Mariana Trench The Deepest Place On Earth
Δημοσιεύτηκε στις 3 Ιουλ 2015
The
Mariana Trench or Marianas Trench is the deepest part of the world's
oceans. It is located in the western Pacific Ocean, to the east of the
Mariana Islands. The trench is about 2,550 kilometres (1,580 mi) long
but has an average width of only 69 kilometres (43 mi). It reaches a
maximum-known depth of 10,994 m (± 40 m) or 6.831 mi (36,070 ± 131 ft)
at the Challenger Deep, a small slot-shaped valley in its floor, at its
southern end, although some unrepeated measurements place the deepest
portion at 11.03 kilometres (6.85 mi).
At the bottom of the
trench the water column above exerts a pressure of 1,086 bars (15,750
psi), over 1000 times the standard atmospheric pressure at sea level. At
this pressure the density of water is increased by 4.96%, making 95
litres of water under the pressure of the Challenger Deep contain the
same mass as 100 litres at the surface. The temperature at the bottom is
1 to 4 °C.
The trench is not the part of the seafloor closest to
the center of the Earth. This is because the Earth is not a perfect
sphere; its radius is about 25 kilometres (16 mi) less at the poles than
at the equator. As a result, parts of the Arctic Ocean seabed are at
least 13 kilometres (8.1 mi) closer to the Earth's center than the
Challenger Deep seafloor.
Xenophyophores have been found in the
trench by Scripps Institution of Oceanography researchers at a record
depth of 10.6 km (6.6 mi) below the sea surface. On 17 March 2013,
researchers reported data that suggested microbial life forms thrive
within the trench.
Mariana Trench or Marianas Trench is the deepest part of the world's
oceans. It is located in the western Pacific Ocean, to the east of the
Mariana Islands. The trench is about 2,550 kilometres (1,580 mi) long
but has an average width of only 69 kilometres (43 mi). It reaches a
maximum-known depth of 10,994 m (± 40 m) or 6.831 mi (36,070 ± 131 ft)
at the Challenger Deep, a small slot-shaped valley in its floor, at its
southern end, although some unrepeated measurements place the deepest
portion at 11.03 kilometres (6.85 mi).
At the bottom of the
trench the water column above exerts a pressure of 1,086 bars (15,750
psi), over 1000 times the standard atmospheric pressure at sea level. At
this pressure the density of water is increased by 4.96%, making 95
litres of water under the pressure of the Challenger Deep contain the
same mass as 100 litres at the surface. The temperature at the bottom is
1 to 4 °C.
The trench is not the part of the seafloor closest to
the center of the Earth. This is because the Earth is not a perfect
sphere; its radius is about 25 kilometres (16 mi) less at the poles than
at the equator. As a result, parts of the Arctic Ocean seabed are at
least 13 kilometres (8.1 mi) closer to the Earth's center than the
Challenger Deep seafloor.
Xenophyophores have been found in the
trench by Scripps Institution of Oceanography researchers at a record
depth of 10.6 km (6.6 mi) below the sea surface. On 17 March 2013,
researchers reported data that suggested microbial life forms thrive
within the trench.
Κατηγορία
Άδεια
- Τυπική άδεια YouTube
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου