Atmospheric dust under glacial and interglacial conditions

Denitrification under glacial and interglacial conditions: A physical approach

[1] Recent analysis of sedimentary dN records over the last 200,000 years has shown an expansion of water column denitrification zones during warmer periods and a shrinkage of these oxygen-poor regions during glacial periods. Two different mechanisms could be responsible for driving the changes in the denitrification records: variations in local productivity leading to a change in remineralizat...

Glacial-Interglacial Atmospheric CO2 Change —The Glacial Burial Hypothesis

Organic carbon buried under the great ice sheets of the Northern Hemisphere is suggested to be the missing link in the atmospheric CO2 change over the glacial-interglacial cycles. At glaciation, the advancement of continental ice sheets buries vegetation and soil carbon accumulated during warmer periods. At deglaciation, this burial carbon is released back into the atmosphere. In a simulation o...

Theories and Modeling of Glacial–Interglacial Cycles and Glacial Inception

Simulating last interglacial and glacial inception

Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract The Planet Simulator was used to perform equilibrium simulations of the Eemian inter-glacial at 125 kyBP and the glacial inception at 115 kyBP. Additio...

Covariant glacial-interglacial dust fluxes in the equatorial Pacific and Antarctica.

Dust plays a critical role in Earth's climate system and serves as a natural source of iron and other micronutrients to remote regions of the ocean. We have generated records of dust deposition over the past 500,000 years at three sites spanning the breadth of the equatorial Pacific Ocean. Equatorial Pacific dust fluxes are highly correlated with global ice volume and with dust fluxes to Antarc...