emits the header line for any wide-per-layer carbon file. id columns + depth_lyr1..depth_lyrN + for each var_name: _lyr1.._lyrN caller already wrote the banner row; this writes the column-label row.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| integer, | intent(in) | :: | unit_no | |||
| character(len=*), | intent(in) | :: | var_names(:) | |||
| logical, | intent(in) | :: | is_csv |