ARL_READ.ME 1. THE DATA ------------ TThis dataset was obtained from NOAA/ARL. It consists of 33x33 mesoscale Gulf data in eight files from July 22, 1991 to September 16, 1991. The 8 files in this dataset are: s072200 s082012 s072912 s082812 s080512 s090312 s081212 s090912 They contain data for the year 1991 and for the months of July, August and September. The files contain missing data and some duplicate data. filename missing duplicates -------- ------- ---------- s072200 9107240000 9107240606 9107280606 9107281200 9107281806 9107290000 9107290606 s072912 9108010000 9108010606 s081212 9108191200 9108191806 9108200000 9108200606 s082012 9108261200 9108261806 9108270000 9108270606 9108271200 9108271806 9108280000 9108280606 s090912 9109101200 9109101806 9109110000 9109110606 9109130000 9109130606 2. CONTENTS ------------ The sample source code is written in Fortran. arl_read.me arl_make arl_disp.F noaa_arl.F ----------------------------------------------------------------------- ----------------------------------------------------------------------- APPENDIX A received from NOAA/ARL: PERSIAN GULF DATA SET --------------------- RECORD FORMAT FB RECORD LENGTH 1139 BLOCK SIZE 9112 TIME SEQUENCE ------------- 38 RECORDS PER CYCLE 4 CYCLES PER DAY (00, 06, 12, 18Z) START 91/07/22 - 00Z END 91/09/16 - 16Z (CAUTION: DUPLICATE AND MISSING CYCLES EXIST) ......................................................... PERSIAN GULF MESOSCALE GRID (7): NORTHERN HEMISPHERE POLAR STEREOGRAPHIC 33 X 33 GRID, 91.452 KM GRID SPACING, TRUE AT 60N, ROTATED 50E, POLE AT POSITION (17,99). ......................................................... DATA ORGANIZATION ----------------- (RECORD) FIELD DESIGNATOR** UNITS LEVEL* 1 SURFACE PRESSURE PRES mb 1 2 ACC. TOTAL PRECIP PREC m 1 3 U WIND COMPONENT UWND m/s 2 4 V WIND COMPONENT VWND m/s 2 5 TEMPERATURE TEMP deg K 2 6 SPECIFIC HUMIDITY SPHU kg/kg 2 7 U WIND COMPONENT UWND m/s 3 . . . . . . . . . 38 SPECIFIC HUMIDITY SPHU kg/kg 10 DATA FORMAT ----------- YEAR MONTH DAY MODEL FORECAST LEVEL GRID FIELD HOUR HOUR NUMBER NUMBER DESIGNATOR (0 OR 6) (*) 7 (**) I2 I2 I2 I2 I2 I2 I2 A4 SCALING UNPACKED DATA FIRST UNPACKED PACKED EXPONENT PRECISION DATA VALUE DATA VALUE (at grid point 1,1) (33X33 one byte values) I4 E14.7 E14.7 BINARY *LEVEL ------- 1 SURFACE SIGMA LEVELS ------------ 2 1 .995 3 2 .981 4 3 .960 5 4 .920 6 5 .856 7 6 .777 8 7 .688 9 8 .594 10 9 .497 ----------------------------------------------------------------------- ----------------------------------------------------------------------- ----------------------------------------------------------------------- APPENDIX B received from NOAA/ARL: M = MISSING D = DUPLICATE JULY 1991 AUGUST 1991 SEPTEMBER 1991 00 06 12 18 00 06 12 18 00 06 12 18 -- -- -- -- -- -- -- -- -- -- -- -- 01 M M 02 03 / 04 05 / 06 07 08 09 / 10 M M 11 M M 12 / 13 M M 14 15 16 |----- 17 -----| 18 END 19 M M 20 M M / START 21 ----------- 22 23 24 D D 25 26 M M 27 M M M M 28 M M M M M / 29 M M / 30 31