English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Abstract. A new monthly global sea level reconstruction for 1900–2015 wasanalyzed and compared with various observations to examine regionalvariability and trends in the ocean dynamics of the western North AtlanticOcean and the US East Coast. Proxies of the Gulf Stream (GS) strength inthe Mid-Atlantic Bight (GS-MAB) and in the South Atlantic Bight (GS-SAB)were derived from sea level differences across the GS. While decadaloscillations dominate the 116-year record, the analysis showed anunprecedented long period of weakening in the GS flow since the late 1990s.The only other period of long weakening in the record was during the1960s–1970s, and red noise experiments showed that is very unlikely thatthose just occurred by chance. Ensemble empirical mode decomposition (EEMD)was used to separate oscillations at different timescales, showing that thelow-frequency variability of the GS is connected to the AtlanticMulti-decadal Oscillation (AMO) and the Atlantic Meridional OverturningCirculation (AMOC). The recent weakening of the reconstructed GS-MAB wasmostly influenced by weakening of the upper mid-ocean transport component ofAMOC as observed by the RAPID measurements for 2005–2015. Comparison betweenthe reconstructed sea level near the coast and tide gauge data for 1927–2015showed that the reconstruction underestimated observed coastal sea levelvariability for timescales less than ∼5 years, but lower-frequency variability of coastal sea level was captured very well in bothamplitude and phase by the reconstruction. Comparison between the GS-SABproxy and the observed Florida Current transport for 1982–2015 also showedsignificant correlations for oscillations with periods longer than∼5 years. The study demonstrated that despite the coarsehorizontal resolution of the global reconstruction (1∘ × 1∘), long-term variations in regional dynamics can be capturedquite well, thus making the data useful for studies of long-term variabilityin other regions as well.

ocean science

Global sea level reconstruction for 1900–2015 reveals regional variability in ocean dynamics and an unprecedented long weakening in the Gulf Stream flow since the 1990s