Airborne 3D basal DEM and ice thickness map of Pine Island Glacier

Blake, William; Shi, Lijian; Meisel, Joshua; Allen, Christopher T.; Gogineni, Prasad

doi:10.1109/igarss.2010.5653924

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…(a) PIG surface (red) (2002 ATM survey) and bed elevations (brown) [ Blake et al , 2010], and 1996 ice velocities (green) [ Rignot , 1998]. Distance is from the 2002 grounding line, where the glacier became afloat to form an ice shelf.…”

Section: Pine Island Glacier (Pig)mentioning

confidence: 99%

“…The grounding line on each glacier is retreating, reducing the drag between the glacier and its bed, and the PIG ice shelf is thinning by several meters each year, reducing drag between the ice shelf and its sides. Moreover, the partially-grounded ice rumples shown in [Blake et al, 2010], and 1996 ice velocities (green) [Rignot, 1998] [Rignot, 2008;Joughin et al, 2010]. Location of PIG is shown on inset map of Antarctica.…”

Section: Glacier Acceleration After Ice-shelf Breakupmentioning

confidence: 99%

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Accelerating ice loss from the fastest Greenland and Antarctic glaciers

Thomas

Frederick

et al. 2011

Geophys. Res. Lett.

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[1] Ice discharge from the fastest glaciers draining the Greenland and Antarctic ice sheets -Jakobshavn Isbrae (JI) and Pine Island Glacier (PIG)-continues to increase, and is now more than double that needed to balance snowfall in their catchment basins. Velocity increase probably resulted from decreased buttressing from thinning (and, for JI, breakup) of their floating ice tongues, and from reduced basal drag as grounding lines on both glaciers retreat. JI flows directly into the ocean as it becomes afloat, and here creep rates are proportional to the cube of bed depth. Rapid thinning of the PIG ice shelf increases the likelihood of its breakup, and subsequent rapid increase in discharge velocity. Results from a simple model indicate that JI velocities should almost double to >20 km a −1 by 2015, with velocities on PIG increasing to >10 km a −1 after breakup of its ice shelf. These high velocities would probably be sustained over many decades as the glaciers retreat within their long, very deep troughs. Resulting sea-level rise would average about 1.5 mm a −1 .

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Section: Pine Island Glacier (Pig)mentioning

confidence: 99%

Section: Glacier Acceleration After Ice-shelf Breakupmentioning

confidence: 99%

Accelerating ice loss from the fastest Greenland and Antarctic glaciers

Thomas

Frederick

et al. 2011

Geophys. Res. Lett.

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“…The MCoRDS/I is an improved version of a previous CReSIS Very High Frequency (VHF) Multichannel Radar Depth Sounder [4]. The radar data collected with the MCoRDS/I during the OIB low-altitude missions have been used to produce a 3-D basal digital elevation model and ice thickness map of Pine Island Glacier [5].…”

Section: Introductionmentioning

confidence: 99%

High-Altitude Radar Measurements of Ice Thickness Over the Antarctic and Greenland Ice Sheets as a Part of Operation IceBridge

Paden

Leuschen

et al. 2013

IEEE Trans. Geosci. Remote Sensing

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The National Aeronautics and Space Administration (NASA) initiated a program called Operation IceBridge for monitoring critical parts of Greenland and Antarctica with airborne LIDARs until ICESat-II is launched in 2016. We have been operating radar instrumentation on the NASA DC-8 and P-3 aircraft used for LIDAR measurements over Antarctica and Greenland, respectively. The radar package on both aircraft includes a radar depth sounder/imager operating at the center frequency of 195 MHz. During high-altitude missions flown to perform surface-elevation measurements, we also collected radar depth sounder data. We obtained good ice thickness information and mapped internal layers for both thicker and thinner ice. We successfully sounded 3.2-km-thick low-loss ice with a smooth surface and also sounded about 1-km or less thick shallow ice with a moderately rough surface. The successful sounding required processing of data with an algorithm to obtain 56-dB or lower range sidelobes and array processing with a minimum variance distortionless response algorithm to reduce cross-track surface clutter. In this paper, we provide a brief description of the radar system, discuss range-sidelobe reduction and array processing algorithms, and provide sample results to demonstrate the successful sounding of the ice bottom interface from high altitudes over the Antarctic and Greenland ice sheets.Index Terms-High-altitude ice sheet measurements, ice surface clutter reduction, multichannel airborne radar.

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“…This data is available on the CReSIS website for the general public at www.cresis.ku.edu. Further processing is being performed on the entire data set, which will improve clarity and will fill in certain gaps that currently exist [6].…”

Section: Data Processingmentioning

confidence: 99%

Multichannel Coherent Radar Depth Sounder for NASA Operation Ice Bridge

Shi

Allen

Ledford

et al. 2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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The Multichannel Coherent Radar Depth Sounder (MCoRDS) system was developed by the Center for Remote Sensing of Ice Sheets (CReSIS) to map the thickness of ice sheets. This radar system was used in Antarctica as one of the primary sensors for NASA's Operation Ice Bridge (OIB) during the fall of 2009. Compared to its predecessors, MCoRDS features several new capabilities which enabled it to successfully capture ice thickness measurements over multiple glaciers on an aerial platform. This paper will focus on the capabilities of MCoRDS and also provide a sample of the processed radar results.

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Airborne 3D basal DEM and ice thickness map of Pine Island Glacier

Cited by 4 publications

References 6 publications

Accelerating ice loss from the fastest Greenland and Antarctic glaciers

Accelerating ice loss from the fastest Greenland and Antarctic glaciers

High-Altitude Radar Measurements of Ice Thickness Over the Antarctic and Greenland Ice Sheets as a Part of Operation IceBridge

Multichannel Coherent Radar Depth Sounder for NASA Operation Ice Bridge

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