Satellietfoto's

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Op dinsdag 19 mei 2009 10:30 schreef -CRASH- het volgende:
Vanuit de Shuttle Atlantis STS-125

11 mei
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15 mei
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topfoto's

A low-pressure weather system over the heart of South America developed into an unusual cyclonic storm in mid-May 2009. According to MetSul meteorologist Luiz Fernando Nachtigall (who tipped The Earth Observatory with this story), the storm “remained quasi-stationary for 48 hours and was incredibly symmetric, resembling a tropical cyclone in the middle of the continent.”
This image from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite shows the unusual storm on May 22. With clear skies all around, the ball of clouds hung over the border between Argentina and Paraguay. Near the top center of the storm, the clouds have a boiling appearance that is often associated with towering thunderstorms. Near the bottom of the storm, a few wispy streamers of clouds suggest the clockwise inward spiral of the storm.
Nachtigall wrote that “any kind of cyclonic formation is very rare in the Chaco region of northern Argentina and Paraguay. This system...unleashed heavy rain (over 200 mm) in Paraguay and displaced 500 people, according to local media reports.”

Peacock-hued splashes of color brightened the Bering Sea off the Alaskan coast on October 8, 2009, as the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite flew overhead. This true-color image shows streaks running roughly northwest-southeast, north and east of Alaska’s St. Paul Island. A close look at the bright areas reveals that they vary in color, and have uneven, swirling edges.
The color likely results in part from blooms of phytoplankton—tiny, plant-like marine organisms that thrive in cold water rich in nutrients. Like their terrestrial plant cousins, phytoplankton convert sunlight to energy, and the green chlorophyll that facilitates photosynthesis, combined with the blue of the sea water, often creates a brilliant blue-green.
The jewel tones in the Bering Sea may also result from suspended particulate matter that scatters light in the water column, especially in the patches of lightest color. Calcite plating of coccolithophores—single-celled, plant-like marine organisms—could comprise some of the light-scattering material.

Spring Bloom in New Zealand Waters




Off the east coast of New Zealand, cold rivers of water that have branched off from the Antarctic Circumpolar Current flow north past the South Island and converge with warmer waters flowing south past the North Island. The surface waters of this meeting place are New Zealand's most biologically productive. This image of the area on October 25, 2009, from the MODIS sensor on NASA’s Aqua satellite shows the basis for that productivity: large blooms of plantlike organisms called phytoplankton.
Phytoplankton use chlorophyll and other pigments to absorb sunlight for photosynthesis, and when they grow in large numbers, they change the way the ocean surface reflects sunlight. Caught up in eddies and currents, the blooms create intricate patterns of blues and greens that spread across thousands of square kilometers of the sea surface.
Especially bright blue areas may indicate the presence of phytoplankton called coccolithophores, which are coated with calcium-carbonate (chalk) scales that are very reflective. The duller greenish-brown areas of the bloom may be diatoms, which have a silica-based covering.
In addition to their importance as the foundation of the ocean food web, phytoplankton play a key role in the climate because, like plants on land, they absorb carbon dioxide from the atmosphere. When they die, they sink to the ocean floor where the carbon they took from the atmosphere is stored for thousands of years.

Depressie van vandaag met veel regen en wind.







[ Bericht 17% gewijzigd door #ANONIEM op 01-11-2009 16:32:27 ]

Mist boven het noorden van Nederland

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Waarschuwing
MIST
In het noorden en noordoosten komt dichte mist voor. De mist breidt zich de komende uren langzaam zuidwestwaarts uit.
zondag 08 november 2009 15.08 uur

Nederland bedekt met een laag sneeuw.