Abstract The current research work deals with the health of Chorabari glacier between 1976 and 2017, using multi spectral and multi dated satellite data series of LANDSAT (MSS, TM, and ETM+) and RESOURCESAT II (LISS IV). Result closely reveals that the studied glacier receding continuously with inconsistent rate for the last 41 years and rate of receding dominates significantly after 2012. It lost ~306.43 ± 61 m total length (7.46 ± 1.48 m a−1); 0.074 km2 frontal area (0.0018 km2 a−1); 0.31 km2 (24%) glaciated area (0.007 km2 a−1); 0.015 km3 (32.60%) glaciated volume. The upward migration of SLA (Snow Line Altitude) from 5265 m to 5290 m also suggests that the melting process were prevailing during the study tenure. An existence of supra glacial lakes and its successive growth over the surface of Chorabari glacier further justifies that the temperature of the surroundings has increased significantly and influences the melting process as well. The melting process between 1976 and 1990 of the studied glacier directly influenced by the frequent episodes of precipitation and temperature anomalies of central Himalayan region during 1960–1990. While the melting process after 1990 is directly influenced by the increase in average mean temperature and decrease in average mean precipitation of Garhwal Himalayan region. The tree ring data of Garhwal Himalaya region also well matches the precipitation data of IMD (Indian Meteorological Department). The overall analysis explains that the Chorabari glacier is retreating continuously since 1976.

中文翻译：

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1976 年至 2017 年印度加瓦尔喜马拉雅山乔拉巴里冰川的时空波动

摘要 目前的研究工作涉及 1976 年至 2017 年间乔拉巴里冰川的健康状况，使用 LANDSAT（MSS、TM 和 ETM+）和 RESOURCESAT II（LISS IV）的多光谱和多日期卫星数据系列。结果密切显示，研究的冰川在过去41年中以不一致的速率不断后退，2012年后后退速度显着占主导地位。总长度减少了~306.43±61 m（7.46±1.48 ma-1）；0.074 平方公里锋面 (0.0018 平方公里 a-1)；0.31 平方公里 (24%) 冰川区 (0.007 平方公里 a-1)；0.015 km3 (32.60%) 冰川体积。SLA（雪线高度）从 5265 m 向上迁移到 5290 m 也表明在研究期间融化过程占主导地位。超冰湖的存在及其在乔拉巴里冰川表面的连续增长进一步证明了周围环境的温度显着升高并影响了融化过程。1976-1990年间研究冰川的融化过程直接受到1960-1990年喜马拉雅中部地区频繁降水和温度异常的影响。而1990年以后的融化过程直接受到加瓦尔喜马拉雅地区平均气温升高和平均降水量减少的影响。Garhwal喜马拉雅地区的树木年轮数据也与IMD（印度气象局）的降水数据很好地匹配。总体分析表明，乔拉巴里冰川自 1976 年以来一直在后退。