Impacts of surface soil organic content on the soil thermal dynamics of alpine meadows in permafrost regions: data from field observations
文献类型：期刊论文
| 作者 | Wang, Genxu1 ; Mao, Tianxu1; Chang, Juan2; Du, Jizeng1
|
| 刊名 | GEODERMA
 |
| 出版日期 | 2014-11-01 |
| 卷号 | 232页码:414-425 |
| ISSN号 | 0016-7061 |
| 关键词 | Soil organic content Soil temperature dynamics Impact Alpine meadow Permafrost |
| 通讯作者 | Wang, Genxu |
| 英文摘要 | The relationship between soil organic matter and soil temperature plays an important role in our understanding of the effect of climate change on the hydrological and carbon cycles in permafrost regions. Several studies have documented that the organic horizon thickness has profound buffering effects on soil temperature for both tundra and boreal forest ecosystems. In the present study, the alpine meadow ecosystem in the middle and low-latitude permafrost region of the Qinghai-Tibet Plateau (QTP) was selected to examine the impacts of surface soil organic matter on the thermal properties of deep soil. Based on the data obtained from more than 23 observation sites, the relationship between soil organic content and soil temperature dynamics in different seasons was determined. The findings indicate a strong positive exponential (in thawing period) and linear (in freezing period) relationship between surface soil organic content (SOC) and soil temperature dynamics in deep soil layers. The higher SOC at the surface soil layer is associated with a lower rate of soil temperature variation and a later onset time for the thaw-freeze transformation. In permafrost regions of the QTP, the greater lapse rate of soil temperature per 100 m of increased elevation resulted in more significant modification of the SOC and soil thermal relationship in alpine meadows than that in tundra and boreal ecosystems. The coupled soil organic matter, soil thermal and water relationships play an important role in the resilience of permafrost during climate changes. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Soil Science |
| 研究领域[WOS] | Agriculture |
| 关键词[WOS] | QINGHAI-TIBET PLATEAU ; INTERIOR ALASKA ; VEGETATION COVER ; CLIMATE-CHANGE ; ACTIVE LAYER ; TEMPERATURE ; MODEL ; MATTER ; CARBON ; VARIABILITY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000340315700040 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/9971]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Lanzhou Univ, Nat & Environm Coll, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Genxu,Mao, Tianxu,Chang, Juan,et al. Impacts of surface soil organic content on the soil thermal dynamics of alpine meadows in permafrost regions: data from field observations[J]. GEODERMA,2014,232:414-425. |
| APA | Wang, Genxu,Mao, Tianxu,Chang, Juan,&Du, Jizeng.(2014).Impacts of surface soil organic content on the soil thermal dynamics of alpine meadows in permafrost regions: data from field observations.GEODERMA,232,414-425. |
| MLA | Wang, Genxu,et al."Impacts of surface soil organic content on the soil thermal dynamics of alpine meadows in permafrost regions: data from field observations".GEODERMA 232(2014):414-425. |
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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