Backscatter Estimation Using ADCPs - Twenty Years Later

Mullison, J.

doi:10.1109/cwtm43797.2019.8955274

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…Based on the ADCP data, the biological distribution can be assessed by calculating the acoustic scatter strength (S v ), which was used to determine the existence of the DSL (RDI, 1996;Maclennan et al, 2002;Mullison, 2017):…”

Section: Calculation Of Acoustic Scattering Intensitymentioning

confidence: 99%

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Intraseasonal variability of the deep scattering layer induced by mesoscale eddy

Wang,

Yu,

Wang

et al. 2024

Front. Mar. Sci.

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The deep scattering layer (DSL), a stratum of the marine diel vertical migration (DVM) organisms inhabiting the mesopelagic ocean, plays a crucial role in transporting carbon and nutrients from the surface to depth through the migration of its organisms. Using 18 months of in-situ observations and altimeter sea level data, we reveal for the first time the intraseasonal variations and underlying mechanisms of the DSL and the DVM to the east of the Taiwan Island. Substantial vertical speeds acquired from the Acoustic Doppler Current Profiler were used to examine the distribution and variation of the DVM. Innovatively, the results for the power spectrum analysis of the scattering intensity demonstrated a significant intraseasonal variability (ISV) with an 80-day period in the DSL. Furthermore, the variation in the DVM was closely linked to the DSL and showed an 80-day ISV during the observation. A dynamic relationship between the ISV of the DSL east of Taiwan Island and the westward-propagating mesoscale eddies was established. Anticyclonic (cyclonic) eddy movement toward Taiwan Island triggers downward (upward) bending of the local isotherms, resulting in a layer of DSL warming (cooling) and subsequent upper boundary layer deepening (rising). These findings underscore the substantial influence of mesoscale eddies on biological activity in the mesopelagic ocean, establishing a novel understanding of ISV dynamics in the DSL and their links to eddy-induced processes.

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Section: Calculation Of Acoustic Scattering Intensitymentioning

confidence: 99%

“…The parameters are based on the technical specifications for the 75 kHz ADCP provided in Deines (1999) and Mullison (2017).…”

Section: Calculation Of Acoustic Scattering Intensitymentioning

confidence: 99%

Intraseasonal variability of the deep scattering layer induced by mesoscale eddy

Wang,

Yu,

Wang

et al. 2024

Front. Mar. Sci.

View full text Add to dashboard Cite

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“…Based on the ADCP data, the biological distribution can be assessed by calculating the acoustic scatter strength (Sv) (Mullison, 2017), which is used to determine the existence of DSL (Maclennan, 2002). The Sv is calculated as follow,…”

Section: Calculation Of Acoustic Scattering Intensitymentioning

confidence: 99%

Intraseasonal variability of the Deep Scattering Layer observed by subsurface mooring deployed east of Taiwan Island

WANG,

YU,

WANG

et al. 2023

Preprint

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The Deep Scattering Layer (DSL), a stratum of marine Diel Vertical Migration (DVM) organisms inhabiting the mesopelagic ocean, plays a crucial role in transporting carbon and nutrients from the surface to depth through the migration of its organisms. Here, using 18 months in-situ observations and altimeter sea level data, we observed for the first time the intraseasonal variation of the DSL and the DVM of zooplankton and micronekton to the east of the Taiwan Island, and revealed the underlying dynamics. The vertical speeds returned from the Acoustic Doppler Current Profiler are used to investigate the distribution and variation of the DVM innovatively. Results of power spectrum analysis of the scattering intensity indicate that the DSL exhibits a significant intraseasonal variability (ISV) with an 80-day period. Simultaneously, the variation of the DVM is linked to the DSL, and also shows an 80-day ISV during the observation. Dynamically, the ISV of the DSL to the east of the Taiwan Island is correlated with the westward-propagating mesoscale eddies. When anticyclonic (cyclonic) eddies move towards the Taiwan Island, the local isotherms bend downward (upward), resulting in warming (cooling) in the DSL, and thus the upper boundary layer of the DSL gradually deepens (rises). These findings highlight the significant influence of mesoscale eddies on biological activity in the mesopelagic ocean.

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“…;Gostiaux and van Haren (2010);Mullison (2019);Behrenfeld et al (2019);Dwinovantyo et al (2019);Tanaka et al (2021)]. Through calibration of Sv with in-situ plankton observations (e.g., imaging), ADCPs produce quantitative estimates of biomass that can be related across vessels and over time.…”

mentioning

confidence: 99%

Recommendations for Plankton Measurements on OceanSITES Moorings With Relevance to Other Observing Sites

et al. 2022

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Measuring plankton and associated variables as part of ocean time-series stations has the potential to revolutionize our understanding of ocean biology and ecology and their ties to ocean biogeochemistry. It will open temporal scales (e.g., resolving diel cycles) not typically sampled as a function of depth. In this review we motivate the addition of biological measurements to time-series sites by detailing science questions they could help address, reviewing existing technology that could be deployed, and providing examples of time-series sites already deploying some of those technologies. We consider here the opportunities that exist through global coordination within the OceanSITES network for long-term (climate) time series station in the open ocean. Especially with respect to data management, global solutions are needed as these are critical to maximize the utility of such data. We conclude by providing recommendations for an implementation plan.

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Backscatter Estimation Using ADCPs - Twenty Years Later

Cited by 3 publications

References 11 publications

Intraseasonal variability of the deep scattering layer induced by mesoscale eddy

Intraseasonal variability of the deep scattering layer induced by mesoscale eddy

Intraseasonal variability of the Deep Scattering Layer observed by subsurface mooring deployed east of Taiwan Island

Recommendations for Plankton Measurements on OceanSITES Moorings With Relevance to Other Observing Sites

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