antarctic blue ice areas, with application to dating ice for paleoclimate purposes. The volume conserving model uses field data for surface velocities, mass balance and ice thickness along a flow line, with parameterized variation of ice rheology with depth to produce particle trajectories and isochrones. The model is tested on the contrasting Allan Hills Near Western Ice Field and the Scharffenbergbotnen blue ice fields in Antarctica by comparing predicted ages with ages inferred from meteorites and ¹⁴C data. During the glacial periods, ice surface velocities at the Allan Hills must have been 25% less, and accumulation rates 50% less than present day values in order to match meteorite ages. In contrast, Scharffenbergbotnen velocities have probably been fairly constant over time due to the atypical valley where it resides.

Originalsprog	Engelsk
Tidsskrift	Geophysical Research Letters
Vol/bind	30
Udgave nummer	19
ISSN	0094-8276
Status	Udgivet - 2003
Udgivet eksternt	Ja

Citationsformater

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abstract = "We present a new type of flow model suitable for Antarctic blue ice areas, with application to dating ice for paleoclimate purposes. The volume conserving model uses field data for surface velocities, mass balance and ice thickness along a flow line, with parameterized variation of ice rheology with depth to produce particle trajectories and isochrones. The model is tested on the contrasting Allan Hills Near Western Ice Field and the Scharffenbergbotnen blue ice fields in Antarctica by comparing predicted ages with ages inferred from meteorites and 14C data. During the glacial periods, ice surface velocities at the Allan Hills must have been 25% less, and accumulation rates 50% less than present day values in order to match meteorite ages. In contrast, Scharffenbergbotnen velocities have probably been fairly constant over time due to the atypical valley where it resides.",

author = "Aslak Grinsted and J Moore and Spikes, {V B} and A Sinisalo",

note = "Paper id:: 10.1029/2003GL017957",

year = "2003",

language = "English",

volume = "30",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "Wiley-Blackwell",

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TY - JOUR

T1 - Dating Antarctic blue ice areas using a novel ice flow model

AU - Grinsted, Aslak

AU - Moore, J

AU - Spikes, V B

AU - Sinisalo, A

N1 - Paper id:: 10.1029/2003GL017957

PY - 2003

Y1 - 2003

N2 - We present a new type of flow model suitable for Antarctic blue ice areas, with application to dating ice for paleoclimate purposes. The volume conserving model uses field data for surface velocities, mass balance and ice thickness along a flow line, with parameterized variation of ice rheology with depth to produce particle trajectories and isochrones. The model is tested on the contrasting Allan Hills Near Western Ice Field and the Scharffenbergbotnen blue ice fields in Antarctica by comparing predicted ages with ages inferred from meteorites and 14C data. During the glacial periods, ice surface velocities at the Allan Hills must have been 25% less, and accumulation rates 50% less than present day values in order to match meteorite ages. In contrast, Scharffenbergbotnen velocities have probably been fairly constant over time due to the atypical valley where it resides.

AB - We present a new type of flow model suitable for Antarctic blue ice areas, with application to dating ice for paleoclimate purposes. The volume conserving model uses field data for surface velocities, mass balance and ice thickness along a flow line, with parameterized variation of ice rheology with depth to produce particle trajectories and isochrones. The model is tested on the contrasting Allan Hills Near Western Ice Field and the Scharffenbergbotnen blue ice fields in Antarctica by comparing predicted ages with ages inferred from meteorites and 14C data. During the glacial periods, ice surface velocities at the Allan Hills must have been 25% less, and accumulation rates 50% less than present day values in order to match meteorite ages. In contrast, Scharffenbergbotnen velocities have probably been fairly constant over time due to the atypical valley where it resides.

M3 - Journal article

SN - 0094-8276

VL - 30

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 19

ER -

Dating Antarctic blue ice areas using a novel ice flow model

Abstract

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Citationsformater