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VIEWS Dataset Index
This page provides descriptions and links to the datasets available from VIEWS. These datasets include the air quality data in the VIEWS integrated database, IMPROVE archived datasets and the datasets submitted by various organizations to the VIEWS data repository which are located on the VIEWS ftp site. Questions concerning access to or submission of datasets to the repository can be sent to the VIEWS team via the Contact Us page. |
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IMPROVE Data Archives |
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Organization: Interagency Monitoring of Protected Visual Environments; |
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Metadata: Metadata Browser |
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Description: A link to a page with annual archives of the raw IMPROVE aerosol data set. The IMPROVE data are under constant analysis and occasionally errors in the database or new ways to process the data are found. Once a year, usually in January, existing data are updated fixing known errors and updating values with reprocessed data. Prior to making these changes the dataset is archived and changes to the historical data from previous archives is noted.
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Time Period:
1988-present |
Frequency:
every third day |
Duration:
24-hour |
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Place:
North America>United States |
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Method: Field
Measurement |
Stratum: Surface
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Parameter:
PM2.5 mass, PM2.5 elemental, ionic and carbon composition, PM10 mass |
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Availability: Online
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| Contact: Bret Schichtel - Schichtel@cira.colostate.edu
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Regional Haze Rule Haze Summary Data |
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Organization: |
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Metadata: Regional Haze Guidance Documents |
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Description: Data files containing daily, annual and five year average values of composite aerosol concentrations and light extinction and haze metrics following the calculating procedures in the regional haze guidance documents using the new and old IMPROVE light extinction algorithms. In addition, the means of the best 20% visibility days (G10), worst 20% visibility days (G90), and all visibility days (G100)for the 5 year Regional Haze Rule baseline period (2000-2004) are provided. The baseline values were calculated following the RHR guidance documents using the new IMPROVE algorithm both with and without the State supplied substituted data.
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Time Period:
varies |
Frequency:
varies |
Duration:
varies |
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Place:
North America>United States |
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Method: calculated values from measured data |
Stratum: Surface
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Parameter:
composit aerosol species concentrations and light extinction, deciview |
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Availability: Online
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| Contact: Bret Schichtel - Schichtel@cira.colostate.edu
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Natural Haze Levels II (version 2, includes substituted data) |
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Organization: Natural Haze Levels II Committee; |
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Metadata: Metadata |
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Description: This file contains the second version of the natural haze level II estimates based on the work of the Natural Haze Levels II Committee. These data fix a minor error in the first version of the natural haze level II estimates. The first version of these data did not include values for monitoring sites with less than three complete years of monitoring data. States have provided substituted data for missing data values at these sites that represent haze in class I areas. For these sites the natural haze levels are estimated using only the measured data and using measured data and substituted data values.
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Time Period:
Climatological |
Frequency:
NA |
Duration:
NA |
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Place:
North America>United States |
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Method: Calculated values |
Stratum: Surface
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Parameter: Light extinction from major aerosol components for the best and worst 20% haze days and average days |
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Availability: Online
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| Contact: Marc Pitchford
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IMPROVE Aerosol, RHR2 (New Equation), Substituted |
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Organization:
Various State Organization |
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Metadata: None |
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Description: An IMPROVE monitoring site can have missing data for various reasons, e.g. a power outage at the monitoring site. In some instances, there is enough missing data that the monitoring site fails the completeness criteria to calculate a valid haze metric for the Regional Haze Rule (RHR) baseline period (2000 - 2004). The RHR guidance documents has procedures for filling in some missing values with “patched” data; however this criteria is strict and few values are actually filled in. A number of States have developed different procedures to fill in additional missing values and submitted these data to the VIEWS database. These data are referred to as “substituted” data to differentiate them from the RHR “patched” data. Currently substituted data are available from 19 monitoring sites. These sites were selected because they either did not have the required 3 years of valid data to calculate the RHR haze metrics for the baseline period or they did not have complete data for the year 2002. The Regional Planning Organizations modeled the year 2002 and monitoring data was needed to evaluate and use the modeling results.
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Time Period:
2000-2004 |
Frequency:
every third day |
Duration:
24-hour |
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Place:
North America>United States |
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Method: Field
Measurement |
Stratum: Surface
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Parameter:
PM2.5 mass, PM2.5 elemental, ionic and carbon composition, PM10 mass |
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Availability: , VIEWS Subsitutded data pageVIEWS Query Wizard
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| Contact: Shawn McClure
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St. Louis – Midwest Supersite Aerosol Characterization Measurements
Conducted in Reserve, Kansas, 2002 |
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Organization: Air
Quality Laboratory, Washington University;
CENRAP |
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Metadata: pdf
document |
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Description: Ambient
aerosol field measurements were conducted at Reserve, KS, in Fall/Winter
2002 to provide insights into aerosol climatology in the CENRAP domain.
The monitoring platform site was next to an IMPROVE Protocol monitoring
station which commenced operations in Summer 2002. The measurement
strategy featured two intensive periods – each nominally six weeks in
duration - with a battery of semi-continuous monitors and integrated
samplers. Several of the semicontinuous monitors were also operated
during the weeks between these two intensive periods. The data set
includes all data collected during the deployment, including prior to,
between, and following the two intensive studies.
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Time Period:
2002 |
Frequency:
hourly |
Duration:
varies |
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Place:
North America>United States>Reserve Kansas |
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Method: Field
Measurement |
Stratum: Surface
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Parameter:
PM2.5 mass, speciated PM2.5 mass, sulfate ion, nitrate ion, organic
carbon, elemental carbon, absorption, relative humidity, temperature,
wind vector, mixing height |
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Availability: Online
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| Contact: Jay
Turner
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Big Bend Regional Aerosol and Visibility Observational study (BRAVO)
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Organization: NPS,
EPA, TCEQ |
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Metadata: Metadata
documents provided with each dataset. See the
BRAVO report for further description and analysis of the data |
Description: The
U.S. Environmental Protection Agency, the National Park Service, and the
Texas Commission on Environmental Quality sponsored the Big Bend
Regional Aerosol and Visibility Observational (BRAVO) Study, with
technical support provided by the Electric
Power Research Institute. The BRAVO Study involved a four-month
intensive monitoring period from July through October 1999 collecting 24
hour and semi-continuous aerosol, optical and gaseous data. The 24
hour data included speciated PM2.5 data following the IMPROVE protocol
at 37 sites throughout Texas. The study also released
perfluorocarbon tracers from four locations and monitored them
throughout Texas. |
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Time Period:
1999 |
Frequency:
hourly, daily |
Duration:
varies |
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Place:
North America>United States>Texas |
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Method: Field
Measurement |
Stratum: Surface
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Parameter:
PM2.5 mass, speciated PM2.5 mass, sulfate ion, nitrate ion, organic
carbon, elemental carbon, absorption, relative humidity, temperature,
wind vector, mixing height, perfluorocarbon tracer emissions and ambient
measurements |
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Availability: Online
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| Contact: Bret
Schichtel - Schichtel@cira.colostate.edu |
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