| United States. Congress. House. Committee on Science - 2001 - 176 pages
...river ice cover in the mid- and high latitudes of the Northern Hemisphere, over the 20th century. • There has been a widespread retreat of mountain glaciers in non-polar regions during the 20th century. • Northern Hemisphere spring and summer sea-ice extent has decreased by... | |
| William H. Calvin - 2003 - 350 pages
...river-ice cover in the mid- and highlatitudes of the Northern Hemisphere, over the twentieth century. • There has been a widespread retreat of mountain glaciers in nonpolar regions during the twentieth century. • Northern Hemisphere spring and summer sea-ice extent has decreased... | |
| V. Subramanian - 2002 - 258 pages
...river ice cover in the mid- and high-latitudes of the Northern Hemisphere, over the 20th century. • There has been a widespread retreat of mountain glaciers in non-polar regions during the 20th century. 5. Global average sea level has risen and ocean heat content has increased... | |
| United States. Congress. Senate. Committee on Commerce, Science, and Transportation - 2004 - 106 pages
..."proxy" data (and their uncertainties) from tree rings, corals, ice cores, and historical records. Other observed changes are consistent with this warming....mountain glaciers in non-polar regions. Snow cover and ice extent have decreased. The global-average sea level has risen between 4 and 8 inches, which... | |
| Daniel A. Vallero - 2006 - 596 pages
...ice cover in the mid- and high latitudes of the Northern Hemisphere, over the twentieth century. • There has been a widespread retreat of mountain glaciers in nonpolar regions during the twentieth century. • Northern Hemisphere spring and summer sea-ice extent has decreased... | |
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