/[MITgcm]/manual/s_ecco/exf.tex
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1 \section{The external forcing package \texttt{exf}
2 \label{sectionexf}}
3 \begin{rawhtml}
4 <!-- CMIREDIR:sectionexf: -->
5 \end{rawhtml}
6
7 \subsection{Summary}
8
9 {\footnotesize
10 \begin{verbatim}
11 c Field definitions, units, and sign conventions:
12 c ===============================================
13 c
14 c ustress :: Zonal surface wind stress in N/m^2
15 c > 0 for increase in uVel, which is west to
16 c east for cartesian and spherical polar grids
17 c Typical range: -0.5 < ustress < 0.5
18 c Southwest C-grid U point
19 c Input field
20 c
21 c vstress :: Meridional surface wind stress in N/m^2
22 c > 0 for increase in vVel, which is south to
23 c north for cartesian and spherical polar grids
24 c Typical range: -0.5 < vstress < 0.5
25 c Southwest C-grid V point
26 c Input field
27 c
28 c hflux :: Net upward surface heat flux excluding shortwave in W/m^2
29 c hflux = latent + sensible + lwflux
30 c > 0 for decrease in theta (ocean cooling)
31 c Typical range: -250 < hflux < 600
32 c Southwest C-grid tracer point
33 c Input field
34 c
35 c sflux :: Net upward freshwater flux in m/s
36 c sflux = evap - precip - runoff
37 c > 0 for increase in salt (ocean salinity)
38 c Typical range: -1e-7 < sflux < 1e-7
39 c Southwest C-grid tracer point
40 c Input field
41 c
42 c swflux :: Net upward shortwave radiation in W/m^2
43 c swflux = - ( swdown - ice and snow absorption - reflected )
44 c > 0 for decrease in theta (ocean cooling)
45 c Typical range: -350 < swflux < 0
46 c Southwest C-grid tracer point
47 c Input field
48 c
49 c uwind :: Surface (10-m) zonal wind velocity in m/s
50 c > 0 for increase in uVel, which is west to
51 c east for cartesian and spherical polar grids
52 c Typical range: -10 < uwind < 10
53 c Southwest C-grid U point
54 c Input or input/output field
55 c
56 c vwind :: Surface (10-m) meridional wind velocity in m/s
57 c > 0 for increase in vVel, which is south to
58 c north for cartesian and spherical polar grids
59 c Typical range: -10 < vwind < 10
60 c Southwest C-grid V point
61 c Input or input/output field
62 c
63 c atemp :: Surface (2-m) air temperature in deg K
64 c Typical range: 200 < atemp < 300
65 c Southwest C-grid tracer point
66 c Input or input/output field
67 c
68 c aqh :: Surface (2m) specific humidity in kg/kg
69 c Typical range: 0 < aqh < 0.02
70 c Southwest C-grid tracer point
71 c Input or input/output field
72 c
73 c lwflux :: Net upward longwave radiation in W/m^2
74 c lwflux = - ( lwdown - ice and snow absorption - emitted )
75 c > 0 for decrease in theta (ocean cooling)
76 c Typical range: -20 < lwflux < 170
77 c Southwest C-grid tracer point
78 c Input field
79 c
80 c evap :: Evaporation in m/s
81 c > 0 for increase in salt (ocean salinity)
82 c Typical range: 0 < evap < 2.5e-7
83 c Southwest C-grid tracer point
84 c Input, input/output, or output field
85 c
86 c precip :: Precipitation in m/s
87 c > 0 for decrease in salt (ocean salinity)
88 c Typical range: 0 < precip < 5e-7
89 c Southwest C-grid tracer point
90 c Input or input/output field
91 c
92 c runoff :: River and glacier runoff in m/s
93 c > 0 for decrease in salt (ocean salinity)
94 c Typical range: 0 < runoff < ????
95 c Southwest C-grid tracer point
96 c Input or input/output field
97 c !!! WATCH OUT: Default exf_inscal_runoff !!!
98 c !!! in exf_readparms.F is not 1.0 !!!
99 c
100 c swdown :: Downward shortwave radiation in W/m^2
101 c > 0 for increase in theta (ocean warming)
102 c Typical range: 0 < swdown < 450
103 c Southwest C-grid tracer point
104 c Input/output field
105 c
106 c lwdown :: Downward longwave radiation in W/m^2
107 c > 0 for increase in theta (ocean warming)
108 c Typical range: 50 < lwdown < 450
109 c Southwest C-grid tracer point
110 c Input/output field
111 c
112 c apressure :: Atmospheric pressure field in N/m^2
113 c > 0 for ????
114 c Typical range: ???? < apressure < ????
115 c Southwest C-grid tracer point
116 c Input field
117 C
118 C
119 c NOTES:
120 c ======
121 c
122 c Input and output units and sign conventions can be customized
123 c using variables exf_inscal_* and exf_outscal_*, which are set
124 c by exf_readparms.F
125 c
126 c Output fields fu, fv, Qnet, Qsw, and EmPmR are
127 c defined in FFIELDS.h
128 c
129 c #ifndef SHORTWAVE_HEATING, hflux includes shortwave,
130 c that is, hflux = latent + sensible + lwflux +swflux
131 c
132 c If (EXFwindOnBgrid .EQ. .TRUE.), uwind and vwind are
133 c defined on northeast B-grid U and V points, respectively.
134 c
135 c Arrays *0 and *1 below are used for temporal interpolation.
136 \end{verbatim}
137 }
138

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