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標題: Out of the Blue: Islands Seen From Space [打印本頁]

作者: bchew    時間: 2009-12-22 09:10 AM     標題: Out of the Blue: Islands Seen From Space

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Islands are some of the most beautiful, peaceful, violent, desolate and unique places on Earth. While experiencing a tropical island
& `5 ?2 N  {' w# [! Q2 Qtvb now,tvbnow,bttvbfrom its sandy beaches, or a volcanic island from its towering peaks is wonderful, experiencing them from above can be inspiring as well.公仔箱論壇: d/ a; {) M6 k; |& C

# A9 V+ S3 Q) _) ~' G5.39.217.77We’ve collected images taken by astronauts and satellites from space of some of the most interesting islands on the planet.5.39.217.77. v8 E* ]2 Y% ]; i

. T, g5 b7 t$ p: }1 Y, Ktvb now,tvbnow,bttvbAtafu Atoll, Tokelau, Pacific Ocean5.39.217.77' e: e2 b7 w! m

1 h+ _, ^! m/ e- e7 F6 l1 O9 }tvb now,tvbnow,bttvbAround 500 people live on Atafu Atoll, mostly in a village that can be seen on the corner in the left of the image above. Atafu is just five
# ~/ r, S, q( ^6 E4 F8 x  j公仔箱論壇miles wide and is the smallest of three atolls in the Tokelau Islands, a New Zealand territory.+ f7 E( T# z6 i9 Z5 F
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Atafu is made up of coral reefs that surrounded the flanks of a volcano that has since become inactive and submerged. Like many tropical
" k+ l2 x7 f" y& k. \; Fatolls, Atafu is very low lying and vulnerable to sea-level rise. This photograph was taken by astronauts aboard the International Space Station in January.
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Onekotan Island, Russia
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An island within an island was created after a big eruption around 9,000 years ago caused the peak of Onekotan’s volcano to collapse, forming # o7 T9 P! q7 J
a caldera that subsequently filled with water. The island inside the caldera is known as Krenitzyn Peak, which is the highest point on the
4 H6 Y' @0 ~9 i5.39.217.77island at around 4,300 feet.0 v; `% n5 S3 J! R: Y7 V) o. u

8 T. Y2 {2 R  |* p4 E公仔箱論壇Onekotan is in Russia’s Kuril Islands between Japan and the tip of the Kamchatka Peninsula. The islands were formed by volcanic activity . Z0 x/ _& q! c* n7 w3 x3 [
caused by the subduction of the Pacific Plate beneath the Eurasian Plate. Subduction can also generate some of the largest earthquakes
* n! k9 K- C$ I  {/ c3 B& Ptvb now,tvbnow,bttvbon Earth, including a magnitude 9 here in 1952 which was followed a week later by Krenitzyn’s only historical eruption. This image was
& L: Y8 _% {2 A$ F/ ?% ETVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。captured by the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite on June 10, 2009.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。3 g/ F+ D' C* F9 G, n9 E/ G1 u

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( C8 g, m$ {( j, e7 w$ P8 cTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。Galapagos Islands, Pacific Oceantvb now,tvbnow,bttvb: r. j8 N; L; z" t# I. p
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The Galapagos Islands are the tops of volcanoes on the sea floor off the coast of South America along the equator. The volcanic activity
8 a/ T& ^1 D# @, U5.39.217.77that formed the islands is thought to be the result of a plume of hot mantle material rising from deep in the Earth’s interior.
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The largest island, Isla Isabela, is made of the lava flows of six gently sloped shield volcanoes. The northernmost of Isabela’s volcanoes,
- R7 X) e7 k# l9 H3 T$ htvb now,tvbnow,bttvbat the top of the image above, is Wolf Volcano, which has erupted at least nine times since 1797. This image was taken by the Landsat
  p5 v9 t; C: k+ s, @  vtvb now,tvbnow,bttvb7 satellite in 2001.5.39.217.776 X! t8 q& a2 j8 y& e% j' }- Q

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Maldives, Indian Oceantvb now,tvbnow,bttvb1 Y2 `  n, q7 g4 r

( s/ L& {+ i- s2 @) Z公仔箱論壇The Maldives comprise 1,192 small coral islands adding up to just 115 square miles of territory. About 330,00 people live on the islands, . {$ F- l7 u" E- u# }" z$ w
the average elevation of which is a little more than 3 feet. It is probably the lowest country in the world.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 ~+ N' l2 g5 q5 ]+ z: ~3 Y
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This image of the North and South Malosmadulu Atolls was taken in 2002 by the ASTER instrument aboard NASA’s Terra satellite.
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) Y3 h4 t; \5 `: E$ k5.39.217.77Henrietta Island, East Siberian Sea3 Q1 c$ u7 Y8 T# c# Q
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This glacier-covered Russian island is just 6 miles wide. Beneath the ice, the island is made up of 500-million-year-old volcanic rocks overlain by
! u# Q4 d1 y) w3 q8 Q5 |; p5.39.217.77younger sedimentary rocks. This image was taken by the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 satellite on April 30, 2009.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。& A' A& z, k0 b2 }3 C
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Eleuthera Island, Bahamastvb now,tvbnow,bttvb  `, l* f! b; U+ x( R
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The spectacular underwater formations to the west of Eleuthera Island are made of calcium carbonate sand that has been eroded off 5.39.217.77, O) e2 T8 \! {& G$ q( N3 D4 {& a
of coral reefs and deposited in dunes by ocean currents.
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This 2002 image was captured by astronauts aboard the International Space Station. Located in the middle of the Bahamas, Eleuthra Island1 i: Z) m7 {0 `" ]& G# R0 b1 v
is 110 miles long, and in places just over a mile wide. Around 8,000 people live there.
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0 T: [3 A( f, W; n5.39.217.77Augustine Volcano, Alaska8 t5 G! K$ e7 [$ x' s
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The most active volcano in Alaska’s Aleutian arc, Augustine Volcano’s biggest historical eruption occurred in 1883. It has been erupting for
! V. s6 u* {1 a: ztvb now,tvbnow,bttvb40,000 years. This image, captured by The Advanced Spaceborne Thermal Emission and Reflection Radiometer on NASA ’s Terra satellite 公仔箱論壇) Z& p  K7 m3 r% d
in April 2006, shows a steam or ash plume at the tail end of several months of explosive eruptions.0 C& _) m+ n( d) V/ q, Q% {7 n% R
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Lesser Sunda Islands, Indonesia
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- P% H' }  o; X/ v  D1 Otvb now,tvbnow,bttvbThe three largest islands in this image, and many smaller ones, make up Indonesia’s Komodo National Park which was established in 1980 to protect
1 u" q; U+ Z7 ]8 R! X8 Lthe world’s largest lizard species, Komodo dragon. The total area of the park is 230 square miles. The islands are volcanoes caused by the collision
( P. o# h5 n1 l1 O/ V! K3 zof two tectonic plates. This image was captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer on NASA’s Terra satellite in 2000.
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Hawaiian Islands, Pacific Ocean公仔箱論壇, \$ k0 d/ m: a& l( R8 J7 Z

+ @+ x: a" D1 S6 t  }! Y/ P& s公仔箱論壇The Hawaiian Islands were formed by an upwelling plume of hot mantle material, called a hotspot. As the Pacific plate moved over the hotspot, it 5.39.217.77+ M: d8 `6 b0 K$ x
formed a chain of islands that first grew larger as they actively erupted, and then slowly eroded and sank below the surface of the ocean as the tvb now,tvbnow,bttvb0 `  |: S+ s  I+ N* K
crust beneath them cooled.
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4 ]/ J3 a+ K; l: btvb now,tvbnow,bttvbToday, the hotspot is causing active volcanism on the Big Island of Hawaii. Kilauea Volcano has been erupting continuously since 1983. The rest 6 Q6 v9 g/ S. |( ^9 Q1 T
of the islands, which get older from right to left, are Maui, Kahoolawe, Lanai, Molokai, Oahu, Kauai and Niihau. This image was captured by the
- N8 `, w( M1 f2 |: k+ `TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。MODIS instrument aboard NASA’s Terra satellite.Hawaiian Islands, Pacific Ocean
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The Hawaiian Islands were formed by an upwelling plume of hot mantle material, called a hotspot. As the Pacific plate moved over the hotspot, $ r0 K5 n4 G1 S0 P" ~
it formed a chain of islands that first grew larger as they actively erupted, and then slowly eroded and sank below the surface of the ocean as * G/ h9 ~7 T( O1 P
the crust beneath them cooled.
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Today, the hotspot is causing active volcanism on the Big Island of Hawaii. Kilauea Volcano has been erupting continuously since 1983. The
3 X" n) l1 ~3 W: I2 W# ?7 s$ irest of the islands, which get older from right to left, are Maui, Kahoolawe, Lanai, Molokai, Oahu, Kauai and Niihau. This image was captured
3 g% {' i% D: v! a, ]3 iby the MODIS instrument aboard NASA’s Terra satellite.
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Alejandro Selkirk Island, South Pacific Ocean
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& ~2 m- K! ~- i4 a6 e/ ztvb now,tvbnow,bttvbThis small member of the Juan Fernandez Islands off the coast of Chile measures just under a mile across. But its 5,000 feet of elevation is high enough tvb now,tvbnow,bttvb% @+ ^7 @: n3 M$ _0 `6 ~
to reach the layer of stratocumulus clouds pictured above. The result is a type of flow known as a von Karmen vortex street. This striking, curly 2 K8 ?/ o! c8 h( ^7 Z& m+ ^
pattern of eddies can also be seen in clouds, and fluids or air moving past rounded objects such as an airplane wing. This image was taken
8 x* A( j$ o3 C$ |/ Xby the Landsat 7 satellite in 1999.公仔箱論壇3 x4 s* r4 B; G2 I/ G/ i- T
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% z. y: u& I" M0 ~6 X9 K9 d4 XTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
, @3 w( W5 L9 v8 _TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。Millennium Island, Republic of Kiribati, South Pacific Ocean
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; {5 |6 `0 {6 K- Z7 d1 z7 ptvb now,tvbnow,bttvbAlso known as Caroline Island, Millennium Island is made of coral reefs that grew around a volcano, which is now underwater, leaving behind a
$ y9 O5 m7 |- ]( l& @; }# [3 ~TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。central lagoon. The maximum elevation of the island is less than 20 feet above sea level. In the past, the island has been inhabited and mined 2 V% y2 N! Z8 M
for guano, though today there are no people and it is among the world’s most pristine tropical islands. This image was taken by astronauts 公仔箱論壇; D  a4 o( n" o/ U; b0 C4 V
aboard the International Space Station on July 1, 2009.


作者: k23bb    時間: 2009-12-23 01:06 AM

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