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6 results for “atmospheric sulfates”
Long-term monitoring reveals forest tree community change driven by atmospheric sulfate pollution and contemporary climate change
Aim: Montane environments are sentinels of global change, providing unique opportunities to assess impacts on species diversity. Multiple anthropogenic stressors such as climate change and atmospheric pollution may act concurrently or synergistically in restructuring communities. Thus, a major challenge for conservation is untangling the relative importance of different stressors. Here, we combine long-term monitoring with multivariate community modeling to estimate the anthropogenic drivers shaping forest tree diversity along an elevational gradient. Location: Camels Hump Mountain, Vermont, USA Methods: We used Generalized Dissimilarity Modelling (GDM) to model spatial and temporal turnover in beta diversity along an elevational gradient over a 50-year period, and tested for spatiotemporal shifts in density and elevational distribution of individual species. GDMs were used to predict community turnover as non-linear functions of changes in elevation, climate and atmospheric pollution. Results: We observed significant shifts in elevational range and density of individual species, which contributed to an overall reduction in the elevational gradient in beta diversity through time. GDMs showed the combined effects of sulfate deposition and temperature as drivers of this temporal reduction in beta diversity. Spatiotemporal changes differed among species, with shifts observed both up and downslope. For example, in a reversal of a previous upslope range contraction, red spruce (Picea rubens Sarg.) increased in density and shifted downslope since the 1990's, occupying warmer, drier climates. Main conclusion: Our results demonstrate that global change is impacting the stratification of forest tree diversity along elevational gradients, but the responses of individual species are complex and variable in direction. We suggest abiotic drivers may directly impact individual species while also indirectly altering species interactions along elevational gradients. Our approach modelling the drivers of compositional turnover quantifies the rate and amount of change in beta diversity along environmental gradients, and serves as a powerful complement to studying species-specific responses.
Long-term monitoring reveals forest tree community change driven by atmospheric sulfate pollution and contemporary climate change
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Dataset for "Additive water uptake of the mixtures of urban atmospheric HULIS and ammonium sulfate, J. Geophys. Res. Atmos."
<p>The hygroscopicity of humic-like substances (HULIS) and their mixtures with ammonium sulfate in various proportions were investigated. The dataset in the Excel sheet contains measured hygroscopic growth factors and parameters derived from them, results of sensitivity analysis considering surfactants, and estimated proportions of multiply charged particles for Zhou et al. in Journal of Geophysical Research: Atmospheres. The dataset is based on the work supported by JSPS KAKENHI JP19H04253, JP20F20397, and JP23H00515.</p> <p>Ruichen Zhou, Sonia Afsana, Chenran Wei, and Michihiro Mochida: Additive water uptake of the mixtures of urban atmospheric HULIS and ammonium sulfate, J. Geophys. Res. Atmos.</p>
Sulfites and Sulfates Formed by Weathering of Early Martian Carbonates in a Sulfur Dioxide-Bearing Atmosphere
<p>This data package contains the X-Ray diffraction (XRD) and infrared reflectance data acquired on the samples of carbonates altered in SO2/H2O or SO2/H2O/H2O2 atmospheres (pressure 0.8 bar, temperature 25C). The package also included pictures of the samples after alteration in the two simulated atmospheres. </p>
Atmospheric H2O2 during haze episodes in a Chinese megacity: concentration, sources, and implication on sulfate production-Date
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Relative rate kinetics aqueous sulfate radical reaction with some atmospherically relevant compounds
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.