FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4315865153> ?p ?o ?g. }

• W4315865153 endingPage "140" @default.
• W4315865153 startingPage "123" @default.
• W4315865153 abstract "Abstract. A major step in the long-term Cenozoic evolution toward a glacially driven climate occurred at the Eocene–Oligocene transition (EOT), ∼34.44 to 33.65 million years ago (Ma). Evidence for high-latitude cooling and increased latitudinal temperature gradients across the EOT has been found in a range of marine and terrestrial environments. However, the timing and magnitude of temperature change in the North Atlantic remains highly unconstrained. Here, we use two independent organic geochemical palaeothermometers to reconstruct sea surface temperatures (SSTs) from the southern Labrador Sea (Ocean Drilling Program – ODP Site 647) across the EOT. The new SST records, now the most detailed for the North Atlantic through the 1 Myr leading up to the EOT onset, reveal a distinctive cooling step of ∼3 ∘C (from 27 to 24 ∘C), between 34.9 and 34.3 Ma, which is ∼500 kyr prior to Antarctic glaciation. This cooling step, when compared visually to other SST records, is asynchronous across Atlantic sites, signifying considerable spatiotemporal variability in regional SST evolution. However, overall, it fits within a phase of general SST cooling recorded across sites in the North Atlantic in the 5 Myr bracketing the EOT. Such cooling might be unexpected in light of proxy and modelling studies suggesting the start-up of the Atlantic Meridional Overturning Circulation (AMOC) before the EOT, which should warm the North Atlantic. Results of an EOT modelling study (GFDL CM2.1) help reconcile this, finding that a reduction in atmospheric CO2 from 800 to 400 ppm may be enough to counter the warming from an AMOC start-up, here simulated through Arctic–Atlantic gateway closure. While the model simulations applied here are not yet in full equilibrium, and the experiments are idealised, the results, together with the proxy data, highlight the heterogeneity of basin-scale surface ocean responses to the EOT thermohaline changes, with sharp temperature contrasts expected across the northern North Atlantic as positions of the subtropical and subpolar gyre systems shift. Suggested future work includes increasing spatial coverage and resolution of regional SST proxy records across the North Atlantic to identify likely thermohaline fingerprints of the EOT AMOC start-up, as well as critical analysis of the causes of inter-model responses to help better understand the driving mechanisms." @default.
• W4315865153 created "2023-01-13" @default.
• W4315865153 creator A5019122347 @default.
• W4315865153 creator A5022885821 @default.
• W4315865153 creator A5025073569 @default.
• W4315865153 creator A5040744732 @default.
• W4315865153 creator A5040898541 @default.
• W4315865153 creator A5088897773 @default.
• W4315865153 date "2023-01-13" @default.
• W4315865153 modified "2023-10-17" @default.
• W4315865153 title "Sea surface temperature evolution of the North Atlantic Ocean across the Eocene–Oligocene transition" @default.
• W4315865153 cites W1520794900 @default.
• W4315865153 cites W1595427180 @default.
• W4315865153 cites W1673135679 @default.
• W4315865153 cites W1873043983 @default.
• W4315865153 cites W1876590315 @default.
• W4315865153 cites W191871733 @default.
• W4315865153 cites W1970377764 @default.
• W4315865153 cites W1976974888 @default.
• W4315865153 cites W1990565695 @default.
• W4315865153 cites W1990789960 @default.
• W4315865153 cites W1991795942 @default.
• W4315865153 cites W1992544756 @default.
• W4315865153 cites W1995217673 @default.
• W4315865153 cites W1996140761 @default.
• W4315865153 cites W1996302852 @default.
• W4315865153 cites W1996413328 @default.
• W4315865153 cites W1997421795 @default.
• W4315865153 cites W2000053397 @default.
• W4315865153 cites W2000559916 @default.
• W4315865153 cites W2003164867 @default.
• W4315865153 cites W2005832186 @default.
• W4315865153 cites W2010611995 @default.
• W4315865153 cites W2020778049 @default.
• W4315865153 cites W2022224685 @default.
• W4315865153 cites W2024032230 @default.
• W4315865153 cites W2028817233 @default.
• W4315865153 cites W2028837171 @default.
• W4315865153 cites W2044231262 @default.
• W4315865153 cites W2050251234 @default.
• W4315865153 cites W2053251742 @default.
• W4315865153 cites W2053399192 @default.
• W4315865153 cites W2058410188 @default.
• W4315865153 cites W2060167601 @default.
• W4315865153 cites W2062864893 @default.
• W4315865153 cites W2072698856 @default.
• W4315865153 cites W2076574789 @default.
• W4315865153 cites W2091232642 @default.
• W4315865153 cites W2091284813 @default.
• W4315865153 cites W2094137719 @default.
• W4315865153 cites W2100937711 @default.
• W4315865153 cites W2101159968 @default.
• W4315865153 cites W2101724063 @default.
• W4315865153 cites W2105390415 @default.
• W4315865153 cites W2116972303 @default.
• W4315865153 cites W2117055554 @default.
• W4315865153 cites W2119490780 @default.
• W4315865153 cites W2120560331 @default.
• W4315865153 cites W2121038137 @default.
• W4315865153 cites W2131142087 @default.
• W4315865153 cites W2131492290 @default.
• W4315865153 cites W2131661856 @default.
• W4315865153 cites W2137306226 @default.
• W4315865153 cites W2142128886 @default.
• W4315865153 cites W2143644603 @default.
• W4315865153 cites W2159314511 @default.
• W4315865153 cites W2160267479 @default.
• W4315865153 cites W2171910152 @default.
• W4315865153 cites W2260222237 @default.
• W4315865153 cites W2263896774 @default.
• W4315865153 cites W2272286143 @default.
• W4315865153 cites W2321821390 @default.
• W4315865153 cites W2337297954 @default.
• W4315865153 cites W2346672614 @default.
• W4315865153 cites W2419322613 @default.
• W4315865153 cites W2501220252 @default.
• W4315865153 cites W2520565154 @default.
• W4315865153 cites W2522798752 @default.
• W4315865153 cites W2578721030 @default.
• W4315865153 cites W2580055030 @default.
• W4315865153 cites W2624009236 @default.
• W4315865153 cites W2741530874 @default.
• W4315865153 cites W2782280842 @default.
• W4315865153 cites W2782647711 @default.
• W4315865153 cites W2794326632 @default.
• W4315865153 cites W2806048543 @default.
• W4315865153 cites W2810483696 @default.
• W4315865153 cites W2826424246 @default.
• W4315865153 cites W283674652 @default.
• W4315865153 cites W2890064677 @default.
• W4315865153 cites W2894079721 @default.
• W4315865153 cites W2917807898 @default.
• W4315865153 cites W2921442565 @default.
• W4315865153 cites W2947294889 @default.
• W4315865153 cites W2969251477 @default.
• W4315865153 cites W2971992701 @default.
• W4315865153 cites W2986025009 @default.
• W4315865153 cites W2996174187 @default.

• next