Why study the Palaeocene-Eocene Thermal Maximum? - QUEST
Why study the Palaeocene-Eocene Thermal Maximum? - QUEST
Why study the Palaeocene-Eocene Thermal Maximum? - QUEST
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Bristol<br />
Dan Lunt<br />
Ron Kahana<br />
Andy Ridgwell<br />
Daniela Schmidt<br />
Paul Valdes<br />
Leeds<br />
Alan Haywood<br />
NOCS<br />
Cecily Chun<br />
Robert Marsh<br />
UCL<br />
Mark Maslin<br />
Tom Dunkley Jones<br />
Leg 208 Walvis Ridge<br />
The <strong>Palaeocene</strong><br />
<strong>Eocene</strong> <strong>Thermal</strong><br />
<strong>Maximum</strong><br />
Daniela N. Schmidt & Andy<br />
Ridgwell<br />
dPETM<br />
University of Bristol
Rapid Ocean acidification<br />
decline ≈ 0.0012 pH per year<br />
Hawaii<br />
Bermuda<br />
Caldeira and Wickett, Nature, 2003
Depth in core [m]<br />
Ocean acidification 58 to 52 Ma ago<br />
172.50<br />
172.75<br />
173.00<br />
173.25<br />
173.50<br />
173.75<br />
174.00<br />
Old,<br />
58.2 Ma<br />
0 10 20 30 40<br />
Change in lightness indicating dissolution [%]<br />
139.50<br />
139.75<br />
140.00<br />
140.25<br />
140.50<br />
140.75<br />
141.00<br />
0 10 20 30 40<br />
116.50<br />
0 10 20 30 40<br />
10 kyrs 210kyrs<br />
40 kyrs<br />
Mid <strong>Palaeocene</strong><br />
Event<br />
116.75<br />
117.00<br />
117.25<br />
117.50<br />
117.75<br />
229.50<br />
229.75<br />
230.00<br />
230.25<br />
230.50<br />
230.75<br />
Young<br />
52 Ma<br />
0 10 20 30 40<br />
118.00<br />
231.00<br />
PETM ETM 2 ETM 3<br />
Data from ODP Leg 208 IR 2004
Temperature rise<br />
Cramer et al 2003<br />
Bains et al 1999<br />
6 ºC warming<br />
Biotic change – algal blooms<br />
Sluijs et al 2008<br />
dinoflagelate [%]<br />
SST<br />
Temperature [° C]
10 µm<br />
f f-1<br />
f-4<br />
f-3<br />
f-2<br />
f-1<br />
f<br />
f-5<br />
f-9<br />
f-6<br />
f-8<br />
f-3<br />
f-7<br />
f-2
Environmental change - pH
apid and fossil fuel intensive<br />
economic growth
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