+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Quantifying seismic survey reverberation off the Alaskan North Slope

, : Quantifying seismic survey reverberation off the Alaskan North Slope. Journal of the Acoustical Society of America 130(5): 3046-3058

Shallow-water airgun survey activities off the North Slope of Alaska generate impulsive sounds that are the focus of much regulatory attention. Reverberation from repetitive airgun shots, however, can also increase background noise levels, which can decrease the detection range of nearby passive acoustic monitoring (PAM) systems. Typical acoustic metrics for impulsive signals provide no quantitative information about reverberation or its relative effect on the ambient acoustic environment. Here, two conservative metrics are defined for quantifying reverberation: a minimum level metric measures reverberation levels that exist between airgun pulse arrivals, while a reverberation metric estimates the relative magnitude of reverberation vs expected ambient levels in the hypothetical absence of airgun activity, using satellite-measured wind data. The metrics are applied to acoustic data measured by autonomous recorders in the Alaskan Beaufort Sea in 2008 and demonstrate how seismic surveys can increase the background noise over natural ambient levels by 30-45 dB within 1 km of the activity, by 10-25 dB within 15 km of the activity, and by a few dB at 128 km range. These results suggest that shallow-water reverberation would reduce the performance of nearby PAM systems when monitoring for marine mammals within a few kilometers of shallow-water seismic surveys.


PMID: 22087932

DOI: 10.1121/1.3628326

Other references

Chiu, S.; Wang, T.; Belski, M.; Abourashed, E.A., 2016: HPLC-Guided Isolation, Purification and Characterization of Phenylpropanoid and Phenolic Constituents of Nutmeg Kernel (Myristica fragrans). Many studies on the biological activities of nutmeg continue to appear in the literature. The most common targets include GIT, CNS, oxidative stress and inflammation. However, results obtained from most studies are often inconsistent due to the va...

Yoshino, K.; Oba, K.; Maibach, H.I., 1986: A simplified disc technique for quantitating mouse DNA, RNA and protein synthesis: circadian rhythms. 1) A modified disc technique has been developed for quantitating DNA, RNA and protein synthesis in epidermal hairless mouse skin and utilized in examining circadian rhythms. 2) The modified epidermal assay for DNA synthesis, utilizing dissolution...

Brixner, D., 2006: Assessment of the prevalence and costs of osteoporosis treatment options in a real-world setting. Osteoporosis-related nonvertebral fractures increase the risks for morbidity and mortality and add substantially to treatment costs. As an adjunct to controlled, clinical trials, observational studies based on information from large, integrated me...

Salvi, S.; Varesano, S.; Boccardo, S.; Ravetti, J.Louis.; Canessa, P.Aldo.; Pistillo, M.Pia.; Ferro, P.; Fedeli, F.; Roncella, S., 2017: FISH Analysis of Crizotinib Target Genes ROS1/ALK/MET in Malignant Mesothelioma. Journal of Thoracic Oncology 12(8): E116-E118

Baghy, Kélia.; Horváth, Z.; Regős, E.; Kiss, K.; Schaff, Z.; Iozzo, R.V.; Kovalszky, I., 2013: Decorin interferes with platelet-derived growth factor receptor signaling in experimental hepatocarcinogenesis. Decorin, a secreted small leucine-rich proteoglycan, acts as a tumor repressor in a variety of cancers, mainly by blocking the action of several receptor tyrosine kinases such as the receptors for hepatocyte, epidermal and insulin-like growth fact...

Staten, L.K.; Teufel-Shone, N.I.; Steinfelt, V.E.; Ortega, N.; Halverson, K.; Flores, C.; Lebowitz, M.D., 2005: The school health index as an impetus for change. The increase in childhood obesity and prevalence of chronic disease risk factors demonstrate the importance of creating healthy school environments. As part of the Border Health Strategic Initiative, the School Health Index was implemented in publ...

Franzetti, A.; Gandolfi, I.; Gaspari, E.; Ambrosini, R.; Bestetti, G., 2011: Seasonal variability of bacteria in fine and coarse urban air particulate matter. The current knowledge about the microbial communities associated with airborne particulate matter, particularly in urban areas, is limited. This study aims to fill this gap by describing the microbial community associated with coarse (PM10) and fi...

Wells, T.G.; House, M.; Belsha, C.W.; Berry, P.L., 1993: Treatment of pediatric hypertension with isradipine. Clinical Research 41(4): 814A

Ukena, D.; Leutz, M.; Sybrecht, G.W., 1996: Schedule and dose intensified treatment of stage IV non-small cell lung cancer Weekly chemotherapy with paclitaxel and carboplatin. European Respiratory Journal Supplement 9(23): 399S

Headley V.L.; Payne S.M., 1990: Detection of differential protein expression by shigella flexneri in intracellular and extracellular environments by radioimmunoprecipitation. Abstracts of the Annual Meeting of the American Society for Microbiology 90: 118