﻿Please note: More model evaluation results will be provided at a later date.

HYBRID_2014NATA_Evaluation_Raio_Boxplots.png  and NON_2014HYBRID_NATA_Evaluation_Ratio_Boxplots.png
   shows ratio of modeled-to-observed  for HYBRID pollutants (CMAQ+AERMOD) and NON-HYBRID (AERMOD-only) pollutants, respectively
   (all data used in the plots are in mod_eval_data_formatted.csv)
   

Pollutant names along with sampling time are provided.   
   Some with CMAQ abbreviations as names are spelled out here:
    CL2_ME =  Methylene chloride (Dichloromethane)
    CL4_ETHE = Tetrachloroethylene (Perchloroethylene)
    CHCL3 = Chloroform
    TOLU = toluene
    CL2_C2_12 = Ethylene dichloride (1,2‑Dichloroethane)
    FORM = formaldehyde
    ALD2 = acetaldehyde
    CL3_ETHE = Trichloroethylene
    CR_VI = hexavalent chromium
    CL_ETHE =   Vinyl chloride  
    CL4_ETHANE1122= 1,1,2,2-Tetrachloroethane
    BR2_C2_12 = Ethylene dibromide (1,2-Dibromoethane)

mod_eval_data_formatted.csv 
      contains 2014 modeled concentrations at monitoring locations and monitored concentrations at those locations in micrograms per meter cubed
      Pollutant names and whether concentration is based on observed or modeled value are in top row
	 -999  means no data
      All observed values are medians of year 2014 daily concentrations computed by Regression on Order Statistics; 
      For some pollutants, the observed values represent the sum of multiple annual medians (e.g., median of o-xylene + median of m/p-xylene = total xylene) 
      Observed concentrations PAH groups also are summed.
      Values of 0 (non-detect) are treated as censored
      - for monitors with non-detects, the median is computed using regression on order statistics (ROS) by using the minimum non-zero measurement as the detection limit.
      This minimum may still be below the minimum detection limit (MDL).
      All data below MDL are used to compute the statistics.

xylenes_add_O_MP.xlsx
   shows how sum of O-xylene and M/P-xylene (or O+M+P) was computed by site

pahs_sums_for_model_evaluation.xlsx
    shows how sum of various PAH groups was computed by site

annualstatistics_phase12archive_2014
   Annual statistics for year 2014 showing number of days monitored, count and percent of non-detects and data below MDL for each site
   These monitored values (median based on ROS)  were used for the observed values in cmaq_mod_eval_3aug, though some median values were summed first as explained above.