Small phytoplankton drive high summertime carbon and nutrient export in the Gulf of California and Eastern Tropical North Pacific

Puigcorbé, Viena; Benitez-Nelson, Claudia R.; Masqué, Pere; Verdeny, E.; White, Angelicque E.; Popp, Brian N.; Prahl, Fredrick G.; Lam, Phoebe J.

doi:10.1002/2015gb005134

Cited by 64 publications

(77 citation statements)

References 140 publications

(214 reference statements)

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“…It has been shown recently that the performance of the Siegel et al (2014) export flux model improves substantially if the parameters are regionally tuned supporting the importance of food web structure (Stukel et al, 2015). Further, recent field data summaries show strong relationships between the vertical scales of sinking flux attenuation in the TZ and both phytoplankton community structure in the EZ (Guidi et al, 2015;Puigcorbé et al, 2015) and environmental conditions in the TZ (Marsay et al, 2015). The explicit testing of the hypothesis and development of modeling tools to diagnose carbon cycling processes will require an extensive data set of a wide range of ECC states.…”

Section: Carbon Export From the Euphotic Zone And Its Fate Within Thementioning

confidence: 95%

Prediction of the Export and Fate of Global Ocean Net Primary Production: The EXPORTS Science Plan

et al. 2016

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Ocean ecosystems play a critical role in the Earth's carbon cycle and the quantification of their impacts for both present conditions and for predictions into the future remains one of the greatest challenges in oceanography. The goal of the EXport Processes in the Ocean from Remote Sensing (EXPORTS) Science Plan is to develop a predictive understanding of the export and fate of global ocean net primary production (NPP) and its implications for present and future climates. The achievement of this goal requires a quantification of the mechanisms that control the export of carbon from the euphotic zone as well as its fate in the underlying "twilight zone" where some fraction of exported carbon will be sequestered in the ocean's interior on time scales of months to millennia. Here we present a measurement/synthesis/modeling framework aimed at quantifying the fates of upper ocean NPP and its impacts on the global carbon cycle based upon the EXPORTS Science Plan. The proposed approach will diagnose relationships among the ecological, biogeochemical, and physical oceanographic processes that control carbon cycling across a range of ecosystem and carbon cycling states leading to advances in satellite diagnostic and numerical prognostic models. To collect these data, a combination of ship and robotic field sampling, satellite remote sensing, and numerical modeling is proposed which enables the sampling of the many pathways of NPP export and fates. This coordinated, process-oriented approach has the potential to foster new insights on ocean carbon cycling that maximizes its societal relevance through the achievement of research goals of many international research agencies and will be a key step toward our understanding of the Earth as an integrated system.

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Section: Carbon Export From the Euphotic Zone And Its Fate Within Thementioning

confidence: 95%

Prediction of the Export and Fate of Global Ocean Net Primary Production: The EXPORTS Science Plan

et al. 2016

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“…Recent sediment trap work has suggested that smaller, slow sinking particles could contribute to the overall flux in oligotrophic regions (Durkin et al, 2015;Hung et al, 2012;Puigcorbé et al, 2015). A previous study in the northwestern Pacific also showed elevated Mn in subsurface traps that could have resulted from small, slow sinking…”

Section: On the Use Of Large Versus Small Particle E: 234 Thmentioning

confidence: 96%

An investigation of basin-scale controls on upper ocean export and remineralization

Black¹

2018

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The biological carbon pump (BCP) helps to moderate atmospheric carbon dioxide levels by bringing carbon to the deep ocean, where it can be sequestered on timescales of centuries to millennia. Climate change is predicted to decrease the efficiency of the global BCP, however, the magnitude and timescale of this shift is largely uncertain and will likely impact some areas of the global ocean more significantly than others. Therefore, it is imperative that we (1) accurately quantify surface export and remineralization of particulate organic carbon (POC) via the BCP over large regions of the global ocean, (2) examine the factors controlling these POC fluxes and their variability, which includes the cycling of biologically-relevant trace metals, and (3) establish if and how the BCP is changing over time.This thesis focuses on addressing various aspects of these objectives using the 234 Th-238 U method across basin-scale GEOTRACES transects. First, the export and remineralization of POC were examined across large gradients in productivity, upwelling, community structure, and dissolved oxygen in the southeastern tropical Pacific Ocean. Although low oxygen zones are traditionally thought to have decreased POC flux attenuation relative to other regions of the global ocean and the low oxygen Pacific locations followed this pattern, regions that were functionally anoxic had enhanced attenuation in the upper 400 m. Second, trace metal export and remineralization were quantified across the Pacific transect. Because many trace metals are necessary for the metabolic functions of marine organisms and can co-limit marine productivity, the controls on the cycling of trace metals in the upper ocean were examined. Lastly, POC export was determined across two transects in the Western Arctic Ocean, where light and nutrient availability drive the biological pump. Upper ocean export estimates in the central basin did not reflect a substantial change in the biological pump compared to studies from the last three decades, however, an extensive maximum in 234 Th relative to 238 U deeper in the water column indicated that rapid vertical transport had occurred, which could suggest a more efficient biological pump in the Arctic Ocean.

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“…Zooplankton, phytoplankton and high nutrient levels also reduce POC/PON in coastal waters (Koeve, 2006;Martiny et al, 2013b;Watanabe and Kuwae, 2015;Talmy et al, 2016). The relatively high POC/PON ratio in offshore water is primary caused by small phytoplankton, which is the dominant contributor to POC levels at the ocean surface and has a high POC/PON ratio (Richardson and Jackson, 2007;Puigcorbé et al, 2015). The increase of POC/PON with the distance is very significant in the North Table S4.…”

Section: Variations In Poc Pon and Poc/pon With Offshore Distancementioning

confidence: 99%

Variation pattern of particulate organic carbon and nitrogen in oceans and inland waters

Huang¹,

Ye²,

Hao³

et al. 2017

Preprint

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Small phytoplankton drive high summertime carbon and nutrient export in the Gulf of California and Eastern Tropical North Pacific

Cited by 64 publications

References 140 publications

Prediction of the Export and Fate of Global Ocean Net Primary Production: The EXPORTS Science Plan

Prediction of the Export and Fate of Global Ocean Net Primary Production: The EXPORTS Science Plan

An investigation of basin-scale controls on upper ocean export and remineralization

Variation pattern of particulate organic carbon and nitrogen in oceans and inland waters

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