Arctic Sea Level Budget Assessment during the GRACE/Argo Time Period

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Roshin Raj - , Bjerknes Center for Climate Research, University of Bergen (Author)
  • Ole Andersen - , Technical University of Denmark (Author)
  • Johnny Johannessen - , Nansen Environmental and Remote Sensing Center (NERSC), University of Bergen (Author)
  • Benjamin Gutknecht - , Chair of Geodetic Earth System Research (Author)
  • Sourav Chatterjee - , National Centre for Polar and Ocean Research (NCPOR) (Author)
  • Stine Rose - , Technical University of Denmark (Author)
  • Antonio Bonaduce - , Bjerknes Center for Climate Research, Nansen Environmental and Remote Sensing Center (NERSC) (Author)
  • Martin Horwath - , Chair of Geodetic Earth System Research (Author)
  • Heidi Ranndal - , Technical University of Denmark (Author)
  • Kristin Richter - , Bjerknes Center for Climate Research, Norwegian Research Centre (Author)
  • Hindumathi Palanisamy - , Laboratory of Space Geophysical and Oceanographic Studies (Author)
  • Carsten Ludwigsen - , Technical University of Denmark (Author)
  • Laurent Bertino - , Bjerknes Center for Climate Research, Nansen Environmental and Remote Sensing Center (NERSC) (Author)
  • J. Even Ø. Nilsen - , Institute of Marine Research (Author)
  • Per Knudsen - , Technical University of Denmark (Author)
  • Anna Hogg - , University of Leeds (Author)
  • Anny Cazenave - , Laboratory of Space Geophysical and Oceanographic Studies (Author)
  • Jérôme Benveniste - , European Space Agency - ESA (Author)

Abstract

Sea level change is an important indicator of climate change. Our study focuses on the sea level budget assessment of the Arctic Ocean using: (1) the newly reprocessed satellite altimeter data with major changes in the processing techniques; (2) ocean mass change data derived from GRACE satellite gravimetry; (3) and steric height estimated from gridded hydrographic data for the GRACE/Argo time period (2003–2016). The Beaufort Gyre (BG) and the Nordic Seas (NS) regions exhibit the largest positive trend in sea level during the study period. Halosteric sea level change is found to dominate the area averaged sea level trend of BG, while the trend in NS is found to be influenced by halosteric and ocean mass change effects. Temporal variability of sea level in these two regions reveals a significant shift in the trend pattern centered around 2009–2011. Analysis suggests that this shift can be explained by a change in large-scale atmospheric circulation patterns over the Arctic. The sea level budget assessment of the Arctic found a residual trend of more than 1.0 mm/yr. This nonclosure of the sea level budget is further attributed to the limitations of the three above mentioned datasets in the Arctic region.

Details

Original languageEnglish
Article number2837
JournalRemote sensing
Volume12
Issue number17
Publication statusPublished - 1 Sept 2020
Peer-reviewedYes

External IDs

Scopus 85095437215
ORCID /0000-0001-5797-244X/work/142246533

Keywords

Library keywords