VM - GRIB - WMO version 37 Table Code/Flag

Values

Code table 4.5 - Fixed surface types and units

Bit No.	Description	Unit	Status
0	Reserved		Operational
1	Ground or water surface	-	Operational
2	Cloud base level	-	Operational
3	Level of cloud tops	-	Operational
4	Level of 0 °C isotherm	-	Operational
5	Level of adiabatic condensation lifted from the surface	-	Operational
6	Maximum wind level	-	Operational
7	Tropopause	-	Operational
8	Nominal top of the atmosphere	-	Operational
9	Sea bottom	-	Operational
10	Entire atmosphere	-	Operational
11	Cumulonimbus (CB) base	m	Operational
12	Cumulonimbus (CB) top	m	Operational
13	Lowest level where vertically integrated cloud cover exceeds the specified percentage (cloud base for a given percentage cloud cover)	%	Operational
14	Level of free convection (LFC)	-	Operational
15	Convective condensation level (CCL)	-	Operational
16	Level of neutral buoyancy or equilibrium level (LNB)	-	Operational
17	Departure level of the most unstable parcel of air (MUDL)	-	Operational
18	Departure level of a mixed layer parcel of air with specified layer depth	Pa	Operational
19	Lowest level where cloud cover exceeds the specified percentage	%	Operational
20	Isothermal level	K	Operational
21	Lowest level where mass density exceeds the specified value (base for a given threshold of mass density)	kg m-3	Operational
22	Highest level where mass density exceeds the specified value (top for a given threshold of mass density)	kg m-3	Operational
23	Lowest level where air concentration exceeds the specified value (base for a given threshold of air concentration)	Bq m-3	Operational
24	Highest level where air concentration exceeds the specified value (top for a given threshold of air concentration)	Bq m-3	Operational
25	Highest level where radar reflectivity exceeds the specified value (echo top for a given threshold of reflectivity)	dBZ	Operational
26	Convective cloud layer base	m	Operational
27	Convective cloud layer top	m	Operational
28	Effective inflow layer base		Operational
29	Effective inflow layer top		Operational
30	Specified radius from the centre of the Sun	m	Operational
31	Solar photosphere		Operational
32	Ionospheric D-region level		Operational
33	Ionospheric E-region level		Operational
34	Ionospheric F1-region level		Operational
35	Ionospheric F2-region level		Operational
36	Stratopause		Operational
37	Hygropause		Operational
38-99	Reserved		Operational
100	Isobaric surface	Pa	Operational
101	Mean sea level		Operational
102	Specific altitude above mean sea level	m	Operational
103	Specified height level above ground	m	Operational
104	Sigma level	"sigma" value	Operational
105	Hybrid level	-	Operational
106	Depth below land surface	m	Operational
107	Isentropic (theta) level	K	Operational
108	Level at specified pressure difference from ground to level	Pa	Operational
109	Potential vorticity surface	K m2 kg-1 s-1	Operational
110	Reserved		Operational
111	Eta level	-	Operational
112	Reserved		Operational
113	Logarithmic hybrid level		Operational
114	Snow level	Numeric	Operational
115	Sigma height level	-	Operational
116	Reserved		Operational
117	Mixed layer depth	m	Operational
118	Hybrid height level	-	Operational
119	Hybrid pressure level	-	Operational
120-149	Reserved		Operational
150	Generalized vertical height coordinate		Operational
151	Soil level	Numeric	Operational
152	Sea-ice level	Numeric	Operational
153-159	Reserved		Operational
160	Depth below sea level	m	Operational
161	Depth below water surface	m	Operational
162	Lake or river bottom	-	Operational
163	Bottom of sediment layer	-	Operational
164	Bottom of thermally active sediment layer	-	Operational
165	Bottom of sediment layer penetrated by thermal wave	-	Operational
166	Mixing layer	-	Operational
167	Bottom of root zone	-	Operational
168	Ocean model level	Numeric	Operational
169	Ocean level defined by water density (sigma-theta) difference from near-surface to level	kg m-3	Operational
170	Ocean level defined by water potential temperature difference from near-surface to level	K	Operational
171	Ocean level defined by vertical eddy diffusivity difference from near-surface to level	m2 s-1	Operational
172	Ocean level defined by water density (rho) difference from near-surface to level	m	Operational
173	Top of snow over sea ice on sea, lake or river	-	Operational
174	Top surface of ice on sea, lake or river	-	Operational
175	Top surface of ice, under snow cover, on sea, lake or river	-	Operational
176	Bottom surface (underside) ice on sea, lake or river	-	Operational
177	Deep soil (of indefinite depth)	-	Operational
178	Reserved	-	Operational
179	Top surface of glacier ice and inland ice	-	Operational
180	Deep inland or glacier ice (of indefinite depth)	-	Operational
181	Grid tile land fraction as a model surface	-	Operational
182	Grid tile water fraction as a model surface	-	Operational
183	Grid tile ice fraction on sea, lake or river as a model surface	-	Operational
184	Grid tile glacier ice and inland ice fraction as a model surface	-	Operational
185	Roof level	-	Operational
186	Wall level	-	Operational
187	Road level	-	Operational
188	Melt pond top surface	-	Operational
189	Melt pond bottom surface	-	Operational
190	Reserved		Operational
191	Abstract level with no vertical localization	-	Operational
192-254	Reserved for local use		Operational
255	Missing		Operational

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