ST meeting 0703 Thursday Meteo outlook DAY N+1: Upper levels: Cold low over UK with trough line along Iberian peninsula. Ridge over northern Atlantic. Upward air movement over eastern Iberian peninsula, and subsidence over the whole ACE2 area. N and NW winds. Low levels: relative low northern Africa, and high of 1032 eastward Azores. Winds: NE, around 17 kt on average. Still clean air except over Sagres in the MBL. Scattered to broken cloudiness, mainly of stratocumulus, with amount increasing from Sagres toward Canaries and Madeira. DAY N+2: upper levels: the low is moving eastward, and the trough line is over France. Ridge over northern Atlantic, giving subsidence. low levels: the high is moving eastward, favouring european polluted-air outbreak. Winds: NE , around 16 kt on average. Scattered to broken claudiness, increasing toward Canaries and Madeira. DAY N+3, N+4 Both days: stationary high, centered northwestward Iberian peninsula, favouring antropogenic polluted-air over the ACE2 area. MBL-top will decrease due to subsidence and warm advection. Winds: NE, around 14 kt on average. Clear skies over northward ACE2 area, and stratocumulus cloud deck increasing toward Canaries and Madeira. Operations Today 1. Clean full LAG to start at 2100Z, with ship at 40N 11W. Airmass expeceted in Tenerife around Sat 0900Z. Sagres should also sample as much as possible during this LAG. 2. Citation flight. 3. Cloudy COLUMN canceled: dissipating cloud 4. Observations of Montserrat volcan by IZO/TNS were false. Instead it is observed in Miami! 5. No information about behavior Mexican volcano plume. Friday 6. Continuation full LAG 7. CloudyCOLUMN to be decided at morning meeting Saturday/Sunday 8. Expected to be transition days between clean and polluted air masses over ACE-2 area. 9. ARAT stands by from Sun 1200Z till Mon 1200Z 10. Earliest start of 'dirty work' at 2100Z From - Thu Jul 03 21:31:45 1997 X-POP3-Rcpt: dm@opcen2 Return-Path: Received: from opcen7.ace2.iac.es (opcen7.ace2.iac.es [161.72.47.7]) by ace2.iac.es (8.8.4/8.8.4) with SMTP id TAA01651; Thu, 3 Jul 1997 19:25:31 GMT Message-ID: <33BC1964.2CD6@ace2.iac.es> Date: Thu, 03 Jul 1997 21:28:05 +0000 From: Frank Raes Reply-To: frank.raes@opcen2.ace2.iac.es Organization: ACE2 X-Mailer: Mozilla 3.01 (Win95; I) MIME-Version: 1.0 To: all@ace2.iac.es, users , dm@ace2.iac.es CC: bruno , jm , Claus , Gianni Subject: ST meeting 0703 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mozilla-Status: 0001 Content-Length: 1950 ST meeting 0703 Thursday Meteo outlook DAY N+1: Upper levels: Cold low over UK with trough line along Iberian peninsula. Ridge over northern Atlantic. Upward air movement over eastern Iberian peninsula, and subsidence over the whole ACE2 area. N and NW winds. Low levels: relative low northern Africa, and high of 1032 eastward Azores. Winds: NE, around 17 kt on average. Still clean air except over Sagres in the MBL. Scattered to broken cloudiness, mainly of stratocumulus, with amount increasing from Sagres toward Canaries and Madeira. DAY N+2: upper levels: the low is moving eastward, and the trough line is over France. Ridge over northern Atlantic, giving subsidence. low levels: the high is moving eastward, favouring european polluted-air outbreak. Winds: NE , around 16 kt on average. Scattered to broken claudiness, increasing toward Canaries and Madeira. DAY N+3, N+4 Both days: stationary high, centered northwestward Iberian peninsula, favouring antropogenic polluted-air over the ACE2 area. MBL-top will decrease due to subsidence and warm advection. Winds: NE, around 14 kt on average. Clear skies over northward ACE2 area, and stratocumulus cloud deck increasing toward Canaries and Madeira. Operations Today 1. Clean full LAG to start at 2100Z, with ship at 40N 11W. Airmass expeceted in Tenerife around Sat 0900Z. Sagres should also sample as much as possible during this LAG. 2. Citation flight. 3. Cloudy COLUMN canceled: dissipating cloud 4. Observations of Montserrat volcan by IZO/TNS were false. Instead it is observed in Miami! 5. No information about behavior Mexican volcano plume. Friday 6. Continuation full LAG 7. CloudyCOLUMN to be decided at morning meeting Saturday/Sunday 8. Expected to be transition days between clean and polluted air masses over ACE-2 area. 9. ARAT stands by from Sun 1200Z till Mon 1200Z 10. Earliest start of 'dirty work' at 2100Z