RedGage

Description

Download scientific diagram | Bulk carbon characteristics and biomarkers in sediments of core 31-PC over the past 27 ka B.P., which covers the Dansgaard-Oeschger event 3 (DO-3), the cold Last Glacial Maximum (LGM), the Heinrich Stadial 1 (HS-1), the Bølling-Allerød (BA) warm interstadial, the cold Younger Dryas (YD) stadial, and the warm Holocene/Interglacial [including the EH Preboreal (PB)]. The curves show (A) the North Greenland Ice Core Project (NGRIP)  18 O record (39), (B) the total OC flux to the 31-PC location (g m −2 year −1 ), (C)  13 C of OC, and (D) the predepositional 14 C age of OC. It further shows (E) terrestrial biomarker fluxes of lignin phenols, HMW n-alkanes and n-alkanoic acids (g m −2 year −1 ), as well as (F) fractions of the total OC flux (g m −2 year −1 ) and the 1 uncertainties based on statistical source apportionment of OC mobilized from the two permafrost pools ICDs and permafrost active layer (AL). *The range bar indicates extent of possible delay in arrival of the PF-C signal from EH warming, due to the large increase of crossshelf transport times (text S2) (40). from publication: Remobilization of dormant carbon from Siberian-Arctic permafrost during three past warming events | Carbon cycle models suggest that past warming events in the Arctic may have caused large-scale permafrost thaw and carbon remobilization, thus affecting atmospheric CO 2 levels. However, observational records are sparse, preventing spatially extensive and time-continuous... | Permafrost, Carbon and Arctic | ResearchGate, the professional network for scientists.