Early Cenozoic Decoupling of Climate and Carbonate Compensation Depth Trends.

ABSTRACT: Our understanding of the long-term evolution of the Earth system is based on the assumption that terrestrial weathering rates should respond to, and hence help regulate, atmospheric CO₂ and climate. Increased terrestrial weathering requires increased carbonate accumulation in marine sediments, which in turn is expected to result in a long-term deepening of the carbonate compensation depth (CCD). Here, we critically assess this long-term relationship between climate and carbon cycling. We generate a record of marine deep-sea carbonate abundance from selected late Paleocene through early Eocene time slices to reconstruct the position of the CCD. Although our data set allows for a modest CCD deepening, we find no statistically significant change in the CCD despite >3 °C global warm

SUBMITTER: Greene SE 

PROVIDER: S-EPMC6774345 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature