中国科学院机构知识库网格系统: 藏北高寒草地土壤冻融循环过程及水热分布特征

藏北高寒草地土壤冻融循环过程及水热分布特征

文献类型：期刊论文


作者	鲁旭阳; 王小丹; 范继辉
刊名	山地学报
出版日期	2014
卷号	32 期号:4 页码:385-392
关键词	藏北高寒草地冻融循环水热特征土壤水方动态
其他题名	The Freezing-Thawing Processes and Soil Moisture-Energy Distribution in Permafrost Active Layer, Northern Tibet
通讯作者	鲁旭阳
中文摘要	利用活动层土壤剖面的温度、水分观测资料，系统研究了藏北高寒草地多年冻土活动层土壤的冻融过程及其水热分布特征。研究表明：1土壤剖面温度随气温发生周期性波动，具有明显的滞后效应，且随深度增加变幅减小；2土壤剖面完全冻结天数为109~123 d，日冻融循环主要发生在表层（0~10 cm）土层中，冻融过程可分为不稳定冻结期、完全冻结期、不稳定消融期、和消融期4个阶段；3受冻融作用影响，土壤含水量呈现“凹”型变化，变化趋势与土壤温度有较好的一致性；4冻融作用有利于维持藏北高寒草地土壤水分，在季节转换，生态系统碳、氮循环中具有重要作用。
英文摘要	Based on the insitu highresolution observationsoil moisture and temperature data obtained in the permafrost active layer soil profilein Xainza County, Northern Tibet, the processes of freezingthawingand distribution characteristics of soil energy and moisture on season shift were discussed. The results show that: 1) the process of soil seasonally freezingthawing strongly depended on the soil temperature, the soil temperature in active layer shows a cycle variation and lag with air temperature, and the variation range is decreased with the increase of soil depth. 2) There are 109~123 days that soil profile was completely frozen, the daily freeingthawing cycle occurs mainly in surface soil layer (0~10 cm). According to the characteristics of different periods, the freezingthawing cycle could be divided into 4 stages.3) Affected by freezingthawing cycle, the curve of unfrozen soil moisture shows “decreasingat the lowestincreasing” shape, the trend matched with the change of soil temperature. 4) The processes of freezingthawing could maintain soil moisture from restraining soil evaporation, which may play an important role in the seasonal shift, carbon and nitrogen cycle of alpine grassland ecosystem in Northern Tibet.
分类号	S153;S152
收录类别	CSCD
资助信息	国家自然科学基金（41001018）;水利部公益性行业专项（201301037）;中科院成都山地所青年百人项目
语种	中文
CSCD记录号	CSCD:5220402
公开日期	2014-10-28
源URL	[http://ir.imde.ac.cn/handle/131551/7360]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
推荐引用方式 GB/T 7714	鲁旭阳,王小丹,范继辉. 藏北高寒草地土壤冻融循环过程及水热分布特征[J]. 山地学报,2014,32(4):385-392.
APA	鲁旭阳,王小丹,&范继辉.(2014).藏北高寒草地土壤冻融循环过程及水热分布特征.山地学报,32(4),385-392.
MLA	鲁旭阳,et al."藏北高寒草地土壤冻融循环过程及水热分布特征".山地学报 32.4(2014):385-392.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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藏北高寒草地土壤冻融循环过程及水热分布特征

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