Aerosols over Houston and Galveston Bay #2659

#2659 Aerosols over Houston and Galveston Bay by JVPD
In the year 2000 Houston officially exceeded Los Angeles as the city with the worst air quality in the United States. Since then, major research has been underway to characterize the type, extent and sources of air pollutants in and around Houston. These MISR views portray Houston and Galveston Bay on September 12, 2002, and display data from three of MISR's nine cameras along with a map of retrieved aerosol optical thickness. The left-hand panel is a natural-color view from MISR's vertical-viewing(nadir) camera. The center images cover the same geographic area, from the perspectives of the 70-degree forward-viewing and 70-degree backward viewing cameras. The appearance of haze is enhanced in these oblique views, and the overall area appears significantly brighter in the oblique forward view because the atmospheric particles scatter more sunlight into the forward direction. Due to geometric parallax, clouds appear to move relative to the ground as the view angle changes. At right is a map of aerosol optical depth, a measure of the amount of aerosol present in the atmosphere and one of several key variables used to characterize their climatic and environmental influence. The extent of haze across Galveston Bay can be identified by the presence of light blue and green pixels, and places where clouds or other factors precluded a retrieval are shown in dark grey. MISR uses the changes in the atmosphere's ability to transmit light and the variation in scene brightness at different viewing angles to retrieve aerosol optical depth, and to deduce some information about particle properties, such as size, shape and composition. These data are being used as part of the Houston regional air quality study. Airborne pollution particles that contribute to the poor air quality come in part from upwind power plants and petrochemical manufacturing facilities. Over a dozen local observing stations are scattered across the area to monitor air quality.

Photo Credit: NASA/GSFC/LaRC/JPL, MISR Team [0003-0612-3120-0927] by 0003

Similar Images:

#8804 Picture of a Raywood Ash Tree by Jamie Voetsch
#13195 Picture of White Heart Shapes Over Planet Earth by Jamie Voetsch
#13203 Picture of Hands of Different Human Ethnicities Surrounding Planet Earth by Jamie Voetsch
#1412 Photo of a Satellite Image of Earth With Clouds by JVPD
#13198 Picture of Red Heart Shapes Over Planet Earth by Jamie Voetsch
#13206 Picture of a Black Barcode and Scan Laser Over Earth by Jamie Voetsch
#13205 Picture of a Blue Handprint Over Planet Earth by Jamie Voetsch
#21558 Stock Photography of a Meandering River Through a Green Landscape, Togiak NWR, Alaska by JVPD
#1411 Photo of a Hole in the Ozone Layer Over Antarctica 10/01/1998 by JVPD
#13202 Picture of a Green Barcode Over Earth by Jamie Voetsch
#8732 Picture of a Forest Fire Aftermath by JVPD
#1434 Global Sea Surface Temperature 7/1984 by JVPD
#3264 Emigrant Gap Fire by JVPD
#13201 Picture of a Green Handprint on Earth by Jamie Voetsch
#2745 Salt Ponds in San Francisco Bay by JVPD
More Environmental Photos


aerosol, aerosols over houston and galveston bay, earth science, environment, environmental, galveston bay, houston, jpl, nasa, pollution