R. Forsberg
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View article: Mass Change in Antarctica from 2002 to 2025 Using GRACE and GRACE-FO
Mass Change in Antarctica from 2002 to 2025 Using GRACE and GRACE-FO Open
Several Level-2 solutions for the GRACE(-FO) gravity field exist. We compare five of these solutions using a mascon inversion method to estimate gridded mass change in Antarctica from gravity field grids at orbit height. We compare the mas…
View article: Multi-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 2: Comparing airborne estimates with near-coincident CryoSat-2 and ICESat-2 (CRYO2ICE)
Multi-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 2: Comparing airborne estimates with near-coincident CryoSat-2 and ICESat-2 (CRYO2ICE) Open
For the first time, a comparison of altimetry-derived snow depth estimates between dual-frequency spaceborne and near-coincident multi-frequency airborne estimates is conducted using data from the recent under-flight of a CryoSat-2 and ICE…
View article: Multi-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 1: C∕S-, Ku-, and Ka-band airborne observations
Multi-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 1: C∕S-, Ku-, and Ka-band airborne observations Open
The recent alignment of CryoSat-2 to maximise orbital coincidence with the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) over the Southern Ocean and Antarctica in July 2022, known as the CryoSat-2 and ICESat-2 (CRYO2ICE) Resonance …
View article: Towards an improved understanding of the Antarctic coastal zone and its contribution to future global sea level
Towards an improved understanding of the Antarctic coastal zone and its contribution to future global sea level Open
View article: Airborne gravimetry with quantum technology: observations from Iceland and Greenland
Airborne gravimetry with quantum technology: observations from Iceland and Greenland Open
We report on the availability of data from an airborne gravity campaign in Iceland and Greenland conducted during June and July 2023. The dataset includes observations from a platform-stabilised gravimeter based on cold-atom quantum techno…
View article: Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica
Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica Open
We present Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of the Antarctic south of 60 °S. Bedmap3 incorporates and adds to all post-1950s datasets pr…
View article: Northernmost land in the world re-confirmed: Islands north of Greenland are icebergs
Northernmost land in the world re-confirmed: Islands north of Greenland are icebergs Open
Since the 1978 discovery of an islet “Oodaaq Island” north of Greenland, then considered to be the northernmost island in the world, multiple islets have been reported and apparently disappeared with regular intervals in the permanent sea …
View article: Echocardiographic Reference Values in Elderly with a Focus on Octogenarians and older
Echocardiographic Reference Values in Elderly with a Focus on Octogenarians and older Open
View article: Quasigeoid computation in the Nordic and Baltic region
Quasigeoid computation in the Nordic and Baltic region Open
The Nordic and Baltic Sea region is topographically varied, making gravity potential field modelling in the region a challenge. With new gravity data in and around the Baltic Sea, this study investigates improvements in the accuracy of qua…
View article: Sea ice pressure ridge statistics of the Barents Sea and Fram Strait from ICESat-2 laser altimetry observations during 2018-2022
Sea ice pressure ridge statistics of the Barents Sea and Fram Strait from ICESat-2 laser altimetry observations during 2018-2022 Open
The variability of ice thickness in the Barents Sea is poorly described, with irregular import events of deformed ice intrusions with strong spatial and temporal variability. In contrast, the primary export of sea ice from the Arctic Ocean…
View article: Airborne Gravimetry with Quantum Technology: Observations from Iceland and Greenland
Airborne Gravimetry with Quantum Technology: Observations from Iceland and Greenland Open
We report on the availability of data from an airborne gravity campaign in Iceland and Greenland, conducted during June and July 2023. The dataset includes observations from a platform stabilised gravimeter based on cold-atom quantum techn…
View article: Exploring microwave penetration into snow on Antarctic summer sea ice along CryoSat-2 and ICESat-2 (CRYO2ICE) orbit from multi-frequency air- and spaceborne altimetry
Exploring microwave penetration into snow on Antarctic summer sea ice along CryoSat-2 and ICESat-2 (CRYO2ICE) orbit from multi-frequency air- and spaceborne altimetry Open
The recent alignment of CryoSat-2 to maximise orbital coincidence with the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) over the Southern Ocean and Antarctica in July 2022, known as the CryoSat-2 and ICESat-2 (CRYO2ICE), provided …
View article: Arctic freeboard and snow depth from near-coincident CryoSat-2 and ICESat-2 (CRYO2ICE) observations: A first examination of winter sea ice during 2020-2022 (accepted)
Arctic freeboard and snow depth from near-coincident CryoSat-2 and ICESat-2 (CRYO2ICE) observations: A first examination of winter sea ice during 2020-2022 (accepted) Open
In the summer of 2020, ESA changed the orbit of CryoSat-2 to align periodically with NASA’s ICESat-2 mission, a campaign known as CRYO2ICE, which allows for near-coincident CryoSat-2 and ICESat-2 observations in space and time over the Arc…
View article: Potential of cold-atom airborne gravimetry to improve coastal gravity field and quasigeoid modelling
Potential of cold-atom airborne gravimetry to improve coastal gravity field and quasigeoid modelling Open
We investigate using the GIRAFE cold-atom gravimeter during an airborne gravity survey for improving gravity field and quasigeoid modelling. The study is conducted over the Bay of Biscay, France. Geoid/quasigeoid determination is usually a…
View article: Arctic Freeboard and Snow Depth From Near‐Coincident CryoSat‐2 and ICESat‐2 (CRYO2ICE) Observations: A First Examination of Winter Sea Ice During 2020–2022
Arctic Freeboard and Snow Depth From Near‐Coincident CryoSat‐2 and ICESat‐2 (CRYO2ICE) Observations: A First Examination of Winter Sea Ice During 2020–2022 Open
In the summer of 2020, ESA changed the orbit of CryoSat‐2 to align periodically with NASA's ICESat‐2 mission, a campaign known as CRYO2ICE, which allows for near‐coincident CryoSat‐2 and ICESat‐2 observations in space and time over the Arc…
View article: New aeromagnetic anomaly compilations help unveil regional-scale Antarctic subglacial geothermal heat flux heterogeneity
New aeromagnetic anomaly compilations help unveil regional-scale Antarctic subglacial geothermal heat flux heterogeneity Open
A new continent-wide aeromagnetic anomaly compilation for Antarctica, conformed at longer wavelengths with SWARM satellite magnetic data includes recent international datasets collected after the ADMAP 2.0 compilation analysed within the 3…
View article: CARIOQA-PMP quantum accelerometer simulation
CARIOQA-PMP quantum accelerometer simulation Open
Satellite gravimetry missions have been providing a global measure of Earth's mass transport for more than 20 years. This provides insights into the solid Earth, cryosphere, ocean dynamics and hydrology. Planned NASA and ESA missions will …
View article: Sub-Monthly Mass Change Signal in Greenland from GRACE-FO Laser Interferometry Data
Sub-Monthly Mass Change Signal in Greenland from GRACE-FO Laser Interferometry Data Open
GRACE and GRACE-FO have proven valuable for monitoring the health of ice sheets by showing seasonal mass changes along with the decadal trends of mass loss. Two years stand out in the Greenland ice sheet mass loss record with record melt: …
View article: Airborne Gravimetry with Quantum Technology
Airborne Gravimetry with Quantum Technology Open
In summer 2023 an airborne gravity survey was carried out utilizing the GIRAFE quantum gravimeter from ONERA and the iMAR classical strapdown gravimeter from DTU. The survey consisted of two parts: (1) In Iceland targeting the Vatnajö…
View article: Satellite gravity validation by new airborne gravimetry in coastal regions of Antarctica and Norway
Satellite gravity validation by new airborne gravimetry in coastal regions of Antarctica and Norway Open
Airborne gravimetry provides gravity observations of higher spatial resolution than what can be obtained from satellite gravity field measurements, and together with terrestrial measurements they augment the satellite observations to deter…
View article: Sub-Monthly Mass Change Signal over Ilulissat Glacier in Greenland from GRACE-FO Laser Interferometry Data
Sub-Monthly Mass Change Signal over Ilulissat Glacier in Greenland from GRACE-FO Laser Interferometry Data Open
GRACE(-FO) monthly products are produced routinely using measurements of the orbital motion and the K-Band measurements of the distance between the two satellites. From these solutions, we gained great insight into the water cycle, ice mas…
View article: Acknowledgement of reviewers for 2023
Acknowledgement of reviewers for 2023 Open
View article: Densification of the IHRF in Denmark, The Faroe Islands, and Greenland
Densification of the IHRF in Denmark, The Faroe Islands, and Greenland Open
The International Association of Geodesy (IAG) introduced and defined, in 2015, the International Height Reference System (IHRS) as the conventional reference system for the global physical height determination. Following the conventions f…
View article: Comment on tc-2023-104
Comment on tc-2023-104 Open
Abstract. The time series of observations from NASA’s latest satellite laser altimetry, the Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) are now mature to revisit the methodology for estimating surface elevation c…
View article: Antarctic Bedmap data: Findable, Accessible, Interoperable, and Reusable (FAIR) sharing of 60 years of ice bed, surface, and thickness data
Antarctic Bedmap data: Findable, Accessible, Interoperable, and Reusable (FAIR) sharing of 60 years of ice bed, surface, and thickness data Open
One of the key components of this research has been the mapping of Antarctic bed topography and ice thickness parameters that are crucial for modelling ice flow and hence for predicting future ice loss and the ensuing sea level rise. Suppo…
View article: Revisiting ice sheet mass balance: insights into changing dynamics in Greenland and Antarctica from ICESat-2
Revisiting ice sheet mass balance: insights into changing dynamics in Greenland and Antarctica from ICESat-2 Open
The time series of observations from NASA’s latest satellite laser altimetry, the Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) are now mature to revisit the methodology for estimating surface elevation change and mass balance of i…
View article: Scientific assessment of the CARIOQA-PMP quantum accelerometer pathfinder
Scientific assessment of the CARIOQA-PMP quantum accelerometer pathfinder Open
Satellite gravimetry is a unique tool to monitor the Earth’s mass variations. Satellite missions like GRACE and GRACE Follow-On provide insights into the time-variable gravity field on a global scale to further…
View article: Mass balance of the Greenland and Antarctic ice sheets from 1992 to 2020
Mass balance of the Greenland and Antarctic ice sheets from 1992 to 2020 Open
Ice losses from the Greenland and Antarctic ice sheets have accelerated since the 1990s, accounting for a significant increase in the global mean sea level. Here, we present a new 29-year record of ice sheet mass balance from 1992 to 2020 …
View article: Airborne Absolute Gravimetry With a Quantum Sensor, Comparison With Classical Technologies
Airborne Absolute Gravimetry With a Quantum Sensor, Comparison With Classical Technologies Open
We report an airborne gravity survey with an absolute gravimeter based on atom interferometry and two relative gravimeters: a classical LaCoste&Romberg (L&R) and a novel iMAR strapdown Inertial Measurement Unit. We estimated measurement er…
View article: Technology roadmap for cold-atoms based quantum inertial sensor in space
Technology roadmap for cold-atoms based quantum inertial sensor in space Open
Recent developments in quantum technology have resulted in a new generation of sensors for measuring inertial quantities, such as acceleration and rotation. These sensors can exhibit unprecedented sensitivity and accuracy when operated in …