Surface topography of Dome Concordia (Antarctica) from kinematic interferential GPS and bedrock topography

Capra, Alessandro; Cefalo, Raffaela; Gandolfi, Stefano; Manzoni, G.; Tabacco, Ignazio; Vittuari, Luca

doi:10.3189/172756400781820606

Cited by 13 publications

(12 citation statements)

References 5 publications

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“…GPS surveys were integrated with previous surveys to create a detailed topographic map (Cefalo et al, 1996;Capra et al, 2000;Frezzotti et al, 2004a). The accuracy of the GPS elevation profile is about 10 cm; the interpolation process reduces accuracy to about 20 cm in the maps.…”

Section: Snow Accumulation and Isochronesmentioning

confidence: 99%

Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements

Urbini

Frezzotti

Gandolfi

et al. 2008

Global and Planetary Change

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Section: Snow Accumulation and Isochronesmentioning

confidence: 99%

Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements

Urbini

Frezzotti

Gandolfi

et al. 2008

Global and Planetary Change

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“…The Italian stations were located approximately along a 1200‐km‐long line at 75°S latitude. At one end of the line was Dome Concordia Station (DC), situated over a large flat dome on the Antarctic Plateau (the average slope is 0.004% [see Capra et al , 2000]). At the other end was Hells Gate Station (HG), situated on a flat area 5 × 10 km wide, on the ice shelf near the Ross Sea coast at Terra Nova Bay.…”

Section: Locations Instrumentation and Data Descriptionmentioning

confidence: 99%

Surface albedo measurements over Antarctic sites in summer

2004

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[1] Surface albedo data from several Antarctic sites were compared to determine spatial and temporal variability in albedo. The highest degree of variability was observed at Hells Gate Station on the Ross Sea coast. The temperature close to the melting point and the reduced katabatic winds during summer allowed a strong metamorphism of the snow. At Neumayer, a coastal station by the Weddell Sea, snowfall and drifting snow were more frequent, and the surface albedo was constantly high. The albedo increased by an average of 0.07 from clear days to days with snowfall and overcast sky. Surprisingly, the hourly variation in albedo at Hells Gate Station showed a trend similar to the one observed at Neumayer Station and at Dome Concordia Station on the high plateau, when only those days with fresh snow at the surface were considered. The albedo steadily decreased during the day for solar zenith angles less than 80°. Snow metamorphism, sublimation during the day, and refreezing and/or crystal formation/precipitation during the night can explain the observed trend. To represent the daily trend in albedo over ice and fresh snow, we propose two parameterizations, which can be easily applied over other Arctic and Antarctic sites in summer. Small-and large-scale surface roughness elements can result in distortion in the measured albedo. The data at Reeves Névé Station show the effect produced on the albedo by changing slightly the sampling area immediately over a sastruga.

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“…The precise bedrock topography has been reconstructed at Dome C in Antarctica [3]. The knowledge of the topography of this region was fundamental in choosing the optimal location for deep icecore drilling at Dome C [8]. In the same framework, the bedrock topography map shown in fig.…”

Section: Glacio Radar Resultsmentioning

confidence: 99%

Glacio RADAR system and results

Zirizzotti

Baskaradas

Bianchi

et al. 2008

2008 IEEE Radar Conference

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Since 1997 the Istituto Nazionale di Geofisica e Vulcanologia (INGV) in Italy has been involved in the development of the airborne RES system named Glacio RADAR, which is continuously upgraded. Radio Echo Sounding (RES) techniques are widely used in glaciological measurements. They are based on the use of radar systems, to obtain information concerning ice thickness of ice sheets and ice shelves, internal layering of glaciers, detection of inhomogeneities, exploration of subglacial lakes and identification of physical nature of subglacial interface. The Glacio RADAR is mounted on an aircraft and flies at an altitude around 300m above the ice surface during the survey. The first prototype operates in bistatic mode with separate transmit and receive one wire folded dipole installed beneath the aircraft wings. It works at 60 MHz with an envelope pulse width variable between 0.3 J,lS and 1 J,ls. The receiving window is 64 J,lS which implies a maximum penetration depth (range) in the ice of about 5.3 Ion. The horizontal sampling rate is 10 traces/s at a mean aircraft speed of about 70 mls. This would produce roughly 143 traces per kilometre (horizontal resolution of 1 trace every 7 m). The Navigation and geographical information is based on a on board GPS receiver giving longitude, latitude, altitude and time for the acquired radar trace. This radar was used in several

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Surface topography of Dome Concordia (Antarctica) from kinematic interferential GPS and bedrock topography

Cited by 13 publications

References 5 publications

Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements

Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements

Surface albedo measurements over Antarctic sites in summer

Glacio RADAR system and results

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