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Transatlantic transport of tropospheric NO2

   
 
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page last modified:
13 March 2009
   

Introduction

In order to test the long-range transport observations and model results the location of Mace Head station is used. The Mac Head station is located at the West coast of Ireland in a relatively clean environment. High concentrations of pollutants at the station usually originates from long-range transport events.

More information on the Mace Head station can be found here.
  

Overpass data

Satellite (OMI and GOME-2) observations of tropospheric NO2 columns within 50 km of Mace Head:

Station                       Longitude       Latitude       OMI             GOME2      
Mace_Head -9.90 53.33 Mace_Head_domino.dat Mace_Head_gome2no2.dat
 

Timeseries of the satellite observations of NO2


All overpass data for 2008 within 50 km of the station and with a cloud radiance factor of less than 50 %.

Timeseries of the FLEXPART calculations for NO2


This figure shows the partial column concentrations of NO2 above Mace Head station which can be attributed to long range transport of NO2 from North America, as simulated by the FLEXPART trajectory simulation program. Due to the limited lifetime of NO2 it can only cross the Atlantic Ocean when meteorological conditions (such as temperature and wind speed) are optimal.

Documentation and background information