| 博斯腾湖流域积雪的时空变化特征及其与气候因子的关系 |
| Spatiotemporal Changes of Snow Cover in the Bosten Lake Basin and Its Relationship with Climate Factors |
| 投稿时间：2019-04-17 修订日期：2020-07-31 |
| DOI：10.15928/j.1674-3075.2020.04.002 |
| 中文关键词:博斯腾湖 积雪 时空变化 气候因子 |
| 英文关键词:Bosten Lake snow cover spatiotemporal variation climate factors |
| 基金项目:变化环境下干旱区湖泊流域水-生态-经济复合系统的协同进化与发展模式研究（U1703341）；国家自然科学基金“内陆地震热异常的形成机理与分离研究”（41764003） |
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| 中文摘要: |
| 基于2001-2017年博斯腾湖流域MODIS积雪信息，探究不同海拔积雪分布及其与海拔高度、温度和降水的关系，可为新疆地区河流水资源分配利用提供数据支持，对我国气候和生态环境安全保障有重要作用。结果表明：（1）博斯腾湖流域2001-2017年的月平均积雪覆盖年内呈“V”型变化，其中夏季和冬季呈减少趋势。（2）空间分布上，海拔1500 m以下区域积雪日数为100 d以下；海拔1500～4000 m的区域积雪日数增加到200 d以上；海拔4000 m以上积雪日数增加到360 d左右。（3）博斯腾湖流域年均积雪、海拔和地表温度之间的关系表明，积雪日数和DEM之间呈正相关关系，与地表温度呈负相关关系。（4）地表温度与积雪呈负相关关系，以春季的负相关性最强；降水与积雪呈正相关关系，以夏季的正相关性最强。（5）博斯腾湖流域积雪变化以降水为主驱动区域占总面积的24.86%，以LST为主驱动区域占总面积的2.08%，以LST和降水为共同强驱动区域占总面积的1.32%，以LST、降水为共同弱驱动区域占总面积的4.29%；非气候因子驱动区影响因素随着海拔的升高而增加。博斯腾湖流域积雪时空分布变异不仅是受气候变化的影响，还受海拔高度差异等因素的共同作用。 |
| 英文摘要: |
| Understanding of the spatiotemporal distribution of snow cover in the Bosten Lake basin supports efforts to improve water resource usage, forecasting, management and assessment. Based on MODIS snow cover information in the Bosten Lake basin from 2001 to 2017, we explored the distribution of snow cover at different altitudes and its relationship with altitude, land surface temperature (LST) and precipitation. Our study provides data supporting the allocation and utilization of river water resources in Xinjiang. Results show that: (1) Monthly average snow cover in the Bosten Lake basin (2001-2017) began increasing in August, peaked at 87.5% in January, and decreased to a minimum of 14.2% in July. (2) Spatially, the number of snow cover days was less than 100 days at below 1500 m, over 200 days at 1500-4000 m, and approximate 360 d at altitudes above 4 000 m. (3) The number of snow cover days correlated positively with altitude. (4) The number of snow cover days correlated negatively with land surface temperature (LST) and the negative correlation was strongest in spring. Snow cover correlated positively with precipitation and the correlation was strongest in summer. (5) Climate factors were associated with a change in snow cover in 32.55% of the area of the Bosten Lake basin, primarily in the western and northern basin. Precipitation was the primary driver, accounting for changes in 24.86% of the basin area, followed by LST, accounting for changes in 2.08%. The combined effect of precipitation and LST strongly affected 1.32% of the basin area and weakly affected 4.29% of the area. Changes in the spatiotemporal distribution of snow cover in the Bosten Lake basin were affected by climate change, but non-climate factors also affected snow cover and the relative effect of non-climate factors increased with altitude. |
| 肉克亚木.艾克木,玉素甫江·如素力,玛地尼亚提·地里夏提.2020.博斯腾湖流域积雪的时空变化特征及其与气候因子的关系[J].水生态学杂志,41(4):9-18. |
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