Ozone Climatology From WOUDC Ozonesondes - Guide ================================================ Tropospheric Climatology (no data originating above tropopause) --------------------------------------------------------------- TROPOSPHERIC_OZONE_MAPS DECADAL DATA (decadal averages, by month and season) GROUND_LEVEL DECADE MONTH MEAN_OZONE_VALUE - Plots of mean values of ozone at 1-km intervals above ground level using forward and backward trajectories. MEAN_OZONE_VALUE_SMOOTHED - Smoothed plots of mean values of ozone at 1-km intervals above ground level using forward and backward trajectories NUMBER_OF_SAMPLES_IN_PARCEL - Plots of the number of data points in an average value at 1-km intervals STANDARD_DEVIATION - Plots of the standard deviation of the samples ERROR_OF_MEAN - Plots of the standard error of the mean ERROR_OF_MEAN_PERCENT - Plots of the std error of the mean/mean in % STANDARD_DEV_MEAN_RATIO - Plots of the standard deviation/mean ratio SEA_LEVEL MONTH MEAN_OZONE_VALUE (Same plots as the GROUND_LEVEL folder but calculated for 1-km intervals above sea level) MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO o3_woudcyyyys-mm_[gl/sl]_trop_zboth_mean_Lxx : mean ozone values o3_woudcyyyys-mm_[gl/sl]_trop_zboth_smooth_Lxx: smoothed mean ozone values o3_woudcyyyys-mm_[gl/sl]_trop_zboth_number_Lxx: number of data points in each mean value o3_woudcyyyys-mm_[gl/sl]_trop_zboth_sigma_Lxx: standard deviation of data points in each o3_woudcyyyys-mm_[gl/sl]_trop_zboth_sigma_error_Lxx: standard error of the mean o3_woudcyyyys-mm_[gl/sl]_trop_zboth_sigma_error_percent_Lxx: (error of mean)/mean (%) o3_woudcyyyys-mm_[gl/sl]_trop_zboth_sigma_ratio_Lxx: ratio sigma/mean where yyyys is decade, mm is month, sl = from sea level, gl = from ground level, and xx is level number, with 01 corresponding to the 0-1 km layer. ANNUAL (annual averages) GROUND_LEVEL YEAR MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO SEA_LEVEL YEAR MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO o3_woudcyyyy_[gl/sl]_trop_zboth_mean_Lxx : mean ozone values o3_woudcyyyy_[gl/sl]_trop_zboth_smooth_Lxx: smoothed mean ozone values o3_woudcyyyy_[gl/sl]_trop_zboth_number_Lxx: number of data points in each mean value o3_woudcyyyy_[gl/sl]_trop_zboth_sigma_Lxx: standard deviation of data points in each o3_woudcyyyy_[gl/sl]_trop_zboth_sigma_error_Lxx: standard error of the mean o3_woudcyyyy_[gl/sl]_trop_zboth_sigma_error_percent_Lxx: (error of mean)/mean (%) o3_woudcyyyy_[gl/sl]_trop_zboth_sigma_ratio_Lxx: ratio sigma/mean where yyyy is year, sl = from sea level, gl = from ground level, and xx is level number, with 01 corresponding to the 0-1 km layer. MONTHLY (monthly averages, for each year) GROUND_LEVEL YEAR MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO SEA_LEVEL YEAR MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO o3_woudcyyyy-mm_[gl/sl]_trop_zboth_mean_Lxx : mean ozone values o3_woudcyyyy-mm_[gl/sl]_trop_zboth_smooth_Lxx: smoothed mean ozone values o3_woudcyyyy-mm_[gl/sl]_trop_zboth_number_Lxx: number of data points in each mean value o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_Lxx: standard deviation of data points in each o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_error_Lxx: standard error of the mean o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_error_percent_Lxx: (error of mean)/mean (%) o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_ratio_Lxx: ratio sigma/mean where yyyy is year, mm is month, sl = from sea level, gl = from ground level, and xx is level number, with 01 corresponding to the 0-1 km layer. Only in "Liu Tropospheric Climatology": DATA 1980-2008 GROUND_LEVEL MONTH MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO SEA_LEVEL DECADE MONTH MEAN_OZONE_VALUE MEAN_OZONE_VALUE_SMOOTHED NUMBER_OF_SAMPLES_IN_PARCEL STANDARD_DEVIATION ERROR_OF_MEAN ERROR_OF_MEAN_PERCENT STANDARD_DEV_MEAN_RATIO N.B. The "DATA 1980-2008" averages have a different naming convention. Files are named mm_xx_[variable].eps, where mmm is month and xx is level, with 00 corresponding to the 0-1 km layer. Note that bins are 3x5 (degrees lat-long) rather than 5x5. TROPOSPHERIC_OZONE_DATA (same structure) DECADAL DATA (decadal averages, by month and season) SEA_LEVEL DECADE MONTH o3_woudcyyyy-mm_[gl/sl]_trop_zboth_mean: mean ozone values o3_woudcyyyy-mm_[gl/sl]_trop_zboth_smooth: smoothed mean ozone values o3_woudcyyyy-mm_[gl/sl]_trop_zboth_number: number of data points in each mean value o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma: standard deviation of data points in each o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_error: standard error of the mean o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_error_percent: (error of mean)/mean (%) o3_woudcyyyy-mm_[gl/sl]_trop_zboth_sigma_ratio: ratio sigma/mean i.e. similar directory structure, without the last level of subdirectories. Data dimensions: 5 deg. (lon) X 5 deg. (lat) X 26 km (alt)=>72X36X26 Data units: ppbv Data format: ASCII Missing data: 0.0 Data structure: Each line contains 72+2 values. These are Altitude Level and Latitude Number, followed by 72 data values by 5 degree longitude at that latitude and altitude. e.g. The first line of "o3_ woudcyyyys-mm_sl_trop_zboth_mean.asc" reads: 1 1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 .... The first "1" means Level 1 (0-1 km); the second "1" means Latitude Number 1, or -87.5 degrees; the first "0.0" corresponds to Longitude Number 1, or -177.5 degrees, while the 72th "0.0" corresponds to Longitude Number 72, or 177.5 degrees. Col-1, Col-2, Col-3 ...Col72+2 Alt-1, Lat-1, Lon-1 ...Lon-72 Alt-1, Lat-2, Lon-1 ...Lon-72 Alt-1, Lat-3, Lon-1 ...Lon-72 ... Alt-26, Lat-1, Lon-1 ...Lon-72 ... Alt-26, Lat-36, Lon-1 ...Lon-72 Lat 1 to Lat 36: -87.5 to 87.5 Lon 1 to Lon 72: -177.5 to 177.5 Stratospheric Climatology (no data originating below tropopause) STRATOSPHERIC_OZONE_MAPS STRATOSPHERIC_OZONE_MAPS Otherwise same structure Filenames: o3_woudcyyyys-mm_[gl/sl]_strat_zboth_mean, etc. TROP_STRAT Climatology (full profile) ------------------------------------- OZONE_MAPS OZONE_MAPS Otherwise same structure Filenames: o3_woudcyyyys-mm_[gl/sl]_trop_strat_zboth_mean, etc. N.B. In "Liu Tropospheric Climatology", the "DATA 1980-2008" averages have a different data file structure, but the data files contain a header line that explains the structure. Note that bins are 3x5 (degrees lat-long) rather than 5x5. Files are named mm_xx.dat, where mmm is month and xx is level, with 00 corresponding to the 0-1 km layer.