Dataset
Met Office stratospheric assimilated: standard assimilated data from 1991 to 2022
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. Data is provided from 1991 to 2022.
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.
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. 10-Sep-2022: Updates for this data have been discontinued due to low data usage. |
| Data Quality: |
See dataset associated documentation.
|
| File Format: |
Data are PP formatted
|
Related Documents
Process overview
| 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
- units: m s-1
- long_name: 10 METRE WIND V-COMP
- units: m s-1
- long_name: 50 METRE WIND U-COMPONENT
- units: m s-1
- long_name: 50 METRE WIND V-COMPONENT
- units: m
- long_name: BOUNDARY LAYER DEPTH AFTER TIMESTEP
- units: W m-2
- long_name: CLEAR-SKY (II) UPWARD LW FLUX (TOA)
- units: W m-2
- long_name: CLEAR-SKY (II) UPWARD SW FLUX (TOA)
- units: kg m-2
- long_name: CONVECTIVE RAIN AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: CONVECTIVE RAINFALL RATE KG/M2/S
- units: kg m-2
- long_name: CONVECTIVE SNOW AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: CONVECTIVE SNOWFALL RATE KG/M2/S
- units: K
- long_name: DEWPOINT AT 1.5M (K)
- units: W m-2
- long_name: DOWNWARD LW RAD FLUX: SURFACE
- units: K m2 s-1 kg-1
- long_name: ERTEL POTENTIAL VORTICITY(THETA LEV)
- units: kg m-2
- long_name: EVAP FROM SOIL SURF -AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: EVAPORATION FROM SEA (GBM) KG/M2/S
- units: 0-1
- long_name: 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_vn1006
- units: m
- var_id: ht
- long_name: GEOPOTENTIAL HEIGHT: PRESSURE LEVELS
- units: W m-2
- long_name: HEAT FLUX THROUGH SEA ICE (GBM) W/M2
- long_name: HIGH CLOUD AMOUNT
- units: m
- var_id: ht
- standard_name: geopotential_height
- long_name: Height
- long_name: ICAO HT OF CONVECTIVE CLOUD BASE
- long_name: ICAO HT OF CONVECTIVE CLOUD TOP
- units: kft
- long_name: ICAO HT OF LOWEST CONV CLOUD BASE
- units: kft
- long_name: ICAO HT OF LOWEST CONV CLOUD TOP
- units: W m-2
- long_name: INCOMING SW RAD FLUX (TOA): ALL TSS
- long_name: LAND MASK (LOGICAL: LAND=TRUE)
- units: kg m-2
- long_name: LAND SNOW MELT AMOUNT KG/M2/TS
- units: kg m-2
- long_name: LARGE SCALE RAIN AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: LARGE SCALE RAINFALL RATE KG/M2/S
- units: kg m-2
- long_name: LARGE SCALE SNOW AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: LARGE SCALE SNOWFALL RATE KG/M2/S
- long_name: LOW CLOUD AMOUNT
- units: kg m-2
- long_name: LOWEST CONV CLOUD AMOUNT AFTER CONV
- long_name: MEDIUM CLOUD AMOUNT
- units: W m-2
- long_name: NET DOWN LW RAD FLUX: OPEN SEA
- units: W m-2
- long_name: NET DOWN SURFACE LW RAD FLUX
- long_name: NET DOWN SURFACE SW FLUX: SW TS ONLY
- units: W m-2
- units: 0-12
- units: Pa s-1
- long_name: OMEGA ON PRESSURE LEVELS
- units: m
- long_name: OROGRAPHY (/STRAT LOWER BC)
- units: W m-2
- long_name: OUTGOING LW RAD FLUX (TOA)
- units: W m-2
- long_name: OUTGOING SW RAD FLUX (TOA)
- units: Pa s-1
- var_id: omega
- long_name: Omega (= dp/dt)
- long_name: PRESSURE AT CONVECTIVE CLOUD BASE
- long_name: PRESSURE AT CONVECTIVE CLOUD TOP
- units: Pa
- long_name: PRESSURE AT LOWEST CONV CLOUD BASE
- units: Pa
- long_name: PRESSURE AT LOWEST CONV CLOUD TOP
- units: Pa
- long_name: PRESSURE AT MEAN SEA LEVEL
- units: 0-1
- long_name: PROBABILITY OF VIS LESS THAN 5 KM
- units: mbar
- long_name: Pressure
- var_id: p
- long_name: RELATIVE HUMIDITY AT 1.5M
- units: m
- long_name: ROUGHNESS LENGTH AFTER TIMESTEP
- units: 0-1
- long_name: SEA ICE FRACTION AFTER TIMESTEP
- units: W m-2
- long_name: SEAICE TOP MELTING LH FLUX(GBM) W/M2
- units: kg m-2
- long_name: SNOW AMOUNT AFTER TIMESTEP KG/M2
- units: kg m-2
- long_name: SOIL MOISTURE CONTENT
- units: kg kg-1
- long_name: SPECIFIC HUMIDITY AT 1.5M
- units: m
- long_name: STANDARD DEVIATION OF OROGRAPHY
- units: kg m-2
- long_name: SUBLIM. FROM SURFACE (GBM) KG/M2/TS
- units: kg m-2 s-1
- long_name: SURF & BL TOTL MOISTURE FLUX KG/M2/S
- units: W m-2
- long_name: SURFACE & B.LAYER HEAT FLUXES W/M2
- units: W m-2
- long_name: SURFACE LATENT HEAT FLUX W/M2
- units: kg m-2
- long_name: SURFACE RUNOFF AMOUNT KG/M2/TS
- long_name: SURFACE SH FLUX FROM SEA (GBM) W/M2
- units: W m-2
- units: K
- long_name: SURFACE TEMPERATURE AFTER TIMESTEP
- units: m s-1
- standard_name: northward_wind
- var_id: v
- long_name: Southerly component of wind v
- units: K
- long_name: TEMPERATURE AT 1.5M
- units: K
- standard_name: air_temperature
- long_name: TEMPERATURE ON P LEV/P GRID
- var_id: UM_m01s16i203_vn1006
- units: K
- var_id: temp
- long_name: TEMPERATURE ON PRESSURE LEVELS
- units: 0-1
- long_name: TOTAL CLOUD AMOUNT - RANDOM OVERLAP
- units: 0-1
- long_name: TOTAL CLOUD AMOUNT MAX/RANDOM OVERLP
- units: W m-2
- long_name: TOTAL DOWNWARD SURFACE SW FLUX
- units: kg m-2
- long_name: TOTAL PRECIPITATION AMOUNT KG/M2/TS
- units: kg m-2 s-1
- long_name: TOTAL PRECIPITATION RATE KG/M2/S
- units: kg m-2 s-1
- long_name: TOTAL SURF MOIST FLUX PER TIMESTEP
- units: K
- standard_name: air_temperature
- long_name: Temperature T
- var_id: temp
- units: m s-1
- long_name: U COMPNT OF WIND ON PRESSURE LEVELS
- var_id: u
- units: m s-1
- standard_name: eastward_wind
- long_name: U WIND ON PRESSURE LEVELS B GRID
- var_id: UM_m01s15i201_vn1006
- units: m s-1
- long_name: V COMPNT OF WIND ON PRESSURE LEVELS
- var_id: v
- units: m s-1
- standard_name: northward_wind
- long_name: V WIND ON PRESSURE LEVELS B GRID
- var_id: UM_m01s15i202_vn1006
- units: m
- long_name: 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
- units: m s-1
- standard_name: upward_air_velocity
- long_name: W COMPNT (OF WIND) ON PRESSURE LEVS
- var_id: UM_m01s15i242_vn1006
- units: m
- long_name: WET BULB FREEZING LEV HEIGHT (M)
- units: K
- long_name: WET BULB POTENTIAL TEMPERATURE
- units: W m-2
- long_name: 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
- units: Pa
- standard_name: air_pressure
- var_id: z1_p_level
- units: K
- standard_name: air_temperature
- var_id: 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
- units: hours
- standard_name: forecast_period
- var_id: forecast_period
- standard_name: forecast_reference_time
- var_id: forecast_reference_time
- units: m
- standard_name: geopotential_height
- var_id: 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
- units: mbar
- var_id: pseudo
- var_id: t_1
- long_name: 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
- units: m s-1
- standard_name: x_wind
- var_id: x_wind
- units: m s-1
- standard_name: y_wind
- var_id: y_wind
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- var_id: latitude1
- units: degrees_east
- standard_name: longitude
- var_id: longitude1
- standard_name: time
- var_id: time0
Temporal Range
2006-03-03T00:00:00
2022-09-10T00:00:00
Geographic Extent
90.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |