AbstractAmong various proposed geoengineering methods, ocean alkalinity enhancement (OAE) stands out as a unique solution. By mimicking natural weathering processes, OAE can simultaneously enhance oceanic carbon uptake and mitigate ocean acidification. However, the full efficacy and potential side effects of OAE remain to be fully understood. To evaluate the efficacy of OAE through natural pathways ...
AbstractThe seasonal mixed layer pump (MLP) is an important pathway transporting organic carbon from the upper ocean to the ocean interior. While the MLP’s export role has been well-studied in high latitudes, its contribution in low latitudes remains uncertain. Here, we quantify the seasonal MLP-driven carbon export (EMLP) in low-latitude oceans using data from 26 biogeochemical profiling floats. ...
AbstractExcess anthropogenic carbon dioxide (CO2) emissions are a major driver of the ongoing climate crisis, underscoring the urgent need for scalable CO2 removal technologies Photosynthesis enhancement via microalgae represents a promising pathway. Here, we report a targeted CO2 removal strategy using a metal-organic framework (MOF), ZIF-8-NH2, assembled directly onto the surface of Spirulina platensis....
AbstractThe twilight zone plays a pivotal role in the oceanic carbon cycle because large amounts of organic carbon (OC) exported from the euphotic zone are degraded within this layer. However, the magnitude and variability of this remineralization flux remain incompletely understood, particularly across varying regional scales. Using a new particulate excess barium (PBaxs)-oxygen utilization rate transfer ...
AbstractBy disturbing the upper ocean, typhoons may play a crucial role in marine ecosystems. Previous studies mostly demonstrated surface chlorophyll a (Chl a) increase under typhoon conditions. By using satellite data and a physical–biogeochemical model, however, we show that approximately 49% of typhoons crossing the northern shelf of the South China Sea induced surface Chl a decline. Cases with ...
AbstractAquaculture sector growth is challenged by feed constraints, particularly the erratic availability and cost of fishmeal and oil from wild forage fish. Limited attention is given to the risks that forage fish shortfalls pose to aquaculture feed supplies. Here we develop a shortfall impact model to investigate the effects of varying forage fish supply scenarios on global fed aquaculture. Results ...
AbstractThe diazotrophic cyanobacterium Trichodesmium is sensitive to ultraviolet (UV) radiation under phosphate (P)-replete conditions, but little is known about UV impacts on its physiology under P-limitation. Here we show that periodic exposures to low or moderate levels of UV (4–12 W m−2 UVA, 0.5–1 W m−2 UVB) under P-limited (0.5 μM) conditions enhanced its growth by approximately 31%...
AbstractDocumenting changes in the Arctic sea-ice variability are essential for understanding the spring sea-ice predictability barrier. While Tibetan Plateau snow cover (TPSC) has been linked to Arctic sea-ice variability, the spatiotemporal stability of this relationship remains unclear. In this study, combing satellite observations and snow experiments, we identified a shift in connections between ...
AbstractAs climate awareness grows, investors are integrating climate performance into their investment decision-making processes to mitigate potential risks. This paper examines the societal costs associated with the carbon footprints of publicly listed companies in China and explores whether investors demand compensation for their exposure to risks associated with investments in assets with greater ...
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