干旱区生态环境知识资源中心(Arid): 腾格里沙漠民勤实验点夏季沙丘CO2浓度变化

Arid

	腾格里沙漠民勤实验点夏季沙丘CO2浓度变化
其他题名	Study on the Change of Dune CO2 Concentration in Summer at Minqin in Tengger Desert
	赵景波 1; 邵天杰 2; 郁科科 2; 李恩菊 2; 成爱芳 2; 孟静静 2; 董治宝2
来源期刊	地理科学进展
ISSN	1007-6301
出版年	2010
卷号	29 期号:11 页码:1368-1374
中文摘要	为查明腾格里沙漠沙丘CO2浓度和昼夜变化规律,利用红外CO2监测仪在2009年夏季对腾格里沙漠西南部的民勤沙丘CO2浓度变化进行了昼夜连续观测,研究了不同类型,不同深度沙丘CO2浓度变化.研究得出:所有实验点CO2浓度在深度上的变化与通常观测的不同,2m和4m处的CO2浓度都比1m处的大;固定沙丘的昼夜CO2浓度累积值大于半固定沙丘的昼夜CO2浓度累积值,而半固定沙丘的昼夜CO2浓度累积值又大于流动沙丘的昼夜CO2浓度累积值;沙丘白天CO2浓度累积值高于夜间;在极端干旱的腾格里沙漠西南部,不论是固定沙丘,半固定沙丘还是流动沙丘,CO2浓度在一昼夜内也具有清楚的变化规律,即从当日09:00左右到次日09:00点左右均呈现由低到高再到低的变化,但CO2浓度升降相对于大气温度的升降具有一定的滞后性,滞后时间约1~3h;沙丘CO2浓度和大气温度之间存在显著的正相关关系,温度是决定CO2昼夜浓度变化规律的主要因素.在极端干旱的民勤沙漠区,各类沙丘沙层中的CO2浓度都明显高于空气CO2浓度
英文摘要	We have measured the diurnal changes of dune CO 2 concentration under different depth by using the infrared monitoring instruments in Minqin County in 2009, and combined the results with simultaneous temperature data. The results show that the CO 2 concentration of-2 m and-4 m always greater than that of-1 m.The diurnal CO 2 cumulative concentration from this research can be ranked as fixed dunes>semi-fixed dune>mov-ing dune. The CO 2 cumulative concentration is greater at daytime than at nighttime. For fixed, semi-fixed and moving sand dunes, the CO 2 concentration has a changing law of "low to high and then to low" from the morning to the next morning, which is basically the same as the change of temperature, but the change of the former is later than that of the latter. There is a significant positive correlation between the CO 2 concentration of dunes and atmospheric temperature, and temperature is the main factor determining the changing law of the dune CO 2 concentration. In addition, the diurnal concentration of CO 2 can be changed due to the difference in soil conditions, such as soil moisture, light and wind speed. So,it is of great significance to conduct research into the cause of global warming and the impacts of destruction of vegetation on atmospheric CO 2, which can help to find out the changing law of dune CO 2 concentration in 24 hours
中文关键词	腾格里沙漠 ; 沙丘CO2浓度 ; 昼夜变化规律 ; CO2深度变化 ; CO2释放 ; 影响因素
英文关键词	Tengger Desert dune CO 2 concentration the law of diurnal change the change of CO 2 concentration at different depths CO 2 release influencing factors
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOGRAPHY
WOS研究方向	Geography
CSCD记录号	CSCD:4051265
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224799
作者单位	1.陕西师范大学旅游与环境学院, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710062, 中国; 2.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国
推荐引用方式 GB/T 7714	赵景波,邵天杰,郁科科,等. 腾格里沙漠民勤实验点夏季沙丘CO2浓度变化[J]. 陕西师范大学,2010,29(11):1368-1374.
APA	赵景波.,邵天杰.,郁科科.,李恩菊.,成爱芳.,...&董治宝.(2010).腾格里沙漠民勤实验点夏季沙丘CO2浓度变化.地理科学进展,29(11),1368-1374.
MLA	赵景波,et al."腾格里沙漠民勤实验点夏季沙丘CO2浓度变化".地理科学进展 29.11(2010):1368-1374.