ISLSCP II Atmospheric Carbon Dioxide Consumption by Continental Erosion 
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File Name Convention
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The files in this data set are named as shown below:

A) Continental Flux 
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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.

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ASCII File Format
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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.