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Key-Events Specific Details:
3/25/97 KEY-events: ----------- KEY-EVENT DATE CLOUD-EVENT RELATED AEROSOL 1. cirrus profiling 4/20 18:49.2 - 18:52.6 18:55.5 - 19:03.0 2. wave-cloud 5/02 20:26.0 - 20:29.6 20:29.7 - 20:33.0 3. low sulfur 5/04 18:12.0 - 18:14.7 18:14.8 - 18:19.0 4. high sulfur 5/04 18:48.9 - 18:51.2 18:40.9 - 18:48.8 5. pers. contrail 5/12 23:16.5 - 23:18.0 23:00.0 - 23:01.5 there are 2 attachments: 1. DETAILS .... and other promising cases to study 2. MORE specific DETAILS on KEY-EVENTS ------------------------------------------------------------------------------ DETAILS .... and other promising cases to study SELECTED KEY-EVENTS date time case/why (clear/Ci-unc) person ----------------------------------------------------------------- 4/18 18:33 -18:36 aerosol/impactor analyzed R.Puesch 4/18 18:45 -18:48 aerosol/impactor analyzed R.Puesch 4/18 19:01:40-19:16 cirrus cloud tops A.Heymsf ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 4/18 - Wl - - Wr Wr,2 - Wl,1 W W 8 W w W 1 date time case/why (patchy cirrus) person ----------------------------------------------------------------- 4/20 18:34 -18:41 loops at 9.7km P.Lawson 4/20 18:43 -18:47 loops at 9.7km P.Lawson 4/20 18:48 -18:59 downward (9.7-6.8km) P.Lawson CASE 1 4/20 19:37 -19:42 long leg near CART at 8.2km 4/20 19:44 -19:50 long leg near CART at 10.1km 4/20 20:22 -20:41 loop + dn spiral (10-6.7km) ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 4/20 - Wl - W Wr Wr,3 - Wl,1 W W 7 W w W 4 date time case/why (cell.cirrus) person ----------------------------------------------------------------- 4/24 22:00 -22:42 cirrus C.Twoohy 4/24 22:28 -22:33 cirrus/impactor analyzed R.Puesch ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 4/24 - Wl - W Wr Wr,4 - Wl,1 W W 10 W W W 4 date time case/why (thick cirrus) person ----------------------------------------------------------------- 4/27 18:02 -18:27 ER2-comparison (DC-8: 6.1km) J.Spinhi 18:00-18:19 cloudy, rest clear ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 4/27 - Wl - - Wr Wr,3 fl - W W 10 W W W 3 date time case/why (wave-cloud) person ----------------------------------------------------------------- 4/30 20:36:40-20:37:10 wave-cloud Heym/Law 4/30 21:10:10-21:11 wave-cloud (not 21:12-21:15?) A.Heymfs ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 4/30 - - - W Wr Wr,2 Wl Wl,1 f W 10 W W w 6 date time case/why (wave-cloud) person ----------------------------------------------------------------- 5/02 21:19 -21:20:40 wave-cloud A.Heymsf 5/02 20:23:55-20:30 wave-cloud A.Heymsf CASE 2 5/02 20:51 -20:53 wave-cloud ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/02 - - - W Wr Wr,3 Wl Wl,3 W W 10 W W W 7 date time case/why (exhaust of 757) person ----------------------------------------------------------------- 5/03 21:51 -21:56 aerosol/impactor anal(12.5km) R.Puesch ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/03 - - - W Wr Wr,2 fl Wl,2 W W 6 W w W 6 date time case/why (757: mic+rad) person -------------------------------------------------------------------------- 5/04 17:52 -17:55 cirrus(?)/impactor analyzed R.Puesch 5/04 18:12 -18:14 cirrus/impactor analyzed R.Puesch CASE 3 5/04 18:14 -18:19 aerosol/impactor anal (low) R.Puesch CASE 3 5/04 18:38 -18:42 high sulfur CASE 4 5/04 18:41 -18:46 aerosol/impactor anal (high) R.Puesch CASE 4 5/04 18:54 -19:10 low sulfur 5/04 19:29 -19:34 aerosol/impactor anal (high) R.Puesch 5/04 19:35 -19:43 high sulfur 5/04 19:53 -20:06 low sulfur ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/04 Wl - - W Wr Wr,2 - Wl,2 W W 9 - W W 6 date time case/why (757: mic+rad) person ----------------------------------------------------------------- 5/07 20:34 -20:45 757contrail/elec.microscope C.Twoohy (1.event: 20:34.5 - 20:35.2) (2.event: 20:36 - 20:37 ) ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/07 - Wl - W Wr Wr,2 Wl - W W 5 - w w 4 date time case/why (thin cirrus) person ----------------------------------------------------------------- 5/08 17:28 -17:32 Lawson 5/08 17:34 -17:35 Lawson 5/08 18:26 -18:59 cs with gaps of clear air /11.3km Lawson (29.0-42.6, 44.3-48.8, 49.8-50.8) 5/08 20:08 -20:12 Lawson ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/08 - Wl - W Wr Wr,2 Wl - W W 3 W W W 8 date time case/why (persis.contrail) person ------------------------------------------------------------------ 5/12 22:53 -23:12 persist.contrail A.Heymsf CASE 5 5/12 22:52 -23:30 contains gaps with clear air P.Lawson 5/12 22:59 -23:01 pre-condition for contrail 5/12 23:16 -23:18 15 min old contrail 5/12 23:32 -23:38 under, in and above aged con ----------------------------------------------------------------- date fssp 2dc 1dc la mas scope vips repl ge cvi im cc in cn is ----------------------------------------------------------------- 5/12 - Wl - W Wr Wr,3 Wl - W W - W W W 3 _________________________________________________________________ W : working la - lawson (detailed status-report below) w ; worked partly im - impactor (# of samples, times below) - : not available ge - gerber probe f : failed cvi - counterflow virtual impactor repl - replicator (# of 2-hour tapes) r : on right wing scope - cloudscope (# of 2-hour tapes) l : on left wing vips - particles sampler (times below) masp - multiangle spectrometer probe fssp - forward scattering probe 1-DC - diode probe ----------- 2-DC - diode array probe EXPLANTION cc - cloud condensation nuclei (DRI) to the (supersat: .02-1%, 35 channels) INSTRUMENTS in - ice nuclei (CSU) ----------- cn - condensation nuclei (CSU) is - aerosol impaction (# of) samples (CSU) _________________________________________________________________ ------------------------------------------------------------------------------ MORE DETAILS ON THE KEY-EVENTS I looked at the most interesting cases in more detail and separated particle/water-rich events (cloudy) from particle-poor events (clear). (this way both cloud and background can be compared). (times are given in hour:minute.fraction-of-minute) * marked selected cases ** marked suggestions if limited to only a few comparisons. CIRRUS PROFILING 4/20 with good lawson data is preferred over 4/24 ---------------- Among the many possible cases I picked a descent event near the CART site, which is early enough as not to rule out replicator data (->19.00) 4/20 (broken) cirrus near CART altitude 16:57.5 - 17:05.5 mixed 7.3-8.0 45sec ave 17:36.0 - 17:52.0 cloud 8.8-9.5 overlap ** 18:28.0 - 18:52.0 cloud 9.7km loops/descent 19:37.0 - 20:05.5 mixed 8.2-10. overlap 20:15.0 - 20:23.0 homog 10km CART WAVE CLOUD CASE 5/2 seems to be the primary wave-cloud case (as to 4/30) --------------- 20:25-20:30 wave-cloud case is already a 'classic' 3. wave-cloud near Boulder at 11.9km 20:23.8 - 20:24.2 cloud 20:24.3 - 20:24.9 clear 20:25.0 - 20:25.6 cloud 20:25.7 - 20:25.9 clear ** wc 20:26.0 - 20:29.6 cloud ** ae 20:29.7 - 20:33.0 clear HIGH/LOW SULFUR 5/4 is probably the best day (+other plane +near CART) --------------- 3. low sulfur case at 11.7km 18:10.0 - 18:11.1 clear 18:11.2 - 18:11.5 cloud (contrail) 18:11.6 - 18:11.9 clear ** ex 18:12.0 - 18:14.7 cloud (contrail) ** ae 18:14.8 - 18:19.0 clear 18:19.1 - 18:20.0 cloud (contrail) 4. high sulfur case at 11.7km 18:34.0 - 18:38.3 clear 18:38.4 - 18:39.3 cloud (contrail) 18:39.4 - 18:39.7 clear 18:39.8 - 18:39.9 cloud (contrail) 18:40.0 - 18:40.4 clear 18:40.5 - 18:40.8 cloud (contrail) ** ex 18:40.9 - 18:48.8 clear ** ae 18:48.9 - 18:51.2 cloud PERSIST. CONTRAIL 5/12 seems to be day of choice ------------------ 5. over N.California ** ae 23:00.0 - 23:01.5 10.66km pre-condition (aerosol) ** co 23:16.5 - 23:18.0 10.72km 15min old contrail 23:32.0 - 23:33.5 10.10km below aged contrail 23:34.5 - 23:36.0 - up - in aged contrail 23:36.5 - 23:38.0 11.20km above aged contrail
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