Airborne Radar for High-resolution Mapping of Internal Layers in Glacial Ice to Estimate Accumulation Rate
نویسندگان
چکیده
Motivation • Strong correlation between climate change and sea-level rise • Sea level rose by about 15 cm over the last century • IPCC projected sea-level to rise 5mm/yr. over the next 100 years • Potential impact – stronger storm surges in the coastal regions – coastal erosion – submerged islands – diminished fresh water supplies – loss of tourism • " Prediction of climate change is a critical technological challenge " – IEEE, 2002
منابع مشابه
An Airborne Radar System for High-Resolution Mapping of Internal Layers
Accumulation rate is a key variable in assessing the mass balance of polar ice sheets. An improved knowledge of the mass balance of polar ice sheets is needed to determine their role in current and future sea level rise. Existing accumulation maps, derived from sparsely distributed ice cores and pits, contain accumulation rate errors as large as 20% in certain areas. Remote sensing methods to c...
متن کاملHigh-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet
The global sea level rise has been attributed to the melting of mountain glaciers among other causes. The mass balance of the glacial ice plays an important role in the rise of the Earth’s sea level. A key variable in assessing the mass balance of an ice sheet is accumulation rate, which is currently determined from ice cores and pits. Accumulation data are sparse, and there are large uncertain...
متن کاملA Wideband Radar for Mapping Internal Layers in the Polar Icesheets for Estimating Accumulation Rate
Determination of the mass balance of the polar ice sheets requires information on the accumulation rate. Remote sensing methods to determine the accumulation rate are essential in reducing the uncertainty associated with interpolating in situ measurements that are obtained from ice cores and pits. This is essential to reducing the 20% of uncertainty in current accumulation rate maps. Using data...
متن کاملFine Resolution Radar for Near-Surface Layer Mapping
It is estimated that sea levels have risen 4 to 8 m in the last century. Currently, there is much uncertainty regarding the contribution to this rise from melting ice sheets and glaciers. The key parameter in quantifying the ice sheets contribution is assessing their mass balance. The accumulation rate is a key parameter in computing the mass balance. Remote sensing techniques are required to r...
متن کاملHigh-resolution study of layering within the percolation and soaked facies of the Greenland ice sheet
Within the percolation and soaked facies of the Greenland ice sheet, the relationship between radar-derived internal reflection horizons and the layered structure of the firn column is unclear. We conducted two small-scale ground-penetrating radar (GPR) surveys in conjunction with 10m firn cores that we collected within the percolation and soaked facies of the Greenland ice sheet. The two surve...
متن کامل