TM meeting, KNMI, 12 November 2003 EVERGREEN WP 4200: model intercomparison on transport and chemistry Peter Bergamaschi (JRC IES) Jan Fokke Meirink (KNMI)

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Presentation 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 222 Rn SF 6 OH (full chemistry runs) calibration of OH fields single-tracer forwards runs for CH 4 (CO, and CO 2 ?)

TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – atmospheric transport / chemistry models NCEP

TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – 222Rn protocol constant surface emissions of 1 atom cm -2 s -1 between -60 o S and 60 o N constant surface emissions of 0.5 atom cm -2 s -1 between 60 o N and 70 o N (except Greenland) no temporal variation

TM meeting, KNMI, 12 November Rn surface June

TM meeting, KNMI, 12 November Rn 750hPa June

TM meeting, KNMI, 12 November Rn 500hPa June

TM meeting, KNMI, 12 November Rn 250hPa June

TM meeting, KNMI, 12 November Rn latitude vs. altitude June

TM meeting, KNMI, 12 November Rn latitude vs. altitude December

TM meeting, KNMI, 12 November Rn Freiburg

TM meeting, KNMI, 12 November Rn Schauinsland

TM meeting, KNMI, 12 November Rn Mauna Loa

TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – SF6 protocol simulation emissions EDGAR V3.2 SF 6 inventory for 1995 (atmospheric increase 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

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 222 Rn / SF 6 OH (full chemistry runs) calibration of OH fields single-tracer forwards runs for CH 4, (CO and CO 2 ?)