Mongolian River & Lake Ice Trends.pdf

AIACC_WP_No004.pdf
Preview of Mongolian River & Lake Ice Trends
🔗 Source: start.org
📊 Size: 297 KB
👤 Author: Sara Beresford
⬇️ Downloads: 62

Summary

- Duration and Thickness of River and Lake Ice in Mongolia: Rivers and lakes in Mongolia are covered by ice 0.8-3.2 meters thick for five or six months each winter season. Small rivers may freeze to the bed. Over 40 ice forms/processes occur during the cold season.
- Ice Phenology: The average date of first ice occurrence is the third week of October, with freezing continuing until the third and last week of November. The ice cover duration averages 145 days.
- Climate Change Impact: Over the last 60 years, Mongolia's annual mean air temperature has increased by 1.66°C, with winter temperatures rising by 3.61°C. This has led to shifts in ice phenology (3-30 days earlier freeze-up and break-up dates), reduced ice cover duration, and decreased maximum ice thickness from the 1960s to 2000.
- Monitoring and Data: The National Agency for Meteorology, Hydrology, and Environment Monitoring oversees a network of about 120 gauging sites at more than 70 rivers. The Institute of Meteorology and Hydrology (IMN) analyzes the observed data.
- Selected Rivers and Lakes: Table 1 lists 17 rivers and lakes with their respective ice regime characteristics, including average ice freeze-up and break-up dates, ice cover duration, and maximum ice thickness.

Description

River and lake ice in Mongolia is declining due to climate change.

Technical Information

  • File Format: PDF
  • File Size: 297 KB
  • Pages: 12
  • Language: EN
  • Author: Sara Beresford
  • Total Downloads: 62
  • Last Updated: 1 week ago

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