For a fuller description of the paper itself, go to the end of this web page.
Each simulation published in this paper corresponds to a unique 5 or 6 character code on the web pages.
The following table lists the name of the simulation as used in the paper, and the corresponding code name
The webpage gives you the ability to examine the published simulations, but you can also download the raw (netcdf) files to perform your own analysis. Detailed instructions on how to use the webpages and access the data can be found here: Using_BRIDGE_webpages.pdf
There are 6 simulations used in this paper: 3 different ice sheet states on 2 different palaeogeographies at the EOT
You can have make you own analysis and plots by going here
| Simulation Name as in Paper | Simulation name on web pages |
|---|---|
| 1xCO2 - Early Eocene with 1 x pre-ind CO2 concentrations | tbpid |
| 2xCO2 - Early Eocene with 2 x pre-ind CO2 concentrations | tbpie |
| 4xCO2 - Early Eocene with 4 x pre-ind CO2 concentrations | tbpif |
| 6xCO2 - Early Eocene with 6 x pre-ind CO2 concentrations | tbpig |
| Preind - Preindustrial control | xbowc |
This paper shows that changes in CO2 during the Eocene could drive major changes in the ocean circulation, and hence potentially impact on gas hydrate stability
| Name | Lunt et al |
|---|---|
| Brief Description | This paper shows that changes in CO2 during the Eocene could drive major changes in the ocean circulation, and hence potentially impact on gas hydrate stability |
| Full Author List | Daniel J. Lunt, Paul J. Valdes, Tom Dunkley Jones, Andy Ridgwell, Alan M. Haywood, Daniela N. Schmidt, Robert Marsh and Mark Maslin |
| Title | CO2-driven ocean circulation changes as an amplifier of Paleocene-Eocene thermal maximum hydrate destabilization |
| Year | 2010 |
| Journal | Geology |
| Volume | 38 |
| Issue | 3-4 |
| Pages | 875-878 |
| DOI | 10.1130/G31184.1 |
| Contact's Name | Dan Lunt |
| Contact's email | D.J.Lunt@bristol.ac.uk |
| Abstract | Changes in ocean circulation have been proposed as a trigger mechanism for the large coupled climate and carbon cycle perturbations at the Paleocene-Eocene Thermal Maximum (PETM, ca. 55 Ma). An abrupt warming of oceanic intermediate waters could have initiated the thermal destabilization of sediment-hosted methane gas hydrates and potentially triggered sediment slumps and slides. In an ensemble of fully coupled atmosphere-ocean general circulation model (AOGCM) simulations of the late Paleocene and early Eocene, we identify such a circulation-driven enhanced intermediate-water warming. Critically, we fi nd an approximate twofold amplifi cation of Atlantic intermediate-water warming when CO2 levels are doubled from 2x to 4x preindustrial CO2 compared to when they are doubled from 1x to 2x. This warming is largely focused on the equatorial and South Atlantic and is driven by a significant reduction in deep-water formation from the Southern Ocean. This scenario is consistent with altered PETM circulation patterns inferred from benthic carbon isotope data and the intensity of deep-sea carbonate dissolution in the South Atlantic. The linkage between intermediate-water warming and gas hydrate destabilization could provide an important feedback in the establishment of peak PETM warmth. |