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Gabriele Curci curci@lisa.univ-paris12.fr Model study of the impact of updated European biogenic emission inventory from NatAir on air quality using Chimere.

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Presentation on theme: "Gabriele Curci curci@lisa.univ-paris12.fr Model study of the impact of updated European biogenic emission inventory from NatAir on air quality using Chimere."— Presentation transcript:

1 Gabriele Curci curci@lisa.univ-paris12.fr
Model study of the impact of updated European biogenic emission inventory from NatAir on air quality using Chimere chemistry-transport model Gabriele Curci 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 April 2007

2 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 NATAIR Project 28 November 2018 Gabriele Curci, LISA

3 “STANDARD” modified Simpson 99
BVOC Emissions July 1997 ISOPRENE TERPENES 1163 Gg C 1110 Gg C “STANDARD” modified Simpson 99 [1010 C cm-2 s-1] 941 Gg C 1467 Gg C NATAIR NATAIR Project 28 November 2018 Gabriele Curci, LISA

4 Surface O3 Max from BVOC (JJA 1997)
ΔO3 adding BVOC to CTRL STANDARD NATAIR ppbv CTRL O3: w/o Biogenic Emissions ppbv NATAIR Project 28 November 2018 Gabriele Curci, LISA

5 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 (>20 ppbv locally) Ozone builds up over the sea, because of its longer lifetime in the marine boundary layer. NATAIR Project 28 November 2018 Gabriele Curci, LISA

6 Seasonal cycle of O3 Max from BVOC (1997)
APR MAY JUN JUL AUG SEP ppbv NATAIR Project 28 November 2018 Gabriele Curci, LISA

7 Interannual variability of O3 Max from BVOC (JJA)
1997 2000 2001 2003 ppbv NATAIR Project 28 November 2018 Gabriele Curci, LISA

8 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 NATAIR Project 28 November 2018 Gabriele Curci, LISA

9 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 NATAIR Project 28 November 2018 Gabriele Curci, LISA

10 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% 9% 21% 25% 120 NATAIR Project 28 November 2018 Gabriele Curci, LISA

11 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) NATAIR Project 28 November 2018 Gabriele Curci, LISA

12 Extras

13 NATAIR Project 28 November 2018 Gabriele Curci, LISA

14 Comparison vs ground obs (JJA 2001)
EMEP  AirBase  BIAS Simulation RMS Bias Corr “Standard” BVOC em. 30.7 16.1 0.66 NatAir BVOC em. 30.0 14.8 0.67 Difference -0.7 -1.4 +0.01 Using NatAir BVOC emissions reduces RMS and Bias, and increases temporal correlation Improvement in NW and Central Europe, worsening in Iberian Peninsula Corr NATAIR Project 28 November 2018 Gabriele Curci, LISA

15 Fractional contribution of Isoprene and Terpenes to Ozone Max (JJA 2003)
ΔO3 adding ISOPRENE to CTRL ΔO3 adding TERPENES to CTRL The share of BVOC impact on O3 max is roughly /3 ISOPRENE and 1/3 TERPENES Over Po Valley about 1/2 ISOPRENE and 1/2 TERPENES NATAIR Project 28 November 2018 Gabriele Curci, LISA

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