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Using Giovanni for Retrospective Analysis of Air Quality Events

Using Giovanni for Retrospective Analysis of Air Quality Events. Ana I. Prados, UMBC/JCET Ana.I.Prados@nasa.gov. What is Giovanni ?. Giovanni is a Web-based application developed by the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC).

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Using Giovanni for Retrospective Analysis of Air Quality Events

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  1. Using Giovanni for Retrospective Analysis of Air Quality Events Ana I. Prados, UMBC/JCET Ana.I.Prados@nasa.gov

  2. What is Giovanni ? • Giovanni is a Web-based application developed by the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). • Giovanni provides a simple and easy way to explore, visualize, analyze, and access vast amounts of Earth science remote sensing and model data. • Giovanni is NOT a near real time tool (data generally available within 1-3 days) • http://giovanni.gsfc.nasa.gov/

  3. Giovanni at your Finger Tips • Only a Web browser is • needed. • No need to learn data formats and programming. • No need to download large amounts of data. • Customized data and analyses can be obtained with only a few mouse clicks.

  4. AIRS MODIS 10-6 ppmv Aerosol from GOCART model MISR Parasol CloudSat CALIOP TOMS OMI MLS HIRDLS HALOE TRMM AMSR-E SeaWiFS Giovanni Data Giovanni Tools Data Inputs Particulate Matter (PM 2.5) from AIRNow Aerosol from MODIS and GOCART model Carbon Monoxide from AIRS Giovanni Instances Models and more… Ozone Hole from OMI Water Vapor from AIRS MODIS vs SeaWiFS Chlorophyll

  5. Analysis of U.S Air Quality Visualizing California’s Wildfires from Space Tropospheric NO2 UV Aerosol Index OMI OMI Cloud Optical Thickness Aerosol Small Mode Fraction MODIS MODIS Total Column CO Aerosol Mass over Land MODIS AIRS

  6. Giovanni Air Quality Datasets Particulate Air Quality (not NRT products) • PM2.5 station data - Acquired at DataFed from EPA AIRNow and then via WCS into Giovanni • MODIS TERRA and AQUA total and fine mode Aerosol Optical Depth (AOD) • MISRAOD • CALIOP Aerosol Feature Mask vertical curtain plots • OMI UV Aerosol Index • GOCART Model data – AOD speciation (2x2.5 degree) Trace Gases (not NRT products) • OMI NO2 Tropospheric column (0.25x0.25 degree) • AIRS CO and methane (profile data)

  7. Giovanni: Tools for Air Quality Applications • Temporal and geographical selection of data products - Lat/lon maps with overlay option, time series, and Hovmoller plots for customized visualization of air quality events • Combined surface monitor and satellite data - AOD/ PM2.5 scatter plots, correlation maps, time series and difference plots for analysis and source attribution of pollution events • Temporal Animation plots of air quality data products for examining long range transport of pollutants

  8. Giovanni Air Quality Data Products

  9. OMI Tropospheric NO2 Column June 22, 2007 • Sensitive in the Boundary layer • Qualitative agreement with high NOx regions (i.e urban areas) October 25th, 2007 • Note: Slightly different product than KNMI NO2 • Not a near real time product

  10. MODIS Aerosol Optical Depth • At least two daily observations - Terra and Aqua • Sensitive to Boundary Layer Industrial, smoke & dust aerosols • Well validated over land • Fine mode fraction

  11. OMI UV Aerosol Index • Mostly sensitive to absorbing aerosols above the planetary boundary layer , i.e. smoke plumes and dust

  12. Giovanni AIRNow PM2.5 Gridded Data Giovanni PM2.5 Map (ug/m3) • Giovanni PM2.5 map Data from EPA AIRNow. AIRNow PM2.5 Air Quality Index Map Note: Acquired by Giovanni from DataFed via WCS.

  13. Cloud-Aerosol Lidar and Infra-Red Pathfinder Satellite Observation (CALIPSO) 3D Visualization of Air Pollution • CALIPSO has a lidar that provides information about the vertical distribution of particles • Useful in conjunction with column AOD • Spatial resolution (vertical): 30 – 60 m • Temporal resolution: 16 days ± 20 – 50 km

  14. Giovanni A-Train: Obtaining CALIPSO KMZs for 3D-Visualization

  15. Select A-Train Instance parameter(s)

  16. Calipso in Giovanni: Vertical Distribution of Aerosols & 3D-Vis Most Giovanni data sets available in KML (Google Earth, and other tools) October 27th, 2007 OMI Aerosol Index in Background Vertical: Calipso Curtain Plot Yellow: aerosol flag Blue: cloud flag

  17. NASA GOGART Model Particle Speciation • Global chemical transport model with gas phase and aerosol chemistry • Daily and Monthly data at 2x2.5 degree resolution • Giovanni allows colocation with satellite and EPA AIRNow data • Source attribution for pollution events California and Southwestern US Eastern US Sea salt Organic CarbonDustBlack carbonSulfate

  18. NASA GOCART Model Particle Speciation Sulfate Black Carbon Organic Carbon Dust

  19. How do I acquire and generate the image visualizations ?

  20. Instance Page for Gridded data Description Spatial Selection Some instances have vertical or wavelength selection Parameter Selection Temporal Selection Visualization Selection 20

  21. Type latitude and longitude coordinates and click Update button Spatial Selection Click and drag Panning Click to select a map layer Zooming 21

  22. Select to display more product information Click to hide the parameter group Check to select a group of parameters Check to select a parameter Click to show parameter description Parameter Selection 22

  23. Temporal Selection The example shown is temporal selection for an instance featuring 3-hourly data. Dropdown menus for Date and Time selections. • Instances for monthly data have dropdown menu for Year and Month selections • Instances for daily data have dropdown menu for Year, Month, and Day selections. • Instances for hourly data have dropdown menu for Year, Month, Day, and Hour selections. 23

  24. Visualization Selection Click to select a Visualization (also referred to as Analytical Function). “Lat-Lon Map, Time-averaged” is the common default option. Click to display the description of the selected Visualization (Analytical Function). 24

  25. Giovanni Results Page • Result navigation tabs • Home • Result List • Download Data • Data Product Lineage • Acknowledgment Policy • Images • Refine Constraints • Spatial selection • Temporal selection • Graphical preferences • Submit Refinements 25

  26. Results Page – Visualization result Result Navigation Tabs Download Data Download Data 26

  27. Download multiple files Download Giovanni processed input data Group check boxes Image icons for single file download Result data KMZ files for Google Earth Results Page – Downloading data 27

  28. Results Page - Acknowledgment Policy Acknowledging the use of Giovanni is very important to us and to NASA. http://disc.sci.gsfc.nasa.gov/giovanni/Giovanni_usage_guidelines.shtml 28

  29. Examples of Giovanni capabilities for retrospective analysis of US Air Quality

  30. PM2.5, MODIS and OMI Views of California FiresOctober 2007 OMI UV Aerosol Index EPA AIRNow PM2.5(ug/m3) Level-3 MODIS AOD Oct. 24th Oct. 25th

  31. Aerosol Pollution over the Eastern US: haze, clouds or smoke ? July 7th, 2006 MODIS Terra True Color imagery Source: MODIS Rapidfire

  32. Giovanni can help: Surface monitor and satellite data – July 7th, 2006 OMI Aerosol Index Moderate PM2.5 Smoke OMI measures only absorbing aerosols (smoke or dust) AIRNow PM2.5 MODIS AOD

  33. Satellite measurements are a total column, not always correlated with PM2.5 !!! Northeast US - Smoke above the PBL - Satellite shows pollution but PM2.5 shows good air quality

  34. Surface Monitor-Satellite ComparisonsJune 15- July 15th, 2006 MODIS/PM2.5 correlation MODIS/ PM2.5 time series Satellite measurements are a total column --- not necessarily correlated with PM2.5 concentrations !!!

  35. Aerosol Pollution on July 7th: industrial (sulfate) or smoke ? GOCART Model July 7th – relatively high organic and black carbon over eastern US Organic Carbon Black carbonSulfate

  36. Aerosol Pollution over the Eastern US: GOCART Model data via Giovanni Sulfate Organic Carbon Black carbonSulfate Smoke in the Northeast, mixture of smoke and industrial aerosols over the southeast Organic Carbon

  37. But wait, how about California and the central US ? We are out of time, let’s try a hands on exercise to learn more !!

  38. Coming Soon to Giovanni…. • HTAP Model Data • Meteorological and chemical speciation data from models for examining long range transport of pollutants • Comparisons among satellite, model, and in-situ air quality data

  39. How can I learn more about Air Quality Applications of NASA Earth Science data and Giovanni ?? • Check our web site regularly at http://aerocenter.gsfc.nasa.gov/asrs to find out about more workshops in 2009 on use of NASA Earth Science data sets and tools, including Giovanni • Further info: Ana.I.Prados@nasa.gov

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