1. DLR POLARCAT Spring/Summer Experiment 2008
Hans Schlager & Andreas Minikin
DLR-Institute of Atmospheric Physics, Oberpfaffenhofen (
Objectives:
to investigate the impact of urban and forest fire emissions
on the composition (trace gases, aerosols) of the
Arctic troposphere, in particular during Arctic haze and
wild fire seasons
to study pathways, mixing and vertical extent of pollution
plumes into/in the Arctic
to investigate transformations of trace gases and
aerosols in aging pollution plumes (with PFT experiment)
to study the impact of forest fire emissions in the LS,
in particular after injection by pyroCbs

2. Research Aircraft: DLR Falcon
(range: 3000 km, endurance: 4hrs)
Base in Spring 08 campaign: Kiruna, Sweden
Base in Summer 08 campaign: Oberpfaffenhofen, Germany
Total flight hours: 40 (~ 10 flights)

4. DLR POLARCAT Spring/Summer Experiment 2008
Falcon trace gas instrumentation (PI: Schlager)
Chemical species Technique
O3 UV absorption
H2O Lyman - alpha
CO VUV fluorescence
CO2 IR absorption
HCHO Hantzsch reaction
NO, CL (gas-phase)
NO2 CL (liquid)
NOy CL + reduction converter
HNO3 CIMS (IT)
PAN TD-CIMS
SO2 CIMS (IT)
PFC GC, CIMS

5. Estimated dilution of a PFC tracer in the upper troposphere

6. Brazil
Western Europe
Northern Australia

7. DLR POLARCAT Spring/Summer Experiment 2008
Falcon aerosol instrumentation (PI: Minikin)
Parameter Technique
Nucleation/Aitken mode 6-channel CPC system
particle size distribution, (unheated, heated)
non-volatile particle fraction
Accumulation/Coarse mode DMA, Aerosol spectrometer probes
particle size distribution (PCASP-100X, FSSP300)
Aerosol scattering coefficient Integrating nephelometer

8. Covered particle sizes: 5 nm - 20 µm

9. Time line
Final decision on funding: DLR: July 07
HGF: Sept. 07
Decision on campaign sites: Sept/Okt. 2007
and payload
Spring deployment: 25 March - 11 April 08
Summer deployment: June 08