permafrost ecosystem
11Drunken trees — Not to be confused with the floss silk tree, also known as the drunken tree or palo borracho. A drunken forest in Siberia caused by melting permafrost. NASA photo. Drunken trees, tilted trees, or a drunken forest, is a stand of trees displaced… …
12Aulacomnium palustre — Taxobox image caption = regnum = Plantae divisio = Bryophyta classis = Bryopsida subclassis = Bryidae ordo = Bryales familia = Aulacomniaceae genus = Aulacomnium species = A. palustre binomial = Aulacomnium palustre binomial authority = (Hedw.)… …
13Climate Change Science Program — The Climate Change Science Program (CCSP) was the program responsible for coordinating and integrating research on global warming by U.S. government agencies from February 2002 to June 2009.[1] Toward the end of that period, CCSP issued 21… …
14Ecology — For other uses, see Ecology (disambiguation). Ecology …
15tundra — /tun dreuh, toon /, n. one of the vast, nearly level, treeless plains of the arctic regions of Europe, Asia, and North America. [1835 45; < Russ túndra < Lappish; cf. Kola Lappish tundar flat elevated area] * * * Treeless, level or rolling ground …
16Arctic Regions — ▪ 2009 The Arctic regions may be defined in physical terms (astronomical [north of the Arctic Circle, latitude 66° 30′ N], climatic [above the 10 °C (50 °F) July isotherm], or vegetational [above the northern limit of the tree line]) or in human… …
17Global warming — This article is about the change in climate Earth is currently experiencing. For general discussion of how Earth s climate can change, see Climate change …
18environment — 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… …
19Snowball Earth — The Snowball Earth hypothesis as it was originally proposedcite book author = Kirschvink, J.L. year = 1992 chapter = Late Proterozoic low latitude global glaciation: The snowball Earth title = The Proterozoic Biosphere: A Multidisciplinary Study… …
20Mackenzie River — Coordinates: 68°56′23″N 136°10′22″W / 68.93972°N 136.17278°W / 68.93972; 136.17278 …
