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AERMET PROCESSING VERIFICATION REPORT -- KMEM (MEMPHIS INTERNATIONAL AIRPORT)
Period 2021-2025   |   Generated 2026-07-26 17:15:49
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OVERALL RESULT: PROCESSED SUCCESSFULLY -- ALL QUARTERS MEET THE EPA CRITERION

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

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1. STATION
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   Surface station      KMEM  MEMPHIS INTERNATIONAL AIRPORT, TN
   ICAO / WBAN / USAF   KMEM / 13893 / 723340
   GHCNh station ID     USW00013893
   Latitude, longitude  35.0560 N, 89.9860 W
   Elevation            76.6 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    USM00072340  LITTLE ROCK/ADAMS FLD; AR.
   Latitude, longitude  34.8350 N, 92.2594 W
   Elevation            173.2 m MSL
   Separation           209 km W of KMEM

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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     35.056389, -89.986389  (NAD83)
   Surface moisture     Average;  Arid: N
   Continuous snow      N
   Non-airport sectors  1
   Sectors              2
      sector 1: 220.0 to  350.0 degrees
      sector 2: 350.0 to  220.0 degrees

   Monthly surface characteristics applied by AERMET:

      Month  Sector   Albedo   Bowen ratio   Roughness z0 (m)
      -----  ------   ------   -----------   ----------------
          1       1     0.18          1.03              0.068
          2       1     0.18          1.03              0.068
          3       1     0.17          0.77              0.086
          4       1     0.17          0.77              0.086
          5       1     0.17          0.84              0.101
          6       1     0.17          0.84              0.101
          7       1     0.17          0.84              0.101
          8       1     0.17          0.84              0.101
          9       1     0.17          0.84              0.101
         10       1     0.17          1.03              0.086
         11       1     0.17          1.03              0.086
         12       1     0.18          1.03              0.068
          1       2     0.18          1.03              0.032
          2       2     0.18          1.03              0.032
          3       2     0.17          0.77              0.038
          4       2     0.17          0.77              0.038
          5       2     0.17          0.84              0.042
          6       2     0.17          0.84              0.042
          7       2     0.17          0.84              0.042
          8       2     0.17          0.84              0.042
          9       2     0.17          0.84              0.042
         10       2     0.17          1.03              0.038
         11       2     0.17          1.03              0.038
         12       2     0.18          1.03              0.032

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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            68369
   Rejected, NCEI suspect/erroneous 404
   Rejected, METAR cross-check      0
   Full detail                      KMEM_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 751 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 74 | Variable winds 22 | Cloud subs 0 | Temp subs 0
      Errors 0 | Warnings 362
   Year 2022
      Upper air soundings 746 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 21 | Variable winds 8 | Cloud subs 0 | Temp subs 0
      Errors 0 | Warnings 347
   Year 2023
      Upper air soundings 732 | Surface obs 8784 | 1-min ASOS hrs 8784
      Calms 113 | Variable winds 42 | Cloud subs 0 | Temp subs 0
      Errors 0 | Warnings 354
   Year 2024
      Upper air soundings 745 | Surface obs 8807 | 1-min ASOS hrs 8808
      Calms 163 | Variable winds 14 | Cloud subs 1 | Temp subs 2
      Errors 0 | Warnings 359
   Year 2025
      Upper air soundings 721 | Surface obs 8648 | 1-min ASOS hrs 8760
      Calms 135 | Variable winds 27 | Cloud subs 16 | Temp subs 16
      Errors 0 | Warnings 347

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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    99.6%    99.5%    99.9%    99.8%      99.7%   PASS
      2022    99.9%   100.0%    99.8%   100.0%      99.9%   PASS
      2023    99.8%    98.7%    99.6%   100.0%      99.5%   PASS
      2024    99.9%   100.0%    99.9%    99.6%      99.8%   PASS
      2025    99.7%    99.6%    95.7%    99.4%      98.6%   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     12.7 m/s   -17.2 C    35.7 C           0                0
      2022     12.3 m/s   -17.2 C    38.9 C           0                0
      2023     16.3 m/s    -3.9 C    38.2 C           0                0
      2024     12.0 m/s   -16.1 C    37.2 C           0                0
      2025     14.7 m/s   -11.8 C    37.8 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         74            26        8734
      2022         21             8        8752
      2023        113            43        8717
      2024        160            14        8770
      2025        135           124        8636

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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
      --------------------   ---------   -----   --------------------------------
      KMEM2021.sfc                1.47    8784   1b642efbc88b22f2dbe589d1a98d0f26
      KMEM2021.pfl                0.57       -   c53cc48cfc7b72f99e55bcfd8c26799f
      KMEM2021US.sfc              1.47    8784   c33500ef100f7ed18dbbf50a44b95dab
      KMEM2021US.pfl              0.57       -   c53cc48cfc7b72f99e55bcfd8c26799f
      KMEM2022.sfc                1.47    8784   11fc01bc90c5c2abfdd7dd136933772f
      KMEM2022.pfl                0.57       -   7e87fb3e193d37be87ea8ad8b7d56a00
      KMEM2022US.sfc              1.47    8784   9fb3f4b8ae1ec2f6140b0268d64545ca
      KMEM2022US.pfl              0.57       -   7e87fb3e193d37be87ea8ad8b7d56a00
      KMEM2023.sfc                1.47    8784   1e8bedb714b4d7a7d34df4010b83b7e0
      KMEM2023.pfl                0.57       -   0920f152ad1c22ae49fc2cf52f6e13a6
      KMEM2023US.sfc              1.47    8784   93c137b6347027ba2db10eecab60e535
      KMEM2023US.pfl              0.57       -   0920f152ad1c22ae49fc2cf52f6e13a6
      KMEM2024.sfc                1.48    8808   6bb06089b180678f5e4181d2eee923bf
      KMEM2024.pfl                0.57       -   7133f330be344f05c5ae9656cdedd28a
      KMEM2024US.sfc              1.48    8808   ee79e20c5bf7d3ad9f8aa94cee1ca30a
      KMEM2024US.pfl              0.57       -   7133f330be344f05c5ae9656cdedd28a
      KMEM2025.sfc                1.47    8784   27a09159ded348e5593a0aae29ce6d11
      KMEM2025.pfl                0.57       -   079c5da1c4b05414cbebe1f77bf9d4d8
      KMEM2025US.sfc              1.47    8784   ffa300caf344db64aaf0d41d82c03339
      KMEM2025US.pfl              0.57       -   079c5da1c4b05414cbebe1f77bf9d4d8

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End of report -- KMEM 2021-2025
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