气候变化及其对尼泊尔喜马拉雅地区冰川和冰湖的影响

IF 3.4 2区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Nitesh Khadka, Xiaoqing Chen, Shankar Sharma, Bhaskar Shrestha
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引用次数: 0

摘要

尼泊尔是一个喜马拉雅国家,经常被全球科学家选择研究气候变化及其对喜马拉雅环境的影响。根据已发表的文献,并与区域研究进行了比较,全面回顾了尼泊尔的温度、降水、冰川和冰川湖的变化。利用已公布的冰川资料,计算分析了冰川面积、海拔平衡线(ELA)和冰储量的变化,揭示了冰川对气候变化的响应。研究发现,尼泊尔地区的变暖趋势(0.02 ~ 0.16°C /年)更为明显,降水数量、模式和频率的异质性变化无显著趋势。同时,发现冰川具有非均匀的面积收缩(−1 ~−5 km 2 yr−1)、负质量平衡(−0.3 ~−0.8 m w.e. yr−1)、冰量减少(−4.29 km 3 yr−1)和ELA上移(~ 20.66 m 10年−1)的响应。在过去的30年里,尼泊尔的总冰储量(- 128.84 km 3)的减少导致海平面上升了~ 0.32 mm。此外,尼泊尔冰川湖的形成和表面积的扩大(0.83% yr - 1)也加快了。此外,我们注意到尼泊尔非常容易受到冰湖溃决洪水(GLOF)事件的影响,并记录了来自尼泊尔39个冰湖的45个可靠的报告和未报告的历史GLOF事件。这一审查将有助于全面了解气候变化的现状,并确定尼泊尔现有的知识差距。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Climate change and its impacts on glaciers and glacial lakes in Nepal Himalayas
Abstract Nepal, a Himalayan country, is often chosen by global scientists to study climate change and its impact on the Himalayan environment. The changes in temperature, precipitation, glaciers, and glacial lakes over Nepal are comprehensively reviewed based on published literature and compared with regional studies. Furthermore, the published glacier datasets were used to calculate and analyze the changes in area, equilibrium line of altitude (ELA) and ice reserves to show the response of glaciers to climate change. We find that the warming trend (0.02 to 0.16 °C yr −1 ) is being more pronounced over Nepal, and heterogeneous changes in precipitation amount, pattern, and frequency are observed with no significant trend. Concurrently, the glaciers are found to be responding with heterogeneous shrinkage in area (− 1 to − 5 km 2 yr −1 ), possessing negative mass balance (− 0.3 to − 0.8 m w.e. yr −1 ), decrease in ice volume (− 4.29 km 3 yr −1 ) and upward shift of the ELA (~ 20.66 m decade −1 ). The total decrease in ice reserve (− 128.84 km 3 ) of Nepal has resulted in ~ 0.32 mm of sea level rise in past 30 years. Moreover, the formation and surface area expansion (0.83 % yr −1 ) of glacial lakes over Nepal have been accelerated. Additionally, we note that Nepal is highly susceptible to glacial lake outburst flood (GLOF) events and document a total of 45 reliable reported and unreported historical GLOF events from 39 glacial lakes across Nepal. This review will facilitate a comprehensive understanding of the current state of climate change and the identification of existing knowledge gaps in Nepal.
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来源期刊
Regional Environmental Change
Regional Environmental Change 环境科学-环境科学
CiteScore
6.80
自引率
2.40%
发文量
125
审稿时长
4.5 months
期刊介绍: Environmental changes of many kinds are accelerating worldwide, posing significant challenges for humanity. Solutions are needed at the regional level, where physical features of the landscape, biological systems, and human institutions interact. The goal of Regional Environmental Change is to publish scientific research and opinion papers that improve our understanding of the extent of these changes, their causes, their impacts on people, and the options for society to respond. "Regional" refers to the full range of scales between local and global, including regions defined by natural criteria, such as watersheds and ecosystems, and those defined by human activities, such as urban areas and their hinterlands. We encourage submissions on interdisciplinary research across the natural sciences, social sciences and humanities, and on more focused studies that contribute towards the solutions to complex environmental problems. Topics addressed include (i) the regional manifestations of global change, especially the vulnerability of regions and sectors; (ii) the adaptation of social-ecological systems to environmental change in the context of sustainable development; and (iii) trans-boundary and cross-jurisdictional issues, legislative and governance frameworks, and the broad range of policy and management issues associated with building, maintaining and restoring robust social-ecological systems at regional scales. The primary format of contributions are research articles, presenting new evidence from analyses of empirical data or else more theoretical investigations of regional environmental change. In addition to research articles, we also publish editorials, short communications, invited mini-reviews on topics of strong current interest, as well as special features that provide multifaceted discussion of complex topics or particular regions
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