The spectra_clima.f and spectra_photo.f files are auxiliary to bin a high resolution spectrum and create an input that can be read for the climate or photochemical code. BEFORE USING 1. Change the parameters so they are the correct ones to read the stellar flux file. 2. Change the names of the files so they agree with your new stellar flux file and data. 3. On the loop where the stellar flux file is read, check that the unit conversion is the right for your file. TO COMPILE Write: f77 spectra_clima.f TO RUN Write: ./a.out IMPORTANT NOTES: 1. The climate model for low CO2 atmospheres has 16 stellar flux intervals in the near UV. The high CO2 version of the climate code DOES NOT have these 16 intervals. If you are using this version you need to delete the 16 intervals in the file that spectra_clima.f is going to create as input of the model. 2. For the photochemical model you need to write the Lyman alpha flux of the star you are using. The program is not coded to calculate this flux from the high resolution spectrum, instead the variable xLy is in the code to include the Lyman alpha flux of a particular star. January, 2009. Antígona Segura