Long-Term and Seasonal Changes of Large Whale Call Frequency in the Southern Indian Ocean

@article{Leroy2018LongTermAS,
  title={Long-Term and Seasonal Changes of Large Whale Call Frequency in the Southern Indian Ocean},
  author={Emmanuelle C. Leroy and Jean-Yves Royer and Julien Bonnel and Flore Samaran},
  journal={Journal of Geophysical Research: Oceans},
  year={2018}
}
Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 1123(11), (2018): 8568-8580. doi: 10.1029/2018JC014352. 

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References

SHOWING 1-10 OF 66 REFERENCES

Antarctic icebergs: A significant natural ocean sound source in the Southern Hemisphere

In late 2007, two massive icebergs, C19a and B15a, drifted into open water and slowly disintegrated in the southernmost Pacific Ocean. Archived acoustic records show that the high‐intensity

Short- and long-term changes in right whale calling behavior: the potential effects of noise on acoustic communication.

Evidence of a behavioral change in sound production of right whales that is correlated with increased noise levels is provided and it is indicated that right whales may shift call frequency to compensate for increased band-limited background noise.

Spatial and temporal trends in fin whale vocalizations recorded in the NE Pacific Ocean between 2003-2013

The frequency and inter-pulse interval of fin whale 20 Hz vocalizations were observed over 10 years from 2003–2013 from bottom mounted hydrophones and seismometers in the northeast Pacific Ocean to help establish whether acoustic characteristics can be used to help determine population identity.

Observations: Oceanic Climate Change and Sea Level

The oceans are warming. Over the period 1961 to 2003, global ocean temperature has risen by 0.10°C from the surface to a depth of 700 m. Consistent with the Third Assessment Report (TAR), global

Decadal trends in Indian Ocean ambient sound.

Evidence of low frequency sound increases in the Indian Ocean is provided by parsing a decade of recordings made off the island of Diego Garcia according to frequency band and sound level to support interpretation of source functions driving the trends.

Seasonal and Diel Vocalization Patterns of Antarctic Blue Whale (Balaenoptera musculus intermedia) in the Southern Indian Ocean: A Multi-Year and Multi-Site Study

Assessment of six years of continuous acoustic recordings at up to seven different locations in the Central and Southern Indian Basin to assess the peak periods of presence, seasonality and migration movements of Antarctic blue whales suggests these sites are on the Antarctic blue whale migration routes.

Ocean noise in the tropical and subtropical Pacific Ocean.

Overall, ambient noise at these seven sites was 10-20 dB lower than reported recently for most other locations in the North Pacific, and there was a seasonal variation in ambient Noise at frequencies >200 Hz with higher levels recorded in the winter than in the summer.

Seafloor seismicity, Antarctic ice-sounds, cetacean vocalizations and long-term ambient sound in the Indian Ocean basin

This paper presents the results from the Deflo-hydroacoustic experiment in the Southern Indian Ocean using three autonomous underwater hydrophones, complemented by two permanent hydroacoustic

Geographic and seasonal variation of blue whale calls in the North Pacific

The call characteristics and distribution of blue whales in the North Pacific were examined by use of acoustic surveys. Two dis tinct vocalisation types have been previously attributed to blue whales
...