Researchers reveal recent changes in climate and environment in the Mount Everest region

Mount Everest North Face as seen from the base camp, the road to Tibet. Credit: Luca Galuzzi / Wikipedia

Researchers and their collaborators at the Institute for Environmental and Environmental Resources in the Northwest of the Chinese Academy of Sciences (CAS) have integrated recent climate and environmental changes in the Mount Everest region.

Related results published in Earth science review..

This study is based on literature reviews and up-to-date data and modeling focusing on temperature, precipitation, glacier and glacial lake changes and current conditions, river and lake water quality, atmospheric environment and vegetation bioseasonality. Was there.

According to past temperature records reconstructed from ice cores and annual rings, researchers discovered significant climate warming in the Mount Everest region in the 20th century. “The Mt. Everest region has experienced considerable warming of about 0.33 ° C / 10 years since 1960, based on meteorological observations from 1961 to 2018, but precipitation is relatively stable. “The research leader, Professor Kang Shi-chan, said.

Researchers have found that the Mt. Everest region usually shows a warming trend in the future (2006-2099), and in various scenarios of typical concentration routes 4.5 and 8.5, the winter warming rate is the summer warming rate. I predicted it to be larger than.

They further reported that the current glacier area of ​​Mt. Everest is about 3,266 km.2, This shows a significant reduction from the 1970s to 2010. Due to glacier retreat, river runoff has increased significantly.

Meanwhile, the area of ​​the glacial lake has increased from 106.11 km.2 133.36km from 19902 In 2018, the number of glacial lakes increased by 16.9% from 1,275 in 1990 to 1,490 in 2018.

The team also discovered that there were currently about 95 Glacial lake Potentially at-risk areas, including 17 high-risk lakes and 59 medium-risk lakes in the Mount Everest region.

“All these findings show that the Mount Everest region has a hydrological response to global warming, which can intensify in the coming decades and is downstream. It can threaten the safety of water resources, “said Professor Kang.

Moreover, due to the remote location of Mt. Everest and sparse human activity, the current atmospheric environment is relatively clean. However, researchers have found that long-distance transport of air pollutants from South, West and Central Asia has affected this primitive region and has increased the concentration of pollutants (such as black carbon) since the Industrial Revolution. I made it clear.

Researchers also investigated the Normalized Difference Vegetation Index (NDVI) in the Mount Everest region. They found that NDVI showed an increasing trend from May to September, but changes in primary production were not apparent from 1982 to 2015.

The start time of the long-term vegetation formation was delayed by 1.85 days and the end time was advanced by 0.54 days. The end time on the southern slope changed slightly and the start time did not change significantly.

In addition, they pointed out that direct monitoring data is still lacking, especially in very high altitude areas. This limited our understanding of the processes and mechanisms of multisphere interactions in the Mount Everest region.

“There is an urgent need to establish a long-term and sustainable monitoring system for the climate, environment and ecosystems of Mt. Everest. It is a comprehensive assessment of climate warming and its impact on the local ecosystems, water literature and water resources. It will help you to do it. ” Professor Kang.

Glaciers in the Everest region thinning in the highlands

For more information:
Shichang Kang et al, Warming and Defrosting of Mount Everest: A Review of Climate and Environmental Changes, Earth science review (2021). DOI: 10.1016 / j.earscirev.2021.103911

Quote: Researchers have obtained the Everest Mountains region (February 18, 2022) from https: // on February 18, 2022. Reveals recent changes in the climate and environment of Mt. Everest

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Researchers reveal recent changes in climate and environment in the Mount Everest region

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