The purpose of the project DEKLIM-EEM is to reconstruct past interglacials based on proxy data and to understand the processes that are responsible for climatic changes during these interglacials by applying climate models.
The data represent monthly average value of a simulation of the preindustrial climate (PRI) at around 1800 yr AD. Boundary conditions are equivalent to the other simulations of the project, apart from the concentration of greenhouse gases and orbital parameters:
Greenhouse gas concentrations are derived from vostok ice core data: 280 ppmV CO2, 0.70 ppmV CH4 and 265 ppbV N2O. CFCs are set to zero.
Orbital parameters have been calculated with the routine of Berger (1978):
Eccentricity: 0.0167; Obliquity: 23.44; Perihelion: 282.7
The simulation has been started with the Levitus ocean climatology. ECHO-G is used as climate model. It is a coupled atmosphere/ocean model (ECHAM4_T30 + HOPE-E_T42er). The simulation was run on a NEC-SX6 (hurrikan). Atmospheric data were originally stored by the model every 12 hours. Ocean data is stored every month. As the boundary conditions are not time dependent, the time access is arbitrary.
- ECHOG_A16_LIG control run, last interglacial (Eemian, 125 kyrBP,
DEKLIM-EEM project), started with Levitus climatology, monthly mean values
- ECHOG_A40_LGI: control run, last glacial inception (End of the Eemian,
115 kyrBP, DEKLIM-EEM project), started with Levitus climatology, monthly