/[MITgcm]/MITgcm/verification/aim.5l_cs/input/data.aimphys
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Revision 1.1 - (hide annotations) (download)
Wed Oct 9 01:05:03 2002 UTC (21 years, 6 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint46l_post, checkpoint46l_pre, checkpoint46k_post, checkpoint46m_post, checkpoint47
 - read AIM physics parameters from a file (data.aimphys)

1 jmc 1.1 # AIM physics package parameters:
2    
3     #-- Physical constants
4     # P0 = reference pressure
5     # GG = gravity accel.
6     # RD = gas constant for dry air
7     # CP = specific heat at constant pressure
8     # ALHC = latent heat of condensation
9     # SBC = Stefan-Boltzmann constant
10    
11     #-- Constants for forcing fields (namelist AIM_PAR_FOR):
12     # SOLC = Solar constant (area averaged) in W/m^2
13     # ALBSEA = Albedo over sea
14     # ALBICE = Albedo over sea ice (for ice fraction = 1)
15     # ALBSN = Albedo over snow (for snow depth > SDALB)
16     # SDALB = Snow depth corresponding to maximum albedo
17     # SWCAP = Soil wetness capacity
18     # SWWIL = Soil wetness at wilting point
19     &AIM_PAR_FOR
20     &
21    
22     #-- Constants for surface fluxes (namelist AIM_PAR_SFL):
23     # FWIND0 = ratio of near-sfc wind to lowest-level wind
24     # FTEMP0 = weight for near-sfc temperature extrapolation (0-1) :
25     # 1 : linear extrapolation from two lowest levels
26     # 0 : constant potential temperature ( = lowest level)
27     # FHUM0 = weight for near-sfc specific humidity extrapolation (0-1) :
28     # 1 : extrap. with constant relative hum. ( = lowest level)
29     # 0 : constant specific hum. ( = lowest level)
30     # CDL = drag coefficient for momentum over land
31     # CDS = drag coefficient for momentum over sea
32     # CHL = heat exchange coefficient over land
33     # CHS = heat exchange coefficient over sea
34     # VGUST = wind speed for sub-grid-scale gusts
35     # SWMAX = Soil wetness (in mm) corresp. to potential evapotranspiration
36     &AIM_PAR_SFL
37     FWIND0 = 0.42,
38     FTEMP0 = 0.,
39     CHL = 2.0e-3,
40     CHS = 0.9e-3,
41     VGUST = 4.,
42     &
43    
44     #-- Convection constants (namelist AIM_PAR_CNV):
45     # RHBL = relative hum. threshold in the boundary (lowest) layer
46     # TRCNV = time of relaxation (in hours) towards neutral equilibrium
47     # ENTMAX = max. entrainment as a fraction of cloud-base mass flux
48     &AIM_PAR_CNV
49     &
50    
51     #-- Constants for large-scale condendation (namelist AIM_PAR_LSC):
52     # RHLSC = Relative humidity threshold
53     # TRLSC = Relaxation time (in hours) for supersat. specific humidity
54     &AIM_PAR_LSC
55     &
56    
57     #-- Radiation constants (namelist AIM_PAR_RAD):
58     # ABSSW = shortwave absorptivity for dry air (per dp = 10^5 Pa)
59     # ABSLW = longwave absorptivity for dry air (per dp = 10^5 Pa)
60     # ABWSW = shortwave absorptivity for water vapour (per dq = 1 g/kg)
61     # ABWLW = longwave absorptivity for water vapour (per dq = 1 g/kg)
62     # ABCSW = shortwave absorptivity for cloud fraction
63     # ABCLW = longwave absorptivity for cloud fraction
64     # EPSSW = fraction of incoming solar radiation absorbed by ozone
65     # EPSLW = fraction of surface LW radiation emitted directly to space
66     # ALBCL = cloud albedo (for cloud cover = 1)
67     # RHCL1 = relative hum. corresponding to cloud cover = 0
68     # RHCL2 = relative hum. corresponding to cloud cover = 1
69     # QACL = specific hum. threshold for cloud cover
70     &AIM_PAR_RAD
71     ABWLW = 0.60,
72     ALBCL = 0.34,
73     RHCL1 = 0.50,
74     RHCL2 = 0.90,
75     QACL = 0.50,
76     &
77    
78     #-- Constants for vertical dif. and sh. conv. (namelist AIM_PAR_VDI):
79     # TRVDI = relaxation time (in hours) for moisture diffusion
80     # TRSHC = relaxation time (in hours) for shallow convection
81     &AIM_PAR_VDI
82     TRVDI = 48.,
83     TRSHC = 12.,
84     &

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