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VIEWS Annual Summary

The Annual Summary section of the VIEWS web site provides access to data products described in the VIEWS scope of work.  It also provides browsing capabilities of the IMPROVE aerosol database using graphical interfaces.

On 2/10/2005 the Annual Summary was updated with annual statistics through 2003. These annual data aggregations for the 20% best and 20% worst visibility days represent the finalized calculation procedures as specified in Guidance documents for the Regional Haze Rule.  Daily IMPROVE data through December 2003 are also available in this new posting of the Annual Summary.

New Features:
Visibility Grid - A new Annual Summary section displays a color coded grid showing the best and worst 20% sampling days by deciview.  Users can select sites and date ranges to modify the grid output.  Results can be output to a csv formatted file.
IMPROVE Regional Haze (IRHR) Info Panel - Descriptions of the calculation methods for Regional Haze IMPROVE Aerosol datasets are contained on the IRHR Info panel.
Timeline Status Bar - The daily timeline plot on the composition page now includes a daily sample status bar.  Located at the top of the timeline, the status bar indicates whether a daily sample is valid, contains substituted values, or is missing some or all of the aerosol components required to calculate aerosol extinction.  Daily samples missing some or all of the aerosol extinction components do not participate in the best and worst 20% groupings.  Sampling days excluded from the groupings but with some valid components are readily discernable from the status bar.
 
  Spatial and Seasonal Patterns
Map displays contours of selected parameter values. Choose annual time period to display seasonal or averages or group averages (group averages for annual data only). Groups are sorted by aerosol extinction. Select map icon to display data and statistics for a given monitoring location.
  Composition
Click on a map icon to view data for a respective site.  Data can be selected for the worst 20% days or best 20% days in a calendar year based on the selected sort variable.  The timeline below shows the date and magnitude of the sort parameter for each day, with either best or worst 20% days highlighted in red.  The pie chart shows the average composition for the selected days.  If an individual day is selected by clicking on the daily bar, that day will be highlighted in blue and the pie chart will show the composition for that day.
  Trends
Click on a map icon to view trend data for a selected parameter at that site.  Annual data aggregations can be selected by calculated aerosol extinction percentile group and averaging period (either Annual averages or 5-year rolling averages).  The Timeline plot has two modes, 'Single' and 'Multi'.  In Single mode the timeline will display your most recent selection.  In Multi mode each additional selection adds another timeline to the display.  Up to 4 timelines can be superimposed in 'Multi' mode.  To remove multiple plots from the view, select Single mode and your most recent selection is displayed.
  Back Trajectories
Back trajectories from ATAD. Click on a icon to show trajectories ending at a selected site.  Timeline shows best and worst 20% sampling days by aerosol extinction, reconstructed fine mass or reconstructed total mass. Click on a day from the timeline to select trajectory arrival day.
  Visibility Grid
Color coded tabular display of the best and worst 20% sampling days by deciview.