BVW Model Update History

Version 1998.3: Updated 21 Oct. 1998:

• Added period as sea state input.
• Improved stability of algorithm for non-zero relative wind angles.

Version 1998.4: Updated 22 Oct. 1998:

• fixed bug in wet bulb derived specific humidity.

Version 1998.5: Updated 2 Nov. 1998:

• Logic in sea state portion of roughness length tightened to better work with non-zero relative wind angles.
• Wind and waves moving perpendicular the specified wave direction (parallel to the crests) are assumed to be in local equilibrium.
• Height correction for wind speed accurately considers two surface dimensions.

Version 1999.0: Updated 18 Jan. 1999:

• Global variables removed and passed to routines as needed. Calling the three main subroutines (ht_adj, pmix, and find_q) is transpatent to these changes.
• Conditions of non-local equilibrium allowed with seastate parameter (ss_prm) equal to 0. For this input option only, previous versions reset the input sea state value to the equilibrium value (1.0).

Version 1999.0a: Updated 25 Aug. 1999:

• Minor change to subroutine f_bstar. Change in output is negligible.

Version 1999.0b: Updated 30 Nov. 1999:

• Slight change in subroutine names (pmix -> pmix_; ht_adj -> ht_adj_; find_q -> find_q_). These changes allow calls from FORTRAN routines on non-SGI machines. Examples of these calls are now provided (ftest2_bvw99.f and ftest2_ht_adj99.f).

Version 1999.1: Updated 27 March 2000:

• Correction to calculation of Obukhov scale length in routine 'solve'. Results in improved sensible and latent heat fluxes for substantially non-neutral conditions.