...century all occurred in the last 15 years (1998 was the warmest year on record) (see Box 1.2). • Snow cover in the northern hemisphere and floating ice in the Arctic Ocean have decreased since the start of the twentieth century; Europe's Alpine glaciers have lost half their volume since...

...Arctic's perennial polar ice cap is now declining at the rate of 9 percent per decade. In addition, both the snow cover in the northern hemisphere and floating ice in the Arctic Ocean have visibly decreased. This relatively modest global warming thus far is already causing considerable damage...

...since the late 19th century. The 20th century's 10 warmest year all occurred within the last 15 years. Of these, 1998 was the warmest year on record. The...in the northern hemisphere and floating ice in the artic ocean have decreased. Globally, sea level has risen 4-10 inches over the past century. World...

...data was first recorded worldwide, the global average temperature has risen by nearly 0.5°C (0.9°F). Snow cover in the Northern Hemisphere and floating ice in the Arctic Ocean have decreased, and cold-season precipitation has increased in the high latitudes. Globally, sea level has risen 10-25...