WINTERTIME TETHERED BALLOON MEASUREMENTS OF METEOROLOGICAL VARAIBLES AND AEROSOLS IN SUPPORT OF MANE-VU 2004

Transcription

1 WINTERTIME TETHERED BALLOON MEASUREMENTS OF METEOROLOGICAL VARAIBLES AND AEROSOLS IN SUPPORT OF MANE-VU 2004 Richard D. Clark *, Dennis M. O Donnell, Kevin N. Berberich, Chris J. Homan, Daniel T. Brewer, Evan M. Lowery, Jennifer E. Bunting, Courtney L. Hanna, Maureen T. Maiuri, John E. Yorks A total of 18 students while classes were in session Funded by the Northeast States for a Coordinated Air Use Management (NESCAUM)

2 Introduction Data Collection Overview of Winter 2004 Case Studies Key Elements Conclusions Future Work

3 Introduction: Why study the wintertime boundary layer? Studies of the WBL and its chemistry are rare; longduration aloft measurements are virtually non-existent Dynamics and thermodynamics are very different than summertime Synoptic gradients can easily overwhelm local and regional effects, but Strong static stability can lead to stratification and a rapid enhancement of local and regional effects There is a need for high resolution wintertime profiles for modeling comparison and validation

4 Data Collection 6 Weeks from 3 January 14 February 2004 Lat N; Lon W; Elev. 100 m MSL Class I visibility area in the MANE-VU domain located 16.2 km SW of the Lancaster, PA airport Semi-rural, agricultural setting typical of the region Pittsburgh 300 km to the west, New York City 150 km to the northeast, and Baltimore and Philadelphia with a 100 km radius to the south and east respectively. Lancaster, PA (pop. 50,000) 9 km east of the site Representative of the mid-atlantic piedmont area about halfway distant between the Atlantic coastal plain and the Appalachian Mountains

5 Data Collection: Platforms Two 12 m 3 balloons each with 7.5 kg payload capacity Blimp (top) used for vertical profiling to 750 m AGL Balloon (bottom) used for constant altitude time series at designated altitudes of interest. Daily Number of Vertical Profiles During MANE-VU /13 2/12 2/11 2/10 2/9 2/8 2/7 2/6 2/5 2/4 2/3 2/2 2/1 1/31 1/30 1/29 1/28 1/27 1/26 1/25 1/24 1/23 1/22 1/21 1/20 1/19 1/18 1/17 1/16 1/15 1/14 1/13 1/12 1/11 1/10 1/9 1/ profiles Date Constant Altitude Time Aloft During MANE_VU Minutes /13 2/12 2/11 2/10 2/9 2/8 2/7 2/6 2/5 2/4 2/3 2/2 2/1 Date 1/31 1/30 1/29 1/28 1/27 1/26 1/25 1/24 1/23 1/22 1/21 Numbner of Soundings 87 hours

6 Data Collection: Instruments

7 UMD-MU COMPARISON RETURN TO UMD PROFILE TO 9,500 FEET FERRY FROM UMD TO MU RETURN TO MU SITE; START PROFILE 2-3 FLY-BYS DESCENT TO START PROFILE PROFILING BALLOON DESCENDS SIMULTANEOUS WITH AIRCRAFT ASCENT LOW PASS AT MANOR KNOLL LANDING STRIP

8 Overview of Winter 2004: Climatology January First From half 3 was January In of The the February month 10 The - 14 coldest January February both temperature was also on thaw 2004, record drier was than the in still and absent the site normal -2 precipitation mid-atlantic experienced F in below with 2004 only normal in returned region the temperature 30% mid-atlantic and with of to precipitation normal near a -6 departures F normal precipitation region departure was values of twice -6.6 from F normal. from normal and 9.6 mm above normal precipitation JANUARY FEBRUARY

9 Difference in synoptic pattern between early and late periods Early January characterized by progressive wave short pattern Rapid exchange of air masses Influx of air from the Canadian Provinces Coupling of the subtropical and polar jets Strong baroclinicity Late Significant pattern change in late January (~ 27 th ) Mean trough established in Midwest Influx of air from southcentral US and Gulf of Mexico Temperature and moisture more seasonal Strong baroclinicity continues

10 Case Studies: 2 FEB 2004 (daytime progressive anticyclone) 00Z 3 FEB 04 12Z 2 FEB 04

11 Case Study: 2 FEB Temperature Descent 2 February 2004, EST Temperature Ascent 2 February 2004, EST Height AGL (m) Height AGL (m) Temperature (C) Temperature (C) Total Particle Count Descent 2 February 2004, EST TSI CPC Model 3007 Total Particle Count Ascent 2 February 2004, EST TSI CPC Model Height AGL (m) Height AGL (m) #/cm 3 #/cm 3

12 Case Studies: 2 FEB 2004 Surface Quantities

13 Case Studies: 5 FEB 2004 (nighttime stratification)

14 Case Study: 5 FEB 2004

15 Case Studies: 5 FEB 2004

16 Case Studies: 5 FEB 2004

17 Case Studies: 5 FEB 2004

18 Case Studies: 5 FEB 2004 Surface Quantities

19 Case Studies: 5 FEB 2004 Surface Meteorology

20 Meteorology Drives Everything! Thank you Questions?