000074979 001__ 74979
000074979 005__ 20200117221611.0
000074979 0247_ $$2doi$$a10.5194/cp-14-1035-2018
000074979 0248_ $$2sideral$$a107506
000074979 037__ $$aART-2018-107506
000074979 041__ $$aeng
000074979 100__ $$aDunkley Jones, T.
000074979 245__ $$aDynamics of sediment flux to a bathyal continental margin section through the Paleocene-Eocene Thermal Maximum
000074979 260__ $$c2018
000074979 5060_ $$aAccess copy available to the general public$$fUnrestricted
000074979 5203_ $$aThe response of the Earth system to greenhouse-gas-driven warming is of critical importance for the future trajectory of our planetary environment. Hyperthermal events - past climate transients with global-scale warming significantly above background climate variability - can provide insights into the nature and magnitude of these responses. The largest hyperthermal of the Cenozoic was the Paleocene-Eocene Thermal Maximum (PETM ~ 56 Ma). Here we present new high-resolution bulk sediment stable isotope and major element data for the classic PETM section at Zumaia, Spain. With these data we provide a new detailed stratigraphic correlation to other key deep-ocean and terrestrial PETM reference sections. With this new correlation and age model we are able to demonstrate that detrital sediment accumulation rates within the Zumaia continental margin section increased more than 4-fold during the PETM, representing a radical change in regional hydrology that drove dramatic increases in terrestrial-to-marine sediment flux. Most remarkable is that detrital accumulation rates remain high throughout the body of the PETM, and even reach peak values during the recovery phase of the characteristic PETM carbon isotope excursion (CIE). Using a series of Earth system model inversions, driven by the new Zumaia carbon isotope record, we demonstrate that the silicate weathering feedback alone is insufficient to recover the PETM CIE, and that active organic carbon burial is required to match the observed dynamics of the CIE. Further, we demonstrate that the period of maximum organic carbon sequestration coincides with the peak in detrital accumulation rates observed at Zumaia. Based on these results, we hypothesise that orbital-scale variations in subtropical hydro-climates, and their subsequent impact on sediment dynamics, may contribute to the rapid climate and CIE recovery from peak-PETM conditions.
000074979 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2014-58794-P
000074979 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000074979 590__ $$a3.47$$b2018
000074979 591__ $$aMETEOROLOGY & ATMOSPHERIC SCIENCES$$b20 / 86 = 0.233$$c2018$$dQ1$$eT1
000074979 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b41 / 195 = 0.21$$c2018$$dQ1$$eT1
000074979 592__ $$a1.929$$b2018
000074979 593__ $$aGlobal and Planetary Change$$c2018$$dQ1
000074979 593__ $$aStratigraphy$$c2018$$dQ1
000074979 593__ $$aPaleontology$$c2018$$dQ1
000074979 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000074979 700__ $$aManners, H.R.
000074979 700__ $$aHoggett, M.
000074979 700__ $$aTurner, S.K.
000074979 700__ $$aWesterhold, T.
000074979 700__ $$aLeng, M.J.
000074979 700__ $$aPancost, R.D.
000074979 700__ $$aRidgwell, A.
000074979 700__ $$0(orcid)0000-0002-8801-9544$$aAlegret, L.$$uUniversidad de Zaragoza
000074979 700__ $$aDuller, R.
000074979 700__ $$aGrimes, S.T.
000074979 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000074979 773__ $$g14, 7 (2018), 1035-1049$$pClim. past.$$tClimate of the Past$$x1814-9324
000074979 8564_ $$s788215$$uhttps://zaguan.unizar.es/record/74979/files/texto_completo.pdf$$yVersión publicada
000074979 8564_ $$s109330$$uhttps://zaguan.unizar.es/record/74979/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000074979 909CO $$ooai:zaguan.unizar.es:74979$$particulos$$pdriver
000074979 951__ $$a2020-01-17-21:48:38
000074979 980__ $$aARTICLE