Land surface model: VIC

UW: Bart Nijssen, Amanda Tan, Dennis P. Lettenmaier

DRC: Jose Renteria, Kevin Lindt

NPS: Andrew Roberts

Consultant: Tony Craig

RASM Project Meeting: May 15-17, 2012, Monterey, CA

Personnel changes

• Left: – Chunmei Zhu (postdoc)

• New: – Bart Nijssen (research scientist)

• Unchanged:– Amanda Tan (graduate student)– Dennis Lettenmaier (PI)

VIC infrastructure developments

• Parallelization:– Allows VIC to run on multiple processors– Allows VIC to run alongside the ocean model– Significantly reduces model runtime

• Standardized output and state files (NetCDF)• In-progress: multiple output streams

Model simulations• Offline simulations

– Long-term simulations (from 1948-)– Interpolated to RASM grid– Based on Sheffield et al. 2006

Sheffield, J., G. Goteti, and E. F. Wood (2006), Development of a 50-year high-resolution global dataset of meteorological forcings for land surface modeling, J Climate, 19(13), 3088-3111, doi:10.1175/jcli3790.1.

• Coupled simulations– r28RB1g– r30RB1g

• Analysis period: 1990-1999

Air temperature: Annual 1990-1999

Sheffield (2006) r28RB1g

Air temperature: 1990-1999

Sheffield (2006)

r28RB1g

January April July October

Air temperature: 1990-1999r28RB1g - Sheffield (2006)

Annual January

Air temperature: 1990-1999r28RB1g - Sheffield (2006)

Annual

January

Precipitation: Annual 1990-1999

Sheffield (2006) r28RB1g

Precipitation: Annual 1990-1999Sheffield (2006)

r28RB1g

r28RB1g - Sheffield (2006)

Precipitation: monthly 1990-1999

Sheffield (2006) r28RB1g

Basins

Water balance

P = E + R + ΔSr28RB1g: 1990-1999

Evaporation and runoff: 1990-1999 r28RB1g

evaporation runoff

North AmericaYukonMacKenzie

Eurasia

Ob Yenisei Lena

Streamflow - Lenar30RB1gr28RB1g

Net radiation: 1990-1999

VIC offline r28RB1g

Latent heat: 1990-1999

VIC offline r28RB1g

Sensible heat: 1990-1999

VIC offline r28RB1g

Sensible heat: 1990-1999

r28RB1g

VIC 4.0.4

January April July October

January 1990-1999: Skin and air temperatures

Air temperature Skin temperature

Skin – air temperature r28RB1gAir temperature Skin temperature

Skin – air temperature

VIC 4.0.4

Snow extent

r28RB1g

End of April, 1995

What next?

• Final fixes to current version of VIC in RASM• Upgrade to VIC 4.1.2• Routing model• Link with dynamic vegetation• Link with land ice model