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Application of OMI tropospheric NO2 for air quality monitoring in Northern Europe: shipping and land-based case studies Iolanda Ialongo (FMI) Hakkarainen,

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Presentation on theme: "Application of OMI tropospheric NO2 for air quality monitoring in Northern Europe: shipping and land-based case studies Iolanda Ialongo (FMI) Hakkarainen,"— Presentation transcript:

1 Application of OMI tropospheric NO2 for air quality monitoring in Northern Europe: shipping and land-based case studies Iolanda Ialongo (FMI) Hakkarainen, J. Jalkanen, J.-P., Johansson, L., Tamminen, J. (FMI) Boersma, F. (KNMI) Krotkov, N. (NASA)

2 Motivation Use of satellite data for air quality at high latitude is poorer than at lower latitudes Interest in evaluating OMI applicability in critical situations (i.e. low solar angle, no illumination, signal close to the detection limit) New emission regulation upcoming for shipping in Baltic Sea ESA IAP-FS SAMBA: SAtellite Monitoring of ship emissions in the Baltic seA OMI STM – De Bilt, 11-13 March 2014

3 Data OMI tropospheric NO2 SP V2 OMI data selected according to the wind direction and speed. Wind data from ECMWF reanalysis averaged below 950 hPa. STEAM ship emissions derived from AIS data Time range: Summer 2005-2011 Region: LAT 50-70°N LON 1-34°E (Northern Europe) OMI rows: 6:24 OMI STM – De Bilt, 11-13 March 2014

4 Metodology: NO2 sources in Finland from OMI Shipping lane The main cities are marked by their initial Some information can be lost removing the background Red pixels indicate NO2 levels higher than the local background. 3. Subtracting the local background from the NO2 values, further enhances the NO2 signal. 2. Considering only weak wind conditions, helps in detecting the NO2 sources 1. High resolution NO2 maps can be derived using multiple pixels averaging techniques.

5 OMI tropospheric NO2: time series All winds (continuous lines) Weak winds (dashed lines) OMI STM – De Bilt, 11-13 March 2014

6 Helsinki OMI STM – De Bilt, 11-13 March 2014 The effect of different wind directions in the city of Helsinki

7 Calculation of life time and emission parameter Helsinki Life time: τ = (3.0 ± 0.5) h Emission (burden parameter): E = (1.0 ± 0.1) 10^28 molec Fitting linear density as in Beirle et al. (2011) OMI STM – De Bilt, 11-13 March 2014

8 The effect of different wind directions in central Baltic Sea all windsweak windswesterlies High NO2 signal along East-West direction OMI STM – De Bilt, 11-13 March 2014

9 OMI NO2 tropospheric column STEAM NOx emissionOMI NO2NOx emission Jul-Aug averages within the black boxes Both OMI NO2 and STEAM emissions show a decrease in 2009 (economical recession) Comparison with ship emission data over Baltic Sea OMI STM – De Bilt, 11-13 March 2014

10 Emission hotspots: case-studies OMI STM – De Bilt, 11-13 March 2014

11 Gulf of Finland: OMI NO2

12 Gulf of Finland: OMI NO2 + STEAM NOx emissions

13 Detection of emission hotspot in Northern Europe Pori port and city center OMI STM – De Bilt, 11-13 March 2014

14 Detection of emission hotspot in Northern Europe Pori port and city center Overlap with STEAM ship emissions OMI STM – De Bilt, 11-13 March 2014

15 Detection of emission hotspot in Northern Europe Iron mines in Murmansk area OMI STM – De Bilt, 11-13 March 2014

16 Detection of emission hotspot in Northern Europe Iron mines in Kostomuksha OMI STM – De Bilt, 11-13 March 2014

17 Detection of emission hotspot in Northern Europe Kemi-Tornio area OMI STM – De Bilt, 11-13 March 2014

18 Conclusions OMI tropospheric NO2 shows sensitivity to small emission sources at high latitudes Time series of OMI data and ship emissions from STEAM model are in good agreement OMI data are able to reproduce the variability of the economy activity in terms of reduced ship traffic in the Baltic Sea area Future applications includes the comparison with land-based emission dataset OMI STM – De Bilt, 11-13 March 2014

19 Thank you Reference Ialongo, I., Hakkarainen, J., Hyttinen, N., Jalkanen, J.-P., Johansson, L., Boersma, F., Krotkov, N., and Tamminen, J.: Characterization of OMI tropospheric NO 2 over the Baltic Sea region, Atmos. Chem. Phys. Discuss., 14, 2021-2042, doi:10.5194/acpd- 14-2021-2014, 2014. Website https://dl.dropboxusercontent.com/u/108873735/site/no2_web.html

20 Extra slides OMI STM – De Bilt, 11-13 March 2014

21 Comparison with EMEP emission in Finland maps

22 OMI STM – De Bilt, 11-13 March 2014 EMEP emission by sector TOTAL

23 OMI STM – De Bilt, 11-13 March 2014 Comparison with EMEP emission in Finland pixel-by-pixel comparison

24 OMI STM – De Bilt, 11-13 March 2014 Comparison with EMEP emission in Finland timeseries

25 OMI STM – De Bilt, 11-13 March 2014 Comparison with EMEP emission in Finland timeseries G_roadrailA_PublicPowerB_IndustrialComb

26 OMI STM – De Bilt, 11-13 March 2014 Other google maps data Large point source (EMEP)

27 OMI STM – De Bilt, 11-13 March 2014 Other google earth data Mines MINING ATLAS

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