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2.
WORLDOCEAN
Theworldoceancovers70i7%ofthesurfaceoftheEarthiTheareaoftheEarth
is510i1millionkm2,theoceans360i7millionkm2,andtheland149i4millionkm2
(29i3%ofthesurfaceoftheEarth)i
ThelimitsgivenoftheAtlantic,PacificandIndianOceansexcludetheseaslying
eachofthemiThepercentageofocean’sareaintheWorld(classificationforthree
oceans)isthefollowing:thePacific-35i2%,theAtlanticcovers-20i8%,andthe
IndianOcean-14i7%iThedistributionoftheseaandlandsurfacesinparticular
latitudinalzonesisirregularandasymmetricaliTheNorthernHemisphereiscalled
thelandhemisphere,whiletheSouthernHemisphereisthemarinehemisphereiThe
basicdataoftheoceansarepresentedinTable1iHowever,intheliteratureonthe
subject,wefindotherdatabasedonthemostrecentmeasurementsi
Table1.Basicdataoftheoceans[41]
adjacentseas
Oceanwith
Atlantic
Pacific
Indian
[millionkm2]
Oceanarea
179i68
106i20
74i92
[millionkm3]
watermass
Volumeof
723i699
352i827
291i945
depth[m]
Average
4,028
3,322
3,897
Maximum
depth[m]
11,034
9,219
7,455
ThePacific,Atlantic,andIndianOceansareconsideredasthethreemajor
oceans(Figure4)i
Figure4iThegeographicaldistributionoftheworld’soceans(3oceans)
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