[7] | 1 | !********************************************************************** |
---|
| 2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
---|
| 3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
---|
| 4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
---|
| 5 | ! * |
---|
| 6 | ! This file is part of FLEXPART. * |
---|
| 7 | ! * |
---|
| 8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
---|
| 9 | ! it under the terms of the GNU General Public License as published by* |
---|
| 10 | ! the Free Software Foundation, either version 3 of the License, or * |
---|
| 11 | ! (at your option) any later version. * |
---|
| 12 | ! * |
---|
| 13 | ! FLEXPART is distributed in the hope that it will be useful, * |
---|
| 14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
---|
| 15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
---|
| 16 | ! GNU General Public License for more details. * |
---|
| 17 | ! * |
---|
| 18 | ! You should have received a copy of the GNU General Public License * |
---|
| 19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
---|
| 20 | !********************************************************************** |
---|
| 21 | |
---|
| 22 | function raerod (l,ust,z0) |
---|
| 23 | |
---|
| 24 | !***************************************************************************** |
---|
| 25 | ! * |
---|
| 26 | ! Calculation of the aerodynamical resistance ra from ground up to href * |
---|
| 27 | ! * |
---|
| 28 | ! AUTHOR: Matthias Langer, modified by Andreas Stohl (6 August 1993) * |
---|
| 29 | ! * |
---|
| 30 | ! Literature: * |
---|
| 31 | ! [1] Hicks/Baldocchi/Meyers/Hosker/Matt (1987), A Preliminary * |
---|
| 32 | ! Multiple Resistance Routine for Deriving Dry Deposition * |
---|
| 33 | ! Velocities from Measured Quantities. * |
---|
| 34 | ! Water, Air and Soil Pollution 36 (1987), pp.311-330. * |
---|
| 35 | ! [2] Scire/Yamartino/Carmichael/Chang (1989), * |
---|
| 36 | ! CALGRID: A Mesoscale Photochemical Grid Model. * |
---|
| 37 | ! Vol II: User's Guide. (Report No.A049-1, June, 1989) * |
---|
| 38 | ! * |
---|
| 39 | ! Variable list: * |
---|
| 40 | ! L = Monin-Obukhov-length [m] * |
---|
| 41 | ! ust = friction velocity [m/sec] * |
---|
| 42 | ! z0 = surface roughness length [m] * |
---|
| 43 | ! href = reference height [m], for which deposition velocity is * |
---|
| 44 | ! calculated * |
---|
| 45 | ! * |
---|
| 46 | ! Constants: * |
---|
| 47 | ! karman = von Karman-constant (~0.4) * |
---|
| 48 | ! ramin = minimum resistence of ra (1 s/m) * |
---|
| 49 | ! * |
---|
| 50 | ! Subprograms and functions: * |
---|
| 51 | ! function psih (z/L) * |
---|
| 52 | ! * |
---|
| 53 | !***************************************************************************** |
---|
| 54 | |
---|
| 55 | use par_mod |
---|
| 56 | |
---|
| 57 | implicit none |
---|
| 58 | |
---|
| 59 | real :: l,psih,raerod,ust,z0 |
---|
| 60 | |
---|
| 61 | raerod=(alog(href/z0)-psih(href,l)+psih(z0,l))/(karman*ust) |
---|
| 62 | |
---|
| 63 | end function raerod |
---|