OMI and MODIS Aerosol Data in GIOVANNI

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OMI and MODIS Aerosol Data in GIOVANNI
Pawan Gupta1, Sundar A. Christopher1, Ana
Prados2 1UAHuntsville 2UMBC, JCET AMS Giovanni
Short Course January 11th, 2009
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Giovanni Air Quality Tools and Datasets

• Available Science Data Sets
• 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
• MISR Aerosol Optical Depth
• CALIOP Aerosol Feature Mask curtain plots
• OMI UV Aerosol Index
• GOCART Model data AOD speciation (2x2.5 degree)
• Useful Tools for Air Quality Applications
• AOD/ PM2.5 scatter plots, correlation maps, time
  series and difference plots
• AOD and PM2.5 loops for examining long range
  transport of aerosols

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Southern California Wildfires
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Southern California Wildfires
25 October 2007
MODIS on Terra1030 am
MODIS on Aqua 130 pm
Aerosol Optical Depths at 0.55 µm (550 nm- red)
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Southern California Wildfires
25 October 2007
OMI UV Aerosol Index on Aura 138 pm
MODIS on Terra 1030 am
MODIS on Aqua, 130 pm
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Southern California Wildfires
23-27 October 2007
Multi-day means smear out some spatial
features, but allow for more complete coverage
for data-sparse mapping
OMI Tropospheric NO2
OMI UV Aerosol Index
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Southern California Wildfires
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Instance Landing Page for Gridded data
Description
Spatial Selection
Some instances have vertical or wavelength
selection
Parameter Selection
Temporal Selection
Visualization Selection
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Outputs Refine/Modify
Refine constraints and edit plot preferences
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Download data files and images here
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GIOVANNI data download page HDF, NetCDF, ASCII
and KMZs
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MODIS Aerosol Optical Depth

• Almost two daily observations - Terra and Aqua
• Sensitive to Boundary Layer Industrial, smoke
  dust aerosols
• Well validated over land
• Fine mode fraction

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Air Pollution over China MODIS AOD via Giovanni
July 4th August 4th, 2008
August 5th August 25th, 2008
Beijing Summer 2007
Beijing Summer 2008
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OMI UV Aerosol Index

• Mostly sensitive to absorbing aerosols above the
  planetary boundary layer (i.e transported smoke,
  and dust plumes)

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GIOVANNI PM2.5 Gridded Data
PM2.5 data from EPA AirNow (acquired from DataFed
via WCS) provided in GIOVANNI framework as 1
degree gridded product, which makes easy to
compare with other satellite ground observation
PM2.5 Air Quality Index
Gridded GIOVANNI PM2.5 (µgm-3)
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July 31st, 2007
In Canada and the north-central US, MODIS and OMI
show thick aerosols plumes. CALIOP overpass has a
plume above the boundary layer
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CALIPSO Curtain Plots (A-Train)July 31, 2007
Smoke and Haze over the U.S
OMI contours over MODIS AOD. White lines indicate
CALIPSO overpass
Calipso provides vertical aerosol and cloud
information
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Calipso Curtain Plots July 31, 2007Industrial
Haze in Southeastern US
AIRNow PM2.5 map in background Yellow
Calipso aerosol flag Blue cloud flag
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Monitor-Satellite ComparisonsJune 15- July 15th,
2006
MODIS/PM2.5 correlation
MODIS/PM2.5 time series
Satellite data is a total column --- not
necessarily correlated with PM2.5 concentrations

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Summary
Giovanni currently provides several NASA earth
science products for visualization and
exploration of U.S air quality, including
aerosols from MODIS, OMI, and CALIPSO on the
A-Train constellation, and gridded EPA AIRNow
PM2.5 surface concentrations. Customized data
files, plots, and maps by date/range
geographical region. Easy download of KMZ data
files for 3D Visualization of US and Global Air
Quality.