YAKAerosib : Study on tropospheric composition over Siberia

1
YAK-Aerosib Study on tropospheric composition
over Siberia

• Jean-Daniel Paris1
• Ph. Nedelec2, M. Ramonet1, G. Golytsin3, B.
  Belan4, M. Arshinov4, G. Athier2, F. Boumard1,
  J.-M. Cousin2 , et Ph. Ciais1

Jean-Daniel.Paris_at_cea.fr

• Thanks
• Robert Vautard LSCE
• MM5-Chimere
• Gregoire Cayez Lab. dAérologie
• Andreas Stohl NILU, Norvège
• Flexpart
• Frederic Chevallier LSCE
• données ECMWF
• Joyce Harris NOAA, USA
• clusters Hysplit

1 Laboratoire des Sciences du Climat et de
l'Environnement IPSL, CEA-CNRS-UVSQ, Saclay 2
Laboratoire dAérologie UPS-CNRS, Toulouse 3
Institute of Atmospheric Physics RAS, Moscow,
Russia 4 Institute of Atmospheric Optics SB-RAS,
Tomsk, Russia
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Background Goals

• Background
• Siberia represents 32 of global soil carbon
  pool. Sink estimated 0.0 1.0 GtC.yr-1
• (Gurney, Nature, 2002)
• Extratropical Asia is scarcely touched by studies
  on atmospheric transport in the Northern
  hemisphere
• (Akimoto, Science, 2003)
• Goals
• Bring new constraints on Siberian CO2 sources and
  sinks
• Characterize the variability of ozone and CO at
  the continental scale.

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Antonov-30 platform
Flight ceiling 8100 m Flight duration 8
hr Endurance 3400 km Max flight speed 540
km/h Speed during measurements 300 km/h Runway
length 1300 m Aircraft crew 7 pilots Science
crew lt10 persons Aircraft length 24.3
m Aircraft height 8.3 m
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Intensive airborne campaigns first measurements
1.

• YAK.1/11-14 April 2006
• YAK.2/7-10 September 2006
• Profiles
• CO2, CO O3

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Instrumental Setup
CURRENTLY OPERATED
CO2 LSCE, Saclay. In operation
CO O3 LA, Toulouse. In operation
Antonov 30 IAO, Tomsk (shown Inlet)
TO BE DEPLOYED
Flask sampler MPI-BGC, Jena. Ready
Methane LSP, Grenoble. Test phase
CO2 13C isotope LPMAA, Paris. Test phase
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Flight pattern

• 3 days of flight
• 2-8 vertical legs per flight
• from 500 to 7000 m agl
• 8000km across Siberia

7km
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Meteorological conditions, april
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Meteorological conditions, sept.
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Average profiles
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mozaic
Data Valérie Thouret, L.A., pers. comm.
spring
summer
Fall
winter
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Pollutants transport in Siberia
2.
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Anthropic emissions origines during the campaigns

• Flexpart (ECMWF fields)

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Polluted layers detection

• Stratification, polluted filaments over 500km in
  the horizontal

60N-120E
3nmltdplt70nm dpgt70nm
Aerosol number conc, cm-3
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April N-E China affect CO over Siberia
YAK1 Mopitt
173 ppb
190 ppb
YAK1 4-6km, flight segment average MOPITT
April average at 500hPa
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From China to Siberia

• Flexpart retroplume 10 days back
• Interception of a polluted dust storm

2002 MODIS/Terra
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Chemistry transport eulerian study

• Regional CTMMM5-Chimere
• 1.0 x 0.75,
• 10 levels
• ?CO (anomaly from N-E China emissions)
• defined as (reference run) minus (run with all
  but NE Chinese emissions)
• YAK trajectory shown

2006/04/12, 0400GMT z 3000-5000m
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Chinese pollutant export episode toward
Sibérie and Taiwan
DCO

• Hovmöller diagram of the event
• simulation MM5-Chimere

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OMI Aerosol index
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WCB frequency to East Siberia
3-yr Climatology of air masses monthly
origin September 2003-2005 Hysplit
backtrajectories cluster analysis,
september (Joyce Harris, NOAA)
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CO2 variability
3.
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CO2 CO correlation
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7 September 2006 as an example

• Zonal flux, crossing a weak front
• High variability between consecutive CO2 profiles

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CO2 Boundary layer variogram
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Conclusion Perspectives

• Presentation of YAK campaigns and data
• Continental variability of CO2 during growth
  season strongly affected by synoptic conditions
• Pollutants transport des in Siberia chinese
  episode, european transport
• Evolving
• Using MM5-Chimère to quantify flux of pollutants
  toward Siberia (climatology, event-based)
• Characterization of transport for the study of
  CO2 fluxes, lagrangian model, CO surrogate tracer
• Inversion (LPDM?) to better constrain CO2
  sources and sinks
• Contribution to Polarcat
• Provide an (almost) off the shelf campaign in
  Siberia equipped with instruments for CO2, CO,
  ozone, aerosols number conc.,
• Advantage blank spot in observation networks
• Limitations new instruments? Difficulty to
  change flight route?