Impact of 10-Myr scale monsoon dynamics on Mesozoic climate and ecosystems.

ABSTRACT: Earth's orbital variations on timescales of 10⁴-10⁵ years, known as Milankovitch cycles, have played a critical role in pacing climate change and ecosystem dynamics, through glacial and/or monsoon dynamics. However, the climatic and biotic consequences of these cycles on much longer (~ 10⁷ years) timescales remain unclear, due to a lack of long proxy records with precise age constraints. Here, we show ~ 10-Myr scale variations in early Mesozoic (250-180 Ma) records of lake-level, desert distribution, biogenic-silica burial flux, atmospheric CO₂ levels (pCO₂), and sea-surface-temperature (SST). Their phase relationships, coupled with carbon cycle modeling results, suggest that orbitally-paced summer monsoon dynamics modulates changes in

SUBMITTER: Ikeda M 

PROVIDER: S-EPMC7378230 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature