ADOMOCA Annual Meeting Novembre 2007 D. Cariolle

The linerized ozone scheme [Cariolle and Déqué, JGR, 1986; P. Simon 2001; Cariolle, 2004]  r O 3 /  t = A 1 + A 2 (r O 3 - A 3 ) + A 4 (T – A 5 ) + A 6 (  - A 7 ) + A 8 r O 3 A 1 = (P-L) : Production-Loss rate A 2 =  (P-L) /  r O 3 A 3 ; r O 3 : ozone mixing ratio A 4 =  (P-L) /  T A 5 ; T : temperature A 6 =  (P-L) /   A 7 ;  : ozone column A 8 = - K het 2D coefficients ( , p) from the 2D photochemical Model (MOBIDIC) quadratic function of total chlorine

The 2D MOBIDIC model [Cariolle, CNRM, 1984 ; Teyssèdre, UPS, 1994] 2 dimensions (latitude, pressure) thermodynamic forcing from ARPEGE-Climat (T, v *, w * ) Stratospheric chemistry: 56 species, 175 reactions impact studies parameterisation of the ozone Production and Loss rates: At equilibrium => (P-L) ; r O 3 ; T ;  perturbations +/- 10%;+/- 10 K => new equilibrium:  (P-L) /  r O 3 ;  (P-L) /  T ;  (P-L) /  

Version 2.1Original: Version 1.0

Version 2.1 A 8 = - K het K het = (1/8days)(Clx/2ppbv) 2 (daytime and T<195K)

 x /  t = 1/  1 (1-x) – 1/  2 x With  1 equal to a few hours and 1/  2 =0 if T<195 K And  2 equal to several days (rate of HNO3 destruction) and 1/  1 =0 if T> 195K COLD AIR TRACER T<195 K T>195 K  r O 3 /  t = A 1 + …. + A 8 r O 3 With A 8 = - K het. x. (195/T) 4,5 (daytime)

v2 without cold tracer v2 with cold tracer

Analyse CEPMMT 5/11/2007

 r O 3 /  t = A 1 + A 2 (r O 3 - A 3 ) + A 4 (T – A 5 ) + A 6 (  - A 7 ) + A 8 r O 3 + B 1 (r NO x - B 2 ) + B 3 (r CO - B 4 ) + B 5 (r H2O - B 6 ) B 1 =  (P-L) /  r NO y ; B 3 =  (P-L) /  r CO ; B 5 =  (P-L) /  r H2O B 2 = r NO y ; B 4 = r CO ; B 6 = r H2O from the 2D photochemical r NO y - B 2 or (r NO y - B 2 )/ B 2 from aircraft, boats, road traffic scenarios and CTM. Idem for CO and H2O

Destruction in the upper stratosphere Production in the lower stratosphere and troposphere

Destruction in most of the stratosphere

Rapid evaluation at steady state: ∆r O 3 (%) = (- B 1 B 2 / A 1 A 2 )∆ r NO y (%) Or ∆r O 3 (%) = (- B 3 B 4 / A 1 A 2 )∆ r CO (%) Or ∆r O 3 (%) = (- B 5 B 6 / A 1 A 2 )∆ r H 2 O (%)

The linerized CO and HNO3 schemes  r x /  t = A 1 + A 2 (r x - A 3 ) + A 4 (T – A 5 ) A 1 = (P-L) : Production-Loss rate A 2 =  (P-L) /  r x A 3 ; r x : CO or HNO3 mixing ratio A 4 =  (P-L) /  T A 5 ; T : temperature 2D coefficients ( , p) from the 2D photochimical Model (MOBIDIC)

Assimilation: CO: ODIN, MLS profiles MOPIT, IASI columns HNO3: MLS profiles IASI columns