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	阿拉善流动沙漠区沙层CO_2浓度与昼夜变化规律研究
其他题名	CO_2 CONCENTRATION AND ITS DIURNAL VARIATION IN SAND LAYER OF MOBILE SAND DUNES OF ALXA DESERT
	赵景波 1; 邵天杰 2; 周旗 1; 马延东 2; 邢闪 2; 郁科科 2; 董治宝2
来源期刊	土壤学报
ISSN	0564-3929
出版年	2011
卷号	48 期号:6 页码:1158-1165
中文摘要	利用红外CO_2监测仪，对全球最高大的巴丹吉林诺尔图湖东大沙山、沙坡头流动沙丘和民勤流动沙丘进行了19个钻孔的CO_2浓度昼夜观测。结果表明，阿拉善流动沙漠区空气中CO_2浓度较1m、2m、3m、4m、5m沙层中CO_2浓度均低，表明在植物极稀少的流动沙漠区温暖季节会向空气中释放CO_2，是大气CO_2的来源区。沙层不仅白天向空气释放CO_2，夜间也在释放CO_2。在极端干旱的阿拉善流动沙漠区沙层2m深处CO_2浓度一般较1m、3m、4m、5m的大，但也有个别例外。流动沙漠区沙层CO_2浓度的昼夜变化也具有明显的规律性，各个深度沙层CO_2浓度从早8时至次日7时均呈现由低到高再到低的变化规律。沙层CO_2浓度与昼夜温度变化呈显著正相关关系。在极端干旱的阿拉善流动沙漠区水分含量较高的沙层CO_2浓度明显高，表明沙层含水量高低是决定沙层CO_2浓度水平的主要因素。
英文摘要	In order to explore CO_2 concentration in the sand layer of the mobile sand dunes of the Alxa Desert, and its influence atmospheric CO_2 and its role in the global carbon cycling, the research team utilized infrared CO_2 monitor to observe diurnal variation of CO_2 concentrations in the 19 holes drilled in mobile sand dunes of the desert. Results show that the CO_2 concentration in the air was lower than that in the sands 1 m, 2 m, 3 m, 4 m or 5 m deep, which indicates that the mobile sand dunes with rare plants release CO_2 into the atmosphere both at night and in the daytime during the warm season, acting as CO_2 sources. In the sand layer 5 m deep in the profile, the CO_2 concentration is markedly higher than that in the air, suggesting that the potential of CO_2 release is very big. In the extremely arid part of the Alxa Desert, CO_2 concentration is usually higher in the sand layer 2 m deep than in the layers 1 m, 3 m, 4 m or 5 m deep, but with some individual exceptions. Diurnal variation of CO_2 concentration in the area follows a specific law in all the layers, showing a curve of saddle shape from 08:00 am to 07: 00 am the next day, and a significant positive relationship with the temperature in the profile. In that region, the sand layer higher in moisture content is significantly higher in CO_2 concentration, which indicates that moisture content in the sand layers is the major factor determining CO_2 concentration in the layer.
中文关键词	CO_2浓度 ; 昼夜变化规律 ; CO_2释放 ; 阿拉善 ; 沙漠区
英文关键词	CO_2 concentration Law of diurnal variation CO_2 release Alxa Desert area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4403237
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/2XILL650/227187
作者单位	1.宝鸡文理学院, 陕西省灾害监测与模拟重点实验室, 宝鸡, 陕西 721013, 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,周旗,等. 阿拉善流动沙漠区沙层CO_2浓度与昼夜变化规律研究[J]. 陕西师范大学,2011,48(6):1158-1165.
APA	赵景波.,邵天杰.,周旗.,马延东.,邢闪.,...&董治宝.(2011).阿拉善流动沙漠区沙层CO_2浓度与昼夜变化规律研究.土壤学报,48(6),1158-1165.
MLA	赵景波,et al."阿拉善流动沙漠区沙层CO_2浓度与昼夜变化规律研究".土壤学报 48.6(2011):1158-1165.