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57 results for “salt lake”
Modeling the effects of lake morphology on chloride retention and salt-driven stratification in two urban lakes in St. Paul, MN
Road salt inputs have caused widespread salinization of urban lakes in northern temperate regions. Watershed characteristics are known to be important drivers of lake chloride concentrations, but there has been less focus on how lake morphometry influences seasonal and interannual dynamics in lake chloride, and how these chloride levels may alter mixing in the water column. We analyzed chloride retention for two urban lakes (Como Lake and Lake McCarrons) in Saint Paul, Minnesota, that are in adjacent watersheds and have similar surface areas, but differ in depth and water residence time. Summer chloride concentrations were negatively related to total summer precipitation for Como Lake (maximum depth 2.2 m), but the relationship was less strong for Lake McCarrons (maximum depth 7.6 m). We used a zero-dimensional model to simulate chloride dynamics in both lakes and tracked the fate of chloride over time. In Como Lake, the mass of chloride in the lake turns over within three years, whereas chloride inputs are retained for >10 years in Lake McCarrons. We then used a one-dimensional hydrodynamic lake model (GLM-AED) to examine how lake depth affects how current chloride loading rates alter lake mixing. Salt inputs significantly extended the duration of summer stratification for simulated lakes with depths of 8 m or more, and salt inputs increased the number of days of hypoxia and anoxia across all depths. These results underscore the importance of considering lake morphometry in understanding the effects of salt inputs on lake ecosystems.
Indicative distribution map for Ecosystem Functional Group F2.7 Ephemeral salt lakes
<p>This archive contains indicative distribution maps and profiles for <strong>F2.7 Ephemeral salt lakes</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Indicative distribution map for Ecosystem Functional Group F2.6 Permanent salt and soda lakes
<p>This archive contains indicative distribution maps and profiles for <strong>F2.6 Permanent salt and soda lakes</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Datasets of Radwin 2023 Great Salt Lake Remote Sensing Historical Assessment
<p>Included are the culminated datasets for an article in review to be published with the Utah Geological Association. This data helps an investigator reproduce or utilize the data. There are datasets for both Landsat and Sentinel, for both the North and South arms of the Great Salt Lake. Additionally, there are datasets documenting the NDWI threshold used for each Landsat image, the outlier images not used in analyses, NDWI error assessment, and calculation of stats/facts.</p> <p>Paper abstract:</p> <p>The Great Salt Lake has been rapidly shrinking since the highstand of the mid-1980s, creating cause for concern in recent decades as the lake has reached historic lows. Many investigators have assessed the evolution of lake elevation, geochemistry, anthropogenic impacts, and links to climate and atmospheric processes; however, the use of remote sensing to study the evolution of the lake has been significantly limited. Harnessing recent advancements in cloud-processing, specifically Google Earth Engine cloud computing, this study utilizes over 600 Landsat TM/OLI and Sentinel MSI satellite images from 1984-2023 to present time-series analyses of remotely sensed Great Salt Lake water area, exposed lakebed area, surface cover types, and chlorophyll-a analyses paired with modelled estimates for water and exposed lakebed area. Results show that since the highstand of 1986-1987, the water area has declined by 45% (~3,000 km<sup>2</sup>) and the exposed lakebed area has increased to ~3,500 km<sup>2</sup> from ~500 km<sup>2</sup>. The area of unconsolidated sediments not protected by vegetation or halite crusts has risen to ~2,400 km<sup>2</sup>. Significant halite crusts are observed in the North Arm, having a max extent of ~150 km<sup>2</sup> between 2002 and 2003, while only small extents of halite crusts are observed for the South Arm. Vegetation is more prevalent in the Bear River Bay and South Arm, with surface area increases over 400% since 1990. Gypsum is widely observed independent of halite crusts. The results highlight multiple instances of land-use/water-management that led to observable changes in water/exposed lakebed area and halite crust extent. This study demonstrates the important benefits of maintaining a lake elevation above ~4,194 ft to maximize lake and halite crust area, which would help mitigate possible dust events and maintain broad lake extent.</p> <p> </p> <p>Files should be self-explanatory based on filename, where BRB means Bear River Bay. Note there are two video files animating the evolution of the North and South Arms of the Great Salt Lake using satellite imagery from 1984 to 2023. </p> <p> </p> <p>Visit https://github.com/radwinskis for details on code used for this study.</p> <p>Please contact me at markradwin@gmail.com with any questions.</p> <p> </p>
Dissolved organic carbon concentrations for seasonal synoptic sampling of 100 urban streams in Salt Lake City, Utah (USA) from 2022-2023
This dataset contains dissolved organic carbon concentrations from surface water samples collected at 100 urban stream locations in the greater Salt Lake City, Utah metropolitan area. Samples were collected four times (July 2022, October 2022, February 2023, and May 2023) to capture spatial and seasonal variation in DOC concentrations. Filtered stream samples were analyzed for dissolved organic carbon concentration. These data were collected as part of the Carbon in Urban Rivers Biogeochemistry (CURB) Project. Detailed field data and site data are published separately and can be linked using the “curbid” and “synoptic_event” columns in each dataset.
Field data for seasonal synoptic sampling of 100 urban streams in Salt Lake City, Utah (USA), 2023-2024
This dataset contains field measurements taken during water sampling from 100 urban stream locations in the greater Salt Lake City, Utah (USA) metropolitan area. Field collection took place during four synoptic sampling events (July 2022, October 2022, February 2023, and May 2023) to capture spatial and seasonal variation in stream conditions (specific conductivity, water temperature, dissolved oxygen, pH, ORP). Filtered stream samples were analyzed for dissolved organic carbon concentration and characteristics, available in a separate dataset. These data were collected as part of the Carbon in Urban Rivers Biogeochemistry (CURB) Project. Detailed field data and site data are published separately and can be linked using the “curbid” and “synoptic_event” columns in each dataset.
Dissolved organic matter characterization for seasonal synoptic sampling of 100 urban streams in Salt Lake City, Utah (USA) from 2023-2024
This dataset contains dissolved organic matter (DOC) characteristics from surface water samples collected at 100 urban stream locations in the greater Salt Lake City, Utah metropolitan area. Samples were collected four times (July 2023, October 2023, January 2024, and May 2024) to capture spatial and seasonal variation in DOC concentrations. Fluorescent optical properties were measured on filtered water samples to understand the chemical composition of dissolved organic matter. Excitation-Emission Matrices (EEMs) were measured using a Horiba Aqualog spectrometer. DOM characteristics were quantified using both standard fluorescence and absorbance metrics as well as through parallel factor (PARAFAC) analysis. These data were collected as part of the Carbon in Urban Rivers Biogeochemistry (CURB) Project. Detailed field data and site data are published separately and can be linked using the “curbid” and “synoptic_event” columns in each data
Newly identified nematodes from the Great Salt Lake are associated with microbialites and specially adapted to hypersaline conditions
<p>Extreme environments enable the study of simplified food-webs and serve as models for evolutionary bottlenecks and early Earth ecology. We investigated the biodiversity of invertebrate meiofauna in the benthic zone of the Great Salt Lake (GSL), UT, one of the most hypersaline lake systems in the world. The hypersaline bays within the GSL are currently thought to support only two multicellular animals: brine fly larvae and brine shrimp. Here, we report the presence, habitat, and microbial interactions of novel free-living nematodes. Nematode diversity drops dramatically along a salinity gradient from a freshwater river into the south arm of the lake. In Gilbert Bay, nematodes primarily inhabit reef-like organosedimentary structures built by bacteria called microbialites. These structures likely provide a protective barrier to UV and aridity, and bacterial associations within them may support life in hypersaline environments. Notably, sampling from Owens Lake, another terminal lake in the Great Basin that lacks microbialites, did not recover nematodes from similar salinities. Phylogenetic divergence suggests that GSL nematodes represent previously undescribed members of the family Monhysteridae – one of the dominant fauna of the abyssal zone and deep-sea hydrothermal vents. These findings update our understanding of halophile ecosystems and the habitable limit of animals.</p>
Fig. 1 in Morphometric characterization of adult Artemia (Crustacea: Branchiopoda) populations from costal and inland Tunisian salt lakes
Fig. 1. Scatterplot of the first two canonical discriminant functions (group centroids) resulting from the discriminant analysis applied to morphological traits and morphometric data for the studied populations, using the origin of each population as a separation factor. Abbreviations for populations are explained in Table 1.
Newly identified nematodes from the Great Salt Lake are associated with microbialites and specially adapted to hypersaline conditions
Open the record for dataset details and reuse information.
Field investigations of salt partitioning and aqueous chemistry of freezing closed-basin lakes in Mongolia as terrestrial analogs of subsurface brine reservoirs on icy bodies [Data set]
<p>All measurement and calculation data</p> <p>Measurement and calculation data in Version 4 were uploaded in 2021-11-2</p>
Google Street View vehicle-based mobile air quality observations in Salt Lake City (May 2019-March 2020)
<p>Google Street View (GSV) mobile air quality data collected in Salt Lake City as part of an Environmental Defense Fund-supported project that took place between May 2019 and March 2020. <br> The data collection, resolved at 1-second frequency, was carried out with two GSV vehicles.</p> <p>The data is in a single CSV (comma-separated value) text file. </p>
Absolute Gravity Measurements in the Geology Building of the University of Utah Salt Lake City
<p> This report contains the results of absolute gravity measurements carried out on the first floor of the geology building of the campus of the University of Utah in Salt Lake City (USA) in September 2021. The measurements took place on a pre-existing benchmark that has been apparently occupied with an A-10 absolute gravimeter. No information or documentation about previous occupations are available.</p> <p>The absolute gravimeter FG5X#302-HC was operated by Olivier Francis from the University of Luxembourg.</p>
FIGURE 3 in Cladonema timmsii, a new species of hydromedusa (Cnidaria: Hydrozoa) from a salt lake in South Australia
FIGURE 3. Cladonema sp., immature. A. Whole animal, lateral view. B. Bell, oral view. C. Tentacle bulb and tentacle, lateral view. D. Bell, aboral view.
FIGURE 2. Cladonema timmsii, n in Cladonema timmsii, a new species of hydromedusa (Cnidaria: Hydrozoa) from a salt lake in South Australia
FIGURE 2. Cladonema timmsii, n. sp., allotype male. A. Whole animal, lateral view. B. Bell, aboral view.
FIGURE 1. Cladonema timmsii, n in Cladonema timmsii, a new species of hydromedusa (Cnidaria: Hydrozoa) from a salt lake in South Australia
FIGURE 1. Cladonema timmsii, n. sp., holotype female. A. Whole animal, lateral view. B. Tentacle bulb and tentacle, abaxial view. C. Tentacle bulb and tentacle, lateral view. D. Bell, aboral view.
Atmospheric pollutant concentrations and leaf chemistry variables collected along gradients of median household income and traffic density in Salt Lake Valley, UT
<p>We utilize traffic density and <i>Convolvulus arvensis </i>leaf chemistry<i> </i>to understand spatial patterns linking atmospheric pollution and household income in the Salt Lake City metropolitan area, USA. We hypothesize that traffic density will explain variation in atmospheric NO<sub>x</sub> and O<sub>3</sub> concentrations. In addition, we expect foliar <span>%N and nitrogen isotope ratios (</span>δ<sup>15</sup>N) to be elevated and carbon isotope ratios (δ<sup>13</sup>C) to be depleted on high traffic density roads<span>. These hypotheses were supported: we found the</span><span> highest</span><span> NO<sub>x</sub> and lowest O<sub>3</sub> concentrations on high-traffic density roads. Also, NO<sub>x</sub> concentrations were higher in low-income neighborhoods. Low-income neighborhoods contained a greater density of high-traffic roads than high-income neighborhoods. Foliar %N was highest in low-income neighborhoods and was correlated with NO<sub>x</sub> and O<sub>3</sub></span>, while δ<sup>15</sup>N was more depleted with increasing O<sub>3</sub>. These findings indicate that the distribution of high-traffic density roads plays a significant role in inequities in pollution exposure between high- and low-income neighborhoods, which is reflected in leaf chemistry.</p>
FIGURE 1 in Salsolaius gen. nov. a new genus of Apalochrini (Coleoptera, Melyridae, Malachiinae) from the salt Lake Way of Western Australia
FIGURE 1. Salsolaius biserratus gen. et sp. nov. (A–D) holotype, male: (A) dorsal view; (B) ventral view; (C) lateral view; (D) head, frontal view. (E–G) paratype, female: (E) dorsal view; (F) head, frontal view; (G) ventral view. Scale bars 1 mm.
Rayleigh wave H/V and phase velocity measurements of "3D Shear Wave Velocity Model of Salt Lake Valley via Rayleigh Wave Ellipticity Across a Temporary Geophone Array"
<p>This file includes Rayleigh wave H/V and phase velocity measurements of the paper "3D Shear Wave Velocity Model of Salt Lake Valley via Rayleigh Wave Ellipticity Across a Temporary Geophone Array" in journal The Seismic Record by Qicheng Zeng, Fan-Chi Lin, and Amir A. Allam. Detailed desciption in README in the zip file.</p>
Subspecies and Distribution. D. m. microps Merriam, 1904 — SW USA (Owens River drainage of W Mojave Desert, S California). D. m. alfredi Goldman, 1937 — W USA (Gunnison I, Great Salt Lake, Utah). D. m. aquilonius Willett, 1935 — W USA (lower elevations of the Great Basin Desert of NE California and NW Nevada). D. m. bonneuvillei Goldman, 1937 — W USA (Great Basin Desert of NE Nevada and NW Utah, corresponding closely with the former outline of Pleistocene Lake Bonneville). D. m. celsus Goldman, 1924 — SW USA (possibly disjunct distribution in Virgin River Valley of SW Utah and adjacent NW Arizona). D. m. centralis Hall & Dale, 1939 — W USA (Great Basin Desert of C & E Nevada). D. m. idahoensis Hall & Dale, 1939 — W USA (restricted to the Snake River Valley, SW Idaho). D. m. leucotis Goldman, 1931 — SW USA (restricted distribution between the Vermilion Cliffs and the brink of Marble Canyon of the Colorado River in N Arizona). D. m. levipes Merriam, 1904 — SW USA (restricted to Panamint Valley, S California). D. m. occidentalis Hall & Dale, 1939 — SW USA (Great Basin Desert in W & S Nevada and disjunct, restricted populations in the W Mojave Desert, SE California). D. m. preblei Goldman, 1921 — W USA (Great Basin Desert of SE Oregon and NW Nevada). D. m. russeolus Goldman, 1939 — W USA (Dolphin I, Great Salt Lake, Utah). D. m. subtenuis Goldman, 1939 -W USA (Badger, Carrington, and Stansbury Is, Great Salt Lake, and S on the mainland to Cedar Valley, NC Utah). in Heteromyidae
Subspecies and Distribution. D. m. microps Merriam, 1904 — SW USA (Owens River drainage of W Mojave Desert, S California). D. m. alfredi Goldman, 1937 — W USA (Gunnison I, Great Salt Lake, Utah). D. m. aquilonius Willett, 1935 — W USA (lower elevations of the Great Basin Desert of NE California and NW Nevada). D. m. bonneuvillei Goldman, 1937 — W USA (Great Basin Desert of NE Nevada and NW Utah, corresponding closely with the former outline of Pleistocene Lake Bonneville). D. m. celsus Goldman, 1924 — SW USA (possibly disjunct distribution in Virgin River Valley of SW Utah and adjacent NW Arizona). D. m. centralis Hall & Dale, 1939 — W USA (Great Basin Desert of C & E Nevada). D. m. idahoensis Hall & Dale, 1939 — W USA (restricted to the Snake River Valley, SW Idaho). D. m. leucotis Goldman, 1931 — SW USA (restricted distribution between the Vermilion Cliffs and the brink of Marble Canyon of the Colorado River in N Arizona). D. m. levipes Merriam, 1904 — SW USA (restricted to Panamint Valley, S California). D. m. occidentalis Hall & Dale, 1939 — SW USA (Great Basin Desert in W & S Nevada and disjunct, restricted populations in the W Mojave Desert, SE California). D. m. preblei Goldman, 1921 — W USA (Great Basin Desert of SE Oregon and NW Nevada). D. m. russeolus Goldman, 1939 — W USA (Dolphin I, Great Salt Lake, Utah). D. m. subtenuis Goldman, 1939 -W USA (Badger, Carrington, and Stansbury Is, Great Salt Lake, and S on the mainland to Cedar Valley, NC Utah).
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.