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A pronounced spike in ocean productivity triggered by the Chicxulub impact

Authors
/persons/resource/julia.brugger

Brugger,  Julia
Potsdam Institute for Climate Impact Research;

/persons/resource/Georg.Feulner

Feulner,  Georg
Potsdam Institute for Climate Impact Research;

/persons/resource/matthias.hofmann

Hofmann,  Matthias
Potsdam Institute for Climate Impact Research;

/persons/resource/petri

Petri,  Stefan
Potsdam Institute for Climate Impact Research;

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Citation

Brugger, J., Feulner, G., Hofmann, M., Petri, S. (in press): A pronounced spike in ocean productivity triggered by the Chicxulub impact. - Geophysical Research Letters, e2020GL092260.
https://doi.org/10.1029/2020GL092260


Cite as: https://publications.pik-potsdam.de/pubman/item/item_25665
Abstract
There is increasing evidence linking the mass-extinction event at the Cretaceous-Paleogene boundary to an asteroid impact near Chicxulub, Mexico. Here we use model simulations to explore the combined effect of sulfate aerosols, carbon dioxide and dust from the impact on the oceans and the marine biosphere in the immediate aftermath of the impact. We find a strong temperature decrease, a brief algal bloom caused by nutrients from both the deep ocean and the projectile, and moderate surface ocean acidification. Comparing the modeled longer-term post-impact warming and changes in carbon isotopes with empirical evidence points to a substantial release of carbon from the terrestrial biosphere. Overall, our results shed light on the decades to centuries after the Chicxulub impact which are difficult to resolve with proxy data.