Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions
While there is evidence for an acceleration in global mean sea-level (MSL) since the 1960s, its detection at local levels has been hampered by the considerable influence of natural variability on the rate of MSL change. Here we report an MSL acceleration in tide gauge records along the U.S. Southeas...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5016759 2023-10-09T21:54:00+02:00 Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions Dangendorf, S. Hendricks, N. Sun, Q. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016759 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-0729 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016759 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-0729 2023-09-17T23:43:20Z While there is evidence for an acceleration in global mean sea-level (MSL) since the 1960s, its detection at local levels has been hampered by the considerable influence of natural variability on the rate of MSL change. Here we report an MSL acceleration in tide gauge records along the U.S. Southeast and Gulf coasts that has led to rates (>10 mmyr-1 since 2010) that are unprecedented in at least 120 years. Using a variety of remote sensing and in-situ measurements in combination with climate model outputs, we show that this acceleration is primarily induced by an ocean dynamic signal exceeding the externally forced response from historical climate model simulations. However, when the simulated forced response is removed from observations, the residuals are neither historically unprecedented nor inconsistent with unforced variability in simulations. Furthermore, a large fraction of the residuals can be explained by remote wind forcing (via Rossby waves) over the tropical North Atlantic. This indicates that the acceleration represents the compounding effects of external forcing and internal climate variability. Conference Object North Atlantic GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
While there is evidence for an acceleration in global mean sea-level (MSL) since the 1960s, its detection at local levels has been hampered by the considerable influence of natural variability on the rate of MSL change. Here we report an MSL acceleration in tide gauge records along the U.S. Southeast and Gulf coasts that has led to rates (>10 mmyr-1 since 2010) that are unprecedented in at least 120 years. Using a variety of remote sensing and in-situ measurements in combination with climate model outputs, we show that this acceleration is primarily induced by an ocean dynamic signal exceeding the externally forced response from historical climate model simulations. However, when the simulated forced response is removed from observations, the residuals are neither historically unprecedented nor inconsistent with unforced variability in simulations. Furthermore, a large fraction of the residuals can be explained by remote wind forcing (via Rossby waves) over the tropical North Atlantic. This indicates that the acceleration represents the compounding effects of external forcing and internal climate variability. |
format |
Conference Object |
author |
Dangendorf, S. Hendricks, N. Sun, Q. |
spellingShingle |
Dangendorf, S. Hendricks, N. Sun, Q. Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
author_facet |
Dangendorf, S. Hendricks, N. Sun, Q. |
author_sort |
Dangendorf, S. |
title |
Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
title_short |
Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
title_full |
Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
title_fullStr |
Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
title_full_unstemmed |
Acceleration of U.S. Southeast and gulf coast sea-level rise: Forced and unforced contributions |
title_sort |
acceleration of u.s. southeast and gulf coast sea-level rise: forced and unforced contributions |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016759 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-0729 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016759 |
op_doi |
https://doi.org/10.57757/IUGG23-0729 |
_version_ |
1779317419234295808 |