Model study of the impact of updated European biogenic emission inventory from NatAir on air quality using Chimere chemistry-transport model

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Model study of the impact of updated
Europeanbiogenic emission inventory from NatAir
on air qualityusing Chimere chemistry-transport
model

• Gabriele Curci
• curci_at_lisa.univ-paris12.fr

http//www.lisa.univ-paris12.fr/
M. Beekmann1 R. Vautard2 G. Smiatek3 R.
Steinbrecher3 H. Pfeiffer4 J. Theloke4 R.
Friedrich4 1 LISA 2 LSCE 3 IMK-IFU 4 IER
EGU General Assembly Vienna 15-20 April 2007
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NatAir Project

• Natural and Biogenic Emissions and Assessment of
  Impacts on Air Quality (NATAIR) European FP6
  project coordinated by IER (Germany) due to
  finish at the end of June 2007
• Main objective estimation of fraction of
  atmospheric pollutants over Europe which can be
  attributed to natural/biogenic emissions
  (incompressible part of air quality)
• Development of state-of-the-art biogenic emission
  inventory 10 km resolution on the European
  domain
• Sources included
• Biogenic VOCs isoprene speciated terpenes and
  others
• NO from soils
• Forest fires
• Wind blown dust
• Lightning
• Spores bacteria
• Animals
• Wetlands
• Sea salt and DMS
• Volcanoes
• Geological seapages

http//natair.ier.uni-stuttgart.de/
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BVOC Emissions July 1997
ISOPRENE
TERPENES
1163 Gg C
1110 Gg C
STANDARD modified Simpson 99
1010 C cm-2 s-1
1467 Gg C
941 Gg C
NATAIR
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Surface O3 Max from BVOC (JJA 1997)
http//euler.lmd.polytechnique.fr/chimere/
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Production of O3 from BVOC
Animation of hourly contribution of BVOC to
surface ozone starting from zero BVOC
emissions. Ozone is produced mainly inland and
near the coasts (gt20 ppbv locally) Ozone builds
up over the sea because of its longer lifetime
in the marine boundary layer.
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Seasonal cycle of O3 Max from BVOC (1997)
APR
MAY
JUN
JUL
AUG
SEP
0 1 2 3 4 6 8 10 15 20
ppbv
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Interannual variability of O3 Max from BVOC (JJA)
1997
2000
2001
2003
ppbv
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Sensitivity of O3 from BVOC to biogenic NO
emissions
w/o bio NO emissions
w/ bio NO emissions
The predicted impact of BVOC emissions is
enhanced in some regions by up to 3 ppb Zeroing
NO bio emissions means probably underestimating
the impact of BVOC emissions on ozone in some
regions
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Extreme Event July-August 2003
!
Large episodic contribution from BVOC emissions
to ozone throughout the Mediterranean basin Up to
100 µg/m3 in one extreme case in
Spain! Observations from EMEP and AirBase
databases
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Impact of BVOC on air-quality standards
Ozone produced from BVOC oxidation increases the
frequency of 8-h O3 values above the threshold of
120 µg/m3 by 12
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21
25
120
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Conclusions

• The new NatAir BVOC inventory has reduced
  isoprene emissions and increased terpene
  emissions with respect to current inventory
  (Simpson 99)
• The calculated impact of BVOC on average summer
  ozone levels is maximum in the Mediterranean
  basin (6-8 ppbv) with peaks of 20 ppbv
• In particular events the impact can be 50 ppbv
• BVOC increase the frequency of 8-h ozone by about
  10
• The impact of BVOC is sensitive to biogenic NO
  emissions (up to 3 ppbv)

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Extras
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(No Transcript)
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Comparison vs ground obs (JJA 2001)
EMEP http//www.emep.int
AirBase http//air-climate.eionet.europa.eu/data
bases/airbase/
BIAS
Using NatAir BVOC emissions reduces RMS and Bias
and increases temporal correlation Improvement in
NW and Central Europe worsening in Iberian
Peninsula
Corr
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Fractional contribution of Isoprene and Terpenes
to Ozone Max (JJA 2003)
O3 adding ISOPRENE to CTRL
O3 adding TERPENES to CTRL
The share of BVOC impact on O3 max is roughly
2/3 ISOPRENE and 1/3 TERPENES Over Po Valley
about 1/2 ISOPRENE and 1/2 TERPENES