RSIG Data Inventory
The RSIG applet and web servers are conduits for accessing data whose quality is the responsibility of those organizations that produce and maintain the data. When a new dataset is added to RSIG's complement, initial quality checks are conducted to ensure that the data which RSIG retrieves, visualizes, saves, etc. matches the data from the source files, ensuring that the integrity of the data is maitained. If a problem is noted concerning the integrity of any dataset, please contact the RSIG team. Please note that while data integrity checks have been performed by the RSIG team, not all data provided through RSIG has been independently quality assured by the EPA. Please direct all questions about data quality or related issues to the data source providers listed below.
Archived data may not be immediately available. Data availability depends on such factors as the remote host system's availability, the stability of network connections, and other issues beyond the control of EPA and this application. The RSIG application will display system messages if data is unavailable.
NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) data
- Generally available Aerosol Optical Depth (AOD), Cloud Optical Thickness (COT), ozone, pressure, temperature from 2000 onwards.
- Provider site: http://ladsweb.nascom.nasa.gov/data/availability.html
- Provider site: http://modis.gsfc.nasa.gov/
AIRNow data, via the AIRNow Gateway
- GMT hourly ozone, PM2.5 from 2003 onwards.
- Provider site: http://www.airnowgateway.org/
These data are archived at the AIRNow Gateway operated by Sonoma Technology for U.S. EPA's AIRNow Program and accessed on-demand via the DataFed web server: http://webapps.datafed.net/ogc_EPA.wsfl The following is from the AIRNow web site: "These data are not fully verified or validated and should be considered preliminary and subject to change. Data and information reported to AIRNow from federal, state, local and tribal agencies are for the express purpose of reporting and forecasting the Air Quality Index (AQI). As such, they should not be used to formulate or support regulation, trends, guidance, or any other government or public decision making. Official regulatory air quality data must be obtained from EPA's Air Quality System (AQS)."
U.S. EPA's Air Quality System (AQS)
- GMT hourly ozone and PM2.5, GMT daily average PM2.5, ozone GMT 8-hour average and maximum, temperature, relative humidity, sulfer dioxide from 1980 onward.
- Provider site: http://www.epa.gov/ttn/airs/aqsdatamart/
AQS contains data vetted by the states. RSIG accesses AQS data via the Air Quality System Data Mart database. The following information is drawn from the AQS Data Mart Web site.
The AQS Data Mart is a database containing all of the information from the AQS system. Since 2007, it has contained information from AIRNow (the real time air quality reporting system) that participating agencies allow to be shared with the public. Currently the AQS Data Mart has nearly 1.6 billion values-every measured, daily aggregate, and annual aggregate value collected and calculated by EPA since January 01, 1980.
The data in the AQS Data Mart is updated nightly, 5 times per week, from the AQS database so it is the latest available. Eventually it will bring in the real-time AIRNow data each night as well.
Historical data can change at any time. Many quality assurance review processes are made on an entire year's worth of data, so it might not be until the middle of this year until the final review and changes have been made to last year's data by a submitter. Also, historical monitoring or calculation methods may be found to be problematic and require that older data be changed. Finally, there is no "versioning" or freezing of data in the Data Mart, so if other people may need your data exactly as you have it to verify or continue your analysis, you must keep a copy of it.
AQS data takes precedence over AIRNow data. AIRNow data is removed after one year if the data is not updated by AQS.
U.S. EPA's Community Multiscale Air Quality (CMAQ) model output
- Meteorology, emissions, concentrations, depositions, derived PM2.5, derived AOD and Extinction:.
- OAQPS East and West US 12km 2002.
- OAQPS/CDC East US 12km 2003-2006.
- AQMEII 12km CONUS 2006 (restricted access).
- AMAD Northern Hemisphere 2006 (restricted access).
- Other CMAQ runs will be added as they become available for release.
- Provider site: http://www.epa.gov/ttn/scram/
NOAA/National Environmental Satellite, Data, and Information Service (NESDIS) biomass burning data
- Biomass burning 2007, PM2.5, CO, CO2, CH4, N2O, NH3, NOx, SO2, TNMHC.
- Provider site: http://www.star.nesdis.noaa.gov/star/AQ_emissions.php. Data accessed at: ftp://ftp.orbit.nesdis.noaa.gov/pub/smcd/xzhang/PM25
- Twenty-two ground stations in the US measuring Irradiance (W/m2) and UVBio "sunburn" (W/m2), 1996 through 2004-06.
- Provider site: http://www.epa.gov/uvnet/access.html
- Six ground Brewer Spectrophotometer stations in the US measuring ozone (molecules/cm3) profiles (26 points up to 51 km) in the morning and evening, since September 2006.
- Provider site: http://www.esrl.noaa.gov/gmd/grad/neubrew/
- Based on statistical modeling research in the development of fused space-time predictive surfaces for air quality, a Bayesian space-time downscaler model is used to "fuse" daily ozone (8-hr max) and fine particulate air (24-hr average) monitoring data from the National Air Monitoring Stations/State and Local Air Monitoring Stations (NAMS/SLAMS) with 12 km gridded output from the Models-3/Community Multiscale Air Quality (CMAQ) model. Daily predictions are available at the 2000 US Census Tract centroid locations over the eastern U.S. for 2001-2007.
- Metadata: http://www.epa.gov/esd/land-sci/lcb/lcb_faqsd.html
GOES GASP AOD data (Geostationary Operational Environmental Satellite Aerosol Smoke Product Aerosol Optical Depth)
- More information about GASP data can be found at: http://www.star.nesdis.noaa.gov/star/AQ_goesaod.php
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) data
- 2006-07-01 to present.
- Level-1b Backscatter and Depolarization.
- Level-2 Aerosol and Cloud: Backscatter, Extinction, Depolarization, Aerosol/Cloud Layer Fraction and Column Optical Depth (integrated to surface).
- More information about CALIPSO data can be found at: http://www-calipso.larc.nasa.gov
- Note: RSIG conservatively filters the CALIPSO data according to NASA Langley CALIPSO Team recommendations which include:
- Valid range of data - which can include slightly negative (non-physical) values required to avoid bias in any subsequent aggregation.
- Available/applicable QC flag data (only non-error bits accepted).
- Available/corresponding absolute Uncertainty data (user adjustable).
- CAD_Score (cloud-aerosol discrimination score) - a measure of the likelyhood of correctly distinguished aerosol/cloud features. (User adjustable).
- Includes Uncertainty file (if available) when saving CALIPSO data.
- Detailed information about CALIPSO data products can be found at: http://www-calipso.larc.nasa.gov/resources/calipso_users_guide/data_summaries/
- See also CAD/QC filtering at: http://www-calipso.larc.nasa.gov/resources/calipso_users_guide/data_summaries/layer/index.php#cad_score
- And Quality Summary Document: http://eosweb.larc.nasa.gov/PRODOCS/calipso/Quality_Summaries/CALIOP_L2ProfileProducts_3.01.html#ExtinctionQualitySummary
Global commercial aircraft measurements: Measurements of OZone, etc. by AIbus airCraft (MOZAIC) data
- Ozone, CO, H2O, temperature, wind, etc.: 2002-01-01 to 2006-12-31.
- Access to this data is currently restricted pending an agreement between EPA and European scientists. Website: http://mozaic.aero.obs-mip.fr/web/
EPA is working to bring additional data sets into RSIG including:
NASA AURA Ozone Monitoring Instrument (OMI) aerosol and NO2 data
- More information about OMI data can be found at: http://aura.gsfc.nasa.gov/instruments/omi.html
NASA Global Ozone Monitoring Experiment-2 (GOME-2) data
- More information about GOME-2 data to be provided by NOAA can be found at: http://www.star.nesdis.noaa.gov/star/AQ_GOME2.php
NASA MOPITT (Measure Pollution In The Troposphere) CO data: http://eosweb.larc.nasa.gov/PRODOCS/mopitt/table_mopitt.html
NASA CERES (Clouds and Earth's Radiant Energy System) data: http://ceres.larc.nasa.gov/
EPA OAQPS CMAQ data as they become available.