高寒冻土地区草甸草地生态系统的能量-水分平衡分析
Energy-Water Balance of Meadow Ecosystem in Cold Frozen Soil Areas
查看参考文献17篇
文摘
|
为了揭示青藏高原高寒地区土壤冻融过程对地表植被大气三者之间能量水分循环的影响, 在青藏高原风火山左冒孔流域(长江源)开展了不同植被盖度条件下冻土活动层水热状态的野外观测(在30%、 60%、 90%的草甸盖度下观测分层土壤水分及温度)和相关试验. 选取考虑了积雪、植被覆盖及枯枝落叶层对土壤冻融影响的水热盐分耦合模型SHAW为动力学约束模型, 进行参数率定及其模拟计算. 结果表明: 青藏高原地气间的能量交换主要受冻土、植被生长和地表土壤含水量的影响, 并且呈明显的季节性变化;未退化高寒草甸草地对青藏高原冻土具有明显的隔热保温作用, 可以降低冻土对气候变化的响应. 在土壤活动层冻结过程期间, 土壤水分具有向表层和深层两向分流汇聚的特征, 植被覆盖变化对水分运移通量有明显影响. |
其他语种文摘
|
In order to reveal the influence of freezing-thawing processes to surface-vegetation-atmosphere in the cold regions of the Tibetan Plateau,in-situ observation of water-energy state for different meadow coverage at frozen soil areas in the Fenghuoshan Zuomaokong Basin was developed.Water-heat coupling model SHAW was selected as dynamics restraint frame,in which the influences of snow cover,vegetation coverage and the forest flooring on the soil freezing and thawing are considered.The results,which were obtained by calibrating parameters,indicate:(1) Energy exchange of meadow ecosystem in the Tibetan Plateau are influenced mainly by the frozen soil state,vegetation and surface soil moisture content,with an obvious seasonal change;(2) Non-degenerated meadow in the cold regions have an obvious heat insulation and temperature preservation function to the plateau frozen soil,and may reduce the influence of frozen soil on the response to climate change;(3) In the processes of freezing-thawing of dynamic frozen zone,the soil water has divergence gathering characteristic to the surface layer and the in-depth,the vegetation coverage change has an obvious influence on the moisture content migration. |
来源
|
冰川冻土
,2008,30(3):398-407 【核心库】
|
关键词
|
冻土
;
土壤水分
;
寒区生态
;
陆面过程
;
SHAW模型
;
能量平衡
;
植被盖度
|
地址
|
1.
中国科学院,寒区旱区环境与工程研究所, 甘肃, 兰州, 730000
2.
兰州大学资源环境学院, 甘肃, 兰州, 730000
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1000-0240 |
学科
|
普通生物学 |
基金
|
国家973计划
;
国家自然科学基金
;
中国科学院“百人计划”项目
|
文献收藏号
|
CSCD:3311745
|
参考文献 共
17
共1页
|
1.
周兴民.
中国嵩草草甸,2001:188-206
|
被引
10
次
|
|
|
|
2.
王根绪.
江河源的生态环境变化及其综合保护研究,2001:11-107
|
被引
2
次
|
|
|
|
3.
Bubier J L. Net ecosystem productivity and its uncertainty in a diverse boreal peatland.
Journal of Geophysical Research,1999,104(22):27683-27693
|
被引
8
次
|
|
|
|
4.
McGuire A D. Environmental variation vegetation distribution carbon dynamics and water/energy exchange at high latitudes.
Journal of Vegetation Science,2002,13(3):301-314
|
被引
16
次
|
|
|
|
5.
Walker D A. Vegetation-soil-thaw-depth relationships along a low-arctic bioclimate gradient Alaska:synthesis of information from the ATLAS studies.
Permafrost and Periglacial Processes,2003,14:103-123
|
被引
21
次
|
|
|
|
6.
Walker D A. History and pattern of disturbance in Alaskan arctic terrestrial ecosystems:A hierarchical approach to analyzing landscape change.
Journal of Applied Ecology,1991,28:244-276
|
被引
7
次
|
|
|
|
7.
Jorgenson M T. Permafrost degradation and ecological changes associated with a warming in central Alaska.
Climatic Change,2001,48:551-579
|
被引
82
次
|
|
|
|
8.
Zhang Y. Land surface hydrological processes in the permafrost region of the eastern Tibetan Plateau.
Journal of Hydrology,2003,283:41-56
|
被引
7
次
|
|
|
|
9.
Liu X D. The Tibetan Plateau as amplifier of orbital-scale variability of the east Asian monsoon.
Geophysical Research Letters,2003,30(16):1839
|
被引
13
次
|
|
|
|
10.
Wang Genxu. The impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau.
Science in China. Series D, Earth Sciences (in English),2006,49(11):1156-1169
|
被引
22
次
|
|
|
|
11.
Zhao Lin. Permafrost:status,variation and impacts.
Mountain Geoecology and Sustainable Development of the Tibetan Plateau,2000:113-137
|
被引
8
次
|
|
|
|
12.
王根绪. 40a来江河源区的气候变化特征及其生态环境效应.
冰川冻土,2001,23(4):346-352
|
被引
85
次
|
|
|
|
13.
Song G. Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau.
Agricultural and Forest Meteorology,2005,129:175-185
|
被引
5
次
|
|
|
|
14.
Nassar I N. Simultaneous heat and mass transfer in soil columns exposed to freezing/thawing conditions.
Soil Science,2000,165(3):208-216
|
被引
11
次
|
|
|
|
15.
郑秀清.
水分在季节性非饱和冻融土壤中的运动,2002
|
被引
24
次
|
|
|
|
16.
Yang K. Inverse analysis of the role of soil vertical heterogeneity in controlling surface soil state and energy partition.
Journal of Geophysical Research,2005,110:08101
|
被引
2
次
|
|
|
|
17.
Fuchs M. An analysis of sensible and latent heat flow in a partially frozen unsaturated soil.
Soil Science Society of America Journal,1978,42(3):379-385
|
被引
19
次
|
|
|
|
|