Measurement : Cloud fraction

Fraction of sky covered by clouds, observed directly or derived from SW irradiance.

Categories
Cloud Properties

Instruments

The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes.

  • ARM Instruments
    • IRSI : Infra-Red Sky Imager
    • MPL : Micropulse Lidar
    • SKYRAD : Sky Radiometers on Stand for Downwelling Radiation
    • TLCV : Time-Lapsed Cloud Video
    • TSI : Total Sky Imager
    • WSI : Whole Sky Imager
  • External Instruments
    • ETA : Eta Model Runs
    • ECMWFDIAG : European Centre for Medium Range Weather Forecasts Diagnostic Analyses
    • ECMWF : European Centre for Medium Range Weather Forecasts Model Data
    • GOES : Geostationary Operational Environmental Satellites
    • MOLTS : Model Output Location Time Series
    • NOAASURF : NOAA Surface Meteorology Data, collected by NWS and NCDC
    • NCEPGFS : National Centers for Environment Prediction Global Forecast System
  • Field Campaign Instruments
    • AERI-CF : AERI Cloud Fraction
    • CIR : Cloud Infrared Radiometer
    • VARANAL : Constrained Variational Analysis
    • ETA : Eta Model Runs
    • ECMWFDIAG : European Centre for Medium Range Weather Forecasts Diagnostic Analyses
    • ECMWF : European Centre for Medium Range Weather Forecasts Model Data
    • GOES : Geostationary Operational Environmental Satellites
    • HSI : Hemispheric Sky Imager
    • IRSI : Infra-Red Sky Imager
    • MIRAI : JAMSTEC Research Vessel Mirai
    • MPL : Micropulse Lidar
    • LBTM-MINNIS : Minnis Cloud Products Using LBTM Algorithm
    • VISST : Minnis Cloud Products Using Visst Algorithm
    • MSR : Multi-wavelength Scanning Radiometer
    • RONBROWN : NOAA Research Vessel Ron Brown
    • NOAASURF : NOAA Surface Meteorology Data, collected by NWS and NCDC
    • NAWX : NRC Airborne W and X Band Radar
    • ISLAND-GUEST-INSTRUMENTS : Nauru Island guest instruments
    • PARSL : PNNL's Atmospheric Remote Sensing Laboratory
    • MMCR94PSU : Penn State 94GHz MMCR
    • RADFLUXANAL : Radiative Flux Analysis
    • SWFLUXANAL : Shortwave Flux Analysis
    • TSI : Total Sky Imager
    • UAV-EGRETT : UAV-Egrett
    • WSI : Whole Sky Imager
    • WSICLOUD : Whole Sky Imager Cloud Products
    • WFOV-LIVERMORE : Wide Field of View Cameras - Livermore

Value-Added Products

  • SWFLUXANAL : Shortwave Flux Analysis (Process)
    • 15SWFANALBRS1LONG : Short Wave Flux Analysis: 15-min resolution on BRS data, Long algorithm
    • 15SWFANALSIROS1LONG : Short Wave Flux Analysis: 15-min resolution on SIROS data, Long algorithm
    • 15SWFANALSIRS1LONG : Short Wave Flux Analysis: 15-min resolution on SIRS data, Long algorithm
    • 15SWFANALSKYRAD1LONG : Short Wave Flux Analysis: 15-min resolution on SKYRAD data, Long algorithm
    • 15SWFCLDFAC1LONG : Fractional cloud cover, clear-sky and all-sky shortwave flux for each of 25 individual SGP facilities.
    • 15SWFCLDGRID1LONG : Gridded (0.25 x 0.25 lat/lon) fractional cloud cover, clear-sky and all-sky shortwave flux over the SGP site.
  • SFCCLDGRID : Surface Cloud Grid (Process)
    • 15SWFCLDFAC1LONG : Fractional cloud cover, clear-sky and all-sky shortwave flux for each of 25 individual SGP facilities.
    • 15SWFCLDGRID1LONG : Gridded (0.25 x 0.25 lat/lon) fractional cloud cover, clear-sky and all-sky shortwave flux over the SGP site.
  • ARMBE : ARM Best Estimate Data Products (Process)
  • ARSCL : Active Remotely-Sensed Cloud Locations (Process)
    • MPLCMASK1CLOTH : MPL: cloud mask using the first Clothiaux, et al algorithm
    • MPLSMASK1CLOTH : MPL: "significance" mask using the first Clothiaux, et al algorithm
  • VISST : Minnis Cloud Products Using Visst Algorithm (Process)
  • WSICLOUD : Whole Sky Imager Cloud Products (Process)
    • WSICLOUDDEN : WSI: stationary (JPEG) images based on optical density retrieval
    • WSICLOUDSPEC : WSI: stationary (JPEG) images based on spectral retrieval
    • WSICLOUDSUMMARY : WSI: cloud and aerosol info, classification summary data
    • WSICLOUDSUMMARYGIF : WSI: images (GIF) relating to cloud, aerosol summary data
    • WSIFILESUMMARY : WSI: images (GIF) and text representations of data existence

Datastreams

  • WSI : Whole Sky Imager Datastreams
    • 02WSIPARTRADJPG : WSI: stationary calibrated red or clear quicklook images (JPEG), 2-min intervals
    • 02WSIPARTRADMPG : WSI: calibrated red or clear quicklook movies (MPEG), 2-min intervals
    • 10WSIPARTRADJPG : WSI: stationary calibrated red or clear quicklook images (JPEG), 10 min intervals
    • 10WSIPARTRADMPG : WSI: calibrated red or clear quicklook movies (MPEG), 10 min intervals
  • NOAASURF : NOAA Surface Meteorology Data, collected by NWS and NCDC Datastreams
    • 60NWSSURF : National Weather Service (NWS) surface meteorology data: 60-minute averages
  • ECMWF : European Centre for Medium Range Weather Forecasts Model Data Datastreams
    • ECMWFSUPP : ECMWF: supplemental data, entire coverage
    • ECMWFSURF : ECMWF: surface measurement, entire coverage
  • ECMWFDIAG : European Centre for Medium Range Weather Forecasts Diagnostic Analyses Datastreams
    • ECMWFVAR : ECMWF: model met. and cloud variables at altitude, entire coverage, 1-hr avg
  • MOLTS : Model Output Location Time Series Datastreams
    • MOLTSEDASSFCCLASS0 : Model Output Loc. Time Ser. (MOLTS): EDAS meteor. analy., basic surface, params, stations
    • MOLTSEDASSFCCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS meteor. analy., enhanced surface, params, stations
    • MOLTSEDASSNDCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS meteor. analy., enhances soundings, params, stations
  • NCEPGFS : National Centers for Environment Prediction Global Forecast System Datastreams
    • NCEPGFSATKFLX : NCEP GFS: flux variables at Atqasuk
    • NCEPGFSATKPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures, at Atqasuk
    • NCEPGFSATKSFC : NCEP GFS: surface variables at Atqasuk
    • NCEPGFSATKSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers, at Atqasuk
    • NCEPGFSATKZPROF : NCEP GFS: vertical profiles of met quantities at standard heights, at Atqasuk
    • NCEPGFSBRWFLX : NCEP GFS: flux variables at Barrow
    • NCEPGFSBRWPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures, at Barrow
    • NCEPGFSBRWSFC : NCEP GFS: surface variables at Barrow
    • NCEPGFSBRWSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers, at Barrow
    • NCEPGFSBRWZPROF : NCEP GFS: vertical profiles of met quantities at standard heights, at Barrow
    • NCEPGFSDARFLX : NCEP GFS: flux variables at Darwin
    • NCEPGFSDARPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures, at Darwin
    • NCEPGFSDARSFC : NCEP GFS: surface variables at Darwin
    • NCEPGFSDARSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers, at Darwin
    • NCEPGFSDARZPROF : NCEP GFS: vertical profiles of met quantities at standard heights, at Darwin
    • NCEPGFSFLX : NCEP GFS: flux variables
    • NCEPGFSMANFLX : NCEP GFS: flux variables at Manus
    • NCEPGFSMANPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures, at Manus
    • NCEPGFSMANSFC : NCEP GFS: surface variables at Manus
    • NCEPGFSMANSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers, at Manus
    • NCEPGFSMANZPROF : NCEP GFS: vertical profiles of met quantities at standard heights, at Manus
    • NCEPGFSNAUFLX : NCEP GFS: surface variables at Nauru
    • NCEPGFSNAUPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures, at Nauru
    • NCEPGFSNAUSFC : NCEP GFS: flux variables at Nauru
    • NCEPGFSNAUSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers, at Nauru
    • NCEPGFSNAUZPROF : NCEP GFS: vertical profiles of met quantities at standard heights, at Nauru
    • NCEPGFSPPROF : NCEP GFS: vertical profiles of met quantities at standard pressures
    • NCEPGFSSFC : NCEP GFS: surface variables
    • NCEPGFSSPROF : NCEP GFS: vertical profiles of met quantities at sigma layers
    • NCEPGFSZPROF : NCEP GFS: vertical profiles of met quantities at standard heights
  • TLCV : Time-Lapsed Cloud Video Datastreams
    • TLCV : Time-lapse cloud video (TLCV): qual. sky images, typ. ea 4-8 sec, Quicktime movies
  • TSI : Total Sky Imager Datastreams
    • TSICLDMASK : Total Sky Imager (TSI): cloud decision images, PNG format
    • TSIMOVIE : Total Sky Imager (TSI): daily movie generated from 30-sec sky image
    • TSISKYCOVER : Total Sky Imager (TSI): fractional sky coverage
    • TSISKYIMAGE : Total Sky Imager (TSI): sky image (JPEG)