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Adapting to life: ocean biogeochemical modelling and adaptive remeshing

We present a novel method of simulating ocean biogeochemical behaviour on a vertically adaptive computational mesh, where the mesh changes in response to the biogeochemical and physical state of the system throughout the simulation.

Subsurface pH and carbonate saturation state of aragonite on the Chinese side of the North Yellow Sea: seasonal variations and controls

Based upon eight field surveys conducted between May 2011 and May 2012, we investigated seasonal variations in pH, carbonate saturation state of aragonite, and ancillary data on the Chinese side of the North Yellow Sea.

Exploring local adaptation and the ocean acidification seascape – studies in the California Current Large Marine Ecosystem

Here we present the OMEGAS strategy of co-locating sensors and oceanographic observations with biological studies on benthic marine invertebrates, specifically measurements of functional traits such as calcification-related processes and genetic variation in populations that are locally adapted to conditions in a particular region of the coast.

Observed decline of the Atlantic meridional overturning circulation 2004–2012

Ocean Science
DOI 10.5194/os-10-29-2014
6 February 2014

The Atlantic meridional overturning circulation and its component parts are monitored by combining a transatlantic array of moored instruments with submarine-cable-based measurements of the Gulf Stream and satellite derived Ekman transport. The time series has recently been extended to October 2012 and the results show a downward trend since 2004.

China’s dimming and brightening: evidence, causes and hydrological implications

In this study, we synthesize reliable results and conclusively address recent advances and insufficiencies in studies on dimming and brightening in China.

Regional variability of acidification in the Arctic: a sea of contrasts

In this study, we use an ocean-only general circulation model, with embedded biogeochemistry and a comprehensive description of the ocean carbon cycle, to study the response of pH and saturation states of calcite and aragonite to rising atmospheric pCO₂and changing climate in the Arctic Ocean.

Weathering by tree-root-associating fungi diminishes under simulated Cenozoic atmospheric CO₂decline

We report experimental evidence for a negative feedback across a declining Cenozoic [CO₂]_a range from 1500 to 200 ppm, whereby low [CO₂]_a curtails mineral surface alteration via trenching and etch pitting by arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) fungal partners of tree roots.

Seasonal variations of sea–air CO₂ fluxes in the largest tropical marginal sea (South China Sea) based on multiple-year underway measurements

Based upon 14 field surveys conducted between 2003 and 2008, this paper shows that the seasonal pattern of sea surface partial pressure of CO₂ (pCO₂) and sea–air CO₂ fluxes differed among four different physical–biogeochemical domains in the South China Sea proper.

Ratios among atmospheric trace gases together with winds imply exploitable information for bird navigation: a model elucidating experimental results

A model of avian goal-oriented navigation is described that is based on two empirical findings building a bridge from ornithology to atmospheric chemistry.

Nitrous Oxide (N₂O) production in axenic Chlorella vulgaris microalgae cultures: evidence, putative pathways, and potential environmental impacts

Using antibiotic assays and genomic analysis, this study demonstrates nitrous oxide (N₂O) is generated from axenic Chlorella vulgaris cultures. In batch assays, this production is magnified under conditions favouring intracellular nitrite accumulation, but repressed when nitrate reductase (NR) activity is inhibited.

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