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Dataset

 

Met Office stratospheric assimilated: standard assimilated data from 1991 to present

Update Frequency: Daily
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2007-02-05
Download Stats: last 12 months

Abstract

This dataset contains standard assimilated data concerning stratospheric temperature, geopotential height and wind components produced by the Stratospheric Data Assimilation System at the UK Met Office.

The data assimilation system is a development of the scheme used at the Met Office for operational weather forecasting, which has been extended to cover the stratosphere. The primary product is a daily analysis (at 1200 UTC) which is produced using operational observations only. For short periods of particular interest the analyses are available at 6-hourly intervals. Assimilation experiments using UARS (Upper Atmosphere Research Satellite) data in addition to operational meteorological observations have been carried out for limited periods.

The global model producing this data was updated on July 11th 2017. Data from this date has an increased resolution of N1280L70: 2560 latitude x1920 longitude and vertical 70 levels (model top 80 km), see the documentation for full details.

Citable as:  Met Office (2007): Met Office stratospheric assimilated: standard assimilated data from 1991 to present. NCAS British Atmospheric Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/7a62862f2f43c0bdf4e7d152b6cb59e4
Abbreviation: Not defined
Keywords: Met Office, meteorology, statospheric, uars, assim, assimilated

Details

Previous Info:

2020-01-09 From 2020 the archive will only hold the "pp" file format, conversion to NetCDF will no longer occur. 2020-01-09 From 2020 the archive will only hold the "pp" file format, conversion to NetCDF will no longer occur.

2017-08-16 NetCDF data from 11-Jul-2017 is converted using an updated methodology, see http://data.ceda.ac.uk/badc/ukmo-assim/doc/ukmoassi… Show More 2017-08-16 NetCDF data from 11-Jul-2017 is converted using an updated methodology, see http://data.ceda.ac.uk/badc/ukmo-assim/doc/ukmoassim_netcdf_metadata_update_20170816.pdf for details. Show Less

Previously used record identifiers:
http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dep_11706953850313870
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/ukmo_agreement.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data are sent from the Met Office and to the Centre for Environmental Data Analysis (CEDA) for long term archival.

CEDA archive the Met Office Unified Model "pp" output files directly and additionally convert the raw "pp" files into NetCDF data files that are archived alongside the "pp" data.

11-July-2017: On the 11th of July 2017 a new operational model came into use, this increased both the horizontal and vertical resolutions of the data. Additionally on this date, the "pp" to NetCDF format conversion tool was changed from Convsh for all files prior to this date to CF-Python to all NetCDF data from 2017-08-11.

09-Jan-2020: From 2020 the archive will only hold the "pp" file format, conversion to NetCDF will no longer occur. Historical NetCDF files will remain on the archive but conversions will no longer be performed after this date.

Data Quality:
See dataset associated documentation.
File Format:
Data are PP formatted

Related Documents

No documents related to this record were found.

Process overview

This dataset was generated by the computation detailed below.
Title Met Office Extended Operational NWP model deployed on Met Office supercomputer (Exeter)
Abstract This computation involved: Met Office Extended Operational NWP model deployed on Met Office supercomputer (Exeter). The version of the Unified Model (UM) model currently being used for stratospheric data assimilation is the 50-level troposphere-stratosphere configuration. This model includes a scheme to represent forcing from a full spectrum of gravity wave phase speeds, and a simple representation of methane oxidation has been included to improve the simulation of water vapour.
Input Description None
Output Description None
Software Reference None
  • units: m s-1
  • long_name: 10 METRE WIND U-COMP
  • names: 10 METRE WIND U-COMP
  • units: m s-1
  • long_name: 10 METRE WIND V-COMP
  • names: 10 METRE WIND V-COMP
  • units: m s-1
  • long_name: 50 METRE WIND U-COMPONENT
  • names: 50 METRE WIND U-COMPONENT
  • units: m s-1
  • long_name: 50 METRE WIND V-COMPONENT
  • names: 50 METRE WIND V-COMPONENT
  • units: m
  • long_name: BOUNDARY LAYER DEPTH AFTER TIMESTEP
  • names: BOUNDARY LAYER DEPTH AFTER TIMESTEP
  • units: W m-2
  • long_name: CLEAR-SKY (II) UPWARD LW FLUX (TOA)
  • names: CLEAR-SKY (II) UPWARD LW FLUX (TOA)
  • units: W m-2
  • long_name: CLEAR-SKY (II) UPWARD SW FLUX (TOA)
  • names: CLEAR-SKY (II) UPWARD SW FLUX (TOA)
  • units: kg m-2
  • long_name: CONVECTIVE RAIN AMOUNT KG/M2/TS
  • names: CONVECTIVE RAIN AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: CONVECTIVE RAINFALL RATE KG/M2/S
  • names: CONVECTIVE RAINFALL RATE KG/M2/S
  • units: kg m-2
  • long_name: CONVECTIVE SNOW AMOUNT KG/M2/TS
  • names: CONVECTIVE SNOW AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: CONVECTIVE SNOWFALL RATE KG/M2/S
  • names: CONVECTIVE SNOWFALL RATE KG/M2/S
  • units: K
  • long_name: DEWPOINT AT 1.5M (K)
  • names: DEWPOINT AT 1.5M (K)
  • units: W m-2
  • long_name: DOWNWARD LW RAD FLUX: SURFACE
  • names: DOWNWARD LW RAD FLUX: SURFACE
  • units: K m2 s-1 kg-1
  • long_name: ERTEL POTENTIAL VORTICITY(THETA LEV)
  • names: ERTEL POTENTIAL VORTICITY(THETA LEV)
  • units: kg m-2
  • long_name: EVAP FROM SOIL SURF -AMOUNT KG/M2/TS
  • names: EVAP FROM SOIL SURF -AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: EVAPORATION FROM SEA (GBM) KG/M2/S
  • names: EVAPORATION FROM SEA (GBM) KG/M2/S
  • units: 0-1
  • long_name: FOG FRACTION AT 1.5 M
  • names: FOG FRACTION AT 1.5 M
  • units: m
  • standard_name: geopotential_height
  • long_name: GEOPOTENTIAL HEIGHT ON P LEV/P GRID
  • var_id: UM_m01s16i202_vn1101_2
  • names: geopotential_height, GEOPOTENTIAL HEIGHT ON P LEV/P GRID
  • units: m
  • var_id: ht
  • long_name: GEOPOTENTIAL HEIGHT: PRESSURE LEVELS
  • names: GEOPOTENTIAL HEIGHT: PRESSURE LEVELS, ht
  • units: W m-2
  • long_name: HEAT FLUX THROUGH SEA ICE (GBM) W/M2
  • names: HEAT FLUX THROUGH SEA ICE (GBM) W/M2
  • long_name: HIGH CLOUD AMOUNT
  • names: HIGH CLOUD AMOUNT
  • units: m
  • var_id: ht
  • standard_name: geopotential_height
  • long_name: Height
  • names: ht, geopotential_height, Height
  • long_name: ICAO HT OF CONVECTIVE CLOUD BASE
  • names: ICAO HT OF CONVECTIVE CLOUD BASE
  • long_name: ICAO HT OF CONVECTIVE CLOUD TOP
  • names: ICAO HT OF CONVECTIVE CLOUD TOP
  • units: kft
  • long_name: ICAO HT OF LOWEST CONV CLOUD BASE
  • names: ICAO HT OF LOWEST CONV CLOUD BASE
  • units: kft
  • long_name: ICAO HT OF LOWEST CONV CLOUD TOP
  • names: ICAO HT OF LOWEST CONV CLOUD TOP
  • units: W m-2
  • long_name: INCOMING SW RAD FLUX (TOA): ALL TSS
  • names: INCOMING SW RAD FLUX (TOA): ALL TSS
  • long_name: LAND MASK (LOGICAL: LAND=TRUE)
  • names: LAND MASK (LOGICAL: LAND=TRUE)
  • units: kg m-2
  • long_name: LAND SNOW MELT AMOUNT KG/M2/TS
  • names: LAND SNOW MELT AMOUNT KG/M2/TS
  • units: kg m-2
  • long_name: LARGE SCALE RAIN AMOUNT KG/M2/TS
  • names: LARGE SCALE RAIN AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: LARGE SCALE RAINFALL RATE KG/M2/S
  • names: LARGE SCALE RAINFALL RATE KG/M2/S
  • units: kg m-2
  • long_name: LARGE SCALE SNOW AMOUNT KG/M2/TS
  • names: LARGE SCALE SNOW AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: LARGE SCALE SNOWFALL RATE KG/M2/S
  • names: LARGE SCALE SNOWFALL RATE KG/M2/S
  • long_name: LOW CLOUD AMOUNT
  • names: LOW CLOUD AMOUNT
  • units: kg m-2
  • long_name: LOWEST CONV CLOUD AMOUNT AFTER CONV
  • names: LOWEST CONV CLOUD AMOUNT AFTER CONV
  • long_name: MEDIUM CLOUD AMOUNT
  • names: MEDIUM CLOUD AMOUNT
  • units: W m-2
  • long_name: NET DOWN LW RAD FLUX: OPEN SEA
  • names: NET DOWN LW RAD FLUX: OPEN SEA
  • units: W m-2
  • long_name: NET DOWN SURFACE LW RAD FLUX
  • names: NET DOWN SURFACE LW RAD FLUX
  • long_name: NET DOWN SURFACE SW FLUX: SW TS ONLY
  • units: W m-2
  • names: NET DOWN SURFACE SW FLUX: SW TS ONLY
  • units: Pa
  • units: m
  • units: m s-1
  • units: 0-1
  • units: K
  • units: kg m-2 s-1
  • units: kft
  • units: N m-2
  • units: K (6hr)-1
  • units: s-1
  • units: Pa s-1
  • units: 0-12
  • units: m s-1
  • standard_name: y_wind
  • long_name: None
  • names: y_wind, None
  • units: Pa s-1
  • long_name: OMEGA ON PRESSURE LEVELS
  • names: OMEGA ON PRESSURE LEVELS
  • units: m
  • long_name: OROGRAPHY (/STRAT LOWER BC)
  • names: OROGRAPHY (/STRAT LOWER BC)
  • units: W m-2
  • long_name: OUTGOING LW RAD FLUX (TOA)
  • names: OUTGOING LW RAD FLUX (TOA)
  • units: W m-2
  • long_name: OUTGOING SW RAD FLUX (TOA)
  • names: OUTGOING SW RAD FLUX (TOA)
  • units: Pa s-1
  • var_id: omega
  • long_name: Omega (= dp/dt)
  • names: omega, Omega (= dp/dt)
  • long_name: PRESSURE AT CONVECTIVE CLOUD BASE
  • names: PRESSURE AT CONVECTIVE CLOUD BASE
  • long_name: PRESSURE AT CONVECTIVE CLOUD TOP
  • names: PRESSURE AT CONVECTIVE CLOUD TOP
  • units: Pa
  • long_name: PRESSURE AT LOWEST CONV CLOUD BASE
  • names: PRESSURE AT LOWEST CONV CLOUD BASE
  • units: Pa
  • long_name: PRESSURE AT LOWEST CONV CLOUD TOP
  • names: PRESSURE AT LOWEST CONV CLOUD TOP
  • units: Pa
  • long_name: PRESSURE AT MEAN SEA LEVEL
  • names: PRESSURE AT MEAN SEA LEVEL
  • units: 0-1
  • long_name: PROBABILITY OF VIS LESS THAN 5 KM
  • names: PROBABILITY OF VIS LESS THAN 5 KM
  • units: mbar
  • long_name: Pressure
  • var_id: p
  • names: Pressure
  • long_name: RELATIVE HUMIDITY AT 1.5M
  • names: RELATIVE HUMIDITY AT 1.5M
  • units: m
  • long_name: ROUGHNESS LENGTH AFTER TIMESTEP
  • names: ROUGHNESS LENGTH AFTER TIMESTEP
  • units: 0-1
  • long_name: SEA ICE FRACTION AFTER TIMESTEP
  • names: SEA ICE FRACTION AFTER TIMESTEP
  • units: W m-2
  • long_name: SEAICE TOP MELTING LH FLUX(GBM) W/M2
  • names: SEAICE TOP MELTING LH FLUX(GBM) W/M2
  • units: kg m-2
  • long_name: SNOW AMOUNT AFTER TIMESTEP KG/M2
  • names: SNOW AMOUNT AFTER TIMESTEP KG/M2
  • units: kg m-2
  • long_name: SOIL MOISTURE CONTENT
  • names: SOIL MOISTURE CONTENT
  • units: kg kg-1
  • long_name: SPECIFIC HUMIDITY AT 1.5M
  • names: SPECIFIC HUMIDITY AT 1.5M
  • units: m
  • long_name: STANDARD DEVIATION OF OROGRAPHY
  • names: STANDARD DEVIATION OF OROGRAPHY
  • units: kg m-2
  • long_name: SUBLIM. FROM SURFACE (GBM) KG/M2/TS
  • names: SUBLIM. FROM SURFACE (GBM) KG/M2/TS
  • units: kg m-2 s-1
  • long_name: SURF & BL TOTL MOISTURE FLUX KG/M2/S
  • names: SURF & BL TOTL MOISTURE FLUX KG/M2/S
  • units: W m-2
  • long_name: SURFACE & B.LAYER HEAT FLUXES W/M2
  • names: SURFACE & B.LAYER HEAT FLUXES W/M2
  • units: W m-2
  • long_name: SURFACE LATENT HEAT FLUX W/M2
  • names: SURFACE LATENT HEAT FLUX W/M2
  • units: kg m-2
  • long_name: SURFACE RUNOFF AMOUNT KG/M2/TS
  • names: SURFACE RUNOFF AMOUNT KG/M2/TS
  • long_name: SURFACE SH FLUX FROM SEA (GBM) W/M2
  • units: W m-2
  • names: SURFACE SH FLUX FROM SEA (GBM) W/M2
  • units: K
  • long_name: SURFACE TEMPERATURE AFTER TIMESTEP
  • names: SURFACE TEMPERATURE AFTER TIMESTEP
  • units: m s-1
  • standard_name: northward_wind
  • var_id: v
  • long_name: Southerly component of wind v
  • names: northward_wind, v, Southerly component of wind v
  • units: K
  • long_name: TEMPERATURE AT 1.5M
  • names: TEMPERATURE AT 1.5M
  • units: K
  • standard_name: air_temperature
  • long_name: TEMPERATURE ON P LEV/P GRID
  • var_id: UM_m01s16i203_vn1101
  • names: air_temperature, TEMPERATURE ON P LEV/P GRID
  • units: K
  • var_id: temp
  • long_name: TEMPERATURE ON PRESSURE LEVELS
  • names: temp, TEMPERATURE ON PRESSURE LEVELS
  • units: 0-1
  • long_name: TOTAL CLOUD AMOUNT - RANDOM OVERLAP
  • names: TOTAL CLOUD AMOUNT - RANDOM OVERLAP
  • units: 0-1
  • long_name: TOTAL CLOUD AMOUNT MAX/RANDOM OVERLP
  • names: TOTAL CLOUD AMOUNT MAX/RANDOM OVERLP
  • units: W m-2
  • long_name: TOTAL DOWNWARD SURFACE SW FLUX
  • names: TOTAL DOWNWARD SURFACE SW FLUX
  • units: kg m-2
  • long_name: TOTAL PRECIPITATION AMOUNT KG/M2/TS
  • names: TOTAL PRECIPITATION AMOUNT KG/M2/TS
  • units: kg m-2 s-1
  • long_name: TOTAL PRECIPITATION RATE KG/M2/S
  • names: TOTAL PRECIPITATION RATE KG/M2/S
  • units: kg m-2 s-1
  • long_name: TOTAL SURF MOIST FLUX PER TIMESTEP
  • names: TOTAL SURF MOIST FLUX PER TIMESTEP
  • units: K
  • standard_name: air_temperature
  • long_name: Temperature T
  • var_id: temp
  • names: air_temperature, temp, Temperature T
  • units: m s-1
  • long_name: U COMPNT OF WIND ON PRESSURE LEVELS
  • var_id: u
  • names: U COMPNT OF WIND ON PRESSURE LEVELS, u
  • units: m s-1
  • standard_name: eastward_wind
  • long_name: U WIND ON PRESSURE LEVELS B GRID
  • var_id: UM_m01s15i201_vn1101
  • names: eastward_wind, U WIND ON PRESSURE LEVELS B GRID
  • units: m s-1
  • long_name: V COMPNT OF WIND ON PRESSURE LEVELS
  • var_id: v
  • names: V COMPNT OF WIND ON PRESSURE LEVELS, v
  • units: m s-1
  • standard_name: northward_wind
  • long_name: V WIND ON PRESSURE LEVELS B GRID
  • var_id: UM_m01s15i202_vn1101
  • names: northward_wind, V WIND ON PRESSURE LEVELS B GRID
  • units: m
  • long_name: VISIBILITY AT 1.5M M
  • names: VISIBILITY AT 1.5M M
  • long_name: Vertical Velocity
  • names: Vertical Velocity
  • units: m s-1
  • standard_name: upward_air_velocity
  • long_name: Vertical velocity (= dz/dt)
  • var_id: dz_dt
  • names: upward_air_velocity, dz_dt, Vertical velocity (= dz/dt)
  • units: m s-1
  • standard_name: upward_air_velocity
  • long_name: W COMPNT (OF WIND) ON PRESSURE LEVS
  • var_id: UM_m01s15i242_vn1101
  • names: upward_air_velocity, W COMPNT (OF WIND) ON PRESSURE LEVS
  • units: m
  • long_name: WET BULB FREEZING LEV HEIGHT (M)
  • names: WET BULB FREEZING LEV HEIGHT (M)
  • units: K
  • long_name: WET BULB POTENTIAL TEMPERATURE
  • names: WET BULB POTENTIAL TEMPERATURE
  • units: W m-2
  • long_name: WIND MIXING EN'GY FLUX INTO SEA W/M2
  • names: WIND MIXING EN'GY FLUX INTO SEA W/M2
  • units: m s-1
  • standard_name: eastward_wind
  • var_id: u
  • long_name: Westerly component of wind u
  • names: eastward_wind, u, Westerly component of wind u
  • units: Pa
  • standard_name: air_pressure
  • var_id: z1_p_level
  • names: air_pressure
  • units: K
  • standard_name: air_temperature
  • var_id: air_temperature
  • names: air_temperature
  • var_id: bounds_latitude
  • var_id: bounds_latitude0
  • var_id: bounds_latitude1
  • var_id: bounds_latitude_1
  • var_id: bounds_longitude
  • var_id: bounds_longitude0
  • var_id: bounds_longitude1
  • var_id: bounds_longitude_1
  • units: m s-1
  • var_id: dz_dt
  • names: dz_dt
  • units: hours
  • standard_name: forecast_period
  • var_id: forecast_period
  • names: forecast_period
  • standard_name: forecast_reference_time
  • var_id: forecast_reference_time
  • names: forecast_reference_time
  • units: m
  • standard_name: geopotential_height
  • var_id: geopotential_height
  • names: geopotential_height
  • units: degrees_north
  • var_id: latitude_1
  • var_id: latitude_1_bounds
  • var_id: latitude_bounds
  • var_id: latitude_longitude
  • units: degrees_east
  • var_id: longitude_1
  • var_id: longitude_1_bounds
  • var_id: longitude_bounds
  • units: mbar
  • var_id: p
  • units: mbar
  • var_id: p_1
  • units: hPa
  • long_name: pressure
  • var_id: pressure_0
  • names: pressure
  • units: mbar
  • var_id: pseudo
  • var_id: t_1
  • long_name: t
  • names: t
  • var_id: t_1
  • var_id: time_1_bounds
  • var_id: time_2_bounds
  • units: m s-1
  • standard_name: upward_air_velocity
  • var_id: upward_air_velocity
  • names: upward_air_velocity
  • units: m s-1
  • standard_name: x_wind
  • var_id: x_wind
  • names: x_wind
  • units: m s-1
  • standard_name: y_wind
  • var_id: y_wind
  • names: y_wind

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude1
  • names: latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude1
  • names: longitude
  • standard_name: time
  • var_id: time0
  • names: time
Coverage
Temporal Range
Start time:
2006-03-03T00:00:00
End time:
Ongoing
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°
 
Related parties
Authors (1)