- Critical Zone Exploration Network - CZEN
The [http://www.czen.org Critical Zone Exploration Network] (CZEN) is a network of people, sites, tools, and ideas to investigate processes within the Critical Zone. This Zone, defined to encompass all fluid, mineral, gaseous, and biotic components from the outer envelope of vegetation down to the lower limits of groundwater, supports all life on Earth. CZEN was proposed by a consortium of researchers and educators drawn from the geosciences, microbiology, ecology, soil science, and engineering (Weathering System Science Consortium, WSSC) to investigate the physical, chemical and biological processes shaping and transforming Earth’s outermost thin veneer. WSSC is now CZEN. Without a targeted initiative to understand the feedbacks controlling mass and energy exchanges, individual research efforts lack the comprehensiveness and depth needed to develop a process-level understanding of Critical Zone processes, including the response of this Zone to climatic, tectonic, and anthropogenic forcings. CZEN will provide opportunities to develop interdisciplinary approaches to address these questions:
1. How do processes in the Critical Zone control fluxes of carbon, particulates, and atmospherically reactive trace gases between the land surface and the atmosphere?
2. How do important biogeochemical processes and mechanisms at Critical Zone interfaces govern long-term sustainability of soil and water resources? 3. How do processes in the Critical Zone that nourish ecosystems change over geologic and human time scales?
4. How do weathering processes impact the establishment of the Critical Zone and how is this weathering engine perturbed by global environmental change?
The Critical Zone Exploration Network [http://www.czen.org]
Wikimedia Foundation. 2010.
Look at other dictionaries:
History of the petroleum industry in Canada (frontier exploration and development) — discoveries took place near population centres or along lines of penetration into the frontier. The first oil play, for example, was in southern Ontario. The first western natural gas discovery occurred on a Canadian Pacific Railway right of way … Wikipedia
river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium
Marine pollution — While marine pollution can be obvious, as with the marine debris shown above, it is often the pollutants that cannot be seen that cause most harm. Marine pollution occurs when harmful, or potentially harmful effects, can result from the entry… … Wikipedia
United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… … Universalium
Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… … Universalium
china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material … Universalium
China — /chuy neuh/, n. 1. People s Republic of, a country in E Asia. 1,221,591,778; 3,691,502 sq. mi. (9,560,990 sq. km). Cap.: Beijing. 2. Republic of. Also called Nationalist China. a republic consisting mainly of the island of Taiwan off the SE coast … Universalium
Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… … Universalium
literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… … Universalium