Presentation is loading. Please wait.

Presentation is loading. Please wait.

Constituent Assimilation in GMAO Ivanka Štajner Hiroo Hayashi Kris Wargan Steven Pawson.

Similar presentations


Presentation on theme: "Constituent Assimilation in GMAO Ivanka Štajner Hiroo Hayashi Kris Wargan Steven Pawson."— Presentation transcript:

1 Constituent Assimilation in GMAO Ivanka Štajner Hiroo Hayashi Kris Wargan Steven Pawson

2 Ozone Assimilation Established off-line system, using CTM with parameterized P & L in stratosphere TOMS and/or SBUV total columns, along with SBUV partial columns and/or MLS data Implementation on-line in GCM (transport, feedback to meteorology) New data types: MIPAS, occultation sensors EOS-Aura package Tropospheric ozone with Harvard P & L

3 Ozone: MIPAS O-F statistics  O-F RMS values for MIPAS & SBUV both improve (decrease) when MIPAS data are assimilated  Chi^2 statistics indicate that the reported MIPAS standard deviations may be too small K. Wargan, I Stajner: preliminary

4 Ozone: GEOS-2 vs GEOS-4 winds Assimilation with GEOS-4 winds (red) agrees with sondes (black) better than that with GEOS-2 winds (blue) Tahiti 18S, 211E Reunion 21S, 56E Ozone mixing ratio (ppbv)

5 Plans for Other Constituents Aerosol: assimilation development (da Silva) CO: using Harvard OH parameterization, in GCM - MOPPIT, TES, AIRS CO 2 : comprehensive land-atmosphere-ocean modeling and assimilation system is planned Preliminary AIRS CO and CO 2 data from Chris Barnet

6 Constituent Modeling Full chemistry in GCM: –Stratospheric ozone-climate (underway) –Tropospheric chemistry (in planning) – relationships between climate and (say) air quality, including aerosols Full chemistry will also allow multi-constituent assimilation in 3D framework –Have box-model capability (Lary) –Multi-dimensional, multi-constituent assimilation may be feasible in the 5-10-year timeframe

7 Summary GMAO welcomes collaboration: we offer expertise in assimilation and in global modeling GMAO will not attempt to reinvent wheels (especially square ones) Aim is to build a flexible infrastructure that can be used for useful science CDAWG? (Chemical Data Assimilation Working Group)


Download ppt "Constituent Assimilation in GMAO Ivanka Štajner Hiroo Hayashi Kris Wargan Steven Pawson."

Similar presentations


Ads by Google