75 1001 Gary, Bruce L. (JPL) & Roland Chan (ARC) and Paul Bui (ARC) M/S 246-101; JPL; Pasadena, CA 91109; bgary@jpl.nasa.gov ER-2 Microwave Temperature Profiler (JPL) & Meteorology Measurement System (ARC) STRAT 1 1 1996 02 05 1997 10 28 {FLT DATE & REDUCTION DATE} 0.0 Sequence number 8 {NV = number of primary variables} 1 1 1 1 1 1 1 1 {scale factors for primary variables} 999999 9 99.9 99.9 99.9 999 9 999999 {missing values for primary variables} Date [YYMMDD] Event code: 1=ascent, 2=dip1, 3=dip2, 4=descent Tropopause pressure altitude [km] Positive uncertainty [km] Negative uncertainty [km] Theta of tropopause [K] Source: 0=MMSonly, 1=MMSmostly, 2=MTP&MMS, 3=MTPmostly, 4=MTPonly Date of last revision, in YYMMDD format 35 {number of special comment lines following this line; Nhdr=40+Nscl} Following notes refer to trop event "sequence number" in body of this file. 1 No ambiguities; MTP & MMS agree well 5 Possible 2nd trop at 13.4 km (MTP & MMS show same) 6 Possible trop at 12.1 km 7 Possible trop at 16.2 km (MMS is compatible with this) 11,12 A really complicated day! Big changes with time, & latitude, esp. for Legs 1 & 2. 11,12 MTP shows double trop for LAT < 38.8, being 9.2 & 12.2 km; single trop for LAT > 38.8, being 12.1 km. 11,12 Oakland RAOB shows trop rising from 7.9 to 11.9 km during 12 hrs surrounding flt times. Meford, OR shows 11,12 trop at 12.2 to 12.3 km is stable in time. Remnant of tropical trop exists at 16 km. 15 Region between 11.9 & 12.6 could contain trop. 16 Region 11.0 to 11.6 km could contain trop. 18 Last leg, at 12.4 km: trop varies between 11.9 & 12.3 km (refer to MP-file; average abt 4 cy to reduce stochastic noise). 19 Ascent shows possible 2nd trop at 15.0 km. Deep trop-critical lapse rate extends from 12.4 to 15.0 km. 20 Descent shows deep region with trop-critical lapse rate, from 12.1 to 14.9 km! 21 Small chance that trop is at 13.6 km (MMS), but MTP argues for 12.3 km (also consistent with MMS). 22 MMS has 3 candidate trops, 11.9, 12.7 & 15.2 km. MTP argues for 12.3 +/- 0.5 km, favoring the lower two candidates. 21,22 Oakland RAOB says trop went from 12.4 to 11.9 km from before to after flight. 21,22 Considering all 3 methods, trop probably = 12.0 km. 23 South end has 2 trop candidates, 15.8 & 17.2 km, with 15.8 km favored; north end has one trop candidate, 15.9 km. 25-29 Stack flt within transition fr sub-tropical to mid-latitude; latitude gradients; double trop at S end, single at N 25 Leg 1, S end; double trop (10.9 km, 219.5 K & abt 14.2 km) 26 Leg 1, mid (39.0 deg lat); double trop (11.0 km, 217.6 K & abt 14.2 km) 27 Leg 1, N end; single trop (11.2 km, 214.4 K) 28,29 Descent, S end; double trop; 10.8 km, 216.5 K & 14.2 km, 211.2 K 31 MTP trops tend to be high in this situation, so allow for 14.0 to 14.1 km. 34 Additional MTP analysis shows that the 16.1 km trop candidate is untenable; trop's at 17.4 km! 34 70% that dip trop is 17.4 km, 30% that it's 16.1 km. 36 No MTP data after leg 6. 39,40 Double trop during descent. 41,42 & 43,44: Double trop during ascent & descent. No MMS data, so theta's are uncertain. 45,46: Trop just under leg 3, perhaps 100 meters. 50-53: Double trop. Lower trop is 100 meters below Leg 3. Upper trop is 300 meters above Leg 6. 54,55: Double trop, barely. 56: Dip appears to have not gone far enough for MMS data to establish trop alt (no MTP data this flight). 18 {number of normal comment lines after this one} Here's a brief tutorial on what follows: 1st column is a monotonic sequence # (also used to reference special comments) 2nd column is date of flight, YYMMDD format 3rd column is code for ascent (1), 1st dip (2), 2nd dip (3) & descent (4) 4th column is tropopause pressure altitude [km] 5th column is +SE of tropopause altitude [km] 6th column is -SE of tropopause altitude [km] 7th column is potential temperature at the tropopause [K] 8th column shows relative reliance on MTP & MMS: where 0=MMS only, 1=MMS mostly, 2=MTP & MMS, 3=MTP mostly, 4=MTP only 9th column is revision date for this line of data 4=MTPonly 1=ASC 3=MTPmstly FLT 2=DIP 2=MTP&MMS DATE 3=DIP TROP 1=MMSmstly Revision Seq# YYMMDD 4=DSC PALT SE+ SE- THETA 0=MMSonly Date 1 950503 1 11.9 0.3 0.2 335 2 970611 2 950503 4 11.8 0.2 0.2 336 3 970611 3 950508 1 12.4 0.2 0.2 344 3 960426 4 950508 2 12.0 0.7 1.5 337 4 960426 5 950508 4 12.2 0.2 0.2 337 1 970611 6 950511 1 13.0 0.1 0.3 352 2 970611 7 950511 2 14.8 0.2 0.4 357 4 970611 8 950511 4 13.0 0.1 0.1 344 2 970611 9 950512 1 12.7 0.3 0.3 349 1 970411 10 950512 4 13.0 0.1 0.1 350 1 970611 11 950515 1 8.3 0.3 0.2 314 1 970612 12 950515 4 11.9 0.3 1.0 352 0 970612 13 950516 1 12.5 0.1 0.1 351 2 960426 14 950516 4 12.0 0.2 0.3 347 1 970611 15 950517 1 11.3 0.3 0.3 340 0 970611 16 950517 4 10.9 0.1 0.1 332 1 970611 17 950518 1 12.4 0.1 0.1 349 2 970611 18 950518 4 12.1 0.1 0.1 342 3 970611 19 951020 1 12.5 0.2 0.2 343 2 960426 20 951020 4 12.2 0.2 0.2 340 1 960426 21 951024 1 12.3 0.2 0.3 345 3 970611 22 951024 4 12.0 0.2 0.3 346 2 970611 23 951026 1 15.9 0.3 0.3 383 4 970611 24 951026 4 15.9 0.2 0.5 383 1 970611 25 951031 1 10.9 0.1 0.2 334 4 970613 26 951031 1 11.0 0.2 0.2 333 4 970613 27 951031 1 11.2 0.2 0.2 331 4 970613 28 951031 4 14.2 0.1 0.3 373 1 970613 29 951031 4 10.8 0.1 0.1 328 1 970613 30 951102 1 11.8 0.1 0.1 336 1 960426 31 951102 2 14.2 0.2 0.3 360 4 960426 32 951102 4 14.1 0.3 0.1 357 2 960426 33 951105 1 15.0 0.1 0.1 363 2 960426 34 951105 2 17.4 0.2 0.2 388 3 970611 35 951105 4 16.6 0.2 0.4 386 2 960426 36 951107 1 15.7 0.3 0.3 376 4 960426 37 951109 1 14.9 0.2 0.1 369 2 960426 38 951109 2 16.1 0.1 0.2 383 4 960426 39 951109 4 16.7 0.2 0.1 400 2 960426 40 951109 4 12.0 0.1 0.1 334 1 960426 41 960126 1 11.9 0.1 0.1 325 4 971027 42 960126 1 15.8 0.4 0.4 393 4 971027 43 960126 4 12.2 0.1 0.1 331 4 971027 44 960126 4 15.9 0.1 0.1 397 4 971027 45 960129 1 12.2 0.1 0.1 333 3 971027 46 960129 4 12.2 0.1 0.2 337 3 971027 47 960201 1 12.1 0.1 0.1 342 2 971027 49 960201 4 12.1 0.1 0.1 341 2 971027 50 960202 1 11.7 0.1 0.1 333 3 971028 51 960202 1 16.4 0.1 0.1 404 1 971028 52 960202 4 16.3 0.1 0.1 405 1 971028 53 960202 4 11.7 0.1 0.1 335 3 971028 54 960205 1 11.2 0.2 0.2 331 0 971028 55 960205 1 15.2 0.2 0.2 387 0 971028 56 960205 2 15.7 0.0 5.0 375 0 971028 57 960205 4 16.7 0.1 0.2 374 0 971028