Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geomorph.2005.03.011 |
Biogeomorphic model of dunefield activation and stabilization on the northern Great Plains | |
Hugenholtz, CH; Wolfe, SA | |
通讯作者 | Hugenholtz, CH |
来源期刊 | GEOMORPHOLOGY
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ISSN | 0169-555X |
EISSN | 1872-695X |
出版年 | 2005 |
卷号 | 70期号:1-2页码:53-70 |
英文摘要 | A conceptual model is proposed for the activity of sand dune systems on the northern Great Plains that incorporates vegetation growth theory and geomorphic system theory. Dunefield activity is modeled as a cyclic phenomenon, alternating between active and stable states, with the latter as the system state attractor. The model is divided into two constituent parts: an activation model and a stabilization model. The activation model is qualitative and describes the transition from stable to active dunes as the result of a climatic perturbation such as drought that decreases vegetation cover. The intensity and duration of the climatic perturbation determines the rate of decline of vegetation cover. The stabilization model is quantitative and describes the transition from active to stable dunes using a logistic model of vegetation growth. Small perturbations during stabilization can prolong the duration of recovery, enabling dunes to remain active well after the initial perturbation. Despite the geographic focus of this study, the model appears applicable to a variety of environments where dune activity is limited, in part, by vegetation cover. (c) 2005 Elsevier B.V All rights reserved. |
英文关键词 | continental dunes dune activity vegetation cover Northern Great Plains Canada |
类型 | Article |
语种 | 英语 |
国家 | Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000232013100005 |
WOS关键词 | HOLOCENE EOLIAN ACTIVITY ; SOUTHWESTERN UNITED-STATES ; GENERAL-CIRCULATION MODEL ; SAND-DUNE ACTIVITY ; PALEOCLIMATIC SIGNIFICANCE ; CANADIAN PRAIRIES ; LOGISTIC GROWTH ; CLIMATE-CHANGE ; SOUTHERN PERU ; MOJAVE DESERT |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/149119 |
作者单位 | (1)Univ Calgary, Dept Geog, Calgary, AB T2N 1N4, Canada;(2)Geol Survey Canada, Terrain Sci Div, Ottawa, ON K1A 0E8, Canada |
推荐引用方式 GB/T 7714 | Hugenholtz, CH,Wolfe, SA. Biogeomorphic model of dunefield activation and stabilization on the northern Great Plains[J],2005,70(1-2):53-70. |
APA | Hugenholtz, CH,&Wolfe, SA.(2005).Biogeomorphic model of dunefield activation and stabilization on the northern Great Plains.GEOMORPHOLOGY,70(1-2),53-70. |
MLA | Hugenholtz, CH,et al."Biogeomorphic model of dunefield activation and stabilization on the northern Great Plains".GEOMORPHOLOGY 70.1-2(2005):53-70. |
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