ST MEETING 5 July, Forecast for 6 July - DOY 187




ST meeting 0705 Saturday
Dear Trish

The ST (basically Jost) would like to repeat the clear LAGRANGIAN. We
contacted Sagres and they confirmed readiness. Today, apart from the
meteo, also the ARAT had problems with their LIDAR which are now solved.
The ship should be at 36N30' 10W00' by 0900Z tomorrow Sunday. Balloon
will be released at 0700Z if the sounding of 0630Z shows no low BL. 
The ship should stay around the  position till 1200Z after which it
should sail 38N00' 12W00' which we expect will be in the northerly
airmass. We would like to have data from the ship, on Monday morning,
about aerosol and pollution levels in the Gibraltar airmass and the
Northerly airmass. This would be helpful in planning where to perform
the polluted CLOUDYCOLM on Monday and Tuesday. Watch out for special
features (nucleation?) when going from one airmass into the other.
By the way. Is Tim still alive? Give him my regards.
Frank



ST meeting 0705 Saturday

Meteo outlook

DAY N+1, N+2: Both days: Upper levels: small relative low over Canaries,
with variable winds. Low levels: 1032 high to the north Iberian
peninsula, advecting dry-air over the ACE2 area. N and NE winds, around
16 kt on average. The MBL-top will decrease. Clear skies over eastern
ACE2 area, and scattered cloudiness over the rest, increasing the cloud
deck southwestward. 
DAY N+3, N+4 : Upper levels: Trough line to the west Iberian peninsula,
moving eastward. W winds over the whole ACE2 area. Low levels: two 1024
highs, one over UK and the other over Azores, moving eastward. Dry-air
continues advecting over the area, and MBL-top will decrease. N
component winds around 8 kt. Clear skies eastward ACE2 area and
scattered cloudiness on the rest. N+4: Upper levels: The trough line is
over the Iberian peninsula and a relative high is over Canaries. W winds
over the whole area. Low levels: 1028 high over Azores, extending
towards Iberian peninsula, and starting to advect clean maritime air. N
component winds, around 15 kt on average. Scattered to broken
cloudiness, increasing southwards

Operations

Today
1. 3rd LAGRANGIAN flight interrupted because of failing motor on C130.
Pelican finished clean full LAG. with 4th flight.  
2. Clear LAGRANGIAN between Sagres and ship with ARAT was called off
because of inappropriate meteo and problems with ARAT LIDAR. 

Sunday
3. Clear LAGRANGIAN between Sagres and ship. Balloon release at 0700Z.
Ship in airmass coming from Gibraltar. ARAT morning flight to support
experiment.
4. CLEARCOLUMN over Sagres during ARAT evening flight.

Monday
5.  Ship to move in and characterize airmass coming along coast of
Portugal.
6. Possible CLOUDYCOLUMN near Madeira with Merlin/Dornier/Pelican/ARAT

General
- size distributions from C130, Pelican and PDH during Clean LAGARNGIAN
will be presented soon.