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The University of Arizona’s Contribution to RASM

The University of Arizona’s Contribution to RASM. Michael A. Brunke a nd Xubin Zeng. VEGETATION DYNAMICS. 2. Vegetation dataset generation. GIMMS 16 km NDVI for 1982-2008 Maximum G VC based on Zeng et al. (2000): Varies from year to year. De-greening of Taimyr Peninsula.

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The University of Arizona’s Contribution to RASM

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  1. The University of Arizona’s Contribution to RASM Michael A. Brunke and XubinZeng

  2. VEGETATION DYNAMICS 2 Vegetation dataset generation • GIMMS 16 km NDVI for 1982-2008 • Maximum GVC based on Zeng et al. (2000): • Varies from year to year. • De-greening of Taimyr Peninsula.

  3. VEGETATION DYNAMICS 3 Vegetation dataset generation • MODIS 1 km NDVI for 2002-present (Patrick Broxton)

  4. VEGETATION DYNAMICS 4 Vegetation dataset generation • LAI 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 Patrick Broxton)

  5. VEGETATION DYNAMICS 5 Implementation of CN(DV) into VIC UA UW 1 Implement CN into offline VIC4.1.2.d. Implement VIC4.1.2.d into RASM.

  6. VEGETATION DYNAMICS 6 Implementation of CN(DV) into VIC VIC CN LAI Canopy geometry Root distribution Surface met Soil moisture/temp.

  7. VEGETATION DYNAMICS 7 Implementation of CN(DV) into VIC UA UW 1 Implement CN into offline VIC4.1.2.d. Implement VIC4.1.2.d into RASM. 2 Test offline VIC-CN/comparison to flux tower data. 3 Implement VIC-CN into RASM. 4 Test RASM simulation with VIC-CN. VIC-CNDV development

  8. TEMPERATURE BIAS 8 Bias in r32RB1a • Warm biases replaced by cool biases in eastern Canada and northern Eurasia. MERRA r32RB1a r30RB1g

  9. TEMPERATURE BIAS 9 Bias in r32RB1a MERRA r32RB1a r30RB1g • Warm biases replaced by cool biases in eastern Canada and northern Eurasia. • Cool bias worse during the daytime. 0Z 3Z 6Z 9Z 12Z 15Z 18Z 21Z

  10. TEMPERATURE BIAS 10 Bias in r32RB1a January ON KZ

  11. TEMPERATURE BIAS 11 How does albedo affect r33? January ON KZ

  12. TEMPERATURE BIAS 12 How does albedo affect r33? September ON KZ

  13. HUMIDITY INVERSIONS 13 Using RASM • Ready to use RASM to analyze specific humidity inversion climatology in the Arctic. • Finer detail of humidity inversions in RASM.

  14. HUMIDITY INVERSIONS 14 Using RASM • 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.

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