globalchange  > 科学计划与规划
DOI: 10.1002/2014GL062950
论文题名:
Unusually loud ambient noise in tidewater glacier fjords: A signal of ice melt
作者: Pettit E.C.; Lee K.M.; Brann J.P.; Nystuen J.A.; Wilson P.S.; O'Neel S.
刊名: Geophysical Research Letters
ISSN: 0094-8771
EISSN: 1944-8502
出版年: 2015
卷: 42, 期:7
起始页码: 2309
结束页码: 2316
语种: 英语
英文关键词: fjord circulation ; glacier change ; ice-ocean interactions ; marine mammal behavior ; passive acoustics ; tidewater glaciers
Scopus关键词: Acoustics ; Ice ; Mammals ; Oceanography ; Sea ice ; Glacier change ; Ice-ocean interactions ; Marine mammals ; Passive acoustics ; Tidewater glaciers ; Acoustic noise ; ambient noise ; bubble ; fjord ; glacial transport ; ice-ocean interaction ; melting ; oceanic circulation ; sound velocity ; water column ; Alaska ; United States ; Mammalia
英文摘要: In glacierized fjords, the ice-ocean boundary is a physically and biologically dynamic environment that is sensitive to both glacier flow and ocean circulation. Ocean ambient noise offers insight into processes and change at the ice-ocean boundary. Here we characterize fjord ambient noise and show that the average noise levels are louder than nearly all measured natural oceanic environments (significantly louder than sea ice and nonglacierized fjords). Icy Bay, Alaska, has an annual average sound pressure level of 120 dB (referenced to 1 μPa) with a broad peak between 1000 and 3000 Hz. Bubble formation in the water column as glacier ice melts is the noise source, with variability driven by fjord circulation patterns. Measurements from two additional fjords, in Alaska and Antarctica, support that this unusually loud ambient noise in Icy Bay is representative of glacierized fjords. These high noise levels likely alter the behavior of marine mammals. ©2015. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928697044&doi=10.1002%2f2014GL062950&partnerID=40&md5=cd2e1227b841d9f0a0328d30e02aaf20
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8387
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Geosciences, University of Alaska Fairbanks, Fairbanks, AK, United States

Recommended Citation:
Pettit E.C.,Lee K.M.,Brann J.P.,et al. Unusually loud ambient noise in tidewater glacier fjords: A signal of ice melt[J]. Geophysical Research Letters,2015-01-01,42(7).
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