[1] Platt U 1999 Phys. Chem. Chem. Phys. 1 5409

[2] Noxon J F 1975 Science 189 547

[3] Solomon S and Schmeltekopf A L 1987 J. Geophys. Res.
92 8311

[4] Aliwell S R et al %, Roozendael M V, Johnston P V, Richter A, Wagner T,
%Arlander D W, Burrows J P, Fish D J, Jones R L, T\o rnkvist K K, Lambert
%J C, Pfeilsticker K and Pundt I
2002 J. Geophys. Res.
107 4199

[5] H\"onninger G, Friedeburg C V and Platt U 2004 Atmosph. Chem.
Phys. 4 231

[6] Wagner T et al %, Dix B, Friedeburg C V, Frie\ss U, Sanghavi
%S, Sinreich R and Platt U
2004 J. Geophys. Res. 109 D22205

[7] H\"onninger G and Platt U 2002 Atmospheric Environment
36 2481

[8] Friedeburg C, Platt U and Wagner T 2005 Atmospheric
Environment 39 967

[9] Stutz J and Platt U 1996 Appl. Opt. 35 6041

[10] Grainger J F and Ring J 1962 Nature 193 762

[11] Fish D J and Jones R L 1995 Geophys. Res. Lett. 22 811

[12] Sinreich R, Frie\ss U, Wagner T and Platt U 2005 Faraday
Discuss. 130 153

[13] Greenblatt G D et al %, Orlando J J, Burkholder J B and Ravishankara A R
1990 J. Geophys. Res. 95 18577

[14] Vandaele A C et al
%, Hermans C, Simon P C, Carleer M, Colin R, Fally S, M\'erienne M F,
%Jenouvrier A and Coquart B
1998 J. Quant. Spectrosc.
Radiat. Transfer 59 171

[15] Bogumil K et al %, Orphal J, Homann T, Voigt S, Spietz P,
%Fleischmann O C, Vogel A, Hartmann M, Bovensmann H, Frerik J and
%Burrows J P
2003 J. Photochem. Photobiol. A 157 167