Dataset
Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): nudged data produced by the CESM2-CAM6 model at NCAR
Abstract
This dataset contains model data for SNAPSI experiment 'control' produced by scientists at NCAR (National Center for Atmospheric Research, USA). The data is generated with the coupled climate model CESM2-CAM6.
The SNAPSI project is a model intercomparison project to study the role of the stratosphere in subseasonal forecasts following stratospheric sudden warmings and the representation of stratosphere-troposphere coupling in subseasonal forecast models.
The nudged experiment is a set of retrospective, 45-day, 50-member ensemble forecasts. Following the initial date, the stratospheric zonal mean temperatures and zonal winds are nudged towards the observed time-evolving state. The forecasts are initialized on the date indicated by the sub-experiment id; for instance, the sub-experiment 's20180125' is initialized on 25 January 2018. The ocean, sea-ice, land-surface and ozone are all initialized and run prognostically.
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Sources of additional information
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The following web links are provided in the Details/Docs section of this catalogue record:
- Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): A Protocol for Investigating the Role of the Stratospheric Polar Vortex in Subseasonal to Seasonal Forecasts
- New set of controlled numerical experiments: Stratospheric Nudging And Predictable Surface Impacts (SNAPSI)
Model reference publications:
- Danabasoglu et al. (2020)
- Richter et al. (2021)
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
Use of these data is covered by the following licence(s): https://creativecommons.org/licenses/by-sa/4.0/ When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were produced by scientists at the National Center for Atmospheric Research, USA (NCAR) and published by the Centre for Environmental Data Analysis (CEDA). |
| Data Quality: |
Quality control checks performed at CEDA confirmed that the data meets the SNAPSI metadata requirements.
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| File Format: |
Data are Net-CDF formatted
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Related Documents
Process overview
| Title | CESM2-CAM6 model deployed at NCAR |
| Abstract | This data was produced by the CESM2-CAM6 model run by scientists at NCAR for the SNAPSI project. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- units: K
- standard_name: air_temperature
- var_id: tasmax
- long_name: 6 hourly Maximum Near-Surface Air Temperature
- units: K
- standard_name: air_temperature
- var_id: tasmin
- long_name: 6 hourly Minimum Near-Surface Air Temperature
- units: K
- standard_name: air_temperature
- var_id: ta
- long_name: Air Temperature
- units: kg m-2 s-1
- standard_name: convective_precipitation_flux
- var_id: prc
- long_name: Convective Precipitation
- units: W m-2
- standard_name: surface_downward_heat_flux_in_sea_water
- long_name: Downward Heat Flux at Sea Water Surface
- var_id: hfds
- units: m s-2
- standard_name: tendency_of_eastward_wind_due_to_orographic_gravity_wave_drag
- long_name: Eastward Acceleration Due to Orographic Gravity Wave Drag
- var_id: utendogw
- units: m s-1
- standard_name: eastward_wind
- var_id: ua
- long_name: Eastward Wind
- units: m
- standard_name: geopotential_height
- var_id: zg
- long_name: Geopotential Height
- units: kg m-2
- var_id: mrsos
- long_name: Moisture in Upper Portion of Soil Column
- standard_name: mass_content_of_water_in_soil_layer
- units: K
- standard_name: air_temperature
- var_id: tas
- long_name: Near-Surface Air Temperature
- units: m s-2
- var_id: vtendogw
- standard_name: tendency_of_northward_wind_due_to_orographic_gravity_wave_drag
- long_name: Northward Acceleration Due to Orographic Gravity Wave Drag
- units: m3 s-2
- standard_name: northward_eliassen_palm_flux_in_air
- long_name: Northward Component of the Eliassen-Palm Flux
- var_id: epfy
- units: m s-1
- standard_name: northward_wind
- var_id: va
- long_name: Northward Wind
- units: Pa s-1
- standard_name: lagrangian_tendency_of_air_pressure
- var_id: wap
- long_name: Omega (=dp/dt)
- var_id: pr
- units: kg m-2 s-1
- standard_name: precipitation_flux
- long_name: Precipitation
- units: Pa
- var_id: psl
- long_name: Sea Level Pressure
- standard_name: air_pressure_at_mean_sea_level
- units: degC
- standard_name: sea_surface_temperature
- var_id: tos
- long_name: Sea Surface Temperature
- units: %
- standard_name: sea_ice_area_fraction
- var_id: siconca
- long_name: Sea-Ice Area Percentage
- units: m
- standard_name: surface_snow_thickness
- long_name: Snow Depth
- var_id: snd
- units: 1
- standard_name: specific_humidity
- var_id: hus
- long_name: Specific Humidity
- units: Pa
- standard_name: surface_air_pressure
- var_id: ps
- long_name: Surface Air Pressure
- units: Pa
- standard_name: surface_downward_eastward_stress
- var_id: tauu
- long_name: Surface Downward Eastward Wind Stress
- units: Pa
- standard_name: surface_downward_northward_stress
- var_id: tauv
- long_name: Surface Downward Northward Wind Stress
- units: kg m-2
- standard_name: surface_snow_amount
- var_id: snw
- long_name: Surface Snow Amount
- var_id: rlut
- units: W m-2
- standard_name: toa_outgoing_longwave_flux
- long_name: TOA Outgoing Longwave Radiation
- units: K s-1
- standard_name: tendency_of_air_temperature_due_to_longwave_heating
- long_name: Tendency of Air Temperature Due to Longwave Radiative Heating
- var_id: tntrl
- units: K s-1
- standard_name: tendency_of_air_temperature_due_to_model_physics
- var_id: tntmp
- long_name: Tendency of Air Temperature Due to Model Physics
- units: K s-1
- standard_name: tendency_of_air_temperature_due_to_shortwave_heating
- long_name: Tendency of Air Temperature Due to Shortwave Radiative Heating
- var_id: tntrs
- units: m s-2
- standard_name: tendency_of_eastward_wind_due_to_eliassen_palm_flux_divergence
- long_name: Tendency of Eastward Wind Due to Eliassen-Palm Flux Divergence
- var_id: utendepfd
- units: m s-2
- var_id: utendmp
- standard_name: tendency_of_eastward_wind_due_to_model_physics
- long_name: Tendency of Eastward Wind Due to Model Physics
- units: m s-2
- var_id: utendvtem
- standard_name: tendency_of_eastward_wind_due_to_advection_by_northward_transformed_eulerian_mean_air_velocity
- long_name: Tendency of Eastward Wind Due to TEM Northward Advection and Coriolis Term
- units: m s-2
- var_id: utendwtem
- standard_name: tendency_of_eastward_wind_due_to_advection_by_upward_transformed_eulerian_mean_air_velocity
- long_name: Tendency of Eastward Wind Due to TEM Upward Advection
- units: %
- standard_name: cloud_area_fraction
- var_id: clt
- long_name: Total Cloud Cover Percentage
- units: kg m-2
- long_name: Total Soil Moisture Content
- var_id: mrso
- standard_name: mass_content_of_water_in_soil
- units: m s-1
- standard_name: northward_transformed_eulerian_mean_air_velocity
- var_id: vtem
- long_name: Transformed Eulerian Mean Northward Wind
- units: m s-1
- standard_name: upward_transformed_eulerian_mean_air_velocity
- var_id: wtem
- long_name: Transformed Eulerian Mean Upward Wind
- units: m3 s-2
- standard_name: upward_eliassen_palm_flux_in_air
- long_name: Upward Component of the Eliassen-Palm Flux
- var_id: epfz
- units: m
- standard_name: height
- var_id: height
- long_name: height
- var_id: time_bnds
- long_name: history time interval endpoints
- units: degrees_east
- long_name: longitude
- var_id: zlon
- units: Pa
- standard_name: air_pressure
- long_name: pressure
- var_id: plev
- long_name: time
- var_id: time
- units: days
- var_id: time_bnds
- long_name: time interval endpoints
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- long_name: latitude
- var_id: lat
Temporal Range
2018-01-25T00:00:00
2019-11-15T00:00:00
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |