干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地春、夏季CO

Arid

	塔克拉玛干沙漠腹地春、夏季CO_2通量特征
其他题名	CO_2 flux characteristics of Taklimakan Desert in spring and summer
	陈慧 1; 缪启龙 1; 买买提艾力·买买提依明 2; 何清 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2015
卷号	38 期号:3 页码:487-493
中文摘要	利用世界上唯一深入流动沙漠腹地200km以上的塔克拉玛干沙漠塔中站所采集的2011年4月、7月的气象资料,分析了塔克拉玛干沙漠腹地春、夏季CO_2通量的变化特征及影响因素。结果表明:塔克拉玛干沙漠腹地CO_2通量表现为白昼地表吸收CO_2,夜间地表排放CO_2,且地表吸收强度明显大于地表排放;塔克拉玛干沙漠腹地春、夏季CO_2平均净吸收速率分别为0.93mumol·m~2·s~(-1)和0.82mumol·m~2·s~(-1);CO_2通量受大气稳定性影响较大,稳定大气条件利于沙漠地表CO_2的释放,不稳定大气条件有利于沙漠地表CO_2的吸收;此外,地表温度、土壤湿度、风速均与CO_2通量呈不同程度的负相关关系。
英文摘要	To make it clear that whether desert is somewhat a sink of carbon or a source of carbon,CO_2 flux was measured in April and July of 2011 in Taklimakan Desert,the biggest desert in China and the world’s second-largest flow desert that just smaller than Sahara Desert in Africa. This paper analyzed the CO_2 flux variation characteristics and impact factors of Taklimakan Desert in spring and summer in 2011. The pulse data are measured by OPEC open eddy detection system,the gradient data are measured by 10-meters observation tower,and the meteorological data are collected by Tazhong Station,which is the only meteorological station deep over 200 km in drifting desert in the world. It is worth pointing out that the instruments are installed in sand surface in order to exclude the influence of green plants. The conclusion shows that Taklimakan Desert is sink of carbon and CO_2 absorption rate is affected by multiple factors. The results are as follows: CO_2 is absorbed during the day and released at night in hinterland of Taklimakan Desert and CO_2 absorption is significantly greater than release. Absorption peak appears at noon time. CO_2 flux direction changes from absorption to release at sunset and release to absorption at sunrise. The average net absorption of spring and summer is about 0.93 mumol·m~2·s~(-1) and 0.82 mumol·m~2·s~(-1) respectively. CO_2 flux shows different degrees of negative correlation with land surface temperature,soil moisture and wind speed. That is to say the absorption of CO_2 increases with the increasing temperature,moisture and wind speed. It is reported that CaO which can chemically react with CO_2 in the sand of hinterland of Taklimakan desert is much more than that in the marginal area. Soil temperature and moisture may affect the reaction rate. When the wind speed increases,vertical turbulent transport of the surface layer increases too. This may be the reason why CO_2 flux changes with wind speed. CO_2 flux is influenced by atmospheric stability. Negative CO_2 flux is concentrated in the range of Z/L<0. Conversely,positive value is concentrated in Z/L>0. But whether positive or negative,all CO_2 flux date is concentrated in the range of \|Z/L\|<0.5. In other words,stable atmospheric conditions are conducive to the release of CO_2 and unstable atmospheric conditions are conducive to the absorption.
中文关键词	塔克拉玛干沙漠 ; 春、夏季 ; CO_2通量 ; 影响因子
英文关键词	Taklimakan Desert spring and summer CO_2 flux influencing factor
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5446650
来源机构	中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232654
作者单位	1.南京信息工程大学, 农业气象重点实验室, 南京, 江苏 210044, 中国; 2.乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国
推荐引用方式 GB/T 7714	陈慧,缪启龙,买买提艾力·买买提依明,等. 塔克拉玛干沙漠腹地春、夏季CO_2通量特征[J]. 中国气象局乌鲁木齐沙漠气象研究所,2015,38(3):487-493.
APA	陈慧,缪启龙,买买提艾力·买买提依明,&何清.(2015).塔克拉玛干沙漠腹地春、夏季CO_2通量特征.干旱区地理,38(3),487-493.
MLA	陈慧,et al."塔克拉玛干沙漠腹地春、夏季CO_2通量特征".干旱区地理 38.3(2015):487-493.