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AERMET PROCESSING VERIFICATION REPORT -- KCBM (COLUMBUS AFB AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:03:01
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OVERALL RESULT: PROCESSED SUCCESSFULLY -- SOME QUARTERS BELOW THE EPA CRITERION

   Processing              PASS
      AERMET errors                    : 0
      Non-physical values in .sfc      : 0
   Data completeness       SEE NOTE
      Quarters meeting EPA 90% criterion: 18 of 20

   Note: 2 quarter(s) fall below the 90% criterion.  This reflects gaps in
   the source observation archive, not an error in processing.  Review those
   periods when selecting a station and period for a regulatory application and
   consider substitute years, consistent with Appendix W and regional guidance.

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1. STATION
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   Surface station      KCBM  COLUMBUS AFB AIRPORT, MS
   ICAO / WBAN / USAF   KCBM / 13825 / 723306
   GHCNh station ID     USW00013825
   Latitude, longitude  33.6500 N, 88.4500 W
   Elevation            66.8 m MSL
   Wind reference ht    10.0 m   (AERMOD .sfc column 18)
   Temp reference ht    2.0 m   (AERMOD .sfc column 20)

   Upper air station    USM00072235  JACKSON/ALLEN C. THOMPSON FIE
   Latitude, longitude  32.3189 N, 90.0800 W
   Elevation            90.7 m MSL
   Separation           212 km SW of KCBM

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2. SOFTWARE AND INPUT DATA
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   AERMET               26135
   AERMINUTE            26135
   AERSURFACE           26135
   Surface data         NCEI GHCNh hourly (replaces the discontinued ISHD)
   1-minute winds       NCEI ASOS 1-minute and 5-minute, hourly-averaged by
                        AERMINUTE and merged by AERMET
   Upper air            NCEI IGRA v2 radiosonde soundings

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3. SURFACE CHARACTERISTICS (AERSURFACE)
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   Land cover           NLCD 2021 (with impervious and canopy)
   Roughness method     ZORAD, 1000.0 m radius, monthly resolution
   Site coordinates     33.650000, -88.450000  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  None
   Sectors              1
      sector 1:   0.0 to  360.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.15          0.37              0.018
          2       1     0.15          0.37              0.018
          3       1     0.14          0.28              0.024
          4       1     0.14          0.28              0.024
          5       1     0.14          0.28              0.024
          6       1     0.15          0.30              0.030
          7       1     0.15          0.30              0.030
          8       1     0.15          0.30              0.030
          9       1     0.15          0.30              0.030
         10       1     0.15          0.37              0.025
         11       1     0.15          0.37              0.025
         12       1     0.15          0.37              0.018

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4. SURFACE DATA QUALITY CONTROL
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   NCEI flags each observation with a quality code that AERMET does not act
   on, so the GHCNh file is screened before processing.  Rejected values are
   blanked (treated as missing); no record is dropped and no value is altered.

   Observations screened            81002
   Rejected, NCEI suspect/erroneous 8621
   Rejected, METAR cross-check      0
   Full detail                      KCBM_GHCNh_2021_2025_qc_log.txt

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5. ANNUAL PROCESSING STATISTICS (from AERMET .RP2)
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   Year 2021
      Upper air soundings 743 | Surface obs 8655 | 1-min ASOS hrs 0
      Calms 3589 | Variable winds 6 | Cloud subs 12 | Temp subs 4
      Errors 0 | Warnings 359
   Year 2022
      Upper air soundings 774 | Surface obs 8697 | 1-min ASOS hrs 0
      Calms 2384 | Variable winds 4 | Cloud subs 23 | Temp subs 2
      Errors 0 | Warnings 357
   Year 2023
      Upper air soundings 758 | Surface obs 8638 | 1-min ASOS hrs 0
      Calms 2574 | Variable winds 5 | Cloud subs 9 | Temp subs 27
      Errors 0 | Warnings 359
   Year 2024
      Upper air soundings 754 | Surface obs 8596 | 1-min ASOS hrs 0
      Calms 2402 | Variable winds 4 | Cloud subs 15 | Temp subs 3
      Errors 0 | Warnings 358
   Year 2025
      Upper air soundings 738 | Surface obs 8444 | 1-min ASOS hrs 0
      Calms 2514 | Variable winds 15 | Cloud subs 12 | Temp subs 4
      Errors 0 | Warnings 356

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6. DATA COMPLETENESS
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   EPA requires at least 90% valid data per calendar quarter.  The quarterly
   columns are the compliance test; the annual column is informational.

      Year       Q1       Q2       Q3       Q4     Annual   Result
      ----   ------   ------   ------   ------   --------   ------
      2021    96.5%    96.6%    98.6%    99.2%      97.7%   PASS
      2022    98.8%    99.5%    99.0%    98.0%      98.8%   PASS
      2023    93.2%    70.8%    78.7%    98.1%      85.2%   FAIL
      2024    97.2%    97.2%    96.5%    98.6%      97.4%   PASS
      2025    97.5%    98.2%    91.0%    98.1%      96.2%   PASS

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7. PHYSICAL PLAUSIBILITY OF THE DELIVERED FILES
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   Screening of the .sfc files as delivered.  Wind speeds above 25 m/s and
   temperatures outside -25 to +45 C are reported for review; a non-zero count
   does not by itself mean the data are wrong, but each should be explainable.

      Year   Max wind   Min temp   Max temp   ws>25 m/s   T out of range
      ----   --------   --------   --------   ---------   --------------
      2021     13.4 m/s   -11.9 C    35.2 C           0                0
      2022     14.9 m/s   -14.3 C    38.2 C           0                0
      2023     13.4 m/s    -8.5 C    38.0 C           0                0
      2024     13.9 m/s   -13.8 C    38.5 C           0                0
      2025     22.1 m/s   -13.6 C    37.2 C           0                0

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8. CALMS AND MISSING DATA
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   AERMOD excludes calm hours (wind speed below the 0.5 m/s threshold) and
   missing hours from the averaging period, and reports both in its own output.
   They are counted here so the modeller can anticipate them.

      Year   Calm hrs   Missing hrs   Valid hrs
      ----   --------   -----------   ---------
      2021       3590           199        8561
      2022       2382           104        8656
      2023       2572          1295        7465
      2024       2401           230        8554
      2025       2514           333        8427

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9. OUTPUT FILES
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   Files without the US suffix were processed WITHOUT the ADJ_U* option; files
   with the US suffix were processed with METHOD STABLEBL ADJ_U*.  Use one set
   or the other consistently -- do not mix them within a single AERMOD run.

      File                    Size (MB)   Hours   MD5
      --------------------   ---------   -----   --------------------------------
      KCBM2021.sfc                1.47    8784   e22cb20944fdac3fa927ca4b4e49a815
      KCBM2021.pfl                0.57       -   2b5ece43074c35384399626ed65e7a00
      KCBM2021US.sfc              1.47    8784   01a9dd955dafd3d20fa25feef8feb928
      KCBM2021US.pfl              0.57       -   2b5ece43074c35384399626ed65e7a00
      KCBM2022.sfc                1.47    8784   4e5c1dde889d1f37146dfeba96649a9a
      KCBM2022.pfl                0.57       -   4d182fa1f5e423485bdb460102b340b3
      KCBM2022US.sfc              1.47    8784   04a6a190331df6df39e0b5d0dfd82bdf
      KCBM2022US.pfl              0.57       -   4d182fa1f5e423485bdb460102b340b3
      KCBM2023.sfc                1.47    8784   5a8f4d5f2f6ef0f07ac658dc5fcfa120
      KCBM2023.pfl                0.57       -   7dac137a41a7e9e82c8b00a10f04f3ac
      KCBM2023US.sfc              1.47    8784   e172a6d223feef7aa3556e2bc86142a0
      KCBM2023US.pfl              0.57       -   7dac137a41a7e9e82c8b00a10f04f3ac
      KCBM2024.sfc                1.48    8808   6b97fbe6d45b96cbc458e5eddbaf9d38
      KCBM2024.pfl                0.57       -   a4b79edaa7d0445551a8f9df0610d5bf
      KCBM2024US.sfc              1.48    8808   f0a8c826ba280f758a7015f18a95fc85
      KCBM2024US.pfl              0.57       -   a4b79edaa7d0445551a8f9df0610d5bf
      KCBM2025.sfc                1.47    8784   ae76fc294edd298e63aae628756f3455
      KCBM2025.pfl                0.57       -   6cff93b089ded32777f6d673a8cec6c2
      KCBM2025US.sfc              1.47    8784   127ef0a1d6770f99c2b674427eeaf7e4
      KCBM2025US.pfl              0.57       -   6cff93b089ded32777f6d673a8cec6c2

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End of report -- KCBM 2021-2025
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