Acoustic remote sensing of Arctic sea ice from long term soundscape measurements

The Arctic sea ice melting, in the global warming context, has become a major scientific topic during the last 30 years. The Arctic Ocean plays a fundamental role in the global climate balance and requires a particular attention. The Arctic Regions are then monitored by satellite observations and in...

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Bibliographic Details
Main Author: Kinda, Gnouregma Bazile
Other Authors: Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Université de Grenoble, Jérôme Mars, Yann Stephan, Cédric Gervaise
Format: Doctoral or Postdoctoral Thesis
Language:French
Published: HAL CCSD 2013
Subjects:
Arctic remonte sensing
Arctic sea ice
Arctic soundscape
Noise estimation
Transient detection
Monitorage de l'Arctique
Glace de mer
Paysage sonore de l'Arctique
Bruit ambiant
Détection de transitoires
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Arctic
Arctic Ocean
Arctique*
Global warming
Sea ice
Online Access:https://theses.hal.science/tel-01132568
https://theses.hal.science/tel-01132568/document
https://theses.hal.science/tel-01132568/file/39121_KINDA_2013_archivage.pdf
Description
Summary:The Arctic sea ice melting, in the global warming context, has become a major scientific topic during the last 30 years. The Arctic Ocean plays a fundamental role in the global climate balance and requires a particular attention. The Arctic Regions are then monitored by satellite observations and in-situ measurements. The climatic impact of the total melting of the Arctic sea ice is not yet understood and researches are still needed for long term monitoring of Arctic Ocean, particularly the dynamics of the ice cover and its consequences on the ecosystems. Our work focused on the natural soundscapes of these Polar Regions prior to their possible industrialization. So, we first examined the impact of climate warming alone on polar soundscapes by studying the seasonal variability of ambient noise and its environmental drivers. We then developed an ambient noise estimation algorithm for automatic extraction of this noise component from long term measurements. In second, we examined the acoustic transients generated by the mechanical behavior of the ice cover at its maximum extent. This aims to better understanding of the physical processes involved in under-ice noise production and their potential use for sea ice monitoring. La fonte rapide des glaces de l'Arctique dans le contexte actuel du réchauffement climatique est un sujet scientifique majeur de ces 30 dernières années. L'Arctique joue un rôle fondamental dans l'équilibre du climat et requiert une attention particulière. Les régions arctiques sont alors surveillées par des observations satellitaires et des mesures in-situ. L'impact climatique de la fonte totale de la glace arctique est encore spéculatif. Des recherches sont donc nécessaires pour le suivi à long terme de l'Océan Arctique, en particulier la dynamique spatio-temporelle de la couverture de glace et ses conséquences sur les écosystèmes. Notre travail s'inscrit dans ce contexte, et est porté sur le paysage sonore des régions polaires avant leur possible industrialisation qui accompagnera la fonte ...

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