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The universe is all worked up
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ENVISAT | |||||||||||||||||||||||||||||||
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| The satellite envisat | |||||||||||||||||||||||||||||||
ENVISAT (Environment Satellite) is a satellite dedicated to scrolling monitoring of land resources and responsible for acquiring high-resolution images of the atmosphere, land and ice, in a wide range of spectral bands. | The solar array's dimensions 14m x 5m and can have a power of 6.6 kilowatts stored in 8-nickel cadmium batteries 40 Ah each. This study provides insight into the many changes and upheavals in progress (El Niño, the warming of the planet, the hole in the ozone ...), results of a complex between human activities and natural processes. Look behind these changes and anticipate their consequences, represents a major concern for many governments and international organizations.
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| The Caspian Sea as seen by Envisat | Category: probes and satellites | ||||||||||||||||||||||||||||||
The Caspian Sea is classified as the largest lake or the smallest sea in the world with a total area of 371 000 square kilometers. | Damavand is located at the south end on the photograph, one can see a little snow job.
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Region around the island of Samoylov | Category: probes and satellites | ||||||||||||||||||||||||||||||
| This image shows the region around Samoylov Island, located in the Lena River Delta on the coast of the Laptev Sea, Northern Siberia. The small island of Samoylov pear-shaped bottom of the image is one of the 1,500 islands of the Lena River Delta. The Delta covers an area of approximately 32 000 square kilometers and completed the long course of 4400 km, from the Lena River. It is a haven for wildlife where the Arctic tundra becomes frozen during the five summer months in moist and fertile land. This fertile land is home to many migratory birds and supports diverse populations of fish and various marine mammals. Soils are markers of the dynamics of geomorphological systems in which different levels can be distinguished in this image. The upper image is an area of tundra with numerous ponds and small lakes. The lower part is the accumulation of fluvial deposits of permafrost, dark green on the image. All terraces suffer erosion of riverbanks. | This region is the subject of investigations and observations Germano Russia regarding the biology, earth science, ecology and environmental change.
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The temperatures of the Atlantic | Category: probes and satellites | ||||||||||||||||||||||||||||||
| The oceans, with an average depth of 3700 to 3800 meters, covering 70.8% of the surface of the Earth about 361 million km2. Their total volume reached 1.37 billion km3 of water. Envisat's Advanced Along Track Scanning Radiometer (AATSR) continuously monitors the temperature of sea surface with an accuracy of few tenths of a degree. The radiometer satellite captures the infrared emission of the first millimeters of the sea This issue is related to temperature by the law of black body. We deduce the exact temperature of sea surface Satellite data are increasingly used over other temperature readings (buoys, boats, ...), because of their greater accuracy and coverage. |
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Iceland under snow in October | Category: probes and satellites | ||||||||||||||||||||||||||||||
| Envisat, the Advanced Along Track Scanning Radiometer (AATSR), shows Iceland covered by the first snow of winter 2008. Iceland (capital: Reykjavik) is located in the North Atlantic Ocean south of the Arctic Circle, is the most Western European countries. We see in this picture the largest glacier in Europe, the glacier of Vatnajökull (8 000 sq km and 900 m thick). The green border that runs along the south and west coasts of Iceland, shows the presence of phytoplankton, present only in the superficial layers of the oceans. Here he performs his photosynthesis by absorbing minerals and carbon (as CO2) and releases oxygen under the effect of light. |
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The Amazon Basin | Category: probes and satellites | ||||||||||||||||||||||||||||||
| The space satellite Envisat, the Advanced Along Track Scanning Radiometer (AATSR), shows the confluence of the Rio Negro and Solimões downstream from Manaus, Brazil in the Amazon basin. The Amazon, the longest and most powerful river in the world flows slowly between the 5th parallel north and 20th parallel south. The river originates in the Peruvian Andes in the west of Lake Titicaca and empties into the Atlantic Ocean at the equator after crossing Peru and Brazil. The Amazon is responsible for 18% of the total volume of freshwater discharged into the oceans of the world and its drainage network has more than 1 000 rivers including the Rio Negro and Solimões. The Rio Negro is named after the color of decomposed plant that carries throughout his career (black river in the photo). The Solimões carries him over 1600 km, sand, mud and silt that tint the water a yellowish color. The forest of the Amazon is the largest virgin forest in the world, it absorbs a huge amount of carbon dioxide. | The conservation of the Amazon forest is one of the biggest environmental problems of the early 21st century. The forests are gradually disappearing in the world at an alarming rate while their role is vital in the overall climate of the planet.
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The Great Lakes African Rift | Category: probes and satellites | ||||||||||||||||||||||||||||||
| Lake Victoria (top center) is the largest lake in Africa and second largest freshwater lake in the world. The waters of Lake Victoria are shared by 3 states. In Northern Uganda is located in southern Tanzania and the North East, Kenya. Bottom left is the longest freshwater lake in the world, Tanganyika (670 km long, 1470 m deep and 32 900 km2 in area). Its waters are shared by 4 states, Burundi, northern, north-eastern Tanzania, west of the Congo and the southern Zambia. North of Lake Victoria is located on Lake Kyoga, Lake Albert (160 km) is located in the upper left, Lake Edward, in Lake Albert and Lake Kivu in Lake Edward. |
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| The Aral Sea | Category: probes and satellites | ||||||||||||||||||||||||||||||
| The Aral Sea is located in Central Asia, straddling two countries, Kazakhstan and Uzbekistan. This great inland sea was folded into several separate tanks, it turned into a salt lake, narrowing steadily during the second half of the 20th century. The waters of the 2 main rivers feeding the sea, the Amu Darya in the south and the Syr Darya in the northeast, were used to irrigate the cotton plantations of the region, which has turned the Aral Sea a desert called the Desert Aralkoum. In the Aral Sea that remains in 2009 only 2 lakes, one south and one even smaller north. The withdrawal of the Aral Sea added to years of successive droughts have left ports in the ground destroying the fishing trade. The bed of the Aral Sea covers an area of about 65 000 km2, of which more than half turned into desert. The constant winds and poor vegetation cover cause intense erosion through small sand dunes of 5 to 6 km in record time. Sand storms, more frequent on the region of the Aral Sea have serious impacts on fauna and flora. | The major challenge for the 50 million people in the region, is to devote resources to a rational management of water throughout the basin.
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Typhoon Melor | Category: probes and satellites | ||||||||||||||||||||||||||||||
| Typhoon Melor seen from space, image taken by the Envisat satellite October 6, winds over the Pacific Ocean, north-western Philippines, and is about to hit Honshu, the main island of the Japanese archipelago. The wind generated by typhoon Melor reached 198 km / h. Typhoon and hurricane are storm type, tropical cyclone. A hurricane begins in the Atlantic or eastern Pacific, it is then called Hurricane. When it starts in the Western Pacific, it is called typhoon. In general, the typhoon generated winds of more violent as hurricanes. Tropical cyclones are large powerful storms and thunderstorms that form over warm tropical waters where they transfer their heat to the air. It is essential to know their strength and their path to issue warnings. | The satellite observation of Earth are there to collect his information. The instruments that allow the satellite Envisat of ESA.
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Related subject |
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 Space Telescopes | |||||||||||||||||||||||||||||||
ENVISAT evolving at an average altitude of 800 km on a nearly circular orbit inclined 98 ° to the equatorial plane. Its orbital period is 101 minutes and its orbital cycle is 35 days.
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The universe is all worked up
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| Astronomy - October 13, 2007 |
