Impacts of Atmospheric Anthropogenic Nitrogen on the Open Ocean

  title={Impacts of Atmospheric Anthropogenic Nitrogen on the Open Ocean},
  author={Robert A. Duce and Julie LaRoche and Katye E. Altieri and Kevin Robert Arrigo and Alex R. Baker and Douglas G. Capone and Sarah E. Cornell and Frank J. Dentener and James N. Galloway and Raja S. Ganeshram and Richard J Geider and Tim D. Jickells and Marcel M M Kuypers and Rebecca J. Langlois and Peter S. Liss and S. M. Liu and Jack J. Middelburg and C. Mark Moore and Slobodan Nickovic and Andreas Oschlies and Thorvald Pedersen and Joseph M. Prospero and Reiner Schlitzer and Sybil P. Seitzinger and Lise Lotte S{\o}rensen and Mitsuo Uematsu and Osvaldo Ulloa and Max Voss and Bess B. Ward and Lauren M. Zamora},
  pages={893 - 897}
Increasing quantities of atmospheric anthropogenic fixed nitrogen entering the open ocean could account for up to about a third of the ocean's external (nonrecycled) nitrogen supply and up to ∼3% of the annual new marine biological production, ∼0.3 petagram of carbon per year. This input could account for the production of up to ∼1.6 teragrams of nitrous oxide (N2O) per year. Although ∼10% of the ocean's drawdown of atmospheric anthropogenic carbon dioxide may result from this atmospheric… 

Marine Nitrogen and Climate Change

The three primary routes for entry of reactive nitrogen into the marine environment are in run-off from the land1, as deposition from the atmosphere2, and via nitrogen-fixing microbes, such as the

A reevaluation of the magnitude and impacts of anthropogenic atmospheric nitrogen inputs on the ocean

We report a new synthesis of best estimates of the inputs of fixed nitrogen to the world ocean via atmospheric deposition and compare this to fluvial inputs and dinitrogen fixation. We evaluate the

The anthropogenic perturbation of the marine nitrogen cycle by atmospheric deposition: Nitrogen cycle feedbacks and the 15N Haber‐Bosch effect

Over the last 100 years, anthropogenic emissions have led to a strong increase of atmospheric nitrogen deposition over the ocean, yet the resulting impacts and feedbacks are neither well understood

Quantifying the impact of anthropogenic nitrogen deposition on oceanic nitrous oxide

Anthropogenically induced increases in nitrogen deposition to the ocean can stimulate marine productivity and oceanic emission of nitrous oxide. We present the first global ocean model assessment of

Increasing anthropogenic nitrogen in the North Pacific Ocean

This anthropogenically driven increase in the N content of the upper NPO may enhance primary production in this N-limited region, potentially leading to a long-term change of the NPO from being N- limited to P-limited.

The marine nitrogen cycle: recent discoveries, uncertainties and the potential relevance of climate change

A nitrogen budget for the coastal and open ocean, where inputs and outputs match rather well, is presented and predicted climate change will impact the expansion of the oceans' oxygen minimum zones, the productivity of surface waters and presumably other microbial processes, with unpredictable consequences for the cycling of nitrogen.

Impact of atmospheric and terrestrial CO2 feedbacks on fertilization-induced marine carbon uptake

The sensitivity of oceanic CO2 uptake to alterations in the marine biological carbon pump, such as brought about by natural or purposeful ocean fertilization, has repeatedly been investigated by

Impact of atmospheric nitrogen deposition on phytoplankton productivity in the South China Sea

The impacts of anthropogenic nitrogen (N) deposition on the marine N cycle are only now being revealed, but the magnitudes of those impacts are largely unknown in time and space. The South China Sea

Natural forcing of the North Atlantic nitrogen cycle in the Anthropocene

An ∼130-year-long record of the 15N/14N of skeleton-bound organic matter in a coral from the outer reef of Bermuda provides a test of the hypothesis that anthropogenic atmospheric nitrogen has significantly augmented the nitrogen supply to the open North Atlantic surface ocean.

Contribution of atmospheric nitrogen deposition to new production in the nitrogen limited photic zone of the northern Indian Ocean

[1] Primary productivity in the sunlit surface layers of tropical oceans is mostly limited by the supply of reactive nitrogen (Nr) through upwelling, N2 fixation by diazotrophs, riverine flux and



The role of air-sea exchange in the marine nitrogen cycle

Abstract. This contribution to the Spot-On volume considers the magnitude and composition of atmospheric nitrogen inputs to the oceans and then goes on to consider the impacts of these inputs.

Effects of patchy ocean fertilization on atmospheric carbon dioxide and biological production

Increasing oceanic productivity by fertilizing nutrient‐rich regions with iron has been proposed as a mechanism to offset anthropogenic emissions of carbon dioxide. Earlier studies examined the

Atmospheric deposition of nutrients to the North Atlantic Basin.

Atmospheric chemical models are used to estimate the deposition rate of various inorganic oxides of nitrogen (NOy), reduced nitrogen species (NHx) and mineral dust to the North Atlantic Ocean (NAO).

Atmospheric deposition of nutrients to the Atlantic Ocean

The role of atmospheric deposition of iron, nitrogen and phosphorus in supplying nutrients to marine systems has been described, individually, in previous works. Here we examine atmospheric dry

Impact of anthropogenic atmospheric nitrogen and sulfur deposition on ocean acidification and the inorganic carbon system

The alterations in surface water chemistry from anthropogenic nitrogen and sulfur deposition are a few percent of the acidification and DIC increases due to the oceanic uptake of anthropogenic CO2, however, the impacts are more substantial in coastal waters, where the ecosystem responses to ocean acidification could have the most severe implications for mankind.

The atmospheric input of trace species to the world ocean

Over the past decade it has become apparent that the atmosphere is a significant pathway for the transport of many natural and pollutant materials from the continents to the ocean. The atmospheric

Climate-driven trends in contemporary ocean productivity

Global ocean NPP changes detected from space over the past decade are described, dominated by an initial increase in NPP of 1,930 teragrams of carbon a year, followed by a prolonged decrease averaging 190 Tg C yr-1.

Spatial coupling of nitrogen inputs and losses in the ocean

It is concluded that oceanic nitrogen fixation is closely tied to the generation of nitrogen-deficient waters in denitrification zones, supporting the view that nitrogen fixation stabilizes the oceanic inventory of fixed nitrogen over time.

Enhanced biological carbon consumption in a high CO2 ocean

It is shown that dissolved inorganic carbon consumption of a natural plankton community maintained in mesocosm enclosures at initial CO2 partial pressures increases with rising CO2, and the observed responses have implications for a variety of marine biological and biogeochemical processes, and underscore the importance of biologically driven feedbacks in the ocean to global change.

Enhancement of marine primary production by nitrogen-enriched acid rain

The effect of acid rain on the pH of freshwater habitats is well known1. The acidity of rainwater is largely due to hydrated oxides of sulphur, nitrogen and carbon2, which also constitute nutrients