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How the climate can rapidly change at tipping points

A new study shows: Gradual changes in the atmospheric CO2 concentration can induce abrupt climate changes

During the last glacial period, within only a few decades the influence of atmospheric CO2 on the North Atlantic circulation resulted in temperature increases of up to 10 degrees Celsius in Greenland – as indicated by new climate calculations from researchers at the Alfred Wegener Institute and the University of Cardiff. Their study is the first to confirm that there have been situations in our planet’s history in which gradually rising CO2 concentrations have set off abrupt changes in ocean circulation and climate at “tipping points”. These sudden changes, referred to as Dansgaard-Oeschger events, have been observed in ice cores collected in Greenland. The results of the study have just been released in the journal Nature Geoscience.

download the paper at Nat. Geoscience here

credit: Alfred-Wegener-Institut / Martin Künsting (CC-BY 4.0)

International Open Science Conference

PalMod will organize an International Open Science Conference in Vienna 2018 (7.+8.4.2018), back to back to the EGU meeting. More information are available here. Details for registration, abstract submission etc will follow.

Upcoming international events

4ICESM in Hamburg
28.9.-1.9.2017

1^st PMIP4 Conference, Stockholm
25.9.-29.9.2017

PalMod International Open Science Conference, Vienna
7.-8.4.2018

Upcoming PalMod internal meetings

WG1: 22.-24.11.2017

WG2: 11.+12.9.2017

WG3: 20.+21.11.2017

WG4: 7.+8.9.2017
(registration deadline 31.7.2017)

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PalMod - Paleo Modelling

PalMod is funded by the Federal Ministry of Education and Science (BMBF) to understand climate system dynamics and variability during the last glacial cycle.

Recent Publications out of PalMod

A 156 kyr smoothed history of the atmospheric greenhouse gases CO₂, CH₄, and N₂O and their radiative forcing

Citation: Köhler, P., Nehrbass-Ahles, C., Schmitt, J., Stocker, T. F., and Fischer, H.: A 156 kyr smoothed history of the atmospheric greenhouse gases CO₂, CH₄, and N₂O and their radiative forcing, Earth Syst. Sci. Data, 9, 363-387, https://doi.org/10.5194/essd-9-363-2017 , 2017.

A model study of warming-induced phosphorus–oxygen feedbacks in open-ocean oxygen minimum zones on millennial timescales

Citation: Niemeyer, D., Kemena, T. P., Meissner, K. J., and Oschlies, A.: A model study of warming-induced phosphorus–oxygen feedbacks in open-ocean oxygen minimum zones on millennial timescales, Earth Syst. Dynam., 8, 357-367, doi:10.5194/esd-8-357-2017, 2017.

Assimilation of Pseudo-Tree-Ring-Width observations into an Atmospheric General Circulation Model

Citation: Acevedo, W., Fallah, B., Reich, S., and Cubasch, U.: Assimilation of pseudo-tree-ring-width observations into an atmospheric general circulation model, Clim. Past, 13, 545-557, doi:10.5194/cp-13-545-2017, 2017.

Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies

Citation: Jonkers, L. and Kučera, M.: Quantifying the effect of seasonal and vertical habitat tracking on planktonic foraminifera proxies, Clim. Past, 13, 573-586, https://doi.org/10.5194/cp-13-573-2017, 2017.

All PalMod publications are listed here.