contact  |  support  |  links
Experiment 1: fossil case
Input is Fung's gridded fossil source interpolated to model grid. The time invariant source is input to the lowest model layer. The input file may be found in the t1.input.tar.z file downloaded above and is called co2ems.dat. It is described in the file . Note that the units of the sources are grams/m2/year.
The model should be run for at least four years with data collected from the fourth year or later.
Required output
Returned data should be in four parts; description, sources, plan fields and cross-sections.
The description should include a brief description of the model used including details such as resolution and any particular features which may strongly impact tracer transport performance. Examples would include explicit boundary layer formulation, Lagrangian transport etc. The description should also include any variation from the experimental protocol used by the particular group. This would include aspects such as multi-year averages in the output etc. Finally the normalization used for both experiments should be included. This is the average mixing ratio through the whole atmosphere for the month of January for the supplied year.
The returned sources should be those actually seen by the model. Note that in a spectral model this means they will be smoother than gridded fields at the resolution implied by the model grid. The format of the files for this field is described under data formats.
The units for the sources should be grams of carbon (not CO2)/m2/second.
The plan fields consist of gridded fields for monthly mean mixing ratio at the surface, 500hPa and 200hPa (36 datasets in all). The surface should generally be taken as the lowest model level unless an explicit boundary layer formulation allows boundary layer values to be returned. The free atmosphere levels should be interpolated from the models' vertical coordinates to pressure surfaces and the special value 99999.9 should be used where topography interrupts the pressure surface. The horizontal grid of the provided model output should be at least regular in longitude and, where possible, should be the grid used by the model.
The data should be normalized by subtracting the monthly mean, global mean mixing ratio for January. This normalization is to correct for drift in mixing ratio due to slightly different source strengths, different starting and archiving times and differences in mass conservation.
Cross-sections should consist of monthly mean zonal mean mixing ratio at each model level. These data should be normalized in the same way as the plan fields.
site design by Micek Design
All Images on this Website are the property of the stock.xchng, all rights reserved.
Copyright 2011, Arizona State University all rights reserved.