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Highlights include enriched and related content of notable journal articles presented on Eos org AGU org AGU On Demand and in AGU journals

Oceans May Produce Twice as Much Organic Matter as Usually Measured

Sarah Witman, Freelance Writer

From Research Spotlights— Researchers study how oceans respire carbon, reexamining a critical part of the global carbon cycle.  The world’s oceans are one of the biggest carbon pools, or sinks, in the global carbon cycle. Some of this carbon (about 1,000 gigatons) is stored near the ocean’s.... more

New Evidence Challenges Prevailing Views on Marine Carbon Flux

Sarah Stanley, Freelance Writer

From Research Spotlights— Small, slow-sinking organic particles may play a bigger role than previously thought in the transport of carbon below the surface ocean.  Earth’s oceans play a major role in limiting the concentration of carbon dioxide in the atmosphere. Carbon dioxide dissolves in.... more

New Baseline for Understanding Arctic Oxygen and Nutrient Fluxes

Terri Cook, Freelance Writer

From Research Spotlights— Significant spatial and temporal patterns emerge from the first pan-Arctic comparison of oxygen demand in marine sediments.  The breakdown of organic matter in marine sediments is a crucial ecosystem function that liberates energy and recycles biologically important.... more

New statistical model emphasizes role of spatial correlation

Editor’s Highlight—   This paper presents a statistical methodology to assess uncertainties in ocean chlorophyll trends. It provides strong evidence that significant differences exist in regional and global trends when compared with linear temporal models that have been widely used in other work. This.... more

Impacts of ENSO on air-sea oxygen exchange: observations and mechanisms

Editors’ Highlights­­— The exchange of oxygen between the air and sea reflects the physical and biogeochemical processes of the ocean and their interactions. Our understanding of the responses of the above-ocean processes to climate change could be improved with insights into the inter-annual variability.... more

Seasonal and spatial variability in northern Gulf of Alaska surface-water iron concentrations driven by shelf sediment resuspension, glacial meltwater, a Yakutat eddy, and dust

Editors' Highlight— This paper examines the transfer of iron (Fe) from shelf to ocean in a high latitude environment. It is based on data collected from three research cruises in the northern Gulf of Alaska along a transect from the mouth of the Copper River to beyond the shelf break. The authors discuss.... more

Strong biotic influences on regional patterns of climate regulation services

Editor's Highlights—   A number of biogeochemical fluxes – from carbon sequestration to water balance – are also ecosystem services. This paper links the two in an assessment of the factors that influence ecosystems services provided by temperate forests. Specifically, the authors perform a statistical.... more

What’s the Average Methane Isotope Signature in Arctic Wetlands?

Terri Cook, Freelance Writer

From Research Spotlights— Aircraft measurements confirm that methane emissions from northern European wetlands exhibit a uniform regional carbon isotopic signature, despite considerable ground-level heterogeneity.  Although methane (CH4) is a potent greenhouse gas, the relative contributions.... more

Why Is There So Much Carbon Dioxide in Rivers?

Sarah Witman, Freelance Writer

From Research Spotlights— Observations of carbon dioxide oversaturation in the freshwater of the world led scientists to study its underlying causes at more than 100 field locations across the nation. Studies have shown that many of the world’s freshwater rivers and streams are oversaturated.... more

High Arctic Emissions of a Strong Greenhouse Gas

Sarah Stanley, Freelance Writer

From Research Spotlights— Isotope data bring scientists one step closer to revealing the microbial processes behind nitrous oxide emission in the tundra.  Nitrous oxide, often called “laughing gas,” is perhaps most famous for its use as an anesthetic. However, it is also a powerful greenhouse.... more