ST MEETING 10 July, Forecast for 11 July - DOY 192

Dear Trisch. Maybe you are not going to like this, but ST agreed
(unanimously) that the best thing for the ship to do is to go … North.
The dust is now way south (<22 N). We would like you to be at 33N 10W by
Tomorrow FRI 1400Z for a CLEARCOLUMN with the C130, if the latter
doesn't operate near Sagres. There was a lot of pollution today at
Sagres, which might be over you tomorrow. Comments welcome. No news
about Seawiffs. We are not able to fine the ships soundings on GTS. They
don't seem to be there. Frank.


ST meeting 0710 Thursday

Meteo outlook

DAY N+1, N+2 : 
Both days: Upper levels: low NW of British Isles; trough W of Iberian
peninsula moving E. NW and W winds over the whole area. Low levels: High
of 1028 mb over Azores, stationary; low NW British Isles, with
associated cold front moving SE; Thermal low over Sahara. NW winds
northern part ACE2 area and NE southern, around 16 kts on average. Clean
maritime air is advected over the whole area. The MBL-top and the cloud
thickness will increase.
DAY N+3, N+4 : 
Both days: Upper levels: Trough line crossing northern part ACE2 area
and Iberian peninsula, moving E; Ridge line N Atlantic. NW and W winds.
Low levels: High over Azores immobile and reinforcing, low N of Iberian
peninsula moving NE, with associated cold front crossing northern ACE2
area; Thermal low over Sahara. NW winds northern ACE2 area and NE
southward, 12 kts on average the N+3 day and increasing to 17 kts N+4.
The MBL-top and the cloud-thickness will continue to increase. Clean air
is advected everywhere. Some rain is expected when the front is crossing
the area. Some rain also N Canaries.

Operations

Today Thursday
1. Successful  (unless proven otherwise) CLEARCOLUMN with Pelican over
ship at 29N30 13W00' with MBL pollution only
2. Successful Citation stack flight in dust layer near Tenerife.

Friday
3. First priority is CLEARCOLUMN over  Sagres with C130, in European
pollution. GONOGO at 0800Z ST meeting. Back-up missions for C130:
CLEARCOLUMN over ship near 33N00' 10W00' or CLOUDYCOLUMN near Porto
Santo. Both Sagres and ship to send AOD and aerosol levels by 0730Z.
4. CLOUDYCOLUMN near Porto Santo with Merlin Dornier ARAT (+ possibly
C130)
5. Pelican on the ground. 

Saturday
6. Possibility for (Clear) LAGRANGIAN with C130, ARAT and balloon
release from Sagres without the ship has been discussed. Last day of
ARAT availability.

Next Thursday: next pollution outbreak expected ( based on 8 days
forecast!)

General
- Lynn, Rita and Colin will present size distribution data from the
clean full LAGRANGIAN.