Assessment of the stratospheric NO₂ column using long-term ground-based UV-visible and satellite nadir observations

Gaia Pinardi (1) , Michel van Roozendael (1) , Jean-Christopher Lambert (1) , Francois Hendrick (1) , José Granville (1) , Frederik Tack (1) , Florence Goutail (2) , Jean-Pierre Pommereau (2) , Andrea Pazmino (2) , Folkard Wittrock (3) , Andreas Richter (3) , Thomas Wagner (4) , Myojeong Gu (4) , Udo Friess (5) , Monica Navarro (6) , Olga Puentedura (6)

1 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique
2 STRATO - LATMOS
3 IUP - Institute of Environmental Physics [Bremen]
4 MPIC - Max Planck Institute for Chemistry
5 Institut für Umweltphysik [Heidelberg]
6 INTA - Instituto Nacional de Técnica Aeroespacial

Zenith-sky UV-visible instruments have been used to monitor stratospheric NO₂ columns from pole to pole for more than 2 decades, as part of the Network for the Detection of Atmospheric Composition Change (NDACC). Long-term monitoring and fit-for-purpose data quality are essential commitments of the network. Recently, recommendations were made for a better harmonization of the retrieval of NO₂ stratospheric vertical columns (Van Roozendael and Hendrick 2012, http://ndacc-uvvis-wg.aeronomie.be/tools/NDACC_UVVIS-WG_NO2 settings_v4.pdf). Those include, in addition to the use of harmonized SCD settings, a common approach to the air-mass factor (AMF) calculation, based on pre-calculated look-up tables of climatological AMFs resolved in latitude, time, wavelength, surface albedo, solar zenith angle and station altitude.

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]

Gaia Pinardi, Michel van Roozendael, Jean-Christopher Lambert, Francois Hendrick, José Granville, et al.. Assessment of the stratospheric NO₂ column using long-term ground-based UV-visible and satellite nadir observations. EGU General Assembly 2015, Apr 2015, Vienna, Austria. pp.EGU2015-6348. ⟨insu-01144028⟩