GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data
Over 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...
Published in: | Applied Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2021
|
Subjects: | |
Online Access: | https://doi.org/10.3390/app11031115 https://doaj.org/article/89d4c737a2ab4388af067b4c1b765ace |
id |
ftdoajarticles:oai:doaj.org/article:89d4c737a2ab4388af067b4c1b765ace |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:89d4c737a2ab4388af067b4c1b765ace 2024-01-07T09:43:24+01:00 GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data Aleš Bezděk Jakub Kostelecký Josef Sebera Thomas Hitziger 2021-01-01T00:00:00Z https://doi.org/10.3390/app11031115 https://doaj.org/article/89d4c737a2ab4388af067b4c1b765ace EN eng MDPI AG https://www.mdpi.com/2076-3417/11/3/1115 https://doaj.org/toc/2076-3417 doi:10.3390/app11031115 2076-3417 https://doaj.org/article/89d4c737a2ab4388af067b4c1b765ace Applied Sciences, Vol 11, Iss 3, p 1115 (2021) Greenland ice sheet GNSS gravimetry altimetry GRACE Swarm Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 article 2021 ftdoajarticles https://doi.org/10.3390/app11031115 2023-12-10T01:43:09Z Over 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). Article in Journal/Newspaper glacier Greenland Ice Sheet Jakobshavn Directory of Open Access Journals: DOAJ Articles Greenland Applied Sciences 11 3 1115 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Greenland ice sheet GNSS gravimetry altimetry GRACE Swarm Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Greenland ice sheet GNSS gravimetry altimetry GRACE Swarm Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Aleš Bezděk Jakub Kostelecký Josef Sebera Thomas Hitziger GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
topic_facet |
Greenland ice sheet GNSS gravimetry altimetry GRACE Swarm Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
description |
Over 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). |
format |
Article in Journal/Newspaper |
author |
Aleš Bezděk Jakub Kostelecký Josef Sebera Thomas Hitziger |
author_facet |
Aleš Bezděk Jakub Kostelecký Josef Sebera Thomas Hitziger |
author_sort |
Aleš Bezděk |
title |
GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
title_short |
GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
title_full |
GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
title_fullStr |
GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
title_full_unstemmed |
GNSS Profile from the Greenland Korth Expeditions in the Context of Satellite Data |
title_sort |
gnss profile from the greenland korth expeditions in the context of satellite data |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/app11031115 https://doaj.org/article/89d4c737a2ab4388af067b4c1b765ace |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet Jakobshavn |
genre_facet |
glacier Greenland Ice Sheet Jakobshavn |
op_source |
Applied Sciences, Vol 11, Iss 3, p 1115 (2021) |
op_relation |
https://www.mdpi.com/2076-3417/11/3/1115 https://doaj.org/toc/2076-3417 doi:10.3390/app11031115 2076-3417 https://doaj.org/article/89d4c737a2ab4388af067b4c1b765ace |
op_doi |
https://doi.org/10.3390/app11031115 |
container_title |
Applied Sciences |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1115 |
_version_ |
1787424655472066560 |