ISLSCP II Atmospheric Carbon Dioxide Consumption by Continental Erosion ############################################################################## File Name Convention -------------------- The files in this data set are named as shown below: A) Continental Flux ----------------------------- The continental flux data represent gridded estimates for the consumption if atmospheric CO2 by continental erosion based on empirical models. File Name Description --------- ----------- cont_flux_co2rw_XX_map.asc: bicarbonate export (atmospheric origin), also called "atmospheric CO2 consumption by rock weathering." cont_flux_doc_XX_map.asc dissolved organic carbon (DOC) export cont_flux_hco3_XX_map.asc bicarbonate export cont_flux_poc_XX_map.asc particulate organic carbon (POC) export cont_flux_tss_XX_map.asc sediment export cont_flux_hd_changemap.asc: gridded ASCII map showing the differences between the ISLSCP II land/water mask and the original data set: All points with negative values ("-1") were removed. All points with a value of zero were unchanged, and all points with postivie values were filled in using interpolation (see Sections 8.4 and 9.2.3 of documentation). cont_flux_xxxxx_hd_map.dif : ASCII table "difference" files (with an extension of ".dif") from each xxxxx-type map above that hold all the points that did not match the ISLSCP II land/water mask, and were removed or added (see Sections 8.4 and 9.2.3 of documentation). Here "XX" identifies the spatial resolution of the data set, where hd and 1d stand for a spatial resolution of 0.5 and 1.0 degrees in both latitude and longitude, respectively. The original spatial resolution of this data set is 0.5 degrees. In addition, the authors have provided graphical versions of their 0.5 degree resolution data for visualization purposes of oceanic flux. There are 11 GIF format files with located in the 0_figures directory. An additional file showing the flow directions used in the river routing is also provided (flow_dir.gif file). All of these files can be viewed with most standard image display programs. ############################################################################## ASCII File Format ----------------- All of the data files in the ISLSCP Initiative II data collection are in the ASCII, or text format. The map file format consists of numerical fields of varying length, which are delimited by a single space and arranged in columns and rows. The map files at different spatial resolutions each contain the following numbers of column and rows: One degree: 360 columns by 180 rows 1/2 degree: 720 columns by 360 rows All files are gridded to a common equal-angle lat/long grid, where the coordinates of the upper left corner of the files are located at 180 degrees W, 90 degrees N and the lower right corner coordinates are located at 180 degrees E, 90 degrees S. Data in the map files are ordered from North to South and from West to East beginning at 180 degrees West and 90 degrees North.