Combined GRACE and InSAR estimate of West Antarctic ice mass loss

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F10%3A10051617" target="_blank" >RIV/00216208:11320/10:10051617 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Combined GRACE and InSAR estimate of West Antarctic ice mass loss

Popis výsledku v původním jazyce

We estimate the mass balance of eight drainage basins in West Antarctica from the Gravity Recovery and Climate Experiment (GRACE) data (GFZ RL04, GSM Level 2) using a constrained inverse?gravimetric approach. We consider InSAR observations of ice surfacevelocity as an indication of mass change, assuming that large mass loss occurs in areas of fast glacier flow. From these mass distribution functions we construct forward models of the geoid height change and their spatial correlations for each drainagebasin. Then the difference between the GRACE data and the forward model is minimized by adjusting the total amount of mass change within each drainage basin. To overcome the ambiguity inherent in this inverse problem, we constrain its solution by including a priori estimates based on the InSAR mass?budget method. However, unconstrained (GRACE only) mass?change estimates can be recovered for three to four combined drainage basins.

Název v anglickém jazyce

Combined GRACE and InSAR estimate of West Antarctic ice mass loss

Popis výsledku anglicky

We estimate the mass balance of eight drainage basins in West Antarctica from the Gravity Recovery and Climate Experiment (GRACE) data (GFZ RL04, GSM Level 2) using a constrained inverse?gravimetric approach. We consider InSAR observations of ice surfacevelocity as an indication of mass change, assuming that large mass loss occurs in areas of fast glacier flow. From these mass distribution functions we construct forward models of the geoid height change and their spatial correlations for each drainagebasin. Then the difference between the GRACE data and the forward model is minimized by adjusting the total amount of mass change within each drainage basin. To overcome the ambiguity inherent in this inverse problem, we constrain its solution by including a priori estimates based on the InSAR mass?budget method. However, unconstrained (GRACE only) mass?change estimates can be recovered for three to four combined drainage basins.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research

ISSN

0148-0227

e-ISSN

—

Svazek periodika

115

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000283547000003

EID výsledku v databázi Scopus

—