SH Location

Percent Change

NH Location

Percent Change

N Pole (−90˚S)

15%

Alert, Canada (82˚N)

15%

Cape Grim (−41˚S)

15%

Azores, Port (38.7˚N)

15.5%

Samoa (−14˚S)

15.8%

Mauna Loa (19.5˚N)

15.5%

Average SH

15.3%

Average NH

15.3%