干旱区生态环境知识资源中心(Arid): Carbon Dioxide and Vegetation Water Use

Arid

DOI	10.2172/762782
报告编号	N/A
来源ID	OSTI_ID: 762782
	Carbon Dioxide and Vegetation Water Use
	Ball, J.T.; Peterson, A.G.; Hoylman, A.M.; Luo, Y.; Sims, D.A.; Johnson, D.W.; Coleman, J.S.; Ross, P.D.; Cheng, W.
英文摘要	Evapo-transpiration from vegetation, as well as patterns of precipitation are expected to change as the concentration of CO{sub 2} in the atmosphere continues to rise (f). Water modulates the rates of many biogeochemical processes, and it has been estimated that water directly limits plant productivity over two-thirds of the earth's land surface (2). Water quality and availability are increasingly important practical issues as demands by both agricultural and urban users continue to increase. In a recent Perspective article (3) Farquhar stated that transpiration (water loss) from terrestrial vegetation will decline by 40 to 50% as the CO{sub 2} concentration in the atmosphere approaches twice present levels. He suggested that ''the impending saving of water would be a welcome result of the rising atmospheric CO{sub 2} concentration.'' We can confirm that large reductions in transpiration are expected by terrestrial physiological ecologists. Examining 35 recent articles that discussed the issue of water use while synthesizing research on ecosystem impacts of doubling atmospheric CO{sub 2} (including reviews and crop/natural ecosystem models), we found that 31 articles suggest that reductions in water use of between 25 and 50% are to be expected.
出版年	1996
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; AVAILABILITY ; CARBON DIOXIDE ; ECOSYSTEMS ; PLANTS ; ATMOSPHERIC PRECIPITATIONS ; PRODUCTIVITY ; TRANSPIRATION ; WATER QUALITY ; WATER USE ; EVAPORATION ; ECOLOGICAL CONCENTRATION
URL	http://www.osti.gov/scitech/servlets/purl/762782
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266811
推荐引用方式 GB/T 7714	Ball, J.T.,Peterson, A.G.,Hoylman, A.M.,et al. Carbon Dioxide and Vegetation Water Use,1996.