Bae-146 ADIENT flight summaries, publication goals and future plans

Hugh Coe, Ellie Highwood, Gavin McMeeking, William Morgan and

Megan Northway

Overview

1. Where/when we flew2. Data status/summary3. Publication goals

1. High pressure characterisation2. Black carbon and mixing state3. Organics composition4. Nitrate and its influences5. Optical properties6. Radiation case study

4. June flying plans

13 December 2007

18 December 2007

19 December 2007

2 April 2008

16 April 2007

10 May 2008

18 September 2008

19 September 2008

23 September 2008

24 September 2008

23 September 2008

Mean scattering coefficient (550 nm) for all low-level (<3000 feet) periods

Baltic

Radiation flight(Ireland)

High pressure system

DEC 07

APR 08

SEP 08

Data status table

ADIENT EUCAARI ADIENTInstrument B333 B334 B335 B355 B356 B357 B362 B363 B364 B365 B366 B367 B368 B369 B370 B371 B372 B373 B374 B379 B380 B401 B402 B404 B405 B406

13/12/07 18/12/07 19/12/07 2/4/08 10/4/08 16/4/08 6/5/08 6/5/08 7/5/08 8/5/08 8/5/08 9/5/08 10/5/08 10/5/08 12/5/08 12/5/08 13/5/08 13/5/08 14/5/08 21/5/08 22/5/08 18/9/08 19/9/08 23/9/08 24/9/08 25/9/08

AMS no org heater CVI

SP-2 CVI

SMPS

PCASP

CO

PSAP (corrected)

Neph (corrected)

Radiometers

Instrument performance good, data in final formInstrument performance good, data require processingInstrument performance questionableInstrument performance poor or installed

Bae-146 data status/summary(http://personalpages.manchester.ac.uk/staff/gavin.mcmeeking/datastatussummary.html)

Paper 1: Characterisation of aerosol properties during the high pressure

period of EUCAARI-LONGREX• Lead: Thomas Hamburger (DLR)• Summary: Describe meteorological conditions

and aerosol physical properties during the high pressure system dominant 5-14 May (EUCAARI-LONGREX)

• Combine PCASP, SMPS, CPC and OPC (sizing) data from the BAe-146 and the DLR Falcon

600

600

Sources of aerosol sizing information on the -146.

Example of re-processed SMPS data (B366).

AIM

“fixe

d”AI

M“fi

xed”

Paper 2: Measurements of black carbon and its mixing state over northern Europe

• Lead: Gavin McMeeking (Manchester)• Summary: Describe spatial and temporal

distributions of black carbon measured by the SP-2 during ADIENT and EUCAARI-LONGREX.

• Also examine extent of black carbon mixing state (coating thickness, number of coated particles) in the near-field and far-field regimes.

• Status: Need final, re-processed SP-2 data (issues related to flow at high altitudes)

Single particle soot photometer

Schwarz et al. [2006], JGR

Incandescence channel: Measure of BC mass loading (and volume equivalent diameter if density is assumed).Result: BC size distributions and mass/number concentrations (limited size range).

Scattering channel: Measure of aerosol size and coating thickness (for particles with BC core).Result: “Scattering aerosol” size distribution and mass/number concentrations. Coating thickness!

Examples spatial distribution

Example of similar analysis

From Schwarz et al. [2008], GRL

Ratio of SP-2 scatter volume / neph scattering during EUCAARI

Clear altitude dependence (B366)

ADIENT June 2009 flying period

ADIENT June 2009 flying period

• 26 May – 2 July 2009• ~50 hours• Operating in conjunction with:– VISURB: 12-15 hours– APPRAISE Clouds: 20 hours– Cirrus project: 15 hours

• Have requested weekend flying, double crews to maximize flying in the window

General approach

• Flexibility: “Fly the best mission for the conditions”– Round Britain (e.g., B406)– Coastal work in easterly or westerly conditions

• M-25 special case study• Suitcase opportunities: short overnights to

find clear sky conditions suitable for radiation flights

M-25 case study• Work in tandem with a vehicle-based lidar moving

(or not) along the M-25 (J. Haywood, MetOffice)

Important additions/changes to aircraft payload

• Retrofitted PCASP (better flow monitoring and channel resolution/electronics)

• Mini-lidar (?)• Upgraded SMPS software (built in flow and

pressure corrections, real-time access during flights)

• Upgraded cTOF-AMS software (Fast-MS mode)• SP-2 flow control fixed• More/better calibrations