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Tbilisi, 6.08.2012 Ketevan Kasradze Supervisor: PD Dr. Hendrik Elbern Rhenish Institute for Environmental Research.

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Presentation on theme: "Tbilisi, 6.08.2012 Ketevan Kasradze Supervisor: PD Dr. Hendrik Elbern Rhenish Institute for Environmental Research."— Presentation transcript:

1 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze kk@riu.uni-koeln.de Supervisor: PD Dr. Hendrik Elbern Rhenish Institute for Environmental Research at the University of Cologne Germany 4D-var assimilation of CRISTA-NF H20 and MLS retrievals with the high resolution SACADA system

2 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Why? 4Dvar data assimilation SACADA assimilation-system Horizontal grid Vertical grid Chemistry Assimilation Results 2/18

3 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Atmospheric layers 3/18

4 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Why? 4/18

5 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Data assimilation „using all the available information, to determine as accurately as possible the state of the atmospheric (or oceanic) flow” Talagrand (1997) available information: – observations – background 5/18

6 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Data assimilation 1st day 2nd day t Xa Xb Background Analysis Xb 6/18

7 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Background error covariance matrix 54x23 042 ~ 1x10^6 BECM ~ 4x10^11 for 51 species ~ 80 Terrabyte Cost function Vector of observations Observation error covariance matrix Projection operator Background Model operator Gradient Adjungiertes Modell Quasi-Newton method L-BFGS SACADA assimilation-system 7/18

8 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze SACADA assimilation-system Background Meteorological ECMWF analyses Trace gas observations Analysis SACADA PREP DWD GME CTM CTMad Diffusion L-BFGS 8/18

9 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Horizontal GME Grid ~147km between the grid points, 23 042 grid points pro Model layer 9/18

10 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Additional refinement troposphere/lower stratosphere SACADA Vertical Grid 54 layer CRISTA-NF MLS 10/18

11 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Chemistry H 2 O 2 H 2 O NO 3 N 2 O N 2 O 5 HNO 3 HNO 4 Cl 2 O 2 OClO Cl 2 HCl HOCl ClONO 2 BrCl HBr HOBr BrONO 2 O( 1 D) O( 3 P) O 3 H OH HO 2 NO NO 2 Cl ClO Br BrO H 2 CH 4 CH 3 Cl CCl 4 CFCl 3 CF 2 Cl 2 CHF 2 Cl CF 2 ClCFCl 2 CH 3 CCl 3 CH 3 Br CF 2 ClBr CF 3 Br CH 2 O CH 3 O CH 3 O 2 CH 3 OOH CH 3 HCO CO O 2 N 2  51 species  200 chemical reaction equations  Reaction rates: JPL 2006 recommendations KPP (Kinetic Preprocessor) ROS2 Chemistry Module Adjoint Chemistry Module 11/18

12 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze SCOUT-O3 campaign Stratospheric-Climate Links with Emphasis on the UTLS - O3 November-December 2005 AMMA- campaign African Monsoon Multidisciplinary Analyses 29.07.2006 -17.08.2006 12/18

13 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Assimilation Results Background – Derived from SOCRATES (=2D) model results (1-st day) – At the following day: Analyses of the day before Observations – MLS retrievals – CRISTA-NF retrievals Analyses – Ozone analyses from SACADA for 7.11.2005 Pressure level 30 (~ 137hPa) – H2O profiles from SACADA for 29.07.2006 13/18

14 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Analysis Observation Background Ozone O 3 7.11.2005 ~137hPa ~14km 12 h UTC 14/18

15 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze CRISTA-NF - Background MLS 29.07.2006 Asm: H 2 O 20km 10km 20km 10km 15/18

16 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Computational costs Fine grid (ni=48, lev=54) with new chemistry mechanism, timestep: 800sec. 1 day assimilation: – ~50 GB temporary storage – ~10 clock hour (16 AMD OPTERON processor) 16/18

17 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Acknowledgements to: Garmany. University of Cologne. Rhenish Institute for Environmental Research at the University of Cologne. Prof A. Ebel, Prof A. Wahner, Dr. J. Schwinger, all my co-workers and especially my supervisor Dr. H. Elbern. Tbilisi State University. Applied mathematics and computer sciences department stuff. Prof. R. Botchorishvili, Dr. M. Menteshashvili.

18 Tbilisi, 6.08.2012 www.riu.uni-koeln.de Ketevan Kasradze Thank you! Danke schön! დიდი მადლობა !

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