Coupled WRF/Unified Noah LSM

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0.1 Z0HB [m] 0.1 Z0HG [m] 0.1 Num_Roof_Layers [-] 4 Num_Wall_Layers [-] 4 Num_Road_Layers [-] 4 DDZR(1) [cm] 5. DDZR(2) [cm] 5. DDZR(3) [cm] 5. DDZR(4) [cm] 5. DDZB(1) [cm] 5. DDZB(2) [cm] 5. DDZB(3) [cm] 5. DDZB(4) [cm] 5. DDZG(1) [cm] 5. DDZG(2) [cm] 25. DDZG(3) [cm] 50. DDZG(4) [cm] 75. Lower Boundary Condition for Roof Layer Temp [1: Zero-Flux, 2: T = Constant] 1 Lower Boundary Condition for Wall Layer Temp [1: Zero-Flux, 2: T = Constant] 1 Lower Boundary Condition for Road Layer Temp [1: Zero-Flux, 2: T = Constant] 1 TRLEND [K] 300.15 TBLEND [K] 300.15 TGLEND [K] 300.15 Ch of Wall and Road [1: M-O Similarity Theory, 2: Empirical Form (recommend)] 2 Surface and Layer Temperatures [1: 4-layer model, 2: Force-Restore method] 1 ahoption [0: no ah, 1: add ah to FLXTH] 1 AH Diurnal profile (tloc from 1~12 and 13~24) : 0.16 0.13 0.08 0.07 0.08 0.26 0.67 0.99 0.89 0.79 0.74 0.73 0.75 0.76 0.82 0.90 1.00 0.95 0.68 0.61 0.53 0.35 0.21 0.18 10
5 Implementation of UCM in <strong>WRF</strong> 5.1 General information about the Urban-Canopy model (UCM) Flowchart of Urban model: subroutine urban (1) Get atmospheric variables of the <strong>WRF</strong> and state variables of the urban canopy model wind speed, air temperature, humidity, downward short wave radiation, downward long wave radiation, air density, cosine of solar zenith angle, solar declination, height of the first atmospheric level, roof surface temperature, wall surface temperature, road surface temperature, roof layer temperature, wall layer temperature, road layer temperature, Monin-Obkhov stability length above roof, wall, and road. (2) Get urban parameters (3) Convert unit (4) Calculate wind profile within the urban canopy layer (5) Calculate net short wave radiation on the roof, wall, and road (6) Calculate Monnin-Obkhov stability length above the roof by the Newton-Rapson method: Solving non-liner equation. First guess is the same as the stability length at the previous step. (7) Calculate CH, CD and moisture availability of the roof (8) Calculate Rn, H, lE, and G from the roof surface (9) Calculate roof surface temperature (10) Iteration of (7) and (8) by the Newton-Rapson method: Solving non-liner equation (11) New roof surface temperature (12) New Rn, H, lE, and G using new roof surface temperature (13) New roof layer temperature using new roof surface temperature: Solving 4-layers heat equation model (14) Calculate CH of the wall and road by the Jurges formula and moisture availability (15) Calculate Rn, H, lE, and G from the wall and road surfaces (16) Calculate wall and road surface temperature (17) Iteration of (15) and (16) by the Newton-Rapson method: Solving non-linear simultaneous two equations (18) New wall and road surface temperatures (19) New Rn, H, lE, and G using new wall and road surface temperature (20) New wall and road layer temperatures using new wall and road surface temperatures: Solving 4-layers heat equation model (21) Calculate Monnin-Obkhov stability length above the urban canopy by the Newton- Rapson method: Solving non-liner equation. First guess is the same as the stability length at the previous step. (22) Calculate CH, CD of the urban canopy (23) Calculate Rn, H, lE, and G from the urban canopy (24) Calculate new canopy air temperature and humidity using heat fluxes from canopy, wall, and road 11
Page 1 and 2: Coupled WRF/Unified Noah/Urban-Cano
Page 3 and 4: FIG. 2. Radiation of the single-lay
Page 5 and 6: The procedure to download the data
Page 7 and 8: 4.2 Table 1: Primary and Secondary
Page 9: Secondary UCM Variables Symbol Name
Page 13 and 14: 5.2 WRF physics calling order 5.2.1
Page 15 and 16: & ,sh_urb2d,lh_urb2d,g_urb2d,rn_urb
Page 17 and 18: phys: module_ra_gfdleta.F SUBROUTIN
Page 19 and 20: dyn_em: start_em.F CALL phy_init (a
Page 21 and 22: state real OMG_URB2D ij misc 1 - r

Coupled WRF/Unified Noah LSM

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