Galt's Gulch

The ship tracks and winter-over locations of Arctic discovery expeditions from 1818 to 1859
are surprisingly consistent with present sea ice climatology (contours represented by shades of
blue).The climatology shown reflects percent frequency of sea ice presence on 10 September
which is the usual date of annual ice minimum for the reference period 1971–2000 (Canadian
Ice Service,2002).On a number of occasions,expeditions came within 150 km of completing the
Northwest Passage,but even in years with unfavorable ice conditions,most ships were still able
to reach comparatively advanced positions within the Canadian archipelago.By 1859,all possible
routes comprising the Northwest Passage had been discovered.


'via Blog this'