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Long-term (~40 years) mass balance appraisal and response of the Patsio glacier, in the Great Himalayan region towards climate change
Journal of Earth System Science ( IF 1.9 ) Pub Date : 2021-03-03 , DOI: 10.1007/s12040-021-01555-9
Anant Kumar , H S Negi , Kamal Kumar

Research highlights

  • Field based temperature lapse rate, precipitation gradient and snow melt factor established for the Patsio glacier.

  • Seasonal sensitivity of the glacier mass balance was studied.

  • Past reconstruction of the glacier mass balance using bias corrected ERA5 reanalysis.

  • Comparison of modeled mass balance with published geodetic and glaciological results.

Abstract

Comprehensive assessment of the long-term mass balance (40 years) has been performed for Patsio glacier located in Bhaga river basin in the Great Himalayan region. The temperature-index approach has been employed for generating the time-series of annual specific mass balance of 25 years (1993–2018) using Snow and Avalanche Study Establishment (SASE) field observatory data in Patsio region. Results based on observational data showed nearly balanced condition until the year 1999 (+0.03 m.w.e/yr), followed by an accelerated rate of mass loss during the period 2000–2007 (−0.17 m.w.e./yr). This was evident due to the annual rise (+0.7°C) in the temperature and drop (−122 mm) in the amount of precipitation during 2000–2007. A slight drop in the mass balance (−0.14 m.w.e/yr) was observed during the past decade (2008–2018) which was well supported by in-situ climate observations and published geodetic results in the region. The altitudinal distribution of modelled mass balance was observed well in correlation with the glaciological measurements for the periods 2010–2011 and 2011–2012. Further, seasonal sensitivity characteristic (SSC) was developed for the glacier illustrating the dependence of specific mass balance on monthly anomalies in temperature and precipitation. The developed SSC was used with bias-corrected temperature and precipitation estimates from recently released ERA5 reanalysis to reconstruct annual specific mass balance during since 1979s.



中文翻译:

大喜马拉雅地区对气候变化的Patsio冰川的长期(约40年)质量平衡评估和响应

研究重点

  • 为Patsio冰川建立了基于场的温度下降速率,降水梯度和融雪因子。

  • 研究了冰川质量平衡的季节性敏感性。

  • 过去使用偏差校正的ERA5重新分析重建冰川质量平衡。

  • 建模的质量平衡与已发表的大地测量和冰川学结果的比较。

抽象的

已对位于大喜马拉雅地区巴格河流域的Patsio冰川进行了长期质量平衡(40年)的综合评估。温度指数方法已被用来利用Patsio地区的雪和雪崩研究机构(SASE)实地观测数据生成25年(1993-2018)的年特定质量平衡的时间序列。根据观测数据得出的结果表明,直到1999年(+0.03 mwe / yr),状况几乎达到平衡,其后2000-2007年期间质量损失加速增长(-0.17 mwe / yr)。这很明显是由于2000-2007年期间气温的逐年上升(+ 0.7°C)和降水量的下降(−122 mm)。在过去十年(2008-2018年)中,观察到质量平衡略有下降(-0.14 mwe / yr),这得到了以下方面的良好支持该地区的原位气候观测和已发布的大地测量结果。在2010-2011年和2011-2012年期间,很好地观察到了模拟质量平衡的高度分布与冰川测量的相关性。此外,为冰川开发了季节性敏感性特征(SSC),说明了特定质量平衡对温度和降水月度异常的依赖性。自1979年代以来,已开发的SSC与最近发布的ERA5再分析一起用于偏差校正的温度和降水估算,以重建年度比质量平衡。

更新日期:2021-03-04
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