Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.3354/cr01518 |
Statistical modelling of snow cover dynamics in the Central Himalaya Region, Nepal | |
Weidinger, J.1; Gerlitz, L.2; Bechtel, B.1; Boehner, J.1 | |
2018 | |
发表期刊 | CLIMATE RESEARCH
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ISSN | 0936-577X |
EISSN | 1616-1572 |
出版年 | 2018 |
卷号 | 75期号:3页码:181-199 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Snow cover modelling is primarily focussed on snow depletion in the context of hydrological research. Degree-day or temperature index models (TIMs) as well as energy balance models (EBMs) are conventional to quantify catchment runoff. Whereas the former exploit relationships between snow (and/or ice) melt and air temperatures, the latter rest upon quantifying melt as the deviation from heat balance equations. However, the 2 approaches contain distinct drawbacks. For example, increasing temporal resolution decreases the accuracy of TIMs, and no spatial variability is provided, whereas EBMs have large dataset requirements for climate, landscape and soil properties. Nevertheless, detailed knowledge about shifts in seasonal ablation times and spatial distribution of snow cover is crucial for understanding hydrological systems, plant distribution and various other research interests. Therefore, we propose a statistical model based on a combination of high resolution spatio-temporal climate datasets and climate-related topographic data, which were obtained by meteorological network stations, remote sensing and GIS analysis. The main objectives were to identify suitable inputs and to develop a robust binary snow distribution model that enables the mapping of major physical processes controlling snow accumulation, melt and stagnation in a high mountain environment in the Gaurishankar Conservation Area in Nepal. We used the random forest technique, which represents a state of the art machine learning algorithm. The snow distribution was predicted very accurately with high spatio-temporal resolution (daily on 0.5 x 0.5 km), with hit rates of around 90% and an overall model accuracy of 90.8% compared to independent Moderate Resolution Imaging Spectroradiometer (MODIS) observations. |
英文关键词 | Snow cover Remote sensing MODIS Statistical modelling Himalaya Random forest |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000446364500001 |
WOS关键词 | CLIMATE-CHANGE ; RANDOM FORESTS ; WATER STORAGE ; MODIS ; PRECIPITATION ; RUNOFF ; SIMULATION ; BALANCE ; ENERGY ; TEMPERATURE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/15169 |
专题 | 气候变化 |
作者单位 | 1.Univ Hamburg, Inst Geog, Ctr Earth Syst Res & Sustainabil, CEN, D-20146 Hamburg, Germany; 2.Helmholtz Ctr Potsdam, German Res Ctr Geosci, GFZ, D-14473 Potsdam, Germany |
推荐引用方式 GB/T 7714 | Weidinger, J.,Gerlitz, L.,Bechtel, B.,et al. Statistical modelling of snow cover dynamics in the Central Himalaya Region, Nepal[J]. CLIMATE RESEARCH,2018,75(3):181-199. |
APA | Weidinger, J.,Gerlitz, L.,Bechtel, B.,&Boehner, J..(2018).Statistical modelling of snow cover dynamics in the Central Himalaya Region, Nepal.CLIMATE RESEARCH,75(3),181-199. |
MLA | Weidinger, J.,et al."Statistical modelling of snow cover dynamics in the Central Himalaya Region, Nepal".CLIMATE RESEARCH 75.3(2018):181-199. |
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