1 / 8

Extending the GEOS-CHEM to the Stratosphere —Some Issues

Extending the GEOS-CHEM to the Stratosphere —Some Issues. Tom Zhao and Mian Chin (June 2-3, 2003). OUTLINE. 1. More Species and Stiffness 2. Widened Photolysis Spectral 3. Increased Computational Load 4. Restart File 5. Comments. GEOS-CHEM V. 4.5. GEOS-CHEM V. 4.5 + Stratosphere Chem.

ozzy
Download Presentation

Extending the GEOS-CHEM to the Stratosphere —Some Issues

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Extending the GEOS-CHEM to the Stratosphere—Some Issues Tom Zhao and Mian Chin (June 2-3, 2003) OUTLINE 1. More Species and Stiffness 2. Widened Photolysis Spectral 3. Increased Computational Load 4. Restart File 5. Comments

  2. GEOS-CHEM V. 4.5 GEOS-CHEM V. 4.5 + Stratosphere Chem. • 32 Families • NOx, HOx, CLx, BRx, Ox, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, MP, HCL, CH4, CH3CL, CCL4, CFCL3, CF2CL2, CH3BR, N2O • Photolysis • Fast-J2 (Bian et al.) • l1=177-291nm; l2=291-850nm • Computational Load • SGI 2000/16CPU/18 hrs walltime • 6 GB MEM • 140 CPU hours/day • Restart Frequency • 1 Day • 24 Families • NOx, Ox, PAN, CO, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP • Photolysis • Fast -J (Wild et al.) • l=291-850nm • Computational Load • SGI 2000/16CPU/18 hrs walltime • 2 GB MEM • 8 CPU hrs/day • Restart Frequency • 15 Days

  3. Monthly Mean O3 OH March 1994 March 1994 Results are not good. Why?

  4. Daily Mean OH (January 1, 1994) Continuous Run Restart Run

  5. Daily Mean OH (January 2, 1994) Continuous Run Restart Run Restart Make Difference. Why? Restart Family not Species!

  6. Daily Mean O3 (January 1, 1994) Continuous Run Restart Run

  7. Daily Mean O3 (January 2, 1994) Continuous Run Restart Run

  8. Comments • It would be more reasonable to restart for species rather than for families. Hope GAMAP can be modified accordingly. • Make continuous run of the model if sufficient computational resource is available.

More Related