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ADOMOCA Meeting Novembre 2008 D. Cariolle

ADOMOCA Meeting Novembre 2008 D. Cariolle. The linerized ozone scheme [ Cariolle and Déqué, JGR, 1986; Cariolle et Teyssèdre, ACPD, 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 A 1 = (P-L) : Production-Loss rate

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ADOMOCA Meeting Novembre 2008 D. Cariolle

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  1. ADOMOCA Meeting Novembre 2008 D. Cariolle

  2. The linerized ozone scheme [Cariolle and Déqué, JGR, 1986; Cariolle et Teyssèdre, ACPD, 2007]  rO3 /  t = A1 + A2 (rO3 - A3) + A4 (T – A5) + A6 ( - A7) + A8 rO3 A1 = (P-L) : Production-Loss rate A2 =  (P-L) /  rO3 A3 ; rO3 : ozone mixing ratio A4 =  (P-L) /  T A5 ; T : temperature A6 =  (P-L) /   A7 ;  : ozone column A8 = - Khet 2D coefficients ( , p) from the 2D photochemical Model (MOBIDIC) quadratic function of total chlorine

  3. 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) ; rO3 ; T ;  • perturbations +/- 10%;+/- 10 K => new equilibrium:  (P-L) /  rO3 ; •  (P-L) /  T ;  (P-L) /  

  4. Version 2.1 Original: Version 1.0

  5. Version 2.1 A8 = - Khet Khet = (1/8days)(Clx/2ppbv)2 (daytime and T<195K)

  6. COLD AIR TRACER • x/  t = 1/1 (1-x) – 1/ 2 x With 1equal to a few hours and 1/ 2=0 if T<195 K And 2equal to several days (rate of HNO3 destruction) and 1/ 1=0 if T> 195K  rO3 /  t = A1 + …. + A8 rO3 T>195 K T<195 K With A8 = - Khet .x. (195/T) 4,5 (daytime)

  7. v2 without cold tracer v2 with cold tracer

  8. Analyse CEPMMT 5/11/2007

  9.  rO3 /  t = A1 + A2 (rO3 - A3) + A4 (T – A5) + A6 ( - A7) + A8 rO3 • + B1 (rNOx - B2) • + B3 (rCO - B4) • + B5 (rH2O - B6) • B1 =  (P-L) /  rNOy ; B3 =  (P-L) /  rCO ; B5 =  (P-L) /  rH2O • B2 = rNOy ; B4 = rCO ; B6 = rH2O from the 2D photochemical rNOy - B2 or (rNOy - B2)/B2 from aircraft, boats, road traffic scenarios and CTM. Idem for CO and H2O

  10. Destruction • in the upper • stratosphere • Production • in the lower stratosphere and troposphere

  11. Destruction in • most of the stratosphere

  12. Rapid evaluation at steady state: ∆rO3 (%) = (- B1 B2 /A1A2 )∆rNOy(%) Or ∆rO3 (%) = (- B3 B4 /A1A2 )∆rCO(%) Or ∆rO3 (%) = (- B5 B6 /A1A2 )∆rH2O(%)

  13. The linerized CO and HNO3 schemes  rx/  t = A1 + A2 (rx - A3) + A4 (T – A5) A1 = (P-L) : Production-Loss rate A2 =  (P-L) /  rx A3 ; rx: CO or HNO3 mixing ratio A4 =  (P-L) /  T A5 ; T : temperature 2D coefficients ( , p) from the 2D photochimical Model (MOBIDIC)

  14. Assimilation: • CO: • ODIN, MLS profiles • MOPIT, IASI columns • HNO3: • MLS profiles • IASI columns

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