Data from satellite sensors show that during the Northern Hemisphere’s growing season, the Midwest region of the United States boasts more photosynthetic activity than any other spot on Earth, according to NASA and university scientists.
They determined this by measuring the fluorescent glow that healthy plants give off when they grow. It is not visible to the human eye but can be picked up by special sensors on satellites. The press release has a lot more details.
If you click on the map, you can see the full version. While they don’t have any state boundaries, you can make out Lake Michigan. Based on that, it looks like one of the brightest areas is across central and northern Illinois – no surprise there.
NASA has posted low and high resolution satellite photos of the record-setting low-pressure system that rolled through the Midwest last week. They say:
The storm that swept across the center of the United States on October 26 and October 27, 2010, was memorable to those who experienced it because of its strong winds, rain, hail, and widespread tornadoes. Meteorologists get excited about the storm because it set a record for the lowest pressure (not associated with a hurricane) measured over land in the continental United States. At 5:13 p.m. CDT, the weather station in Bigfork, Minnesota recorded 955.2 millibars (28.21 inches of pressure). Pressure is one indicator of a storm’s strength, and this measurement corresponds to the pressure seen in a Category 3 hurricane.
You can read the full story and see the images here.