收藏设为首页 广告服务联系我们在线留言

干旱区地理 ›› 2025, Vol. 48 ›› Issue (10): 1760-1770.doi: 10.12118/j.issn.1000-6060.2024.776 cstr: 32274.14.ALG2024776

• 气候与水文 • 上一篇    下一篇

木孜塔格峰地区冰川反照率时空变化及其影响因素研究

张玉娇1(), 怀保娟2, 王圣杰1(), 车彦军3, 张明军1   

  1. 1.西北师范大学地理与环境科学学院,甘肃 兰州 730070
    2.山东师范大学地理与环境学院,山东 济南 250300
    3.宜春学院地理科学系,江西 宜春 336000
  • 收稿日期:2024-12-19 修回日期:2025-02-22 出版日期:2025-10-25 发布日期:2025-10-27
  • 通讯作者: 王圣杰(1987-),男,教授,主要从事同位素水文气候研究. E-mail: geowang@126.com
  • 作者简介:张玉娇(2001-),女,硕士研究生,主要从事寒旱区生态水文研究. E-mail: geozhangyj@163.com
  • 基金资助:
    国家科技基础资源调查专项(2021xjkk0101);国家自然科学基金项目(42261008);甘肃省基础研究创新群体项目(22JR5RA129)

Spatio-temporal variation of glacial albedo and its influencing factors in the Muz Tag Peak area

ZHANG Yujiao1(), HUAI Baojuan2, WANG Shengjie1(), CHE Yanjun3, ZHANG Mingjun1   

  1. 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China
    2. College of Geography and Environment, Shandong Normal University, Jinan 250300, Shandong, China
    3. Department of Geographical Science, Yichun University, Yichun 336000, Jiangxi, China
  • Received:2024-12-19 Revised:2025-02-22 Published:2025-10-25 Online:2025-10-27

摘要:

冰川反照率是影响冰川融化速度和环境变化的关键因子。采用高空间分辨率的Landsat OLI影像和高时间分辨率的MOD10A1反照率产品,开展了2015—2020年木孜塔格峰地区冰川反照率时空变化特征以及影响因素研究。结果表明:(1) Landsat OLI和MOD10A1反照率两者结果随时间变化的趋势较为一致,具有较高的相关性,决定系数(R2)为0.92。(2) 在年际变化上,夏季反照率最低,秋季初期反照率较高。冬春季降雪次数减少,冰川表面积雪密实化,反照率随之减小。(3) 在空间变化上,随着海拔升高,冰川表面反照率逐渐升高,呈指数函数关系(消融区和积累区的R2分别为0.23和0.25)。(4) 气温和降水是影响冰川反照率的关键因素,气温升高和降雪减少会导致反照率降低。地形对冰川反照率有显著影响,坡度较缓的冰川表面反照率较高,坡度较陡的冰川表面反照率较低。研究结果为理解木孜塔格峰地区冰川变化机制和预测未来气候变化提供了科学依据。

关键词: 冰川反照率, 时空变化, Landsat OLI, MOD10A1, 木孜塔格冰川

Abstract:

Glacier albedo is a key factor influencing the rate of glacier melting and associated environmental changes. In this study, Landsat OLI images with high spatial resolution and MOD10A1 albedo products with high temporal resolution were used to analyze the spatiotemporal variations of glacier albedo and its influencing factors in the Muz Tag Peak area, Xinjiang, China from 2015 to 2020. The results show that: (1) The albedo values derived from Landsat OLI and MOD10A1 are highly consistent, with a strong correlation (R2=0.92). (2) Seasonally, the lowest albedo occurs in summer, while higher values are observed in early autumn. In winter and spring, reduced snowfall and densification of surface snow lead to decreasing albedo. (3) Spatially, glacier surface albedo increases with elevation, following an exponential relationship (R2=0.23 in the ablation area and 0.25 in the accumulation area). (4) Air temperature and precipitation are the primary factors affecting glacier albedo, as higher temperatures and reduced snowfall result in lower albedo. Topography also exerts a significant effect, with gentler slopes exhibiting lower albedo and steeper slopes showing higher albedo. This study provides a scientific basis for understanding glacier change mechanisms in the Muz Tag Peak area and for predicting future climate change.

Key words: glacial albedo, spatio-temporal variation, Landsat OLI, MOD10A1, Muz Tag Glacier