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Swirling Currents: How Ocean Mesoscale Affects Air-Sea CO2 Exchange
Due to a sparsity of in‐situ observations and the computational burden of eddy‐resolving global simulations, there has been little analysis on how mesoscale processes (e.g., eddies, meanders—lateral scales of 10s to 100s km) influence air‐sea CO2 fluxes from a global perspective. Recently, it became computationally feasible to implement global eddy‐resolving [O (10) km] ocean biogeochemical […]
Read MoreHow tiny teeth and their prey shape ocean ecosystems
It has long been suggested that diatoms, microscopic algae enclosed in silica-shells, developed these structures to defend against predators like copepods, small crustaceans that graze diatoms. Copepods evolved silica-lined teeth presumably to counteract this. But actual evidence for how this predator-prey relationship may drive natural selection and evolutionary change has been lacking. A recent publication […]
Read MoreFast-sinking salp and fish detritus impacts OMZ size and ocean biogeochemical cycles
Marine fishes and filter-feeding gelatinous zooplankton such as salps and pyrosomes generate detritus in the form of poop and dead carcasses, which sink ~10 times faster than other oceanic detritus. This detritus is hypothesized to have a disproportionally large impact on the marine biological pump as it sequesters carbon and nutrients deeper in the water […]
Read MoreThe fate of the 21st century marine carbon cycle could hinge on zooplankton’s appetite
Both climate change and the efforts to abate have the potential to reshape phytoplankton community composition, globally. Shallower mixed layers in a warming ocean and many marine CO2 removal (CDR) technologies will shift the balance of light, nutrients, and carbonate chemistry, benefiting certain species over others. We must understand how such shifts could ripple through […]
Read MorePlankton plummet in one of the world’s longest time series
Phytoplankton are the main primary producers in the ocean and fuel marine food webs. Long-term shifts in phytoplankton biomass are useful for understanding the context of short-term changes and for examining the relationships between climate indices and phytoplankton dynamics. However, current monitoring programs often offer too short a time frame to disentangle these relationships. In […]
Read MoreA New Insight into Ocean Carbon Sequestration
How does the microbial carbon pump (MCP) redefine our understanding of oceanic carbon sequestration and climate change mitigation? A recent study published in Nature Reviews Microbiology reviews the pivotal role of the microbial carbon pump (MCP) a novel concept differing from the known mechanisms for carbon sequestration in the ocean, the Biological Carbon Pump (BCP), […]
Read MoreOut of sight, out of mind: extreme signals of ocean acidification hidden in the mesopelagic
Ocean Acidification (OA), caused by the air-to-sea transfer of anthropogenic carbon (Cant), is intuitively thought to be a surface-intensified process, which makes sense because the concentration of Cant is greatest near the ocean surface and decreases with depth. But this intuition is not correct for multiple metrics of OA that are less commonly studied below […]
Read MorePolar regions are changing: warming, losing sea ice, and experiencing shifts in the phenology of seasonal events. Global models predict that phytoplankton blooms will start earlier in these warming polar environments. What we don’t know is will this be true for all high-latitude regions? Is the timing of phytoplankton growing season moving earlier in the […]
Read MoreBlue carbon ecosystems—mangroves, saltmarshes, and seagrass meadows—carbon sequestration powerhouses that can help us mitigate climate change. For many years, our community has focused on studying and quantifying organic carbon storage in the soils of these ecosystems and crediting it as Blue Carbon in carbon markets. A new paper in Nature Communications reveals that much of […]
Read MoreNew algorithm unclogs major bottleneck in ocean geochemical and biogeochemical modelling
Numerical models are some of the principal tools for understanding the cycling of geochemical and biogeochemical tracers in the ocean, with the latter also being important components of the Earth System Models used to project future climate change. However, in order to use these models they must first be integrated to a seasonally-repeating equilibrium with […]
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