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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) 14 th WRF Users’ Workshop, 26 June 2013. Domain and Setup.

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slide1

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)

14th WRF Users’ Workshop, 26 June 2013

domain and setup
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
lsm setup
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)
slide4

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

analysis regions
Analysis Regions
  • Based on NCDC Regional Climate Zones
  • Observations: METAR/SYNOP stations, NCDC daily gridded precip
depth to water table mmf input
Depth to Water Table – MMF input

Looks similar to terrain

Focus of this presentation are locations with shallow water table

regional groundwater recharge 2010
Regional Groundwater Recharge: 2010

Noah

Noah-MP R3

Noah-MP R5

regional groundwater recharge 20101
Regional Groundwater Recharge: 2010

Noah

Noah-MP R3

Noah-MP R5

regional groundwater recharge 2002
Regional Groundwater Recharge: 2002

Noah

Noah-MP R3

Noah-MP R5

regional deep soil moisture 2010
Regional Deep Soil Moisture: 2010

Noah

Noah-MP R3

Noah-MP R5

regional deep soil moisture 2002
Regional Deep Soil Moisture: 2002

Noah

Noah-MP R3

Noah-MP R5

regional root soil moisture 2010
Regional Root Soil Moisture: 2010

Noah

Noah-MP R3

Noah-MP R5

regional root soil moisture 2002
Regional Root Soil Moisture: 2002

Noah

Noah-MP R3

Noah-MP R5

regional latent heat flux 2010
Regional Latent Heat Flux: 2010

Noah

Noah-MP R3

Noah-MP R5

regional latent heat flux 20101
Regional Latent Heat Flux: 2010

Noah

Noah-MP R3

Noah-MP R5

regional latent heat flux 2002
Regional Latent Heat Flux: 2002

Increase LH especially in JJA

Noah

Noah-MP R3

Noah-MP R5

regional latent heat flux 20021
Regional Latent Heat Flux: 2002

Noah

Noah-MP R3

Noah-MP R5

regional precipitation 2010
Regional Precipitation: 2010

Hurricane Alex

Black: NCDC climatology Thick Black: NCDC observations

Noah

Noah-MP R3

Noah-MP R5

regional precipitation 20101
Regional Precipitation: 2010

Hurricane Alex

Black: NCDC climatology Thick Black: NCDC observations

Noah

Noah-MP R3

Noah-MP R5

regional precipitation 2002
Regional Precipitation: 2002

Black: NCDC climatology Thick Black: NCDC observations

Noah

Noah-MP R3

Noah-MP R5

regional precipitation 20021
Regional Precipitation: 2002

Black: NCDC climatology Thick Black: NCDC observations

Noah

Noah-MP R3

Noah-MP R5

summary
Summary
  • Tested a new groundwater option to Noah-MP that accounts for aquifer interaction
  • 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
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