The nighttime viewing capabilities of the Suomi NPP satellite are giving earth scientists new views of the planet's surface once the sun goes down.
An image taken on Sept. 27, 2012, and released recently by NASA's Earth Observatory, shows off the satellite's penetrating gaze with a view of low-level, marine layer clouds off the coast of California. These clouds are invisible to technologies previously used to view nighttime scenes.
Suomi NPP, run jointly by NASA and the National Oceanic and Atmospheric Administration, took the image with its Visible Infrared Imaging Radiometer Suite (VIIRS) "day-night band," which detects wavelengths of light from green to near-infrared. This means the satellite can spot gas flares, auroras, wildfires, city lights and reflected moonlight, according to the Earth Observatory. And add to that, low-lying clouds.
In the Suomi image, the marine layer clouds shroud the ocean along the California coast, from San Francisco to Los Angeles. You can also see the shadow of some higher-level clouds cast by moonlight onto the low clouds. Marine layer clouds are so called because they form in a sheet over the ocean as low stratus clouds. [Album: Reading the Clouds]
Here's how it works: Winds push moist surface-level air upward, causing it to expand and cool, while at the same time a coastal California feature called the Pacific High causes higher-level air to sink towards the surface, where it warms; these opposing forces create what is called an inversion layer between the surface and upper-air masses, according to the Scripps Institution of Oceanography.
While temperatures in the atmosphere typically get cooler the further up you go, the opposite happens in the inversion layer: Air is cooler toward the bottom, where the surface air is rising, and warmer toward the top of the layer, where the upper-level air is sinking.
If the air rising from the surface cools to a point at which the moisture in it condenses out below the inversion layer, marine layer clouds are formed, bounded on the top by the bottom of the inversion layer. This explains the typically uniform height of the cloud tops. The clouds are bounded on the bottom by the point at which they reach saturation and water condenses out.
These clouds can pose a hazard to ship and air travel, according to the Earth Observatory, but detecting them has been tricky in the past because of the limits of other Earth-observing satellites. Another image of the same scene taken in thermal infrared wavelengths the band of the light spectrum typically used by meteorologists to observe Earth's surface at night illustrates this.
In this image, you can only see the higher-level clouds that were casting shadows in the previous image. The marine layer clouds are too close in temperature to the ground to show up as distinct feature in these wavelengths.
Suomi's capabilities therefore give meteorologists another tool to better observe and predict Earth's weather.
Reach Andrea Thompson atathompson@techmedianetwork.com and follow her on twitter @AndreaTOAP.Follow OurAmazingPlanet on Twitter @OAPlanet. We're also on Facebook and Google+.
Image Gallery: Crazy Cloud Patterns Infographic: Earth's Atmosphere Top to Bottom In Images: Mysterious Night-Shining Clouds Copyright 2013 OurAmazingPlanet, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
Blog List
-
Kaley Cuoco Shows Off Fit Physique In Skin-Revealing Yoga Outfit - By Suzy Byrne Kaley Cuoco leaving yoga class in L.A. on Monday. (X17online.com)Kaley Cuoco gave new meaning to hot yoga on Monday when she emerged from cla...10 years ago
Pageviews
Popular Posts
-
WARSAW, Poland (AP) In Poland, speaking out in parliament is a privilege mostly reserved for lawmakers, but the opposition has skirted that ...
-
HELENA, Mont. (AP) A northwestern Montana man shot and killed the host of the Sportsman Channel show "A Rifleman's Journal" in...
-
By Kate Kelland, Health and Science Correspondent LONDON (Reuters) - More than a third of all women worldwide are victims of physical or sex...
-
By Kim Palmer CLEVELAND (Reuters) - The three Cleveland women found alive after vanishing in their own neighborhood for about a decade wer...
-
Justin Bieber is going to space, and he may even shoot a music video in the final frontier. The teen pop star is the latest celebrity to sig...
-
BlackBerry 10 One of the main concerns surrounding Research in Motion s ( RIMM ) upcoming BlackBerry 10 operating system ...
-
By Dave Warner PHILADELPHIA (Reuters) - NASCAR driver Jason Leffler died from injuries suffered when his car slammed into the wall of a dirt...
-
Environmental activist Erin Brockovich, portrayed by Julia Roberts in a 2000 movie about her fight over the pollution of a California town, ...
-
REDLANDS, Calif. (AP) After spending nearly a half-century as husband and wife, Bob and Norma Clark are finally married. The couple from Red...
-
LONDON (Reuters) - British Oscar-winning actress Kate Winslet has married for the third time, her publicist confirmed on Thursday. The 37-...