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Posts Tagged ‘MODIS’

Images show Chinese air pollution from NASA satellite

Tuesday, January 15th, 2013

Mid-January 2013 air quality proved to be dangerous to the health of Beijing residents and those of many other cities in China. Authorities warned people to stay indoors as the nation faced one of the worst periods of air quality in recent history. Factories were government-ordered to scale back emissions. According to news reports, hospitals experienced more than 20 to 30 percent increase in patients complaining of respiratory issues.

According to NASA Earth Observatory, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired these natural-color images of northeastern China on January 14 (top) and January 3, 2013. The top image shows extensive haze, low clouds, and fog over the region. The brightest areas tend to be clouds or fog, which have a tinge of gray or yellow from the air pollution. Other cloud-free areas have a pall of gray and brown smog that mostly blots out the cities below. In areas where the ground is visible, some of the landscape is covered with lingering snow from storms in recent weeks. (Snow is more prominent in the January 3 image.)

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Global warming increases possibility of heat extremes

Thursday, March 29th, 2012

According to several top scientists, the March heat wave that has shattered records across a wide swath of the U.S. bears some of the hallmarks of global warming.

In email conversations, those same scientific researchers who specialize in studying the role climate change plays in influencing individual extreme events — a burgeoning field known as  “extreme event attribution” — said global warming may have made March’s soaring temperatures more likely to occur, although they add that natural variability has played a key role as well.

Areas with warmer than average temperatures are shown in red; near-normal temperatures are white; and areas that were cooler than the 2000-2011 base period are blue. Photograph: Terra/MODIS/NASA

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Alabama tornado outbreak second deadliest, according to monitoring team

Thursday, March 22nd, 2012

A monitoring team from the Marshal Space Flight Center is monitoring the disastrous tornado outbreak in Alabama on April 27, 2011, that greatly impacted the economy of the state.

This image is of ASTER NDVI for the NWS Tuscaloosa tornado swath on top of NASS CropScape data layer. The graph shows the difference in NDVI in and outside of the tornado path.

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