Present-day sea level rise: from satellite and in situ observations to physical causes

We investigate climate-related processes causing variations of the global mean sea level on interannual to decadal time scale. We focus on thermal expansion of the oceans and continental water mass balance. We show that during the 1990s where global mean sea level change has been measured by Topex/P...

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Bibliographic Details
Main Authors: Cazenave, A., Do Minh, K., Gennero, M.C.
Other Authors: Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)
Format: Book Part
Language:English
Published: HAL CCSD 2004
Subjects:
sea level
satellite altimetry
thermal expansion
land water
ice melting
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Ice Sheet
Online Access:https://hal.science/hal-00280319
https://hal.science/hal-00280319/document
https://hal.science/hal-00280319/file/ACKDM.pdf
https://doi.org/10.1007/978-3-642-18861-9_2
Description
Summary:We investigate climate-related processes causing variations of the global mean sea level on interannual to decadal time scale. We focus on thermal expansion of the oceans and continental water mass balance. We show that during the 1990s where global mean sea level change has been measured by Topex/Poseidon satellite altimetry, thermal expansion is the dominant contribution to the observed 3 mm/yr sea level rise. For the past decade, exchange of water between continental reservoirs and oceans as well as glaciers and ice sheet melting may account to up 1 mm/yr. This suggests that there is a missing contribution which counterbalances the 1 mm/yr eustatic contribution. Dam building and irrigation associated with anthropogenic activities appear able to cancel out the effect of ice melting and land water change. For the last four decades, thermal contribution is estimated to about 0.5 mm/yr, with a possible accelerated rate of steric sea level rise during the 1990s.

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