木孜塔格峰地区冰川反照率时空变化及其影响因素研究

doi:10.12118/j.issn.1000-6060.2024.776

Abstract

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

ZHANG Yujiao, HUAI Baojuan, WANG Shengjie, CHE Yanjun, ZHANG Mingjun. Spatio-temporal variation of glacial albedo and its influencing factors in the Muz Tag Peak area[J].Arid Land Geography, 2025, 48(10): 1760-1770.

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影像中心点	传感器类型	飞行日期	高程/m	分辨率/m	大气模式	气溶胶模式
87.55875278°E 36.03851667°N	OLI	2015/4/14 04：45：20	4959	30	Sub-Arctic Summer	Rural
能见度/km	气溶胶高度/km	CO₂混合比	Modtran分辨率/cm^-1	散射模型	DISORT流数
40	1.25	390	15	scale DISCORT	8

像元值	含义
0~100	积雪反照率
101	不确定的地物类型
111	夜间
125	无积雪覆盖的陆地
137	内流湖
139	开阔水体
150	云层覆盖
251	自身阴影
252	陆地界限不匹配
253	BRDF故障
254	没有匹配的数据
250	缺失的数据

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

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