The Comparison Study of Lake Carbon Flux in Summer and Autumn at northern Grass-type Lake-Baiyangdian

摘要

The lake carbon circle is an important part of regional carbon circle research. The lake ecosystem is the important carbon storeroom in the earth, it absorbs a mass of carbon dioxide through photosynthesis, and transforms carbon dioxide to organically carbon, and then the lake has traits of abundant carbon reserves and heavy carbon density. As the especial geographical place and upper productivity, the lake has significant role in carbon circle. By now, there is clear acquaintanceship of greenhouse effect problem, especial we have qualitative and quantificational understanding of ocean carbon circle primary. But we have a little research of lake carbon circle and carbon flux. There are many lakes in China, so it is crucial meaning to study lake carbon circle. In this paper, the improved Static Chamber and Li8100 that used to monitor soil Carbon Flux are introduced. Through continuously monitoring from July to November 2010, in northern Grass-type Lake-Baiyangdian demonstration, a series of conclusion are concluded about lake Carbon Flux : the day-variation of Carbon Fluxes chenged significantly, and varying followed time and temperature, the highest Carbon Flux is consistent to the highest temperature; the rule of day-variation is similar to aforesaid the three months(except special days), but Carbon Fluxes are not same, August>October> November.