2007/11/01 by Katrin J. Meißner · 1 citation
Earth and Planetary Sciences · Environmental Science · #Geology and Paleoclimatology Research #Paleontology and Stratigraphy of Fossils #Methane Hydrates and Related Phenomena
paper · pdf · doi:10.1029/2007gl031304
openalex publication_date 2007/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/05/21
The University of Victoria Earth System Climate Model (UVic ESCM) is used to compare simulated time series of radiocarbon during the Younger Dryas (YD) with paleoceanographic records. I find that only a complete shut‐down and recovery of the Atlantic Meridional Overturning Circulation (AMOC) can simulate both the rise in atmospheric CO 2 concentrations seen in ice core records and the peak and subsequent decrease in atmospheric Δ 14 C comparable to the peak recorded in the varved sediments of the Cariaco Basin. Simulated radiocarbon profiles in the western North Atlantic match well with data from deep‐sea corals at the beginning of the YD, whereas planktonic/benthic foraminifera records match best with a transient state during the rapid recovery of the AMOC. The steepness of the increase in atmospheric Δ 14 C at ∼12.9 ka cal could not be simulated with oceanic circulation changes only because the response time of the climate system is too slow.