/[MITgcm]/manual/s_ecco/exf.tex
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1 heimbach 1.1 \section{The external forcing package
2     \label{sectionexf}}
3    
4     \subsection{Summary}
5    
6     {\footnotesize
7     \begin{verbatim}
8     c Field definitions, units, and sign conventions:
9     c ===============================================
10     c
11     c ustress :: Zonal surface wind stress in N/m^2
12     c > 0 for increase in uVel, which is west to
13     c east for cartesian and spherical polar grids
14     c Typical range: -0.5 < ustress < 0.5
15     c Southwest C-grid U point
16     c Input field
17     c
18     c vstress :: Meridional surface wind stress in N/m^2
19     c > 0 for increase in vVel, which is south to
20     c north for cartesian and spherical polar grids
21     c Typical range: -0.5 < vstress < 0.5
22     c Southwest C-grid V point
23     c Input field
24     c
25     c hflux :: Net upward surface heat flux excluding shortwave in W/m^2
26     c hflux = latent + sensible + lwflux
27     c > 0 for decrease in theta (ocean cooling)
28     c Typical range: -250 < hflux < 600
29     c Southwest C-grid tracer point
30     c Input field
31     c
32     c sflux :: Net upward freshwater flux in m/s
33     c sflux = evap - precip - runoff
34     c > 0 for increase in salt (ocean salinity)
35     c Typical range: -1e-7 < sflux < 1e-7
36     c Southwest C-grid tracer point
37     c Input field
38     c
39     c swflux :: Net upward shortwave radiation in W/m^2
40     c swflux = - ( swdown - ice and snow absorption - reflected )
41     c > 0 for decrease in theta (ocean cooling)
42     c Typical range: -350 < swflux < 0
43     c Southwest C-grid tracer point
44     c Input field
45     c
46     c uwind :: Surface (10-m) zonal wind velocity in m/s
47     c > 0 for increase in uVel, which is west to
48     c east for cartesian and spherical polar grids
49     c Typical range: -10 < uwind < 10
50     c Southwest C-grid U point
51     c Input or input/output field
52     c
53     c vwind :: Surface (10-m) meridional wind velocity in m/s
54     c > 0 for increase in vVel, which is south to
55     c north for cartesian and spherical polar grids
56     c Typical range: -10 < vwind < 10
57     c Southwest C-grid V point
58     c Input or input/output field
59     c
60     c atemp :: Surface (2-m) air temperature in deg K
61     c Typical range: 200 < atemp < 300
62     c Southwest C-grid tracer point
63     c Input or input/output field
64     c
65     c aqh :: Surface (2m) specific humidity in kg/kg
66     c Typical range: 0 < aqh < 0.02
67     c Southwest C-grid tracer point
68     c Input or input/output field
69     c
70     c lwflux :: Net upward longwave radiation in W/m^2
71     c lwflux = - ( lwdown - ice and snow absorption - emitted )
72     c > 0 for decrease in theta (ocean cooling)
73     c Typical range: -20 < lwflux < 170
74     c Southwest C-grid tracer point
75     c Input field
76     c
77     c evap :: Evaporation in m/s
78     c > 0 for increase in salt (ocean salinity)
79     c Typical range: 0 < evap < 2.5e-7
80     c Southwest C-grid tracer point
81     c Input, input/output, or output field
82     c
83     c precip :: Precipitation in m/s
84     c > 0 for decrease in salt (ocean salinity)
85     c Typical range: 0 < precip < 5e-7
86     c Southwest C-grid tracer point
87     c Input or input/output field
88     c
89     c runoff :: River and glacier runoff in m/s
90     c > 0 for decrease in salt (ocean salinity)
91     c Typical range: 0 < runoff < ????
92     c Southwest C-grid tracer point
93     c Input or input/output field
94     c !!! WATCH OUT: Default exf_inscal_runoff !!!
95     c !!! in exf_readparms.F is not 1.0 !!!
96     c
97     c swdown :: Downward shortwave radiation in W/m^2
98     c > 0 for increase in theta (ocean warming)
99     c Typical range: 0 < swdown < 450
100     c Southwest C-grid tracer point
101     c Input/output field
102     c
103     c lwdown :: Downward longwave radiation in W/m^2
104     c > 0 for increase in theta (ocean warming)
105     c Typical range: 50 < lwdown < 450
106     c Southwest C-grid tracer point
107     c Input/output field
108     c
109     c apressure :: Atmospheric pressure field in N/m^2
110     c > 0 for ????
111     c Typical range: ???? < apressure < ????
112     c Southwest C-grid tracer point
113     c Input field
114     C
115     C
116     c NOTES:
117     c ======
118     c
119     c Input and output units and sign conventions can be customized
120     c using variables exf_inscal_* and exf_outscal_*, which are set
121     c by exf_readparms.F
122     c
123     c Output fields fu, fv, Qnet, Qsw, and EmPmR are
124     c defined in FFIELDS.h
125     c
126     c #ifndef SHORTWAVE_HEATING, hflux includes shortwave,
127     c that is, hflux = latent + sensible + lwflux +swflux
128     c
129     c If (EXFwindOnBgrid .EQ. .TRUE.), uwind and vwind are
130     c defined on northeast B-grid U and V points, respectively.
131     c
132     c Arrays *0 and *1 below are used for temporal interpolation.
133     \end{verbatim}
134     }
135    

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