Issue with MERRA-2 ARL files
Posted: January 22nd, 2021, 6:36 pm
I'm currently experiencing some issues with the data I obtained using the MER2ALR converter. The files converted without apparent issues, but the trajectories I obtain using those files don't agree at all (they are actually almost opposite) with the ones obtained using GFS or GDAS. For example:
MERRA-2-based trajectory
GFS-based trajectory
I've retrieved a met profile for a specific location from the MERRA-2 and GFS ARL datasets using the tools provided by HYSPLIT and I've noticed that the leftmost column of the two files are quite different. The profile derived from the GFS files has monotonically decreasing numbers (similar to pressure), while the one from MERRA-2 starts fine but at 675 starts to behave somewhat erratically. I'm not sure about the exact meaning of that leftmost column, but could this be a symptom of the issue I'm experiencing?
MERRA-2 ARL profile
GFS profile
Any comments would be greatly appreciated!
Fernando
MERRA-2-based trajectory
Code: Select all
1 1
MER2 19 9 23 1 0
1 BACKWARD OMEGA
19 9 23 20 16.600 -100.000 26000.0
1 PRESSURE
1 1 19 9 23 20 0 0 0.0 16.600 -100.000 26000.0 30.4
1 1 19 9 23 19 0 0 -1.0 15.943 -100.512 26036.2 30.1
1 1 19 9 23 18 0 0 -2.0 15.334 -100.948 26036.9 29.7
1 1 19 9 23 17 0 0 -3.0 14.782 -101.310 26036.5 29.4
1 1 19 9 23 16 0 0 -4.0 14.295 -101.616 26035.1 29.2
1 1 19 9 23 15 0 0 -5.0 13.923 -101.930 26033.4 29.3
1 1 19 9 23 14 0 0 -6.0 13.667 -102.260 26031.6 29.3
1 1 19 9 23 13 0 0 -7.0 13.521 -102.603 26029.6 29.4
1 1 19 9 23 12 0 0 -8.0 13.453 -103.009 26028.5 29.8
1 1 19 9 23 11 0 0 -9.0 13.464 -103.472 26028.4 30.0
1 1 19 9 23 10 0 0 -10.0 13.553 -103.983 26029.6 30.2
1 1 19 9 23 9 0 0 -11.0 13.672 -104.562 26031.7 30.3
1 1 19 9 23 8 0 0 -12.0 13.826 -105.202 26034.7 30.3
GFS-based trajectory
Code: Select all
1 1
GFSQ 19 9 23 0 0
1 BACKWARD OMEGA
19 9 23 20 16.600 -100.000 26000.0
1 PRESSURE
1 1 19 9 23 20 0 2 0.0 16.600 -100.000 26000.0 20.9
1 1 19 9 23 19 0 1 -1.0 16.687 -99.168 25967.4 20.7
1 1 19 9 23 18 0 0 -2.0 16.758 -98.351 25815.7 20.2
1 1 19 9 23 17 0 1 -3.0 16.809 -97.428 25242.3 18.2
1 1 19 9 23 16 0 2 -4.0 16.830 -96.402 25279.3 17.9
1 1 19 9 23 15 0 3 -5.0 16.839 -95.365 25921.9 19.1
1 1 19 9 23 14 0 2 -6.0 16.899 -94.378 26018.6 18.4
1 1 19 9 23 13 0 1 -7.0 17.031 -93.393 26179.6 18.3
1 1 19 9 23 12 0 0 -8.0 17.192 -92.433 26057.6 17.7
1 1 19 9 23 11 0 1 -9.0 17.322 -91.552 26436.1 18.8
1 1 19 9 23 10 0 2 -10.0 17.363 -90.700 26582.5 18.8
1 1 19 9 23 9 0 3 -11.0 17.365 -89.813 26490.2 18.5
1 1 19 9 23 8 0 2 -12.0 17.376 -88.896 26638.8 18.6
MERRA-2 ARL profile
Code: Select all
METEOROLOGICAL PROFILE LISTING ...
Meteorological Profile: MERRA2_20190923.ARL
File start time : 19 9 23 1 30
File ending time: 19 9 23 22 30
___________________________________________________
Profile Time: 19 9 23 1 30
Used Nearest Grid Point ( 417, 214) to Lat: 16.67, Lon: -100.00
2D Fields
SHGT PRSS PRT3 PBLH USTR RGHS DSWF SHTF LHTF T02M U10M V10M WDIR WSPD
m hPa mm/h m cm/s m W/m2 W/m2 W/m2 oC m/s m/s deg m/s
1010 0 1010 0 809 15.3 0 0 0 128 29.0 3.1 2.6 230.9 4.1
3D Fields
PRES TEMP UWND VWND WWND SPHU TPOT WDIR WSPD
oC m/s m/s mb/h g/kg oK deg m/s
985 1005 28.4 3.6 2.8 -5.4 16.9 301.2 232.0 4.6
970 988 26.9 3.8 2.7 -5.2 16.5 301.1 234.7 4.7
955 972 25.6 4.0 2.6 -4.7 16.3 301.3 236.8 4.7
940 955 24.3 4.1 2.5 -3.9 16.2 301.4 238.5 4.8
925 941 23.2 4.2 2.0 -2.7 15.8 301.5 244.2 4.7
910 927 21.7 4.2 1.4 -0.74 15.4 301.4 251.1 4.4
895 911 21.0 3.9 0.76 -0.60 14.5 302.1 259.0 4.0
880 897 20.6 3.5 0.27 -0.49 13.7 303.1 265.5 3.5
865 880 20.2 2.8 0.44 0 13.4 304.2 261.0 2.8
850 866 19.5 1.9 0.79 -1.2 13.1 304.9 247.8 2.1
835 850 18.8 1.1 1.3 -2.0 13.2 305.8 219.8 1.7
820 836 17.9 0.26 2.0 -2.8 13.2 306.4 187.2 2.1
800 818 17.0 -0.60 2.7 -3.7 12.6 307.3 167.5 2.8
775 796 15.8 -1.8 3.3 -3.7 11.7 308.5 150.9 3.7
750 770 14.2 -3.2 2.8 -3.8 10.3 309.7 132.0 4.3
725 744 12.6 -4.5 2.4 -3.0 9.2 310.9 118.3 5.1
700 718 11.0 -5.1 1.4 -3.1 8.7 312.3 105.9 5.3
675 694 9.2 -5.1 1.0 -3.3 8.4 313.4 101.2 5.2
1142 663 6.8 -5.6 0.73 -3.6 8.1 314.9 97.4 5.6
600 624 4.3 -6.3 1E-1 -2.1 7.4 317.5 90.6 6.3
1067 585 1.7 -6.8 -0.46 -2.1 6.6 320.4 86.1 6.8
525 548 -1.1 -7.4 -1.1 -2.1 5.9 323.2 81.7 7.4
992 510 -3.9 -7.3 -1.6 0 5.2 326.5 77.8 7.5
450 472 -7.4 -7.8 -3.0 0 4.1 329.5 69.2 8.4
917 434 -10.8 -7.7 -2.9 1.4 3.2 333.1 69.4 8.3
375 396 -15.3 -8.0 -3.1 1.4 2.1 336.2 68.8 8.6
842 358 -20.8 -8.6 -4.1 1.3 0.78 338.6 64.6 9.5
369 314 -26.2 -3.4 0 1.5 0.62 344.0 90.0 3.4
1133 267 -35.3 -0.43 2.2 1.4 0.23 347.0 168.7 2.2
359 227 -45.3 -2.1 -1.5 3.6 0.13 348.3 53.3 2.6
1115 193 -54.7 -3.5 -3.4 2.4 5E-2 349.8 45.9 4.9
544 164 -63.1 -4.9 -2.1 0 3E-2 352.5 66.4 5.3
975 139 -69.9 -11.5 1.2 -1.1 1E-2 357.2 96.2 11.6
775 118 -77.2 -12.5 3.8 -0.17 5E-3 360.9 106.7 13.1
462 101 -79.4 -13.7 2.4 0.48 4E-3 373.8 99.9 13.9
595 85.4 -78.0 -15.2 1.4 0.30 3E-3 394.3 95.1 15.2
675 72.6 -74.8 -13.8 -0.96 0.18 3E-3 420.1 86.0 13.8
448 61.5 -69.8 -12.7 1E-1 0.22 3E-3 451.4 90.3 12.7
697 52.0 -66.8 -12.1 1.4 4E-2 3E-3 480.7 96.6 12.2
217 43.9 -65.5 -11.5 -0.15 -1E-1 3E-3 507.8 89.2 11.5
851 37.0 -64.4 -13.9 1E-1 -1E-2 3E-3 536.0 90.3 13.9
400 31.1 -62.2 -18.0 -0.13 0 3E-3 569.3 89.6 18.0
760 26.0 -59.6 -20.8 -2.2 -1E-1 3E-3 606.3 84.0 20.9
819 21.8 -58.1 -21.9 1.1 -0.10 3E-3 642.6 92.9 21.9
478 18.1 -57.5 -24.1 5.2 -1E-1 3E-3 679.0 102.3 24.7
662 15.1 -55.6 -29.8 2.3 -1E-2 3E-3 722.3 94.4 29.9
291 12.5 -52.8 -34.4 -2.0 3E-2 3E-3 772.3 86.7 34.4
305 10.3 -48.8 -38.2 -5.7 1E-1 3E-3 830.6 81.4 38.6
633 8.5 -43.8 -40.2 -6.5 1E-1 3E-3 898.0 80.8 40.7
225 6.9 -39.7 -38.5 -4.3 3E-2 3E-3 968.3 83.6 38.8
51 5.6 -37.1 -35.3 -1.3 2E-2 3E-3 1038.2 87.9 35.4
81 4.6 -34.2 -32.5 2.0 4E-2 3E-3 1116.4 93.6 32.6
282 3.7 -31.7 -31.6 6.8 3E-2 3E-3 1199.8 102.2 32.3
628 2.9 -26.3 -23.8 7.9 -1E-3 4E-3 1306.9 108.3 25.1
88 2.4 -16.9 -6.6 11.0 -3E-2 4E-3 1446.6 148.9 12.8
658 1.9 -16.0 7.8 2.1 -2E-2 4E-3 1551.2 254.9 8.1
305 1.5 -7.9 11.4 2.1 1E-2 4E-3 1711.3 259.6 11.6
21 1.2 -3.1 21.8 4.6 1E-3 4E-3 1866.7 258.0 22.3
803 0.91 -5.5 26.4 3.0 -1E-2 4E-3 1984.2 263.5 26.6
623 0.71 -10.1 25.2 -2.9 -1E-2 4E-3 2095.4 276.7 25.3
481 0.55 -16.2 21.0 -4.3 -1E-2 4E-3 2202.7 281.5 21.4
369 0.42 -22.8 19.2 -3.5 -4E-3 4E-3 2313.4 280.5 19.5
281 0.32 -28.7 18.6 -1.6 -4E-3 4E-3 2438.5 275.0 18.7
213 0.24 -33.7 19.1 1.2 -3E-3 4E-3 2582.3 266.3 19.1
161 0.19 -37.5 22.9 5.7 -3E-3 4E-3 2751.9 256.1 23.6
121 0.14 -42.2 28.4 10.1 -3E-3 4E-3 2924.7 250.4 30.1
90 0.10 -48.9 33.8 11.6 -3E-3 4E-3 3085.2 251.0 35.8
67 1E-1 -56.3 36.8 12.1 -2E-3 4E-3 3248.0 251.7 38.7
48 1E-1 -63.6 36.2 13.6 -1E-3 4E-3 3432.6 249.4 38.7
33 4E-2 -70.5 31.1 16.5 1E-4 4E-3 3665.7 242.1 35.2
20 3E-2 -74.0 19.5 20.1 1E-3 3E-3 4063.2 224.1 28.0
10 1E-2 -71.2 3.2 25.4 3E-4 2E-3 4840.8 187.1 25.6
Code: Select all
Meteorological Profile: 20190923_gfs0p25
File start time : 19 9 23 0 0
File ending time: 19 9 23 21 0
___________________________________________________
Profile Time: 19 9 23 0 0
Used Nearest Grid Point (1041, 428) to Lat: 16.67, Lon: -100.00
2D Fields
PRSS MSLE UMOF VMOF TPP6 SHTF DSWF SPH2 U10M V10M T02M TCLD PBLH LHTF USTR RGHS PTRO SHGT WDIR WSPD
hPa mm W/m2 W/m2 m/s m/s oC % m W/m2 cm/s m m deg m/s
1009 1009 1010 0 0 0 7.7 632 2E-2 3.3 0.70 29.7 70.0 587 96.0 9.5 0 106 0 257.8 3.3
3D Fields
TEMP UWND VWND WWND RELH PRES TPOT WDIR WSPD
oC m/s m/s mb/h % oK deg m/s
1009 29.2 3.4 0.62 0 66.2 1008 301.8 259.7 3.5
1004 28.7 3.5 0.83 0 67.7 1002 301.7 256.7 3.6
998 28.3 3.7 0.69 -2.1 69.5 995 301.8 259.4 3.7
991 27.6 3.7 0.78 0 70.8 988 301.8 258.1 3.8
983 26.9 3.7 0.68 -2.7 73.7 978 301.9 259.7 3.8
975 26.1 3.9 0.77 0 75.9 970 301.8 258.6 3.9
964 25.2 4.1 0.68 -1.8 78.4 959 301.9 260.6 4.1
953 24.4 4.3 0.41 -1.9 78.6 948 302.1 264.5 4.3
942 23.9 4.6 0 -4.6 72.9 933 303.0 270.0 4.6
928 23.4 4.8 0 -7.1 68.0 920 303.7 270.0 4.8
912 22.2 4.7 0.38 -9.5 71.1 904 304.0 265.4 4.8
894 20.8 4.1 0.88 -12.2 75.7 885 304.4 258.0 4.2
877 19.4 3.7 1.1 -15.2 79.0 865 304.9 252.7 3.8
856 17.9 3.1 0.96 -14.5 80.0 844 305.5 252.9 3.3
833 16.8 2.7 0.37 -9.8 78.0 820 306.8 262.0 2.7
809 15.7 0.95 0.55 -5.0 81.0 796 308.4 239.8 1.1
783 14.5 -1.1 0 2.6 77.0 770 310.0 90.0 1.1
755 13.5 -3.8 -1.2 6.2 62.0 741 312.3 72.7 4.0
725 11.5 -5.5 -0.93 9.6 66.0 709 314.0 80.4 5.6
694 9.0 -5.3 -0.25 5.9 73.0 677 315.5 87.3 5.3
661 6.3 -5.3 -0.49 5.9 74.0 643 317.1 84.8 5.3
627 3.8 -6.4 -1.1 0 67.8 609 319.1 79.8 6.5
597 1.2 -6.9 -2.1 0 67.2 574 321.6 72.6 7.2
557 -1.5 -6.6 -2.4 0 61.0 538 324.4 69.6 7.0
517 -4.6 -6.0 -2.3 0 58.0 502 327.1 68.8 6.4
486 -8.0 -5.9 -2.1 0 46.0 467 329.8 69.9 6.2
446 -11.2 -8.1 -0.79 0 22.0 431 333.2 84.5 8.2
413 -15.1 -8.3 0 0 14.8 397 336.2 90.0 8.3
379 -19.6 -7.3 0.37 0 15.4 363 338.8 92.9 7.3
344 -24.6 -5.9 -0.66 0 39.3 331 341.0 83.7 6.0
316 -29.9 -2.6 -1.7 0 45.4 301 343.1 57.0 3.2
287 -35.5 0.13 -0.49 0 71.5 272 344.9 344.7 0.5
256 -41.0 2.0 0.86 0 79.7 245 347.1 246.4 2.1
233 -47.3 -0.65 -0.25 0 65.2 220 348.3 68.7 0.7
207 -53.5 -2.0 -1.2 0 74.6 197 349.8 58.7 2.3
190 -59.2 -4.2 -0.24 -6.4 85.7 175 352.0 86.7 4.2
162 -65.6 -6.0 2.5 -5.9 90.8 156 353.1 112.6 6.5
142 -70.4 -9.2 4.2 0 61.4 138 357.1 114.6 10.1
132 -75.1 -11.9 2.9 1.1 90.3 122 361.3 103.5 12.2
111 -78.1 -12.9 2.1 0 98.5 108 368.9 99.0 13.1
101 -79.3 -14.1 3.9 0.56 79.5 94.8 380.3 105.6 14.6
88 -77.2 -11.5 0.89 0 50.2 83.2 399.1 94.4 11.6
78 -73.9 -11.1 -4.0 0 13.5 72.8 421.5 70.1 11.8
68 -71.4 -12.2 0.88 -0.32 3.0 63.6 443.7 94.1 12.3
59 -69.0 -11.8 3.6 -0.19 2.2 55.4 466.9 106.7 12.3
52 -66.1 -11.7 0.87 0 2.4 48.2 492.8 94.3 11.7
45 -65.4 -13.4 -0.27 -0.20 2.8 41.8 515.2 88.8 13.5
39 -65.4 -15.8 -0.33 0.40 2.4 36.1 537.2 88.8 15.8
34 -63.3 -18.9 -2.5 0.61 1.7 31.1 566.1 82.4 19.1
29 -60.3 -24.1 -3.5 1E-1 1.3 26.7 599.8 81.7 24.4
25 -57.4 -25.9 -0.32 0.23 0.79 22.9 635.9 89.3 25.9
21 -55.1 -24.4 4.7 0.27 0.60 19.5 673.0 100.9 24.8
18 -53.6 -26.3 3.9 -0.34 0.50 16.5 710.7 98.4 26.5
15 -53.8 -30.9 2.7 -0.69 0.40 13.8 745.8 95.0 31.0
13 -53.1 -31.6 1.0 -0.31 0.30 11.6 788.1 91.9 31.6
Fernando