Differences between N and S Hemisphere (compiled from various sources)

[text to be improved shortly]

Astronomical

• 4-5 days longer winter season due to elliptical orbit aphelion coincidence with NHsummer
• Hence, average day length is <minute longer
• Elliptical perihelion coincidence with SH summer
• Hence SH is 5 million kms closer to sun and receives 5% greater radiation
• SH can see magellanic clouds each night
• SH can see into galactic centre hence more and brighter stars with less light pollution
• NH better for deeps space observation (no galactic pollution)
• Can see Andromeda in NH closest neighbour galaxy
• SH an see Alpha Centuri closest star

Geological

• SH Cr-Ni-PGE-Au-Fe-U deposits >> population requires
• Oldest mineral SH
• Oldest rock NH

Geographical

• greater land area (and less sea area) in the NH (and probably more forests, agriculture, lakes etc.)
• ocean currents circle the earth at high latitudes in the SH but not in the NH
• polar regions of the SH are colder than the polar regions in the NH
• NH has land areas which are further from the oceans along the same line of latitude - i.e. east-west distance to the sea is greater.
• Presence of Antarctica in SH (= highest, driest, coldest, windiest continent)
• Antarctic ozone hole bigger
• UV penetration greater in SH therefore more genetic mutations
• Clockwise coriolis effect in SH

Biological

• SH Penguins
• NH Polar bears
• SH Greatest rainforest
• SH eucalyptus
• NH pine
• NH More vegetation

Human

• NH has a greater population and this means more large cities
• the use of energy (for heating, transport, power etc.) is greater in the NH and that means more "man-made" heat is released to the atmosphere
• carbon dioxide emissions in the NH are greater
• greater atmospheric pollution occurs in the NH
• Countries which are rapidly becoming industrialised - and increasing atmospheric emissions - such as China and India are located in the NH.