Open joshi994 opened 2 months ago
The regression test results:
Test Type | Expected | Received | Failed
= = = = = = = = = = = = = = = = = = = = = = = = = = = =
Number of Tests : 23 24
Number of Builds : 60 57
Number of Simulations : 158 150 0
Number of Comparisons : 95 86 0
Failed Simulations are:
None
Which comparisons are not bit-for-bit:
None
I am also bringing @barlage here just in case he has any insights on this problem.
The first line should be a single-line "purpose" for this change
TYPE: Bug fix
KEYWORDS: Stability function, stability parameter, mos subroutine, Monin-Obukhov similarity theory, Urban canopy model, surface energy balance, Green roof temperature.
SOURCE: Parag Joshi (Brookhaven National Laboratory), Katia Lamer (Brookhaven National Laboratory)
DESCRIPTION OF CHANGES: Problem: The calculations for PSIM in the mos subroutine of module-sf_urban.F has been corrected. The earlier equations has a typo where X (= (1-16\zeta)^1/4) is mentioned instead of X0. In addition, following the formulation of surface energy balance of OSU1DPBL scheme by Ek and Mahrt 1991, it appears that when the following definition is used $\sigma * \theta_s^4 = \sigma T_0^4 (1 + 4((\theta_s - T_0)/T_0)))$ is used, the temperature in the calculations of net flux at the surface should use T_0 (temperature at first atmospheric level). However, in the module TGRP (temperature of the green roof surface at previous time step is used)is used instead of T_0 (please refer to the attached screenshots of the formulation).
Also I am not sure why the term (\theta_0 - T_0) is neglected in the definition of YY (Line/command 1145 WRFv-4.5.2) whereas the equation for the $\theta_s$ in attached screenshot shows the term. Due to insignficant impact?
Solution: Following the formulation, the temperature variable has been updated according. Moreover, the mos subroutine is also corrected by replacing X by X0 where X0 is =X*z0/(z+z0) (as per the WRF/phys/module_sf_urban.F).
ISSUE: For use when this PR closes an issue. Fixes #123
LIST OF MODIFIED FILES: module_sf_urban.F
TESTS CONDUCTED:
For more details, refer to the pages # 47-50 of the document link in the release note.
RELEASE NOTE: The surface energy balance for the green roof is modified following the OSU1DPBL scheme. The document can be located at:
[https://ftp.emc.ncep.noaa.gov/mmb/gcp/ldas/nceplsm/OSU1DPBL/OSU1DPBL-userguide.pdf]
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