dset /data/raid1/Tang-output/helens-60km/TAERO.10-27.m97x62.nc title St. Helens Tracer undef -99999.0 xdef COL 97 linear 1. 1. ydef ROW 62 linear 1. 1. zdef LAY 20 levels 18.13 54.51 109.33 219.88 406.97 675.05 990.77 1358.73 1828.49 2368.88 2942.16 3553.03 4207.36 4912.52 5678.06 6516.63 7527.74 8868.97 10717.2 13153.4 * in GMT tdef TSTEP 2721 linear 00Z27OCT2004 3hr vars 7 DUST1=>dust1 20 99 Volcanic Tracer below 500m DUST2=>dust2 20 99 Volcanic Tracer 500m-1km DUST3=>dust3 20 99 Volcanic Tracer 1-2km DUST4=>dust4 20 99 Volcanic Tracer 2-3km DUST5=>dust5 20 99 Volcanic Tracer 3-5km DUST6=>dust6 20 99 Volcanic Tracer 5-8km DUST7=>dust7 20 99 Volcanic Tracer above 8km endvars