Primary production and carbon export rates across the subpolar N. Atlantic Ocean basin based on triple oxygen isotope and dissolved O2and Ar gas measurements

Abstract. Deep-sea bamboo corals (order Gorgonacea, family Isididae) are known to record changes in water mass chemistry over decades to centuries. These corals are composed of a two-part skeleton of calcite internodes segmented by gorgonin organic nodes. We examine the spatial variability of bamboo coral organic node 13C/12C and 15N/14N from thirteen bamboo coral specimens sampled along the California margin (37–32° N; 792 to 2136 m depth). Radiocarbon analyses of the organic nodes show the presence of the anthropogenic bomb spike, indicating the corals utilize a surface-derived food source (pre-bomb D14C values of ∼ −100‰, post-bomb values to 82‰). Carbon and nitrogen isotope data from the organic nodes (13C = −15.9‰ to −19.2‰ 15N = 13.8‰ to 19.4‰) suggest selective feeding on surface-derived organic matter or zooplankton. A strong relationship between coral 15N and habitat depth indicate a potential archive of changing carbon export, with decreased 15N values reflecting reduced microbial degradation (increased carbon flux) at shallower depths. Using four multi-centennial length coral records, we interpret long-term 15N stability in the California Current. Organic node 13C values record differences in carbon isotope fractionation dictated by nearshore vs. offshore primary production. These findings imply strong coupling between primary production, pelagic food webs, and deep-sea benthic communities.

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Size-fractionated primary production and nitrogen uptake during a North Atlantic phytoplankton bloom: implications for carbon export estimates

Deep Sea Research Part I Oceanographic Research Papers ◽

10.1016/s0967-0637(00)00066-2 ◽

2001 ◽

Vol 48 (3) ◽

pp. 689-720 ◽

Cited By ~ 56

Author(s):

S.J Bury ◽

P.W Boyd ◽

T Preston ◽

G Savidge ◽

N.J.P Owens

Keyword(s):

Primary Production ◽

North Atlantic ◽

Nitrogen Uptake ◽

Phytoplankton Bloom ◽

Carbon Export

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Seismic stratigraphy of Cretaceous eastern Central Atlantic Ocean: Basin evolution and palaeoceanographic implications

Earth and Planetary Science Letters ◽

10.1016/j.epsl.2018.07.023 ◽

2018 ◽

Vol 499 ◽

pp. 107-121 ◽

Cited By ~ 2

Author(s):

Yannick Mourlot ◽

Gérôme Calvès ◽

Peter D. Clift ◽

Guillaume Baby ◽

Anne-Claire Chaboureau ◽

...

Keyword(s):

Atlantic Ocean ◽

Seismic Stratigraphy ◽

Ocean Basin ◽

Basin Evolution ◽

Central Atlantic

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Changes in phytoplankton concentration now drive increased Arctic Ocean primary production

Science ◽

10.1126/science.aay8380 ◽

2020 ◽

Vol 369 (6500) ◽

pp. 198-202 ◽

Cited By ~ 18

Author(s):

K. M. Lewis ◽

G. L. van Dijken ◽

K. R. Arrigo

Keyword(s):

Sea Ice ◽

Primary Production ◽

Arctic Ocean ◽

Open Water ◽

Water Area ◽

The Arctic ◽

Carbon Export ◽

Phytoplankton Primary Production ◽

Open Water Area ◽

The Arctic Ocean

Historically, sea ice loss in the Arctic Ocean has promoted increased phytoplankton primary production because of the greater open water area and a longer growing season. However, debate remains about whether primary production will continue to rise should sea ice decline further. Using an ocean color algorithm parameterized for the Arctic Ocean, we show that primary production increased by 57% between 1998 and 2018. Surprisingly, whereas increases were due to widespread sea ice loss during the first decade, the subsequent rise in primary production was driven primarily by increased phytoplankton biomass, which was likely sustained by an influx of new nutrients. This suggests a future Arctic Ocean that can support higher trophic-level production and additional carbon export.

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Primary production and chlorophyll distributions in the subtropical and tropical waters of the Atlantic Ocean in the autumn of 2002

Oceanology ◽

10.1134/s0001437007030113 ◽

2007 ◽

Vol 47 (3) ◽

pp. 386-399 ◽

Cited By ~ 4

Author(s):

V. I. Vedernikov ◽

V. I. Gagarin ◽

A. B. Demidov ◽

V. I. Burenkov ◽

P. A. Stunzhas

Keyword(s):

Atlantic Ocean ◽

Primary Production ◽

Tropical Waters

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The Atlantic Ocean Basin

10.1093/oxfordhb/9780199235810.013.0030 ◽

2012 ◽

Author(s):

Alan L. Karras

Keyword(s):

Political Economy ◽

Atlantic Ocean ◽

Atlantic World ◽

Ocean Basin ◽

Atlantic History ◽

Modern World ◽

The Past ◽

Single Entity ◽

The World ◽

Past Experiences

This article argues that historians ought to have two main goals: reconstructing the past in a way that demonstrates how those who lived life in times before our own understood and interacted with the world that they inhabited and ascribing meaning to these past experiences so that they are relevant to those in the present. Atlantic history, at least for the last few decades, has held out tremendous potential for modern world historians. This article describes expanding time and integrating space by considering the Atlantic world as a single entity from the time that the four continents bordering the Atlantic Ocean became linked though exploration. It also discusses community, migration, and the need for political economy; and globalizing Atlantic history.

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