Idealized single-forcing GCM simulations with GFDL CM2.1: daily data

This repository contains daily model output from experiments run using the Geophysical Fluid Dynamics Laboratory (GFDL) Climate Model 2.1 (CM2.1), a coupled atmosphere-ocean general circulation model. The experiments were designed to isolate the effect of a single orbital forcing on climate by changing one forcing while holding all others to preindustrial levels. The seven single-forcing idealized equilibrium simulations comprised low and high obliquity experiments in which obliquity was set to the extremes of the past 600 ky, four precession experiments representing equally spaced phases of the precession cycle, and an experiment in which eccentricity was set to 0. A preindustrial experiment was run with all forcings set to preindustrial values. Simulations were run for at least 500 years and these files contain 100 years of daily output.

Provided here are daily output of geopotential height at 500 hPa (hght.500) and daily maximum and minimum temperature at a reference height of 2m (t_ref_max and t_ref_min, respectively).

Preindustrial experiment values (and values of forcings set to preindustrial in other experiments):
 - Obliquity: 23.439°
 - Longitude of perihelion: 102.93°
 - Eccentricity: 0.0167
 - CO2: 286 ppm
 - Ice sheets: 0 ka BP

Low and high obliquity experiments (lo_obliq & hi_obliq):
- Low obliquity: 22.079°
- High obliquity: 24.480
- All else preindustrial

Precession experiments (0_AEQ, 90_WSOL, 180_VEQ, & 270_SSOL):
- 0_AEQ longitude of perihelion: 0° (NH autumnal equinox)
- 90_WSOL longitude of perihelion: 90° (NH winter solstice)
- 180_VEQ longitude of perihelion: 180° (NH vernal equinox)
- 270_SSOL longitude of perihelion: 270° (NH summer solstice)
- Eccentricity: 0.0493
- All else preindustrial

0 eccentricity experiment:
- Eccentricity: 0
- Longitude of perihelion: N/A
- All else preindustrial

The experiments were run by Michael Erb and climatological data for these variables and more are available here: http://doi.org/10.5281/zenodo.1194480.

Contact:
Grainne O’Neill [e-mail]