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
Getech Paleogeography expts over the last 300 million years at a geological stage level.
You can have make you own analysis and plots by going here
| Simulation Name as in Paper | Simulation name on web pages |
|---|---|
| HadAM modern | xatxa |
| HadAM LGM | xatxd |
| HadRM modern | xatxb |
| HadRM LGM | xatxh |
This paper shows that increasing resolution can improve certain aspects of the simulation of LGM temperatures compared with observations. The results here are for the HadAM and HadRM models.
| Name | Jost et al |
|---|---|
| Brief Description | This paper shows that increasing resolution can improve certain aspects of the simulation of LGM temperatures compared with observations. The results here are for the HadAM and HadRM models. |
| Full Author List | A. Jost, D. Lunt, M. Kageyama, A. Abe-Ouchi, O. Peyron, P.J. Valdes, G. Ramstein |
| Title | High-resolution simulations of the last glacial maximum climate over Europe: a solution to discrepancies with continental palaeoclimatic reconstructions? |
| Year | 2005 |
| Journal | Climate Dynamics |
| Volume | 24 |
| Issue | 3-4 |
| Pages | 577-590 |
| DOI | |
| Contact's Name | Dan Lunt |
| Contact's email | D.J.Lunt@bristol.ac.uk |
| Abstract | The analyses of low-resolution models simulations of the last glacial maximum (LGM, 21 kyr BP) climate have revealed a large discrepancy between all the models and pollen-based palaeoclimatic reconstructions. In general, the models are too warm relative to the observations, especially in winter, where the difference is of the order of 10 degrees C over western Europe. One of the causes of this discrepancy may be related to the low spatial resolution of these models. To assess the impact of using high-resolution models on simulated climate sensitivity, we use three approaches to obtain high-resolution climate simulations over Europe: first an atmospheric general circulation model (AGCM) with a stretched grid over Europe, second a homogeneous T106 AGCM (high resolution everywhere on the globe) and last a limited area model (LAM) nested in a low-resolution AGCM. With all three methods, we have performed simulations of the European climate for present and LGM conditions, according to the experimental design recommended by the Palaeoclimate Modeling Intercomparison Project (PMIP). Model results have been compared with updated pollen-based palaeoclimatic indicators for temperature and precipitation that were initially developed in PMIP. For each model, a low-resolution global run was also performed. As expected, the low resolution simulations underestimate the large cooling indicated by pollen data, especially in winter, despite revised slightly warmer reconstructions of the temperatures of the coldest month, and show results in the range of those obtained in PMIP with similar models. The two high-resolution AGCMs do not improve the temperature field and cannot account for the discrepancy between model results and data, especially in winter. However, they are able to reproduce trends in precipitation more closely than their low-resolution counterparts do, but the simulated climates are still not as arid as depicted by the data. Conversely, the LAM temperature results compare well with climate reconstructions in winter but the simulated hydrological cycle is not consistent with the data. Finally, these results are discussed in regard of other possible causes for discrepancies between models and palaeoclimatic reconstructions for the LGM European climate. |