evergreen wp 4200: model intercomparison on transport and chemistry
Post on 10-Jan-2016
27 Views
Preview:
DESCRIPTION
TRANSCRIPT
TM meeting, KNMI, 12 November 2003
EVERGREEN WP 4200: model intercomparison on transport and chemistry
Peter Bergamaschi (JRC IES)
Jan Fokke Meirink (KNMI)
Stefan Körner / Martin Heimann (MPI)
Jean Francois Muller (BIRA IASB)
TM meeting, KNMI, 12 November 2003
EVERGREEN WP4200 – overview
• 222Rn• SF6
• OH (full chemistry runs)• calibration of OH fields• single-tracer forwards runs for CH4 (CO, and CO2?)
TM meeting, KNMI, 12 November 2003
EVERGREEN WP4200 – atmospheric transport / chemistry models
TM3 (KNMI) TM3 (MPI) IMAGES
(BIRA-IASB) MOZART (UPMC)
TM5 (JRC)
horizontal resolution
3 x 2 5 x 3.8 5 x 5 6 x 4 (global) 1 x 1 (zoom over Europe)
vertical layers 25 hybrid (surface - 0.0 hPa)
19 hybrid (surface - 0.0 hPa)
25 sigma (surface - 50 hPa)
25 hybrid (surface - 0.0 hPa)
advection slopes scheme [Russel & Lerner, 1981]
slopes scheme [Russel and Lerner, 1981]
Semi-Lagrangian (2nd order) [Smolarkiewicz and Rasch, 1991]
slopes scheme [Russel and Lerner, 1981]
vertical diffusion PBL: [Holtslag and Boville, 1993] FT: [Louis et al., 1982]
Louis, 1979 PBL: [Muller and Brasseur, 1995]
PBL: [Holtslag and Boville, 1993] FT: [Louis et al., 1982]
convective cumulus clouds
Tiedke, 1989 Tiedke, 1989 [Muller and Brasseur, 1995] [Costen et al., 1988]
Tiedke, 1989
meteorology ECMWF ECMWF / NCEP ECMF (climatological) ECMWF
chemistry - offline - CBM4 based chem
- offline - chem (?)
- offline - IMAGES-chemistry
- offline - CBM4 based chem
NCEP
TM meeting, KNMI, 12 November 2003
EVERGREEN WP4200 – 222Rn protocol
• constant surface emissions of 1 atom cm-2 s-1 between -60o S and 60o N
• constant surface emissions of 0.5 atom cm-2 s-1 between 60o N and 70o N (except Greenland)
• no temporal variation
TM meeting, KNMI, 12 November 2003
222Rn surface June
TM meeting, KNMI, 12 November 2003
222Rn 750hPa June
TM meeting, KNMI, 12 November 2003
222Rn 500hPa June
TM meeting, KNMI, 12 November 2003
222Rn 250hPa June
TM meeting, KNMI, 12 November 2003
222Rn latitude vs. altitude June
TM meeting, KNMI, 12 November 2003
222Rn latitude vs. altitude December
TM meeting, KNMI, 12 November 2003
222Rn Freiburg
TM meeting, KNMI, 12 November 2003
222Rn Schauinsland
TM meeting, KNMI, 12 November 2003
222Rn Mauna Loa
TM meeting, KNMI, 12 November 2003
EVERGREEN WP4200 – SF6 protocol
• simulation 1994-2001
• emissions EDGAR V3.2 SF6 inventory for 1995 (atmospheric increase 1994-2001
approximately linear)
• initial field 1994 from MPI (TRANSCOM)
TM meeting, KNMI, 12 November 2003
SF6 surface June 2001
TM meeting, KNMI, 12 November 2003
SF6 latitude vs. altitude June 2001
TM meeting, KNMI, 12 November 2003
SF6 latitude vs. altitude December 2001
TM meeting, KNMI, 12 November 2003
SF6 stations
01/01/2001 observed TM3 TM3 IMAGES TM5(KNMI) (MPI) (BIRA IASB) (JRC)
BRW 4.85 4.80 4.77 4.92 4.82SPO 4.50 4.37 4.34 4.34 4.36
NH-SH 0.35 0.43 0.43 0.58 0.46
TM meeting, KNMI, 12 November 2003
Conclusions
222RN
• horizontal distribution similar for all 4 models
• synoptic variabiltity well reproduced by all TM models
• similar vertical mixing TM3(KNMI) and TM5
• TM3(MPI): stronger vertical mixing (exception: TM3(KNMI) / TM5 stronger regional convection in the tropics)
• significant influence at monitoring stations
SF6
• significant difference in interhemispheric mixing: TM-models similar, but IMAGES stronger gradient
• significant difference in troposphere – stratosphere exchange: TM3(KNMI) and TM5(JRC) strongest gradient stratosphere
TM meeting, KNMI, 12 November 2003
Outlook
• Finalisation 222Rn / SF6
• OH (full chemistry runs)• calibration of OH fields• single-tracer forwards runs for CH4, (CO and CO2 ?)
top related