ST MEETING 30 June, Forecast for 01 July - DOY 182

ST meeting 0630 Monday

Meteo outlook

DAY N+1. Upper levels: Cold low over the British Islands with a
trough-line to Azores and a secondary low between Azores and Sagres
moving east and weakening. Rising air all over the area, except for the
south end. Clean air is advected everywhere over the area. Low levels:
The low coming from Azores into the ACE-2 area will weakening while its
frontal system will move through the area increasing cloudiness in the
west during the morning and spreading to the east during the afternoon.
An anticyclone will start
moving east from New Azores. Clean and sligly subsident air will be
advected all over the area. Mostly cloudy in the west of the area with
stratocumulus and scattered to the east with cumulus clouds increasing
to mostly cloudy during the afternoon with cumulus and stratocumulus.
Some rain is expected mainly in the NW of the area and later on in the
north of the islands. MBL will tend to deep 
DAY N+2. Low levels: The anticyclone will move over the Azores during
the day with its edge reaching the ACE-2 area. The low over the British
Islands will move slightly to the NE. Mostly cloudy all over the area
with stratocumulus clouds. Some rain most likely in the north of ACE-2
area and just north of Tenerife. The MBL will remain quite deep with
cloud bases occassionally around 400 meters just north of Tenerife. Wind
from the N at 10-12kt to the west and NW at 8-10 to the east. Clean air
will be advected over the whole area. 
DAY N+3. Upper levels: cold low over the British Islands with a trough
line through the Iberian Peninsula down to the Canary Islands. Clean and
slighty sinking air all over the area. Low levels: The 1028hpa
anticyclone over Azores almost stationary giving Ne winds at about 15kt
all over the area. Mostly cloudy with stratocumulus clouds and
possibility of some rain just north of Tenerife. MBL will tend to
decrease, with occasionaly cloud bases around 400m north of Tenerife. 
DAY N+4. Upper levels: same situation as in N+3. Low levels: The most
important is that the anticyclone will tend to move to the NE giving
over the ACE-2 area winds from the NE at about 20-25kt. Cloudiness will
range from almost clear over Sagres increasing soutwards to scattered
cumulus clouds and broken stratocumulus clouds north of Tenerife. MBL
will tend to decrease with clouds bases north of Tenerife around 700
meters and occassionaly 400 meters.

Operations

Today
2. No trace of the  Montserrat volcano plume in any of the remotely
sensed data (satellite, LIDAR, sun-photometer) 
3. Ship arrived near Sagres at 1200. Will leave for a position up-wind
of Sagres
for coordinated measurements. (LIDARs, nucleation studies)
4. no HILLCLOUD tonight
5. ADEOS knocked out of operation by space debris.

Tuesday 
6. Citation makes morning flight to hunt Montserrat volcano plume. If
found second flight
in the afternoon. Coordination with IZO/TNS LIDARs
7. Clear COLUMN flight by Pelican
8. Coordinated Merlin/Pelican legs for PCASP/CPC intercomparisons
    MRF PCASP on Merlin.
9. Ship to do coordinated measurements with Sagres till the evening, and
wait for
notice from ST meeting.

Wednesday/Thursday
10. Re-establishment of  High over the  Azores. Conditions expected to
be  OK for full LAGRANGIAN 
on Thursday, unknown  whether it'll be clean or polluted.

General:
- IZO, PDH and Ciatation will analyze their  SO2 (and DMS?) data so far,
to check the feasibility
of an A/C SO2 intercomparison.
- C130 and Pelican radiometer data will be analyzed before a possible 2
A/C radiation study
over the ship
- Lynn Russell is preparing, for one of the next meetings, a short
presentation on entrainment and
aerosol dynamics.