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 two sets of simulations at 4x and 2x CO2, through the Cretaceous-Paleocene-Eocene. In addition for the modern -Gelasian- there are simulations at 1x and 2x CO2.
You can have make you own analysis and plots by going here
| Simulation Name as in Paper | Simulation name on web pages |
|---|---|
| Priabonian 4x | teuya |
| Bartonian 4x | teuyb |
| Lutetian 4x | teuyc |
| Ypresian 4x | teuyd |
| Thanetian 4x | teuye |
| Selandian 4x | teuyf |
| Danian 4x | teuyg |
| Maastrichtian 4x | teuyh |
| Campanian 4x | teuyi |
| Santonian 4x | teuyj |
| Coniacian 4x | teuyk |
| Turonian 4x | teuyl |
| Cenomanian 4x | teuym |
| Albian 4x | teuyn |
| Aptian 4x | teuyo |
| Barremian 4x | teuyp |
| Hauterivian 4x | teuyq |
| Valanginian 4x | teuyr |
| Berriasian 4x | teuys |
| Priabonian 2x | teuyA |
| Bartonian 2x | teuyB |
| Lutetian 2x | teuyC |
| Ypresian 2x | teuyD |
| Thanetian 2x | teuyE |
| Selandian 2x | teuyF |
| Danian 2x | teuyG |
| Maastrichtian 2x | teuyH |
| Campanian 2x | teuyI |
| Santonian 2x | teuyJ |
| Coniacian 2x | teuyK |
| Turonian 2x | teuyL |
| Cenomanian 2x | teuyM |
| Albian 2x | teuyN |
| Aptian 2x | teuyO |
| Barremian 2x | teuyP |
| Hauterivian 2x | teuyQ |
| Valanginian 2x | teuyR |
| Berriasian 2x | teuyS |
| Gelasian 2x | teuyT |
| Gelasian 1x | teuyt |
Climate sensitivity on geological timescales depends on continental configuration. Ocean area and ocean circulation non-linearly determine climate and climate sensitivity. Past climate sensitivity is not necessarily a good analogue for future climate sensitivity
| Name | Farnsworth et al |
|---|---|
| Brief Description | Climate sensitivity on geological timescales depends on continental configuration. Ocean area and ocean circulation non-linearly determine climate and climate sensitivity. Past climate sensitivity is not necessarily a good analogue for future climate sensitivity |
| Full Author List | A. Farnsworth, D.J. Lunt, C. O'Brien, G.L. Foster, G.N. Inglis, P. Markwick, R.D. Pancost, S.A. Robinson |
| Title | Climate sensitivity on geological timescales controlled by non-linear feedbacks and ocean circulation |
| Year | 2019 |
| Journal | Geophysical Research Letters |
| Volume | - |
| Issue | |
| Pages | |
| DOI | - |
| Contact's Name | Dan Lunt |
| Contact's email | d.j.lunt@bristol.ac.uk |
| Abstract | Climate sensitivity is a key metric used to assess the magnitude of global warming given increased CO2 concentrations. The geological past can provide insights into climate sensitivity; however, on timescales of millions of years, factors other than CO2 can drive climate, including paleogeographic forcing and solar luminosity. Here, through an ensemble of climate model simulations covering the period 150-35 million years ago, we show that climate sensitivity to CO2 doubling varies between 3.5-5.5 oC through this time. These variations can be explained as a non-linear response to solar luminosity, evolving surface albedo due to changes in ocean area, and changes in ocean circulation. The work shows that the modern climate sensitivity is relatively low in the context of the geological record, as a result of relatively weak feedbacks due to a relatively low CO2 baseline, and the presence of ice and relatively small ocean area in the modern continental configuration. |