Land cover and land use changes in the oil and gas regions of Northwestern Siberia under changing climatic conditions

被引:28
|
作者
Yu, Qin [1 ]
Epstein, Howard E. [2 ]
Engstrom, Ryan [1 ]
Shiklomanov, Nikolay [1 ,3 ]
Strelestskiy, Dmitry [1 ,4 ,5 ]
机构
[1] George Washington Univ, Dept Geog, Washington, DC 20052 USA
[2] Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA
[3] Tyumen State Oil & Gas Univ, Tyumen 625000, Tyumen Oblast, Russia
[4] State Hydrol Inst, St Petersburg, Russia
[5] SB RAS Tyumen, Earth Cryosphere Inst, Tyumen, Russia
来源
ENVIRONMENTAL RESEARCH LETTERS | 2015年 / 10卷 / 12期
基金
美国国家科学基金会; 俄罗斯科学基金会;
关键词
arctic ecosystems; Corona; land use change; Quickbird; permafrost; remote sensing indices; Landsat; NORTH-AMERICA; SYSTEM; VULNERABILITY; DISTURBANCE; DYNAMICS; ECOSYSTEMS; EXPANSION; TRENDS; ALASKA; SHRUB;
D O I
10.1088/1748-9326/10/12/124020
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Northwestern Siberia has been undergoing a range of land cover and land use changes associated with climate change, animal husbandry and development of mineral resources, particularly oil and gas. The changes caused by climate and oil/gas development Southeast of the city of Nadym were investigated using multi-temporal and multi-spatial remotely sensed images. Comparison between high spatial resolution imagery acquired in 1968 and 2006 indicates that 8.9% of the study area experienced an increase in vegetation cover (e.g. establishment of new saplings, extent of vegetated cover) in response to climate warming while 10.8% of the area showed a decrease in vegetation cover due to oil and gas development and logging activities. Waterlogging along linear structures and vehicle tracks was found near the oil and gas development site, while in natural landscapes the drying of thermokarst lakes is evident due to warming caused permafrost degradation. A Landsat time series dataset was used to document the spatial and temporal dynamics of these ecosystems in response to climate change and disturbances. The impacts of land use on surface vegetation, radiative, and hydrological properties were evaluated using Landsat image-derived biophysical indices. The spatial and temporal analyses suggest that the direct impacts associated with infrastructure development were mostly within 100 m distance from the disturbance source. While these impacts are rather localized they persist for decades despite partial recovery of vegetation after the initial disturbance and can have significant implications for changes in permafrost dynamics and surface energy budgets at landscape and regional scales.
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页数:13
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