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Dataset

 

Flood Risk for Extreme Events (FREE): 3D-Var assimilation of insect-derived radial winds (July 2008 - June 2009)

Update Frequency: Not Planned
Latest Data Update: 2010-04-28
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2010-09-22
Download Stats: last 12 months
Dataset Size: 61 Files | 24GB
Abstract

The Exploitation of new data sources, data assimilation and ensemble techniques for storm and flood forecasting Project is a NERC Flood Risk for Extreme Events (FREE) Research Programme project (Round 1 - NE/E002137/1 - Duration January 2007 - April 2010) led by Prof AJ Illingworth, University of Reading. This project investigates possible methods of producing ensemble weather forecasts at high-resolution. These ensembles will be used with raingauge and river flow to improve methods of flood forecasting. The dataset includes radiosonde and wind profiles in England and Wales derived using Doppler radar returns from insects. The radial velocity measurements from insects were converted into VAD profiles by fitting a sinusoid to radial velocities at constant range. All measured profiles have been interpolated to the instrument location.

This dataset contains model output files from experiments assimilating radial winds from insects are also available.

Citable as:  NERC FREE Campaign participants; Rennie, S.J. (2010): Flood Risk for Extreme Events (FREE): 3D-Var assimilation of insect-derived radial winds (July 2008 - June 2009). NCAS British Atmospheric Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/d5b6ed459b0d5647898bceb238de6f63
Abbreviation: Not defined
Keywords: FREE, Wind

Details

Previous Info:
No news update for this record
Previously used record identifiers:
http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__ACTIVITY_c08665a4-c684-11df-a03c-00e081470264
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were collected using Doppler radar in England and Wales. All measured profiles have been interpolated to the instrument location.
Data and metadata files were supplied as is by the Department of Meteorology, University of Reading in 2010, to the BADC for archiving.
Data Quality:
Unknown
File Format:
Data are PP formatted

Related Documents

No documents related to this record were found.

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title Flood Risk for Extreme Events (FREE): 3D-Var assimilation of insect-derived radial winds (July 2008 - June 2009)
Abstract Radial winds from insects detected by four operational weather radars were assimilated using three-dimensional variational data assimilation (3D-Var) into a 1.5-km resolution version of the Met Office Unified Model. The Met Office’s Unified Model (nonhydrostatic) version 7.3 was used with no convective parameterization. The domain covered the southern part of England and Wales (Fig. 1). The model had a fixed horizontal resolution of 2883360 cell grid with 0.0368 spacing (approximately 1.5 km). The vertical coordinates consisted of 70 terrain-following levels that were closely spaced near the ground. The upper boundary was 40 km MSL. The initial conditions (ICs) used to initialize the runs were derived from archived output of runs from a 4-km resolution, whole U.K. version of the Unified Model.Thereafter the 1.5-km model was run with hourly assimilation cycling to produce updated analyses. The boundary conditions (BCs) used during the forecasts were supplied from the same U.K. 4-km runs.
Input Description None
Output Description None
Software Reference None
Output Description

None
  • units: m s-1
  • long_name: 10 METRE WIND U-COMP
  • units: m s-1
  • long_name: 10 METRE WIND V-COMP
  • units: s-1
  • long_name: ACCUMULATED LEAF TURNOVER RATE PFTS
  • units: m
  • long_name: BOUNDARY LAYER DEPTH AFTER TIMESTEP
  • long_name: CANOPY CAPACITY NON-ICE TILES KG/M2
  • long_name: CANOPY CONDUCTANCE AFTER TIMESTEP
  • units: m
  • long_name: CANOPY HEIGHT OF PLANT FUNC TYPES M
  • units: kg m-2
  • long_name: CANOPY WATER AFTER TIMESTEP KG/M2
  • units: kg m-2
  • long_name: CANOPY WATER ON NON-ICE TILES KG/M2
  • long_name: CLAPP-HORNBERGER B COEFFICIENT
  • long_name: CLOUD FRACTION BELOW 1000 FT ASL
  • long_name: CONV CLOUD AMOUNT AFTER TIMESTEP
  • long_name: CONV CLOUD BASE LEVEL NO. AFTER TS
  • units: kg m-2
  • long_name: CONV CLOUD LIQUID WATER PATH
  • long_name: CONV CLOUD TOP LEVEL NO. AFTER TS
  • long_name: CUMULUS-CAPPED BL INDICATOR
  • long_name: DECOUPLED SC. NOT OVER CU. INDICATOR
  • long_name: DECOUPLED SC. OVER CU. INDICATOR
  • units: K
  • long_name: DEEP SOIL TEMP AFTER TIMESTEP
  • units: K
  • long_name: DEWPOINT AT 1.5M (K)
  • units: 0-1
  • long_name: FOG FRACTION AT 1.5 M
  • long_name: FRACTIONS OF SURFACE TYPES
  • long_name: FROZEN SOIL MOISTURE FRAC AFTER TS
  • units: m
  • long_name: HALF OF (PEAK TO TROUGH HT OF OROG)
  • long_name: HIGH CLOUD AMOUNT
  • long_name: LAND MASK (LOGICAL: LAND=TRUE)
  • 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: LEAF AREA INDEX OF PLANT FUNC TYPES
  • long_name: LOW CLOUD AMOUNT
  • long_name: MEDIUM CLOUD AMOUNT
  • units: kg kg-1
  • units: m
  • long_name: OROGRAPHY (/STRAT LOWER BC)
  • long_name: OZONE **
  • units: kg kg-1
  • long_name: P* AFTER ASSIMILATION INCREMENTS
  • units: Pa
  • long_name: PRESSURE AT MEAN SEA LEVEL
  • units: 0-1
  • long_name: PROBABILITY OF VIS LESS THAN 5 KM
  • units: kg kg-1
  • long_name: QCF IN THE EXTERNAL DUMP
  • long_name: RELATIVE HUMIDITY AT 1.5M
  • units: m
  • long_name: RESIST S FOR SO4 DIS AFTER TS S/M
  • units: m
  • long_name: ROUGHNESS LENGTH AFTER TIMESTEP
  • units: m
  • long_name: ROUGHNESS LENGTH ON TILES M
  • units: kg m-2 s-1
  • long_name: SAT SOIL CONDUCTIVITY AFTER TIMESTEP
  • units: m
  • long_name: SATURATED SOIL WATER SUCTION **
  • units: m
  • long_name: SEA ICE DEPTH (MEAN OVER ICE) M
  • units: 0-1
  • long_name: SEA ICE FRACTION AFTER TIMESTEP
  • units: K
  • long_name: SEA-ICE TEMPERATURE AFTER TIMESTEP
  • long_name: SILHOUETTE OROGRAPHIC ROUGHNESS
  • units: kg m-2
  • long_name: SNOW AMOUNT AFTER TIMESTEP KG/M2
  • long_name: SNOW-FREE ALBEDO OF SOIL
  • long_name: SOIL CARBON CONTENT KG C / M2
  • units: kg m-2
  • long_name: SOIL MOISTURE CONTENT IN A LAYER
  • units: kg kg-1
  • long_name: SPECIFIC HUMIDITY AFTER TIMESTEP
  • long_name: STABLE BL INDICATOR
  • units: m
  • long_name: STANDARD DEVIATION OF OROGRAPHY
  • long_name: STRATOCUM. OVER STABLE BL INDICATOR
  • 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: cm s-1
  • long_name: SURFACE MERID CURRENT AFTER TIMESTEP
  • units: K
  • long_name: SURFACE TEMP ON SNOW-ADJSTD TILES K
  • units: K
  • long_name: SURFACE TEMPERATURE AFTER TIMESTEP
  • units: cm s-1
  • long_name: SURFACE ZONAL CURRENT AFTER TIMESTEP
  • units: K
  • long_name: TEMPERATURE AT 1.5M
  • units: J m-3 K-1
  • long_name: THERMAL CAPACITY AFTER TIMESTEP
  • units: J m-1 K-1 s-1
  • long_name: THERMAL CONDUCTIVITY AFTER TIMESTEP
  • units: K
  • long_name: THETA AFTER TIMESTEP
  • units: K
  • long_name: TOTAL AEROSOL (FOR VISIBILITY)
  • units: micro g m-2 s-1
  • long_name: TOTAL AEROSOL EMISSIONS (FOR VIS)
  • units: 0-1
  • long_name: TOTAL CLOUD AMOUNT - RANDOM OVERLAP
  • units: 0-1
  • long_name: TOTAL CLOUD AMOUNT MAX/RANDOM OVERLP
  • units: m
  • long_name: TURBULENT MIXING HT AFTER B.LAYER m
  • units: m s-1
  • long_name: U COMPNT OF WIND AFTER TIMESTEP
  • units: m s-1
  • long_name: U COMPNT OF WIND ON PRESSURE LEVELS
  • long_name: UNFROZEN SOIL MOISTURE FRAC AFTER TS
  • units: m s-1
  • long_name: V COMPNT OF WIND AFTER TIMESTEP
  • units: m s-1
  • long_name: V COMPNT OF WIND ON PRESSURE LEVELS
  • units: m
  • long_name: VISIBILITY AT 1.5M M
  • long_name: VOL SMC AT CRIT PT AFTER TIMESTEP
  • long_name: VOL SMC AT SATURATION AFTER TIMESTEP
  • long_name: VOL SMC AT WILTING AFTER TIMESTEP
  • units: m s-1
  • long_name: W COMP OF WIND C-P TH LEVS:VAR DUMMY
  • long_name: WELL_MIXED BL INDICATOR
  • units: N m-2
  • long_name: X-COMP OF SURF & BL WIND STRESS N/M2
  • units: N m-2
  • long_name: Y-COMP OF SURF & BL WIND STRESS N/M2

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
Coverage
Temporal Range
Start time:
2008-07-26T23:00:00
End time:
2009-06-28T23:00:00
Geographic Extent

 
61.1101°
  
-8.5649°
  
4.4195°
 
49.5310°
  
Related parties
Authors (2)
Publishers (1)
Funders (1)