Chicxulub impact acidified the ocean instantly

Chicxulub impact acidified the ocean instantly

The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash
The Chicxulub event was as damaging to life in the oceans as it was to creatures on land, a study shows. New York Times
https://www.nytimes.com/2019/10/21/science/chicxulub-asteroid-ocean-acid.html

Tiny shell fossils reveal how ocean acidification can cause mass extinction By Julie Zaugg, CNN, October 22, 2019
https://www.cnn.com/2019/10/22/europe/ocean-acidification-asteroid-intl-hnk-scn/index.html

New study underpins the idea of a sudden impact killing off dinosaurs and much of the other life, GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre October 22, 2019
https://www.sciencedaily.com/releases/2019/10/191022080721.htm

The open access paper is:

Michael J. Henehan, Andy Ridgwell, Ellen Thomas, Shuang Zhang, Laia Alegret, Daniela N. Schmidt, James W. B. Rae, James D. Witts, Neil H. Landman, Sarah E. Greene, Brian T. Huber, James R. Super, Noah J. Planavsky, Pincelli M. Hull,
2019, Rapid ocean acidification and protracted Earth system recovery followed the end-Cretaceous Chicxulub ??impact. Proceedings of the National Academy of Sciences
Oct 2019, 201905989; DOI: 10.1073/pnas.1905989116
https://www.pnas.org/content/early/2019/10/15/1905989116

Yours,

Paul H.

Acid Oceans, Not Asteroid Impacts, Contributed to Permian – Triassic Extinctions

Recent research indicates that acid oceans, not asteroid 
impacts, likely contributed to Earth’s worst mass extinction.

Go look at:

Ancient Acidic Ocean a Killer by Emily Sohn, Discovery News,
http://news.discovery.com/earth/ocean-acidification-110907.html

Acid oceans helped fuel mass extinction by Alexandra Witze, 
Science News, Sept 5, 2011, 
http://www.sciencenews.org/view/generic/id/333995/title/Acid_oceans_helped_fuel_mass_extinction

The paper is:

Montenegro, A., P. Spence, K. J. Meissner, M. Eby, M. J. Melchin, and 
S. T. Johnston, 2011, Climate simulations of the Permian-Triassic 
boundary: Ocean acidification and the extinction event, 
Paleoceanography, 26, PA3207, doi:10.1029/2010PA002058.

Abstract at http://www.agu.org/pubs/crossref/2011/2010PA002058.shtml

Dr. Peter Ward has published a book that discusses decades of
published research, which he has conducted into the Permian-
Triassic mass extinctions. It is:

Ward, P. D., 2008, Under a Green Sky. Harper-Collins Books.
242 pp. ISBN 978-0-06-163163-4

It is an excellent, entertaining, and thoughtful book about the 
Permian-Triassic mass extinctions that is well written for 
the lay public. I highly recommend it.

Related articled are:

Earth science: Lethal volcanism by Paul B. Wignall, Nature.
vol. 477, no. 7364, pp.  285–286.
http://www.nature.com/nature/journal/v477/n7364/full/477285a.html

Large Igneous Provinces and Mass Extinctions by , David Bressan,
‎Scientific American, Sept. 16, 2011, 
http://blogs.scientificamerican.com/history-of-geology/2011/09/16/large-igneous-provinces-and-mass-extinctions/

Best wishes,

Paul H.