IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Alternative TitleResponse of Heat Condition within Active Layer in Swamp Meadow on the Tibetan Plateau to Warming
刘光生; 王根绪; 白炜; 张伟
Corresponding Author王根绪
Source Publication冰川冻土
Other Abstract



Climate change is now evident in the Tibetan Plateau,with impacts on the alpine ecosystem,particularly on heat-water processes within the active layer,due to the effects on water and heat balance between the permafrost surface and the atmosphere.For this reason,the influence of global warming on heat-water processes was studied through one-year observation in three sample plots,OTC-1,OTC-2 and Control.OTC-1 and OTC-2 were open-top chambers,manipulated with the mean annual air temperature increment of 6.7 ℃ and 3.5 ℃,respectively,and Control without manipulation as a contrast.The relative humidities of OTC-1 and OTC-2 were 8.0% and 6.2%,less than that of Control.Day temperature increased sharply whereas night temperature unchanged in OTC,causing much large diurnal temperature amplitude.Warming promoted plant growth and development,resulting in a significantly higher aboveground biomass in OTC-1 and OTC-2.The beginning date of active layer freezing postponed and the beginning date of thawing occurred earlier,shortening the durations of entirely frost period and frozen days.The fully thawed period extended and the thawed days increased too.Annual mean soil temperature of OTC-1 was obviously higher than that of Control,whereas there was no significant difference between OTC-2 and Control.The main reason is the effects of OTC structure and vegetation isolation.Moreover,the total cumulative temperature under all manipulations is negative,except for that at 5 cm and 20 cm depths in OTC-1.The total cumulative temperature of OTC-1 decreased with the depth.However,the total cumulative temperature of OTC-2 and Control decreased in a shallow layer only.These results are useful to studying water-heat process and carbon emission of alpine cold ecosystem.

Keyword积温 土壤温度 热状况
Subject AreaS812.2
Indexed ByCSCD ; 北大中文核心
Funding Organization国家自然科学基金项目(40925002 ; 40730634) ; 国家重点基础研究发展计划(973计划)项目(2007CB411504)
Citation statistics
Cited Times:8[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
刘光生,王根绪,白炜,等. 青藏高原沼泽草甸活动层土壤热状况对增温的响应[J]. 冰川冻土,2012,34(3):555-562.
APA 刘光生,王根绪,白炜,&张伟.(2012).青藏高原沼泽草甸活动层土壤热状况对增温的响应.冰川冻土,34(3),555-562.
MLA 刘光生,et al."青藏高原沼泽草甸活动层土壤热状况对增温的响应".冰川冻土 34.3(2012):555-562.
Files in This Item:
File Name/Size DocType Version Access License
青藏高原沼泽草甸活动层土壤热状况对增温的(1085KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[刘光生]'s Articles
[王根绪]'s Articles
[白炜]'s Articles
Baidu academic
Similar articles in Baidu academic
[刘光生]'s Articles
[王根绪]'s Articles
[白炜]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[刘光生]'s Articles
[王根绪]'s Articles
[白炜]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 青藏高原沼泽草甸活动层土壤热状况对增温的响应_刘光生.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.