The Amazon is now said to begin in an ice-covered mountain in southern Peru called Mismi.
Large volumes of methane - a potent greenhouse gas - could be locked beneath the ice-covered regions of Antarctica, according to a new study.
For example, the bright snow- and ice-covered landscapes of Canada and Siberia during winter reflect most solar radiation straight back into space, keeping the surface cold.
Global warming may make their northern wastes more habitable and allow them to exploit oil and gas located under what is now an ice-covered Arctic Ocean.
Freeze dates are defined as the observed period when a lake or river was completely ice-covered, and break-up dates as the last ice break-up seen before the summer open-water phase.
According to the US National Snow and Ice Data Center (NSIDC), Arctic sea-ice covered 4.5 million sq km (1.7 million sq miles) at its lowest point on 12 September last year.
The Punta de Vacas gauge station is located 62 km downstream from Piloto Glacier, and the basin contains 3.0% of uncovered glacier ice and 3.7% of debris-covered ice.
Drivers in Pennsylvania were traversing ice- and snow-covered streets and highways.
But since it has been largely covered with year-round ice throughout modern history, it is the least mapped ocean.
Being so far north, much of region - some 146, 000 square km - is covered by glaciers and ice caps (a type of ice field where glaciers flow off in many directions).
It takes seven or eight hours and strong legs to hike the whole crossing, past ice-blue crater lakes, over snow-covered ridges and through windswept mountain deserts, where totara trees cling to the soft black volcanic sand.
For instance, sea ice is predicted to increasingly shrink as a result of climate change: the late-summer Arctic sea ice may vanish almost entirely by the middle of the century, triggering unprecedented maritime challenges, with an increase in shipping and oil and gas exploration in high-latitude waters previously covered in ice.
Mr and Mrs Miscellaneous (699 22nd Street, 415-970-0750), opened in 2010, lures sweet tooths with homemade ice-cream in flavours like its signature Ballpark, a mix of roasted peanuts, chocolate-covered pretzels and locally-brewed beer, Anchor Steam.
BBC: After going to the dogs, a Californian quarter heats up
One striking sequence shows Endurance buried up to her deck in ice, a tangle of rigging and splintered timbers, every surface thickly covered with hoar-frost.
应用推荐