accumulation of snow
111Tidewater glacier cycle — The tidewater glacier cycle is the typically centuries long behavior of tidewater glaciers that consists of recurring periods of advance alternating with rapid retreat and punctuated by periods of stability. During portions of its cycle, a… …
112North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …
113Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… …
114agricultural technology — Introduction application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …
115NEIGE — Comme nous l’apprendrait, si besoin était, l’imagerie satellitaire (d’où la National Oceanographic and Atmospheric Administration des États Unis tire des cartes de l’enneigement mondial), la neige recouvre normalement en janvier l’Europe centrale …
116Glacier National Park (U.S.) — Infobox protected area | name = Glacier National Park iucn category = II caption = locator x = 67 locator y = 17 location = Flathead County Glacier County, flagicon|Montana Montana, USA nearest city = Kalispell lat degrees = 48 lat minutes = 48… …
117Recul des glaciers depuis 1850 — Glacier de Grinnell dans le Parc national de Glacier (USA) montrant le recul depuis 1850 de 1,1 km USGS Le recul des glaciers depuis 1850, mondial et rapide, affecte : l accès à l eau douce pour l irrigation et pour l utilisation… …
118environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
119India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …
120permafrost — /perr meuh frawst , frost /, n. (in arctic or subarctic regions) perennially frozen subsoil. Also called pergelisol. [1943; PERMA(NENT) + FROST] * * * Perennially frozen earth, with a temperature below 32 °F (0 °C) continuously for two years or… …
