Annie Bourbonnais
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View article: Effects of climate change on river and groundwater nutrient inputs to the coastal ocean
Effects of climate change on river and groundwater nutrient inputs to the coastal ocean Open
Rivers and groundwater are major sources of nutrients to the global coastal ocean. Climate change is expected to impact nutrient fluxes from river basins and coastal aquifers through alterations to both hydrological and nutrient cycling pr…
View article: Multi‐Elemental Tracers in the Amerasian Basin Reveal Interlinked Biogeochemical and Physical Processes in the Arctic Ocean Upper Halocline
Multi‐Elemental Tracers in the Amerasian Basin Reveal Interlinked Biogeochemical and Physical Processes in the Arctic Ocean Upper Halocline Open
The physical and biogeochemical properties of the western Arctic Ocean are rapidly changing, resulting in cascading shifts to the local ecosystems. The nutrient‐rich Pacific water inflow to the Arctic through the Bering Strait is modified …
View article: Dissolved Nitrogen Cycling in the Eastern Canadian Arctic Archipelago and Baffin Bay From Stable Isotopic Data
Dissolved Nitrogen Cycling in the Eastern Canadian Arctic Archipelago and Baffin Bay From Stable Isotopic Data Open
Climate change is expected to alter the input of nitrogen (N) sources in the Eastern Canadian Arctic Archipelago and Baffin Bay due to increased discharge from glacial meltwater and permafrost thaw. Since dissolved inorganic N is generally…
View article: The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia
The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia Open
Despite long-standing interest in the biogeochemistry of the Santa Barbara Basin (SBB), there are no direct rate measurements of different nitrogen transformation processes. We investigated benthic nitrogen cycling using in situ incubation…
View article: A model for community-driven development of best practices: the Ocean Observatories Initiative Biogeochemical Sensor Data Best Practices and User Guide
A model for community-driven development of best practices: the Ocean Observatories Initiative Biogeochemical Sensor Data Best Practices and User Guide Open
The field of oceanography is transitioning from data-poor to data-rich, thanks in part to increased deployment of in-situ platforms and sensors, such as those that instrument the US-funded Ocean Observatories Initiative (OOI). However, gen…
View article: Use of an Autonomous Surface Vehicle to Collect High Spatial Resolution Water Quality Data at Lake Wateree, SC
Use of an Autonomous Surface Vehicle to Collect High Spatial Resolution Water Quality Data at Lake Wateree, SC Open
Freshwater resources including lakes and reservoirs are increasingly threatened by harmful cyanobacterial blooms (HCBs). The scarcity of high spatial and temporal resolution data presents challenges for monitoring, predicting, and managing…
View article: Editorial: Recent developments in oxygen minimum zones biogeochemistry
Editorial: Recent developments in oxygen minimum zones biogeochemistry Open
EDITORIAL article Front. Mar. Sci., 05 December 2023Sec. Marine Biogeochemistry Volume 10 - 2023 | https://doi.org/10.3389/fmars.2023.1333731
View article: Dissolved Nitrogen Cycling in The Eastern Canadian Arctic Archipelago and Baffin Bay from Stable Isotopic Data
Dissolved Nitrogen Cycling in The Eastern Canadian Arctic Archipelago and Baffin Bay from Stable Isotopic Data Open
Climate change is expected to alter the input of nitrogen (N) sources in the Eastern Canadian Arctic Archipelago (ECAA) and Baffin Bay due to increased discharge from glacial meltwater and permafrost thaw. Since dissolved inorganic N is ge…
View article: The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia
The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia Open
Despite long-standing interests in the biogeochemistry of the Santa Barbara Basin (SBB), there are no direct rate measurements of different nitrogen transformation processes. We investigated benthic nitrogen cycling using in-situ incubatio…
View article: Supplementary material to "The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia"
Supplementary material to "The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia" Open
Figure S1.Nitrate (NO3 -) concentrations in benthic flux chambers with 15 NO3 -additions.
View article: Marine N2O cycling from high spatial resolution concentration, stable isotopic and isotopomer measurements along a meridional transect in the eastern Pacific Ocean
Marine N2O cycling from high spatial resolution concentration, stable isotopic and isotopomer measurements along a meridional transect in the eastern Pacific Ocean Open
Nitrous oxide (N 2 O) is a potent greenhouse gas and ozone depleting substance, with the ocean accounting for about one third of global emissions. In marine environments, a significant amount of N 2 O is produced by biological processes in…
View article: Nitrous oxide production and isotopomer composition by fungi isolated from salt marsh sediments
Nitrous oxide production and isotopomer composition by fungi isolated from salt marsh sediments Open
The emissions of nitrous oxide (N 2 O), a potent greenhouse gas and ozone-depleting agent, have been steadily increasing from coastal environments, such as salt marsh sediments, as a result of anthropogenic nutrient loading. Biotic process…
View article: Pathways of Nitrous Oxide Production in the Eastern Tropical South Pacific Oxygen Minimum Zone
Pathways of Nitrous Oxide Production in the Eastern Tropical South Pacific Oxygen Minimum Zone Open
Oceanic emissions of nitrous oxide (N2O) account for roughly one-third of all natural sources to the atmosphere. Hot-spots of N2O outgassing occur over oxygen minimum zones (OMZs), where the presence of steep oxygen gradients surrounding a…
View article: Nitrous Oxide Dynamics in the Southern Benguela Upwelling System
Nitrous Oxide Dynamics in the Southern Benguela Upwelling System Open
St Helena Bay in the southern Benguela upwelling system (SBUS) is characterized by seasonal upwelling, water mass and nutrient retention, and persistent cyclonic circulation that limits oxygen exchange, creating ideal conditions for subsur…
View article: Controls on surface distributions of dissolved organic carbon and nitrogen in the southeast Pacific Ocean
Controls on surface distributions of dissolved organic carbon and nitrogen in the southeast Pacific Ocean Open
Here we use data from three meridional survey cruises that took place in 1994, 2007/2008 and 2016/2017 in the southeast Pacific Ocean to investigate controls on surface distributions of dissolved organic carbon and nitrogen (DOC and DON, r…
View article: ΔO2/N2′ as a New Tracer of Marine Net Community Production: Application and Evaluation in the Subarctic Northeast Pacific and Canadian Arctic Ocean
ΔO2/N2′ as a New Tracer of Marine Net Community Production: Application and Evaluation in the Subarctic Northeast Pacific and Canadian Arctic Ocean Open
We compared field measurements of the biological O 2 saturation anomalies, ΔO 2 /Ar and ΔO 2 /N 2 , from simultaneous oceanographic deployments of a membrane inlet mass spectrometer and optode/gas tension device (GTD). Data from the Subarc…
View article: Protocols for Assessing Transformation Rates of Nitrous Oxide in the Water Column
Protocols for Assessing Transformation Rates of Nitrous Oxide in the Water Column Open
Nitrous oxide (N 2 O) is a potent greenhouse gas and an ozone destroying substance. Yet, clear step-by-step protocols to measure N 2 O transformation rates in freshwater and marine environments are still lacking, challenging inter-comparab…
View article: Comment on bg-2021-6
Comment on bg-2021-6 Open
Abstract. Upwelling of nutrient-rich deep waters make eastern boundary upwelling systems (EBUSs), such as the Humboldt Current system, hot spots of marine productivity. Associated settling of organic matter to depth and consecutive aerobic…
View article: Compilation of nitrate δ15N in the ocean
Compilation of nitrate δ15N in the ocean Open
The database for nitrate concentrations and nitrate δ15N includes new data and most of the measurements that have been published to date. This database also includes most of the nitrate δ15N measurements in the database of Rafter et al. (2…
View article: Subsea permafrost carbon stocks and climate change sensitivity estimated by expert assessment
Subsea permafrost carbon stocks and climate change sensitivity estimated by expert assessment Open
The continental shelves of the Arctic Ocean and surrounding seas contain large stocks of organic matter (OM) and methane (CH 4 ), representing a potential ecosystem feedback to climate change not included in international climate agreement…
View article: Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment
Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment Open
In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics – namely production, consumption, and net emissions – is required for all biomes, especially those ecosystems most susceptible to the im…
View article: Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment
Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment Open
In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics – namely production, consumption and net emissions – is required for all biomes, especially those ecosystems most susceptible to the imp…
View article: A critical review of the <sup>15</sup>N<sub>2</sub> tracer method to measure diazotrophic production in pelagic ecosystems
A critical review of the <sup>15</sup>N<sub>2</sub> tracer method to measure diazotrophic production in pelagic ecosystems Open
Dinitrogen (N 2 ) fixation is an important source of biologically reactive nitrogen (N) to the global ocean. The magnitude of this flux, however, remains uncertain, in part because N 2 fixation rates have been estimated following divergent…
View article: Analysis of dissolved 15N2 gas standards by Membrane Inlet Mass Spectrometry
Analysis of dissolved 15N2 gas standards by Membrane Inlet Mass Spectrometry Open
In order to verify that measurements of the 15N2 atom% of dissolved N2 gas samples effectuated by Membrane Inlet Mass Spectrometry are accurate, we developed a specific protocol to prepare dissolved 15N2 gas standards.We detail the protoco…
View article: Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium
Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium Open
In order to verify that measurements of the 15N2 atom% of dissolved N2 gas samples effectuated by Membrane Inlet Mass Spectrometry are accurate, we compared these to corresponding measurements of parallel samples on a Delta V Isotope Ratio…