Polar amplification of Pliocene climate by elevated trace gas radiative forcing.

ABSTRACT: Warm periods in Earth's history offer opportunities to understand the dynamics of the Earth system under conditions that are similar to those expected in the near future. The Middle Pliocene warm period (MPWP), from 3.3 to 3.0 My B.P, is the most recent time when atmospheric CO₂ levels were as high as today. However, climate model simulations of the Pliocene underestimate high-latitude warming that has been reconstructed from fossil pollen samples and other geological archives. One possible reason for this is that enhanced non-CO₂ trace gas radiative forcing during the Pliocene, including from methane (CH₄), has not been included in modeling. We use a suite of terrestrial biogeochemistry models forced with MPWP climate model simulations from four different

SUBMITTER: Hopcroft PO 

PROVIDER: S-EPMC7519348 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature