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Simulating Impacts of Ice Storms on Forest Ecosystems
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Ambient noise under stably covered ice.

Xueli Sheng1, Chaoping Dong1, Longxiang Guo1

  • 1Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin, 150001, China.

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|October 31, 2021
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Summary
This summary is machine-generated.

Studying under-ice river noise in China reveals similarities to Arctic ice. This research suggests freshwater river ice environments can effectively simulate Arctic conditions for acoustic studies.

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Area of Science:

  • Acoustics
  • Environmental Science
  • Geophysics

Background:

  • Sea ice and freshwater ice exhibit distinct physical and acoustic properties.
  • Understanding under-ice ambient noise is crucial for Arctic research.

Purpose of the Study:

  • To investigate if the Mudan River's under-ice environment serves as a viable analog for studying Arctic multi-year ice sheets.
  • To analyze under-ice ambient noise characteristics and their correlation with meteorological factors.

Main Methods:

  • Deployment of autonomous hydrophones in the Mudan River.
  • Analysis of noise spectrum levels and frequency correlation matrices.
  • Detection and extraction of ice cracks and Pearson correlation analysis with meteorological data.

Main Results:

  • A linear decrease in noise spectrum level with logarithmic frequency was observed in quiet conditions.
  • Similarities in noise spectrum, crack peak frequency, and temperature-crack intensity correlations were found when compared to Arctic data.
  • Under-ice river noise exhibited characteristics comparable to Arctic under-ice noise.

Conclusions:

  • Freshwater river ice environments can effectively simulate Arctic conditions, particularly regarding thermal-induced cracks and meteorological correlations.
  • Further research is recommended to validate the use of river ice as an analog for Arctic under-ice acoustic studies.