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Climate Change Impacts on Glacierize...

Vijayan Nair, Anju,

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Climate Change Impacts on Glacierized Catchments in High Mountain Asia /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Climate Change Impacts on Glacierized Catchments in High Mountain Asia // Anju Vijayan Nair.
Author:	Vijayan Nair, Anju,
Description:	1 electronic resource (179 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
Contained By:	Dissertations Abstracts International87-01B.
Subject:	Hydrologic sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31931224
ISBN:	9798288804564

Climate Change Impacts on Glacierized Catchments in High Mountain Asia /
Vijayan Nair, Anju,

Climate Change Impacts on Glacierized Catchments in High Mountain Asia /Anju Vijayan Nair. - 1 electronic resource (179 pages)

Source: Dissertations Abstracts International, Volume: 87-01, Section: B.

Climate change is one of the most severe global challenges of the 21st century affecting the environmental, social, and economic systems worldwide. The impacts of climate change are pronounced in the high-altitude regions, with snow and glacier cover threatening the livelihoods of billions of people. High Mountain Asia (HMA) is a region of highly complex terrain extending from the Hindu Kush and Tien Shan in the northwest to the eastern Himalayas in the southeast and consists of the largest reserves of glaciers and snow cover outside the polar region, making it vulnerable to climate. Rapid melting and limited restoration of glaciers, reduction in snowpack, and natural hazards like glacial lake outburst floods, landslides, heatwaves, and droughts threaten the livelihoods of people and damage infrastructure and ecosystems in the region. Therefore, a systematic quantification of the climate change impacts over the area, and well-timed communication of the findings to the local communities is crucial in developing proper mitigation strategies and adaptation planning.Owing to the continuous need to understand the impacts of climate on HMA, this work aims to provide high-level insights on historic and future climate change with a specific focus on extreme climate events and hydrological projections over glacierized catchments in HMA. First, the uncertainty in climate variables from commonly used satellite and reanalysis products and their interaction with the uncertainties associated with hydrological models on streamflow simulations are analyzed. Then, the significance of climate model resolution and the influence of topography in representing extreme climate patterns is investigated. Multiple GCMs and statistical downscaling methods are also analyzed to understand the importance of climate model downscaling on future hydrological projections in HMA. Additionally, the changes and projections of extreme temperature-related heatwaves and the associated risks to the local communities over the region are analyzed. The results indicate that the precipitation uncertainty propagation to streamflow exhibits strong dependencies on model structure and streamflow components. The need for high-resolution climate data for climatological and hydrological analyses over complex terrains was emphasized. Moreover, the results highlight the need to consider exposure and vulnerability (i.e. all risk components), beyond just the hazard, to assess effectively the future climate risk of communities in HMA. The findings from this work will provide guidance and critical information to local stakeholders for climate risk assessment over HMA, facilitating informed decision-making.

English

ISBN: 9798288804564Subjects--Topical Terms:

3168407
Hydrologic sciences.
Subjects--Index Terms:

Climate extremes

Climate Change Impacts on Glacierized Catchments in High Mountain Asia /
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520 $a Climate change is one of the most severe global challenges of the 21st century affecting the environmental, social, and economic systems worldwide. The impacts of climate change are pronounced in the high-altitude regions, with snow and glacier cover threatening the livelihoods of billions of people. High Mountain Asia (HMA) is a region of highly complex terrain extending from the Hindu Kush and Tien Shan in the northwest to the eastern Himalayas in the southeast and consists of the largest reserves of glaciers and snow cover outside the polar region, making it vulnerable to climate. Rapid melting and limited restoration of glaciers, reduction in snowpack, and natural hazards like glacial lake outburst floods, landslides, heatwaves, and droughts threaten the livelihoods of people and damage infrastructure and ecosystems in the region. Therefore, a systematic quantification of the climate change impacts over the area, and well-timed communication of the findings to the local communities is crucial in developing proper mitigation strategies and adaptation planning.Owing to the continuous need to understand the impacts of climate on HMA, this work aims to provide high-level insights on historic and future climate change with a specific focus on extreme climate events and hydrological projections over glacierized catchments in HMA. First, the uncertainty in climate variables from commonly used satellite and reanalysis products and their interaction with the uncertainties associated with hydrological models on streamflow simulations are analyzed. Then, the significance of climate model resolution and the influence of topography in representing extreme climate patterns is investigated. Multiple GCMs and statistical downscaling methods are also analyzed to understand the importance of climate model downscaling on future hydrological projections in HMA. Additionally, the changes and projections of extreme temperature-related heatwaves and the associated risks to the local communities over the region are analyzed. The results indicate that the precipitation uncertainty propagation to streamflow exhibits strong dependencies on model structure and streamflow components. The need for high-resolution climate data for climatological and hydrological analyses over complex terrains was emphasized. Moreover, the results highlight the need to consider exposure and vulnerability (i.e. all risk components), beyond just the hazard, to assess effectively the future climate risk of communities in HMA. The findings from this work will provide guidance and critical information to local stakeholders for climate risk assessment over HMA, facilitating informed decision-making.
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