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Michael Barlage Mukul Tewari , Fei Chen, Kevin Manning (NCAR)

North American Regional Climate Simulations with WRF/Noah-MP: Validation and the effect of groundwater interaction. Michael Barlage Mukul Tewari , Fei Chen, Kevin Manning (NCAR) Gonzalo Miguez -Macho (U. Santiago) Noah Telecon , 18 July 2013. Domain and Setup.

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Michael Barlage Mukul Tewari , Fei Chen, Kevin Manning (NCAR)

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  1. North American Regional Climate Simulations with WRF/Noah-MP: Validation and the effect of groundwater interaction Michael Barlage MukulTewari, Fei Chen, Kevin Manning (NCAR) Gonzalo Miguez-Macho (U. Santiago) Noah Telecon, 18 July 2013

  2. Domain and Setup • Two six-month 30km simulations starting Feb 25 • 2002 and 2010 • Spin-up soil for one year using offline HRLDAS • IC/BC from NARR • CAM radiation; YSU; Thompson

  3. LSM Setup • Default Noah LSM • Noah-MP with OPT_RUN=3: free drainage comparable to Noah runoff scheme • Noah-MP with OPT_RUN=5: Miguez-Macho & Fan groundwater with equilibrium water table • Noah-MP with OPT_BTR=1(Noah) and 2 (CLM)

  4. conductivity Transmisivity width of flow cross section Head difference divided by distance (water table slope) i,j Cell ij Qr R Q2 Q1 Q3 Plan view Cross section view Sg w i, j Q8 Q8 h i,j Q4 Q4 Q5 Q7 Q6 Mean sea level Miguez-Macho & Fan water table dynamics in NOAH-MP Equations: Mass balance in groundwater storage: Darcy’s Law for groundwater – river exchange: Darcy’s Law for lateral groundwater flow: Water table depth (wtd) Fan et al, JGR 2007 Miguez-Macho et al., JGR 2007

  5. Climate: 2002 and 2010 MAM

  6. Climate: 2002 and 2010 JJA

  7. Analysis Regions • Based on NCDC Regional Climate Zones • Observations: METAR/SYNOP stations, NCDC daily gridded precip

  8. Depth to Water Table – MMF input Looks similar to terrain Focus of this presentation are locations with shallow water table

  9. Regional Groundwater Recharge: 2010 Noah Noah-MP R3 Noah-MP R5

  10. Regional Groundwater Recharge: 2002 Noah Noah-MP R3 Noah-MP R5

  11. Temperature – 2 meter: MAM 2010 day

  12. Temperature – 2 meter: MAM 2010 night

  13. Temperature – 2 meter: JJA 2010 day

  14. Temperature – 2 meter: JJA 2010 night

  15. Temperature – 2 meter: MAM 2002 day

  16. Temperature – 2 meter: MAM 2002 night

  17. Temperature – 2 meter: JJA 2002 day

  18. Temperature – 2 meter: JJA 2002 night

  19. Dewpoint – 2 meter: MAM 2002 day

  20. Dewpoint – 2 meter: MAM 2002 night

  21. Temperature – 2 meter: August 2010Offline simulation driven with NARR

  22. Temperature – 2 meter: August 2010Offline simulation driven with NARR

  23. Temperature – 2 meter: August 2010Offline simulation driven with NARR

  24. Summary • Tested a new groundwater option to Noah-MP that accounts for aquifer interaction with lateral flow • Noah-MP performs better than Noah for near surface temperature (with exceptions), though more optimization is likely required • Noah-MP performs the same (2002) or regionally worse (2010) for precipitation • In regions with low water table depth, upward transport of water: • Increases late summer latent heat flux • Has little effect on precipitation • Improves surface temperature simulation

  25. Regional Deep Soil Moisture: 2002 Noah Noah-MP R3 Noah-MP R5

  26. Regional Deep Soil Moisture: 2010 Noah Noah-MP R3 Noah-MP R5

  27. Regional Root Soil Moisture: 2002 Noah Noah-MP R3 Noah-MP R5

  28. Regional Root Soil Moisture: 2010 Noah Noah-MP R3 Noah-MP R5

  29. Regional Latent Heat Flux: 2002 Increase LH especially in JJA Noah Noah-MP R3 Noah-MP R5

  30. Regional Latent Heat Flux: 2002 Difference from Noah Noah Noah-MP R3 Noah-MP R5

  31. Regional Latent Heat Flux: 2010 Noah Noah-MP R3 Noah-MP R5

  32. Regional Latent Heat Flux: 2010 Difference from Noah Noah Noah-MP R3 Noah-MP R5

  33. Regional Precipitation: 2002 Black: NCDC climatology Thick Black: NCDC observations Noah Noah-MP R3 Noah-MP R5

  34. Regional Precipitation: 2002 Difference from Obs Black: NCDC climatology Thick Black: NCDC observations Noah Noah-MP R3 Noah-MP R5

  35. Regional Precipitation: 2010 Hurricane Alex Black: NCDC climatology Thick Black: NCDC observations Noah Noah-MP R3 Noah-MP R5

  36. Regional Precipitation: 2010 Difference from Obs Hurricane Alex Black: NCDC climatology Thick Black: NCDC observations Noah Noah-MP R3 Noah-MP R5

  37. Dewpoint – 2 meter: JJA 2002 day

  38. Dewpoint – 2 meter: JJA 2002 night

  39. Dewpoint – 2 meter: MAM 2010 day

  40. Dewpoint – 2 meter: MAM 2010 night

  41. Dewpoint – 2 meter: JJA 2010 day

  42. Dewpoint – 2 meter: JJA 2010 night

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