Surface elevation. Aircraft GPS positioning. + Double travel time of radar wave in the air. Geophysical airborne campaign (UTJPL). Bedrock topography ...
How to make the most of a highr resolution DEM (SPIRIT) over an Antarctic outlet glacier, test case of the Astrolabe Glacier, Terre Adélie sector, East Antarctica
Emmanuel Le Meur1, Gaël Durand1, Etienne Berthier2, Basile de Fleurian1 and AnneSophie Drouet1 (4) L.G.G.E., ST Martin d’Hères, France (5) LEGOS, Toulouse France
wwwlgge.obs.ujfgrenoble.fr/axes/IPY/dacota
Ice fluxes within the icesheet
CONTEXT
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Equilibrium line Ablation zone Terrestrial margin
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Acc. zone *
* * Ice dome *
* *
Solid precipitation
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Accumulation zone *
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* Sea margin
*
CONTEXT
These fastflowing glaciers are speeding up !
Rignot and Kanagaratman, 2006
CONTEXT
Rignot et al., 2008
Large uncertainties in the overall mass balance of the EastAntarctic ice sheet (Wilkes sector)
2 ± 19 Gt /yr
Need for a more accurate computation of the total ice flux to the sea through outlet glaciers
CONTEXT
Airborne radar and Lidar campaign (ICECAP project)
CONTEXT
Focus on the WilkesTerre Adélie sector
CONTEXT
The Astrolabe glacier as a test zone 2 ± 19 Gt /yr
Rignot et al., 2008
Logistical facilities (near the french bases of Dumont d’Urville and Cap Prud’Homme
Cap Prud'Homme * * Dumont Durville
CONTEXT
Ice flow modelling and necessary field data Core of the model
Environnemental forcing
Model outputs Ep
Mass balance data
120 50 18 000
T
O
Tps
Sliding law
Sea level forcing
z
Grounding line dynamics
M
y
qY+dY
j
k
qx
v
H
Y+dY
x qY
i
x
qX+dX X+dX
y
SPIRIT DATA SETS Areas of interest for the SPIRIT project in the Southern Hemisphere.
TerreAdélie
J. Korona et al. / ISPRS Journal of Photogrammetry and Remote Sensing 64 (2009) 204212
SPIRIT DATA SETS
Astrolabe tongue
120 km
240 km
SPIRIT DATA SETS
A dynamically consistent body : the drainage basin
In this study, satellite optical images are used to assess the volumetric and dynamic changes of mountain glaciers. Original methodologies are developed to.
Apr 11, 2010 - modelling. Field work organised within the french polar expeditions IPEV. GPS beacons on the glacier and surrounding rock sites. Support from ...
Dec 5, 2013 - diversity, lost long ago in the modern lifestyle of ... as diverse as zebras, giraffes and bush pigs, the ... product flows so that waste and recycling ...
UK, US, Germany, Spain, Italy, France, Greece. >Vulnerability (2). ⢠Spain, France ... Global coverage (includes countries which cannot invest in airborne LiDAR ...
Jul 23, 2009 - area on the islands declined from 703 to 552 km2 between 1963 .... [13] Because of clouds in the images, complete glacier .... ice-free land before any glaciological application. .... In computing this curve, we did not take into.
regulates the lake level since it is the only river that flows out of ... Long, cold winters result in the complete freeze-up of the lake every year .... The use of microwave satellite observations represents a step ..... measured in K, which we call
Ice sheet mass balance from GRACE (2002-2009). -230 +/- 33 ... Global water cycle. Page 19. GRACE-based water storage trend 2002-2009 (km3/yr). Net trend ...
SATELLITES MONITORING. >>> Remerciement E. Berthier / M. Hambrey. > Extract of Spot Magazine / The international magazine of Spot Image / January 2008 ...
glacierized area except for a few glaciers that surged and advanced. ... wide flux gate (draining 130 km² of glacier) located just upstream of the area where the.
Available online 18 October 2008. Keywords: sea-level thermal expansion ice melt climate. From the IPCC 4th Assessment Report published in 2007, ocean ...
Rasmussen, L. A., Conway, H., Krimmel, R. M. and Hock, R.: Surface mass balance, .... Schneevoigt, N. J., Sund, M., Bogren, W., Kaab, A. and Weydahl, D. J.: ...
No better opportunity to establish framework for delivering a coordinated satellite legacy dataset. â All-time peak in terms of number of relevant polar-orbiters ...
April 2008) during the 2007-2008 campaign (December 2007 to April 2008); in yellow the footprints of the HRS images ..... E.B. was supported by the TOSCA.
One can merge the temporal and spatial queries. For example: âGreenland between January and December 2014â. The image below shows the result of the ...
the carbon cycle via the increased ecosystem respiration after melting [Goulden et al., 1998; ... JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112, D08108 .... ponents that capture much of the variance of the original data set [Hair et al., ...
Apr 25, 2006 - [2] Glacier mass balance, the change in mass of a glacier over a certain time ... air- or space-borne sensors is an accurate determination of.