High-resolution biological net community production in the Pacific-influenced Arctic as constrained by O2/Ar and O2/N2 observations

Cynar, Haley; Juranek, L. W.; Mordy, Calvin W.; Strausz, David; Bell, Shaun W.

doi:10.1016/j.dsr2.2022.105214

Cited by 5 publications

(2 citation statements)

References 69 publications

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“…During the cruise, we compared oxygen measurements taken from the ship's seawater line against surface bottle samples to evaluate any potential discrepancies resulting from the ship's sampling system (Figure 2a; Izzet and Tortell, 2021;Cynar et al, 2022;Izett et al, 2022). This was done using Winkler titrations (Culberson, 1991;Dickson, 1994) of triplicate samples taken from the inline system and from a Niskin bottle at 3 m, which is the same depth as the seawater b a intake location on the hull.…”

Section: Deploymentmentioning

confidence: 99%

Design Update to “The Pressure of In-Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O2 and N2 in Surface Ocean Waters”

Lowin,

Izett,

Taylor

et al. 2024

Oceanog

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Measuring net community production (NCP) is a challenging, yet important, aspect of oceanography. Methods based on discrete sample collection often have low spatial and temporal resolution, while expensive instruments are required to obtain continuous NCP measurements at high resolution. To address these issues, Izett and Tortell (2020) created a novel, autonomous system called the Pressure of In-situ Gases Instrument (PIGI) and shared their design with the community. The system yields high-resolution surface water O2 and N2 measurements that are used to estimate NCP along a ship transect or at a fixed field station. This article provides a description of an updated PIGI system that was tested in a series of cruises in the coastal South Atlantic Bight (SAB). The data collected suggest that it performs equally as well as the original, providing high spatial resolution NCP measurements. Unfortunately, we believe that the SAB coastal and estuaries violate the steady state assumption due to horizontal mixing driven by tidal forces. Thus, we cannot recommend the PIGI system for use in the coastal SAB, but we encourage its use in open ocean waters that do not violate the assumptions on which this system was built. We document the updates to the PIGI system, share tips and tricks on its use, and discuss the data collected.

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Section: Deploymentmentioning

confidence: 99%

Design Update to “The Pressure of In-Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O2 and N2 in Surface Ocean Waters”

Lowin,

Izett,

Taylor

et al. 2024

Oceanog

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“…Various approaches are used to calculate NCP, including in vitro incubation experiments and geochemical mass-balance methods that measure temporal changes in the parameters related to biological activity, such as oxygen (Sarma, 2004;Teeter et al, 2018;Cynar et al, 2022) and various forms of carbon, nitrogen, and phosphorus (Green and Sambrotto, 2006;Emerson, 2014;Yang et al, 2018). However, environmental factors can affect these measurements, such as dissolved inorganic carbon (DIC) in seawater, which is influenced by sea ice melting, river input, vertical mixing, and remineralization (Mathis et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Research progress in calculating net community production of marine ecosystem by remote sensing

Wang

Bai

et al. 2023

Front. Mar. Sci.

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Net community production (NCP) is defined as the difference between gross primary production (GPP) and total community respiration (R). NCP indicates the balance between the production and consumption of community organic carbon, therefore making it a key parameter for evaluating the efficiency of carbon sequestration using the biological pump (BP). It is difficult to quantify NCP directly via satellite, because there are complex processes in community production and respiration. We reviewed previous research on satellite-based NCP and classified the methods into two primary categories: empirical methods and semi-analytical methods. The former category was established based on numerical relationships between NCP and satellite-based proxies, while the latter was developed by utilizing mechanistic analysis to establish quantitative expressions linking NCP to such proxies. Although satellite-based calculations of NCP have been attempted, they still suffer from significant uncertainties. Future research should focus on the precise calculation of satellite-based NCP by investigating the underlying processes and mechanisms that regulate NCP, developing regional models, and increasing the resolution of satellite sensors, as well as applying satellite lidar and coordinated multi-sensor observation technology.

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Air-sea gas exchange and marine gases

Stanley,

Bell

2025

Treatise on Geochemistry

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High-resolution biological net community production in the Pacific-influenced Arctic as constrained by O2/Ar and O2/N2 observations

Cited by 5 publications

References 69 publications

Design Update to “The Pressure of In-Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O2 and N2 in Surface Ocean Waters”

Design Update to “The Pressure of In-Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O2 and N2 in Surface Ocean Waters”

Research progress in calculating net community production of marine ecosystem by remote sensing

Air-sea gas exchange and marine gases

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