Monthly solutions of ice sheet mass balance at basin scale – and their associated uncertainties

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Abstract

There are still discrepancies in published ice sheet mass balance results, even between ones based on the same data sets. It can be difficult to conclude from where the discrepancies arise, and it is therefore important to cross calibrate methods, data and models in order to determine the uncertainty associated with these. We present mass change time series at basin scale for both Greenland and Antarctica, derived from GRACE data. We use two independent methods, several different data sets to derive mass changes associated with appropriate
error bars. Then for each basin we show the GIA correction on trends with its uncertainties. The first method applied is based on a mass inversion, while the second one uses integration over a representation given in water equivalent. We find good agreement between the resulting mass changes based on the two independent methods, especially in the behaviour of time series.
We compare our GRACE derived regional estimates with independent mass change results based on altimetry data from NASA’s Ice Cloud and land Elevation Satellite.
Original languageEnglish
JournalGeophysical Research Abstracts
Volume14
Pages (from-to)EGU2012-13282
Number of pages1
ISSN1607-7962
Publication statusPublished - 2012
EventEuropean Geosciences Union General Assembly 2012 - Vienna, Austria
Duration: 22 Apr 201227 Apr 2012
Conference number: 9
http://www.egu2012.eu/home.html

Conference

ConferenceEuropean Geosciences Union General Assembly 2012
Number9
CountryAustria
CityVienna
Period22/04/201227/04/2012
Internet address

Cite this

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title = "Monthly solutions of ice sheet mass balance at basin scale – and their associated uncertainties",
abstract = "There are still discrepancies in published ice sheet mass balance results, even between ones based on the same data sets. It can be difficult to conclude from where the discrepancies arise, and it is therefore important to cross calibrate methods, data and models in order to determine the uncertainty associated with these. We present mass change time series at basin scale for both Greenland and Antarctica, derived from GRACE data. We use two independent methods, several different data sets to derive mass changes associated with appropriateerror bars. Then for each basin we show the GIA correction on trends with its uncertainties. The first method applied is based on a mass inversion, while the second one uses integration over a representation given in water equivalent. We find good agreement between the resulting mass changes based on the two independent methods, especially in the behaviour of time series.We compare our GRACE derived regional estimates with independent mass change results based on altimetry data from NASA’s Ice Cloud and land Elevation Satellite.",
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pages = "EGU2012--13282",
journal = "Geophysical Research Abstracts",
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Monthly solutions of ice sheet mass balance at basin scale – and their associated uncertainties. / Sørensen, Louise Sandberg; Barletta, Valentina Roberta; Forsberg, René.

In: Geophysical Research Abstracts, Vol. 14, 2012, p. EGU2012-13282.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

TY - ABST

T1 - Monthly solutions of ice sheet mass balance at basin scale – and their associated uncertainties

AU - Sørensen, Louise Sandberg

AU - Barletta, Valentina Roberta

AU - Forsberg, René

PY - 2012

Y1 - 2012

N2 - There are still discrepancies in published ice sheet mass balance results, even between ones based on the same data sets. It can be difficult to conclude from where the discrepancies arise, and it is therefore important to cross calibrate methods, data and models in order to determine the uncertainty associated with these. We present mass change time series at basin scale for both Greenland and Antarctica, derived from GRACE data. We use two independent methods, several different data sets to derive mass changes associated with appropriateerror bars. Then for each basin we show the GIA correction on trends with its uncertainties. The first method applied is based on a mass inversion, while the second one uses integration over a representation given in water equivalent. We find good agreement between the resulting mass changes based on the two independent methods, especially in the behaviour of time series.We compare our GRACE derived regional estimates with independent mass change results based on altimetry data from NASA’s Ice Cloud and land Elevation Satellite.

AB - There are still discrepancies in published ice sheet mass balance results, even between ones based on the same data sets. It can be difficult to conclude from where the discrepancies arise, and it is therefore important to cross calibrate methods, data and models in order to determine the uncertainty associated with these. We present mass change time series at basin scale for both Greenland and Antarctica, derived from GRACE data. We use two independent methods, several different data sets to derive mass changes associated with appropriateerror bars. Then for each basin we show the GIA correction on trends with its uncertainties. The first method applied is based on a mass inversion, while the second one uses integration over a representation given in water equivalent. We find good agreement between the resulting mass changes based on the two independent methods, especially in the behaviour of time series.We compare our GRACE derived regional estimates with independent mass change results based on altimetry data from NASA’s Ice Cloud and land Elevation Satellite.

M3 - Conference abstract in journal

VL - 14

SP - EGU2012-13282

JO - Geophysical Research Abstracts

JF - Geophysical Research Abstracts

SN - 1607-7962

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