000196411 001__ 196411
000196411 003__ CZ-ZdVUG
000196411 005__ 20220607110922.0
000196411 041__ $$aeng
000196411 040__ $$aABC039$$bcze
000196411 1001_ $$aKostelecký, Jakub
000196411 24510 $$aGnss Profile from the Greenland Korth Expeditions in the Context of Satellite Data
000196411 300__ $$a18 stran
000196411 5203_ $$aOver the last two decades, a small group of researchers repeatedly crossed the Greenland interior skiing along a 700-km long route from east to west, acquiring precise GNSS measurements at exactly the same locations. Four such elevation profiles of the ice sheet measured in 2002, 2006, 2010 and 2015 were differenced and used to analyze the surface elevation change. Our goal is to compare such locally measured GNSS data with independent satellite observations. First, we show an agreement in the rate of elevation change between the GNSS data and satellite radar altimetry (ERS, Envisat, CryoSat-2). Both datasets agree well (2002–2015), and both correctly display local features such as an elevation increase in the central part of the ice sheet and a sharp gradual decline in the surface heights above Jakobshavn Glacier. Second, we processed satellite gravimetry data (GRACE) in order for them to be comparable with local GNSS measurements. The agreement is demonstrated by a time series at one of the measurement sites. Finally, we provide our own satellite gravimetry (GRACE, GRACE-FO, Swarm) estimate of the Greenland mass balance: first a mild decrease (2002–2007: −210 ± 29 Gt/yr), then an accelerated mass loss (2007–2012: −335 ± 29 Gt/yr), which was noticeably reduced afterwards (2012–2017: −178 ± 72 Gt/yr), and nowadays it seems to increase again (2018–2019: −278 ± 67 Gt/yr).
000196411 655_4 $$ačlánek v časopise
000196411 7001_ $$aBezděk, Aleš
000196411 7001_ $$aHitziger, Thomas
000196411 7001_ $$aSebera, Josef
000196411 7730_ $$92021$$dBasel:MDPI AG,2021.$$g11. (3), 18 s.$$tApplied Sciences$$x2076-3417
000196411 8564_ $$uhttps://www.mdpi.com/2076-3417/11/3/1115
000196411 85642 $$ahttps://www.isvavai.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F21%3AN0000010%21RIV22-MSM-00025615
000196411 910__ $$aABC039
000196411 980__ $$aclanky_vugtk
000196411 985__ $$akosteleckyjakub
000196411 985__ $$ariv
000196411 985__ $$autvar24