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 a lot of simulations used in this paper because we used an ensemble physics approach. So there is a mixture of these, plus special simulations
You can have make you own analysis and plots by going here
| Simulation Name as in Paper | Simulation name on web pages |
|---|---|
| 0ka | xnuzu |
| 0ka* | xnuzw |
| 6ka | xoary |
| 6kaGS | xnuzy |
| 6kaPD_GS_1 | xoarv |
| 6kaPD_GS_2 | xoaru |
| 6kaGS* | xoarf |
| 0ka(DG83-dust) | xnvbe |
| 6kaGS(DG83-dust) | xnvbg |
| 0ka(DG83<1um-dust) | xoard |
| 6ka(DG83<1um-dust) | xoarz |
| 6kaGS(DG83<1um-dust) | xoarf |
| 6kaGS_PD(DG83<1um-dust) | xoarr |
This paper reports HadGEM2-ES atmosphere-only simulations of the pre-industrialand mid-Holocene (6ka) with and without (*) the radiative effects of mineral dust and including 2 alternative formulations of the model in which the optical properties are changed to Deepak & Gerber, 1983 values (DG83) and the size range is restricted to a maximum of 1um with DG83 optical propreties. Simulations are also run for the mid-Holocene with a fully vegetation Sahara (GS).
| Name | Hopcroft and Valdes |
|---|---|
| Brief Description | This paper reports HadGEM2-ES atmosphere-only simulations of the pre-industrialand mid-Holocene (6ka) with and without (*) the radiative effects of mineral dust and including 2 alternative formulations of the model in which the optical properties are changed to Deepak & Gerber, 1983 values (DG83) and the size range is restricted to a maximum of 1um with DG83 optical propreties. Simulations are also run for the mid-Holocene with a fully vegetation Sahara (GS). |
| Full Author List | Peter O. Hopcroft and Paul J. Valdes |
| Title | On the role of dust-climate feedbacks during the mid-Holocene |
| Year | 2019 |
| Journal | Geophysical Research Letters |
| Volume | |
| Issue | |
| Pages | |
| DOI | 10.1029/2018GL080483. |
| Contact's Name | Peter O. Hopcroft |
| Contact's email | p.hopcroft@bham.ac.uk |
| Abstract | A reduction in dust over North Africa during the mid-Holocene 'Green Sahara' period could have amplified precipitation, helping reconcile climate model simulations with paleo-precipitation reconstructions. Here we test this using general circulation model simulations including interactive dust. We calculate a dust-precipitation amplification factor using three different dust configurations to evaluate the sensitivity to dust optical properties and particle size range. The resultant amplification ranges from a 20 % to 50 %. With more absorbing dust properties, there is a large negative net radiative effect and hence a larger impact on the hydrological cycle. With the inclusion of particles greater than 1um in radius, the precipitation amplification is reversed. Based on the simulations which best match observed Saharan dust properties, we conclude that there was a limited enhancement of precipitation due to reduced dust during the mid-Holocene, meaning other aspects of the climate system should be the focus of future research. |