SP2 Measurements during ACTIVE

1
SP2 Measurements during ACTIVE

• The SP2 uses Single Particle Laser Induced
  Incandescence to measure the mass loading of
  Black Carbon on a particle by particle basis.
• It is possible to determine the thickness of the
  coating on black carbon particles
• Scattering diameter is also derived from the
  instrument for particles greater than 200 nm.
• During ACTIVE, the incandescence signals were
  triggered using the scattering signal of single
  particles and so were not measured for sizes
  below 200 nm.
• The first deployment of the Manchester SP2 took
  place during ACTIVE
• It was deployed on the Egrett alternately with
  NOx
• It was not operated in a temperature and
  pressure controlled housing and so high altitude
  data are not reliable.
• Ascent profile data for particle size are
  available and have been quality assured and
  delivered for 8 flights between 27/11/05 and
  14/02/2006
• Black carbon mass loading profiles are available
  on only a limited number of these flights.

2

• SP2 data quality assured flights
• The flights and dates on which validated SP2
  data were collected is shown, together with the
  altitude range over which quality assured data
  were available.

Flight index Date Altitude
TE05 27/11/2005 0.6-12.5km
AE07 01/12/2005 4.5-12.5km
AE21 27/01/2006 4.5-11.5km
SE24 03/02/2006 4.5-13km
AE25 06/02/2006 4.5-13km
AE28 12/02/2006 5-10.7km
AE29 13/02/2006 4.5-9km
AE30 14/02/2006 0.5-3km
3
Line denotes mean value, error bar is s
4
A comparison with data taken on the ER2 aircraft
by Schwarz et al 2006.
Schwarz et al 2006
5
Comparison of Dornier and Egrett BC
Factor of 10?