Hydrology of a Scrub-Oak Woodland under Carbon Dioxide Enrichment

在过去的150年里，我们的工业社会--通过燃烧煤、石油和汽油--增加了大气中二氧化碳（CO2）的含量;预计CO2的水平在未来50-100年内将继续增加。 该研究项目将确定二氧化碳的增加将如何影响植物从土壤中吸收水分的方式。 正常情况下，植物通过叶子上的小孔吸收二氧化碳，但在这个过程中，它们会向大气中流失水分。 当大气中的二氧化碳含量增加时，植物会通过关闭这些孔隙来做出反应，减少水分流失，并减少植物从土壤中吸收的水量。然而，对土壤中水循环的影响尚不清楚。 这项研究将确定增加二氧化碳是否会影响植物从土壤中吸收的水量，植物吸收水分的土壤深度，以及这些变化对其他土壤水循环的影响。

ABSTRACTHungate98-73715Hydrology of Scrub-Oak Woodland Under Carbon Dioxide EnrichmentOver the past 150 years, our industrial society - by burning coal, oil, and gasoline - has increased the amount of carbon dioxide (CO2) in the atmosphere; CO2 levels are predicted to continue to increase in the next 50-100 years. This research project will determine how this increase in CO2 will affect the way plants take up water from the soil. Normally, plants take in CO2 through small pores on their leaves, but in the process they lose water to the atmosphere. When the amount of CO2 increases in the atmosphere, plants respond by closing these pores, reducing the amount of water lost, and reducing amount of water plants take up from the soil. However, the consequences for water cycling in soil are unknown. This research will determine whether increasing CO2 affects the amount of water plants take up from the soil, the depth in the soil at which plants take up water, and the consequences of these changes for other soil water cycling.