郊外 发表于 2025-3-26 22:36:51
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Remote Ocean Outpostsd groups. Larger islands, and those closer to continents tend to host more species than smaller, more remote islands. Invasive species also have an enormous impact on the biodiversity of subantarctic islands.Fortify 发表于 2025-3-27 15:39:07
A Continent Under IceMcMurdo Dry Valleys, geological processes operate that are similar to those on Mars and other planets. Yet entire mountain ranges and one of the world’s largest volcanic provinces disappear completely under the smooth Antarctic ice sheets, and geologists need to use geophysical and remote-sensing teCondescending 发表于 2025-3-27 18:57:22
A Long Journey Southaurs to a frigid continent at the bottom of the world. Evidence of the geological processes acting on the continent is preserved in the many different types of rock in Antarctica. The rocks tell a complex tale of a continent that has experienced a wide range of climates, seen a variety of life formsanthropologist 发表于 2025-3-28 01:33:39
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An Ice-Bound Continenters 99.6 % of the continent and this immense ice cap is the single largest solid object on the surface of Earth. Antarctic snow and ice, the cryosphere, contain around 90 % of the world’s ice and around 80 % of all freshwater, which is frozen in the East and West Antarctic ice sheets and the ice cap不幸的人 发表于 2025-3-28 08:28:29
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The Southern Oceanarctica. The range of water temperatures in the Southern Ocean is large. Near Antarctica, water can be colder than .2 °C, while at the ocean’s northern limits temperatures can reach 10 °C or more. In contrast, there is a small change in salinity across the ocean, but the slight changes in temperatur