Blar i Geophysical Institute på forfatter "Zygmuntowska, Marta"
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Analysis of CryoSat’s radar altimeter waveforms over different Arctic sea ice regimes
Zygmuntowska, Marta; Khvorostovsky, Kirill (Journal article, 2014-06-11)Satellite altimetry has been used to derive information about sea ice thickness in the Arctic already for several decades. As part of the algorithms applied the shape of the radar signal is used to identify leads, the open ... -
Arctic sea ice altimetry - advances and current uncertainties
Zygmuntowska, Marta (Doctoral thesis, 2014-06-11)One of the most prominent features of global climate change is the reduction in Arctic sea ice thickness. The main tool to derive sea ice thickness on an Arctic wide scale is altimetry from satellites, yet current estimates ... -
Uncertainties in Arctic sea ice thickness and volume: new estimates and implications for trends
Zygmuntowska, Marta; Rampal, Pierre; Ivanova, Natalia; Smedsrud, Lars Henrik (Peer reviewed; Journal article, 2014-04-22)Sea ice volume has decreased in the last decades, evoked by changes in sea ice area and thickness. Estimates of sea ice area and thickness rely on a number of geophysical parameters which introduce large uncertainties. To ... -
Waveform classification of airborne synthetic aperture radar altimeter over Arctic sea ice
Zygmuntowska, Marta; Khvorostovsky, Kirill; Helm, Veith; Sandven, Stein (Peer reviewed; Journal article, 2013-08-19)Sea ice thickness is one of the most sensitive variables in the Arctic climate system. In order to quantify changes in sea ice thickness, CryoSat-2 was launched in 2010 carrying a Ku-band radar altimeter (SIRAL) designed ...