Contribution of Time-varying Discharge from Greenland and Rivers to Regional Sea Level Change in the Arctic Ocean ...

• Main Authors: Tajouri, Soumaia, Llovel, William, Sévellec, Florian, Penduff, Thierry, Molines, Jean-Marc, Leroux, Stéphanie
• Format: Conference Object
• Language: unknown
• Published: CNES 2023
• Subjects: Arctic; Arctic Ocean; Greenland; Climate change
• Online Access: https://dx.doi.org/10.24400/527896/a03-2023.3692; https://ostst.aviso.altimetry.fr/programs/abstracts-details.html?tx_ausyclsseminar_pi2[objAbstracte]=3692&cHash=X

Global mean sea level rise is an important indicator of ongoing climate change. For the first time, high-quality satellite altimetry data reveal large regional variability in sea level trends with regions experiencing a linear rise three times larger than the global mean trend. These trends are mainly explained by temperature changes. However, salinity changes can also play an important role in several regions such as in the Arctic Ocean. These temperature/salinity changes are themselves linked to a variety of drivers such as ocean circulation, ocean dynamics, air-sea fluxes and continental freshwater discharges. In particular, freshwater discharges from Greenland and rivers remain poorly understood due to a lack of in situ measurements. Recent improvements in the estimation of the interannual variability of freshwater discharges from Greenland and rivers allow us to isolate and quantify the contribution of such freshwater discharge to regional sea level change over the altimetric period 1993-2018. For that ...