Marion Leduc‐Leballeur
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CryoRad : An innovative Radiometric Mission for the study of the polar oceans and of the cryosphere Open
Observations from space are essential for more accurate description of the processes that dominate polar regions, but existing or planned space-borne sensors do not provide all the necessary geophysical parameters at the required spatial c…
Empirical classification of dry-wet snow status in Antarctica using multi-frequency passive microwave observations Open
Passive microwave satellite observations are commonly used to detect liquid water in the snowpack on the ice sheet. Typically, algorithms yield a binary dry-wet indicator limiting the information. Theoretical analyses have been demonstrate…
View article: A New Spaceborne Mission Concept for The Monitoring of the Cryosphere : CryoRAD
A New Spaceborne Mission Concept for The Monitoring of the Cryosphere : CryoRAD Open
Over the past decade, the availability of new low-frequency microwave spaceborne data has provided key parameters of the cryosphere and polar ocean that can be assimilated into Earth System Models, enhancing our understanding of fundamenta…
Extreme increases in snow grain size on the Antarctic Plateau from Satellite Observations and Ice Sheet-Atmosphere Interactions Open
Grain size variations impact the albedo and have consequence for the energy budget of the surface. The snow grain size in Antarctica follows a clear seasonal pattern: a summer increase and a winter decrease, which are conditioned by atmosp…
Estimating Geothermal Heat Flow in Ice-Covered Regions Using Bayesian Inversion and SMOS Satellite Data Open
Geothermal heat flow (GHF) plays a critical role in influencing ice sheet dynamics, making accurate estimation essential for understanding the thermal structure of the lithosphere. However, direct observations in ice-covered regions are sp…
View article: Assessing the usability of remotely sensed ice temperatures for ice sheet modelling
Assessing the usability of remotely sensed ice temperatures for ice sheet modelling Open
A primary objective of CryoRad, a candidate mission for ESA's Earth Explorer 12, is to provide ice sheet wide satellite-derived observations of englacial temperatures and basal thermal states. These parameters are critical for modeling ice…
Coupling Solid Earth and ice temperature models to estimate geothermal heat flow Open
Geothermal heat flow (GHF) is a key element of Solid Earth-cryosphere interactions. However, polar regions as Antarctica are only sparsely covered with heat flow determinations from boreholes, so one must rely on interpolation or regressio…
Extreme events of snow grain size increase in East Antarctica and their relationship with meteorological conditions Open
This study explores the seasonal variations in snow grain size on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large-scale atmo…
View article: Simulating 0.4–2.5 GHz Brightness Temperatures of the Ross Ice Shelf, Antarctica
Simulating 0.4–2.5 GHz Brightness Temperatures of the Ross Ice Shelf, Antarctica Open
Ice shelves are important parts of the cryosphere that influence ice sheet dynamics and mass loss. The internal temperatures of ice shelves are currently known only from a few borehole sites or from glaciological models. Microwave radiomet…
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica Open
Microwave brightness temperatures observed in Antarctica at 89 GHz from the advanced microwave sounding unit B (AMSU-B) point out an exceptional decrease of 57 K at Dome Fuji ( 77.31°S , 39.70°E ) during the 2019–2020 summer. The grain siz…
Statistically parameterizing and evaluating a positive degree-day model to estimate surface melt in Antarctica from 1979 to 2022 Open
Surface melting is one of the primary drivers of ice shelf collapse in Antarctica and is expected to increase in the future as the global climate continues to warm because there is a statistically significant positive relationship between …
Comment on tc-2023-61 Open
Abstract. This study explores the grain size seasonal variations on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large scale at…
Antarctic Ice Sheet paleo-constraint database Open
We present a database of observational constraints on past Antarctic Ice Sheet changes during the last glacial cycle intended to consolidate the observations that represent our understanding of past Antarctic changes and for state-space es…
Comment on tc-2023-61 Open
Abstract. This study explores the grain size seasonal variations on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large scale at…
Interpretation of CAROLS L-band measurements in the Gulf of Biscay Open
In order to validate and improve models used in the SMOS data processing for salinity retrieval, L-band airborne CAROLS campaigns have been conducted in the Gulf of Biscay. The radiometer (CAROLS) is mounted onboard the French research ATR…
Extremes of surface snow grains change in East Antarctica and their relationship with meteorological conditions Open
This study explores the grain size seasonal variations on the East Antarctic Plateau, where dry metamorphism occurs, by using microwave radiometer observations from 2000 to 2022. Local meteorological conditions and large scale atmospheric …
View article: Ice Sheet and Sea Ice Ultrawideband Microwave radiometric Airborne eXperiment (ISSIUMAX) in Antarctica: first results from Terra Nova Bay
Ice Sheet and Sea Ice Ultrawideband Microwave radiometric Airborne eXperiment (ISSIUMAX) in Antarctica: first results from Terra Nova Bay Open
An airborne microwave wide-band radiometer (500–2000 MHz) was operated for the first time in Antarctica to better understand the emission properties of sea ice, outlet glaciers and the interior ice sheet from Terra Nova Bay to Dome C. The …
Antarctic ice sheet paleo-constraint database Open
We present a database of observational constraints on past Antarctic ice sheet changes during the last glacial cycle intended to consolidate the observations that represent our understanding of past Antarctic changes, for state-space estim…
The sensitivity of satellite microwave observations to liquid water in the Antarctic snowpack Open
Surface melting on the Antarctic Ice Sheet has been monitored by satellite microwave radiometry for over 40 years. Despite this long perspective, our understanding of the microwave emission from wet snow is still limited, preventing the fu…
View article: A review of recent developments in low-frequency ultra-wideband microwave radiometry for studies of the cryosphere
A review of recent developments in low-frequency ultra-wideband microwave radiometry for studies of the cryosphere Open
Over the past decade, a series of airborne experiments in the Arctic and Antarctica explored microwave emission from sea ice and ice sheets at frequencies from 0.5 to 2 GHz. The experiments were motivated by the fact that lower frequencies…
Estimating surface melt in Antarctica from 1979 to 2022, using a statistically parameterized positive degree-day model Open
Surface melt is one of the primary drivers of ice shelf collapse in Antarctica. Surface melting is expected to increase in the future as the global climate continues to warm, because there is a statistically significant positive relationsh…
View article: Comment on tc-2022-59
Comment on tc-2022-59 Open
Abstract. An airborne microwave wide-band radiometer (500â2000âMHz) was operated for the first time in Antarctica to better understand the emission properties of sea ice, outlet glaciers and the interior ice sheet from Terra Nova Bay t…
View article: Comment on tc-2022-59
Comment on tc-2022-59 Open
Abstract. An airborne microwave wide-band radiometer (500â2000âMHz) was operated for the first time in Antarctica to better understand the emission properties of sea ice, outlet glaciers and the interior ice sheet from Terra Nova Bay t…
Airborne SnowSAR data at X and Ku bands over boreal forest, alpine and tundra snow cover Open
The European Space Agency SnowSAR instrument is a side-looking, dual-polarised (VV/VH), X/Ku band synthetic aperture radar (SAR), operable from various sizes of aircraft. Between 2010 and 2013, the instrument was deployed at several sites …
Comment on tc-2022-85 Open
Surface melting on the Antarctic Ice Sheet has been monitored by satellite microwave radiometery for over 40 years. Despite this long perspective, our understanding of the microwave emission from wet snow is still limited, preventing the f…
Comment on tc-2022-85 Open
Surface melting on the Antarctic Ice Sheet has been monitored by satellite microwave radiometery for over 40 years. Despite this long perspective, our understanding of the microwave emission from wet snow is still limited, preventing the f…
View article: Ice Sheet and Sea Ice Ultrawideband Microwave Airborne eXperiment (ISSIUMAX) in Antarctica: first results from Terra Nova Bay
Ice Sheet and Sea Ice Ultrawideband Microwave Airborne eXperiment (ISSIUMAX) in Antarctica: first results from Terra Nova Bay Open
An airborne microwave wide-band radiometer (500–2000 MHz) was operated for the first time in Antarctica to better understand the emission properties of sea ice, outlet glaciers and the interior ice sheet from Terra Nova Bay to Dome C. The …
The sensitivity of satellite microwave observations to liquid water in the Antarctic snowpack Open
Surface melting on the Antarctic Ice Sheet has been monitored by satellite microwave radiometery for over 40 years. Despite this long perspective, our understanding of the microwave emission from wet snow is still limited, preventing the f…
Comment on essd-2021-239 Open
Abstract. The European Space Agency SnowSAR instrument is a side looking, dual polarized (VV/VH), X/Ku band synthetic aperture radar (SAR), operable from a small aircraft. Between 2010 and 2013, the instrument was deployed at several sites…