OCB Science Highlights

OCB Science Highlights

If you would like to have your recent publications featured on the OCB website and eNewsletter please contact ocb_news@whoi.edu. View our guidelines for writing a OCB Science Highlight.

Biological and physical controls on estuarine nitrous oxide emissions

February 5, 2019

Nitrous oxide (N2O) is a potent greenhouse gas with rising atmospheric concentrations. Atmospheric emissions of N2O are predicted to increase with continued anthropogenic perturbation of the nitrogen cycle, yet the magnitude of these emissions is uncertain, particularly in coastal systems where N2O fluxes are poorly constrained. How do N2O emissions from a eutrophic estuary vary […]

Read More

Evidence against an Arctic Ocean methane bomb

February 5, 2019

Gas hydrates are an ice-like storehouse of the greenhouse gas methane found in continental margins of the world ocean. Warming waters can cause hydrates to decompose and release ancient methane to overlying sediment and waters. The continental shelves of the Arctic Ocean have been thought of as “ground zero” for the potential release of methane […]

Read More

Dust-borne iron in the Southern Ocean was more bioavailable during glacial periods

January 23, 2019

The Southern Ocean is iron (Fe)-limited, and increased fluxes of dust-borne Fe to the Southern Ocean during the Last Glacial Maximum (LGM) have been associated with phytoplankton growth and CO2 drawdown. Dust contains different mixes of Fe-bearing minerals, depending on the source region. Fe(II) silicate minerals from physical weathering are more bioavailable than Fe(III) oxyhydroxide […]

Read More

The past, present, and future of artificial ocean iron fertilization experiments

January 23, 2019

Since the beginning of the industrial revolution, human activities have greatly increased atmospheric CO2 concentrations, leading to global warming and indicating an urgent need to reduce global greenhouse gas emissions. The Martin (or iron) hypothesis suggests that ocean iron fertilization (OIF) could be a low-cost effective method for reducing atmospheric CO2 levels by stimulating carbon […]

Read More

Constraints on glacial overturning circulation and export production lead to answers about the carbon cycle

January 4, 2019

One of the biggest unsolved mysteries in climate science concerns the dynamics and feedbacks of the ice age carbon dioxide (CO2) cycle. At the height of the Pleistocene ice ages, the atmospheric CO2 concentration was about 1/3 lower than during the warm interglacial periods. Most scientists think that the CO2 that was missing from the […]

Read More

234Th-based estimates show contrasting patterns of carbon attenuation through oxygen minimum and deficient zones

December 20, 2018

Oxygen minimum zones (OMZs) are thought to be regions of the global ocean where a greater percentage of the organic carbon associated with particles makes it to depth. Currently covering 8% of the world’s ocean area, these low oxygen regions are expected to expand as a result climate change. It is therefore vital to understand […]

Read More

New BioGEOTRACES data sets: Connecting pieces of the microbial biogeochemical puzzle

December 19, 2018

Microorganisms play a central role in the transfer of matter and energy in the marine food web. Microbes depend on micronutrients (e.g. iron, cobalt, zinc, and a host of other trace metals) to catalyze key biogeochemical reactions, and their metabolisms, in turn, directly affect the cycling, speciation, and bioavailability of these compounds. One might therefore […]

Read More

Alternative particle formation pathways identified in the Equatorial Pacific’s biological pump

November 27, 2018

The ocean is one of the largest sinks of atmospheric carbon dioxide (CO2) on our planet, driven in part by CO2 uptake by phytoplankton in the upper ocean during photosynthesis. Eventually, a portion of the resulting organic carbon is transported to depth, where it is sequestered from the atmosphere for centuries or even millennia. Our […]

Read More

Artificial light from sampling platforms changes zooplankton behavior

November 26, 2018

When designing sampling we make generally accepted assumptions that what we collect is representative of what is “normal” or naturally occurring at the place, time, and depth of collection. However, a recent study in Science Advances revealed that this might not be true. During round-the-clock shipboard sampling, lights used at night can actually be a […]

Read More

Efficient carbon drawdown allows for a high future carbon uptake in the North Atlantic

November 7, 2018

As one of the major carbon sinks in the global ocean, the North Atlantic is a key player in mediating and ameliorating the ongoing global warming. Current projections of the North Atlantic carbon sink in a high-CO2 future vary greatly among models, with some showing that a slowdown in carbon uptake has already begun and […]

Read More

Filter by Keyword

acidification air-sea interactions AMOC Antarctica anthropogenic carbon aragonite saturation state arctic argo Atlantic atmospheric CO2 autonomous observing autonomous platforms BATS bcg-argo biogeochemical cycles biogeochemical models biological pump biological uptake bloom blue carbon bottom water calcification California Current System carbon-climate feedback carbon cycle carbon dioxide Caribbean CCS changing marine ecosystems changing ocean chemistry chlorophyll circulation climate change CO2 coastal ocean cobalt community composition conservation cooling effect coral reefs deep convection deep ocean deep sea coral diatoms dimethylsulfide DOC domoic acid dust earth system models eddy Education Ekman transport emissions ENSO enzyme equatorial regions estuarine and coastal carbon fluxes estuary EXPORTS filter feeders filtration rates fish fisheries floats fluid dynamics fluorescence food webs forams geoengineering GEOTRACES glaciers gliders global warming greenhouse gas Greenland Gulf of Maine Gulf of Mexico Gulf Stream gyre harmful algal bloom human impact ice age ice cover iron iron fertilization isotopes katabatic winds kelvin waves kuroshio larvaceans lateral transport lidar ligands mangroves marine boundary layer marine snowfall marshes meltwater mesopelagic mesoscale metagenome metals methane microbes microlayer microorganisms microscale midwater mixed layer mixotrophy modeling mode water formation molecular diffusion NASA net community production new technology nitrogen nitrogen fixation nitrous oxide north atlantic north pacific nutricline nutrient budget nutrient cycling nutrient limitation nutrients ocean-atmosphere ocean acidification ocean carbon uptake and storage ocean color ocean observatories ODZ oligotrophic OMZ open ocean organic particles oxygen paleoceanography particle flux particulate organic carbon pCO2 PDO pH phosphorus photosynthesis physical processes physiology phytoplankton plankton polar regions pollutants primary productivity productivity pteropods radioisotopes remineralization remote sensing residence time respiration rivers Rossby waves Ross Sea ROV salinity salt marsh satellite scale seagrass sea level rise seasonal patterns sediments sensors shelf system ship-based observations sinking particles SOCCOM southern ocean south pacific speciation submesoscale subpolar subtropical subtropical gyres subtropical mode water surface ocean teleconnections temperature thermohaline time-series top predators trace elements trace metals transfer efficiency transient features trophic transfer tropical turbulence twilight zone upper ocean upper water column upwelling US CLIVAR velocity gradient ventilation vertical flux vertical migration vertical transport western boundary currents wetlands winter mixing working group zooplankton