Slide 1

The University of Arizonas Contribution to RASMMichael A. Brunkeand Xubin Zeng

Vegetation dataset generation2VEGETATION DYNAMICSGIMMS 16 km NDVI for 1982-2008

Maximum GVC based on Zeng et al. (2000):

Varies from year to year.De-greening of Taimyr Peninsula.

2

Vegetation dataset generation3VEGETATION DYNAMICS

MODIS 1 km NDVI for 2002-present (Patrick Broxton)3

Vegetation dataset generation4VEGETATION DYNAMICSLAI also provided by the MODIS team.

Can see progression of LAI from tropics poleward as leaves bud out in spring and back towards tropics with senescence in fall.

(Thanks to PatrickBroxton)4

Implementation of CN(DV) into VIC5VEGETATION DYNAMICSUAUWImplement VIC4.1.2.d into RASM.Implement CN into offline VIC4.1.2.d.1

Implementation of CN(DV) into VIC6VEGETATION DYNAMICSVICCNSurface metSoil moisture/temp.LAICanopy geometryRoot distribution

Implementation of CN(DV) into VIC7VEGETATION DYNAMICSUAUWImplement VIC4.1.2.d into RASM.Implement CN into offline VIC4.1.2.d.Implement VIC-CN into RASM.Test offline VIC-CN/comparison to flux tower data.123Test RASM simulation with VIC-CN.4VIC-CNDV development

Bias in r32RB1a8TEMPERATURE BIAS

MERRAr32RB1ar30RB1gWarm biases replaced by cool biases in eastern Canada and northern Eurasia.8

Bias in r32RB1a9TEMPERATURE BIASMERRAr32RB1ar30RB1g

0Z3Z6Z9Z12Z15Z18Z21ZWarm biases replaced by cool biases in eastern Canada and northern Eurasia.

Cool bias worse during the daytime.9

Bias in r32RB1a10TEMPERATURE BIAS

ONKZ

January10

How does albedo affect r33?11TEMPERATURE BIAS

January

KZON11

How does albedo affect r33?12TEMPERATURE BIASSeptember

KZON12

Using RASM13HUMIDITY INVERSIONS

Ready to use RASM to analyze specific humidity inversion climatology in the Arctic.

Finer detail of humidity inversions in RASM.13

Using RASM14HUMIDITY INVERSIONS

Ready to use RASM to analyze specific humidity inversion climatology in the Arctic.

Finer detail of humidity inversions in RASM.

Can compare with IPCC models.14