Data archive for monthly forecasting

Upper-air fields (archived every 12 hours):

129	Geopotential	1000	925	850	700	500	-	-	200	100	50	10	(also MEAN of each level)
130	Temperature	1000	925	850	700	500	400	300	200	100	50	10	(also MEAN of each level)
138	Vorticity (relative)	1000	925	850	700	500	-	-	200	100	50	10	(also MEAN of each level)
155	Divergence	1000	925	850	700	500	-	-	200	100	50	10	(also MEAN of each level)
133	Specific humidity (gridpoint)	1000	925	850	700	500	-	-	200	100	50	10	(also MEAN of each level)
001	Stream function	-	-	-	-	-	-	-	200	-	-	-	(also MEAN of each level)
002	Velocity potential	-	-	-	-	-	-	-	200	-	-	-	(also MEAN of each level)

60

Potential vorticity on the 330K isentropic surface

MEAN

03

Potential temperature on the 2E-6 potential vorticity surface

MEAN

 

Surface fields:

The following surface fields are archived every 6 hours (16 fields):

31	Sea-ice cover (since June 2005)	MEAN/MAX/MIN/SD
39	Volumetric soil water layer 1	MEAN/MAX/MIN/SD
49	Wind gust at 10m	MEAN/MAX/MIN/SD
139	Soil temp level  1	MEAN/MAX/MIN/SD
142	Large scale precipitation	MEAN/MAX/MIN/SD
143	Convective precipitation	MEAN/MAX/MIN/SD
144	Snow fall	MEAN/MAX/MIN/SD
151	Mean sea level pressure	MEAN/MAX/MIN/SD
159	Boundary layer height	MEAN/MAX/MIN/SD
164	Total cloud cover	MEAN/MAX/MIN/SD
165	10 metre u wind component	MEAN/MAX/MIN/SD
166	10 metre v wind component	MEAN/MAX/MIN/SD
167	2 metre temperature	MEAN/MAX/MIN/SD
168	2 metre dewpoint temperature	MEAN/MAX/MIN/SD
189	Sunshine duration	MEAN/MAX/MIN/SD
201	Max 2m temperature since last postprocessing	MEAN/MAX/MIN/SD
202	Min 2m temperature since last postprocessing	MEAN/MAX/MIN/SD
228	Total precipitation	MEAN/MAX/MIN/SD

The following surface fields are archived every 24 hours (16 fields):

40	Volumetric soil water layer 2	MEAN/MAX/MIN/SD
41	Volumetric soil water layer 3	MEAN/MAX/MIN/SD
42	Volumetric soil water layer 4	MEAN/MAX/MIN/SD
141	Snow depth	MEAN/MAX/MIN/SD
146	Surface sensible heat flux	MEAN/MAX/MIN/SD
147	Surface latent heat flux	MEAN/MAX/MIN/SD
169	Surface solar radiation downwards	MEAN/MAX/MIN/SD
170	Soil temp level 2	MEAN/MAX/MIN/SD)
175	Surface thermal radiation downwards	MEAN/MAX/MIN/SD
176	Surface solar radiation	MEAN/MAX/MIN/SD
177	Surface thermal radiation	MEAN/MAX/MIN/SD
178	Top solar radiation	MEAN/MAX/MIN/SD
179	Top thermal radiation	MEAN/MAX/MIN/SD
180	East/West surface stress	MEAN/MAX/MIN/SD
181	North/South surface stress	MEAN/MAX/MIN/SD
182	Evaporation	MEAN/MAX/MIN/SD

The following field is archive only at step=0 and 24 and for the control forecast (type=cf):

172

Land/sea mask

The following derived fields are not archived directly, but their weekly statistics are calculated:

207

10m scalar wind speed

MEAN/MAX/MIN/SD

Monthly archive of ocean fields:

Ocean data is output in different sections, H = horizontal, Z = zonal, M = meridional. There are also sections that include the time dimension: Z=longitude-time, M=latitude-time and V=depth-time. Each of these sections is a two-dimensional field, with a particular orientation in space and time. Each forecast ensemble member archives the output listed below. The ocean data is archived together with the atmosphere data, and is distinguished by the 'LEVTYPE' attribute, which is set to 'DEPTH' or 'DP'.

The following instantaneous fields are written every 24 hours. They should allow a rough estimate of drift in the ocean, and give a snapshot of any numerical problems.

Horizontal fields are:

Section	Code	Depth	Name
H	129	5/425	Potential temperature
H	130	5/425	Salinity
H	131	5	u-velocity
H	132	5	v-velocity
H	145	0	Sea-level
H	148	0	Mixed-layer depth
H	133	225	w-velocity

 Vertical zonal sections are:

Section	Code	Latitude	Name
Z	129	0	Potential temperature
Z	130	0	Salinity
Z	131	0	u-velocity
Z	132	0	v-velocity
Z	133	0	w-velocity

Vertical meridional sections are:

Section	Code	Longitude	Name
M	129	220	Potential temperature
M	130	220	Salinity
M	131	220	u-velocity
M	132	220	v-velocity
M	133	220	w-velocity

The following accumulated fields are written once per month during the forecasts. Monthly means can be derived from them. They are the main fields for diagnosing the oceanic behaviour of the coupled model forecasts.
Accumulated horizontal fields are:

Section	Code	Depth	Name
H	129	5	Potential temperature
H	130	5	Salinity
H	131	5	u-velocity
H	132	5	v-velocity
H	145	0	Sea level
H	148	0	Mixed layer depth
H	163	0	Depth of 20 deg isotherm
H	164	0	T averaged over upper 300m
H	175	0	S averaged over upper 300m
H	153	0	Zonal wind stress
H	154	0	Meridional wind stress
H	156	0	Net surface heat flux
H	157	0	Absorbed solar radiation
H	158	0	Precipitation - Evaporation

Accumulated vertical zonal sections are:

Accumulated vertical meridional sections are:

Several so-called time series fields are also produced. These allow detailed examination of the evolution of certain fields along given lines of latitude or longitude. In all cases the temporal resolution is daily.

Lines of latitude are:

Lines of longitude are:

Finally, a small selection of instantaneous fields is output daily, to allow study of the evolution of the system on synoptic timescales. The fields concerned are:

Probabilities (since 30 June 2005):

Anomaly events:

Parameter name	Acronym	Grib code	Table 2 version
2m temperature warm anomaly of at least 2K	2TWA2K	1	131
2m temperature warm anomaly of at least 1K	2TWA1K	2	131
2m temperature warm anomaly of at least 0K	2TWA0K	3	131
2m temperature cold anomaly of at least 1K	2TCA1K	4	131
2m temperature cold anomaly of at least 2K	2TCA2K	5	131
Total precipitation anomaly of at least 20 mm/week	TPAGT20	6	131
Total precipitation anomaly of at least 10 mm/week	TPAGT10	7	131

Probability distribution :

Quantile		Distribution	Number	Total number	Mars request
quintile	1st	0 to 20%	1	5	1:5
	2nd	20 to 40%	2	5	2:5
	3rd	40 to 60%	3	5	3:5
	4th	60 to 80%	4	5	4:5
	5th	80 to 100%	5	5	5:5
tercile	1st	0 to 33.333%	1	3	1:3
	2nd	33.333 to 66.666%	2	3	2:3
	3rd	66.666 to 100%	3	3	3:3
decile	1st	0 to 10%	1	10	1:10
	10th	90 to 100%	10	10	10:10

Probabilty boundary:

Quantile		Distribution	Number	Total number	Mars request
quintile	1st	20%	1	5	1:5
	2nd	40%	2	5	2:5
	3rd	60%	3	5	3:5
	4th	80%	4	5	4:5
tercile	1st	33.333%	1	3	1:3
	2nd	66.666%	2	3	2:3
decile	1st	10%	1	10	1:10
	10th	90%	9	10	9:10