African Domain

Includes: NE Africa

W Africa

S Africa

Motivation/Mid-term Goals• Land use change/sensitivity/agriculture:

– Regional attribution• What’s expected in individual regions?• Forcings?• Land use impacts as part of climate change

– Africanized model (includes baseline sim.)– Foci on precip, H2O cycle, surface energy

balance, temp, crop model (Bill and Lisa for connections)

– Engage with external forces/professionals

• Engage aerosol studies.• Contribute to IPCC 4th Assessment Report.

African Networking• Domain sizes:

– NE Africa (lat 40N 10S; lon 18E 60E; 100x88)– W Africa (lat 40N 5S; lon 25W 22E; 90x94)– S Africa (lat 5N 40S; lon 0E/W 57E; 90x114)

• Team leaders:– NE: Hasanean M.– W: Ernest A.– S: Anne B.

• Project ideas:– Mosaic of land use– Aerosols and convection (ICTP collaboration)

↑ Lat 40N 10S; Long 18E 60E

← Lat 5N 40S; Long 0E/W 57E

← Lat 40N 5S; Long 25W 22E

African Domains

To do:• Center lines for domains.• Projection• Short runs to test/compare over domain,

~1997-2001 for:• NE: NDJFM• W: JJAS• S: DJF & JJA

• Baseline simulation.• Literature review on land use, etc… in

individual domains.• Land use variables: ppt, temp, runoff, clouds

(1984-1989), convection, ITCZ.

Model parameters• Grell and Betts-Miller convection schemes

• Use default baseline

• .gif images to compare with similar intervals (posted on web)

• Idea for live-access server betw groups (long-term)

Land use in NE Africa

• Aerosols: linked to dust emissions; examine incoming tracers, using offline computations?

• Reforestation experiments in Egypt; deforestation in Ethiopia – ppt, runoff, Nile river flow or not.

Land Use for W Africa• Lake Chad.

• Nigeria: deforestation 2.8%/a; savanna movement; Sahel movement.

• Investigate driving forces of above in W Africa: change forests to cropland to examine deforestation effects.

• Aerosols: linked to fire/gas/dust emissions; examine incoming tracers, using offline computations?

Land Use for S Africa• Aerosols: linked to fire emissions; examine

incoming tracers, using offline computations?

• Literature review for further case studies.

Milestones• W Africa associates with ICTP and Jeremy• NE Africa assoc. Greg and Nellie• S Africa based in CT/Pta, SA• Due date for:

– Short runs: Aug. 2003– Long runs: mid 2004– Perturbation runs: mid 2004-early 2005

• Need planning workshop (Egypt?) for:– Long runs– Logistics– Target date for workshop: early Nov 2003 in Egypt !

• Writing workshop 2005

Other Issues

• Computing resources.

• Visiting other institutions:– Computing– Writing (thinking time)

• Data storage.

• Etc…

Additional issues/needs

• Resolution (high res. exp.) with Jeremy.

• Emissions data (Fabien)

• Add betts-miller scheme (Bi)

• Computing needs (need computers for west africa runs)

• Late 2003 meeting

• Subgrid parameterization