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163 results for “Water chemistry”
Hog Island Soil Water Nutrient Chemistry 1990-1992
Soil water samples were collected at two depths (15 cm and 50 cm) with porus cup lysimeters from all dune and swale sites across the Hog Island Chronosequence. This included samples from N-fertilized areas on the dunes.
Chemistry contribution to stratospheric ozone depletion after the unprecedented water-rich Hunga Tonga eruption
This datasets provide basis of our analysis in the paper - Chemistry contribution to stratospheric ozone depletion after the unprecedented water-rich Hunga Tonga eruption. We run two different nudged cases: the volcano case with forcing (SO2 and H2O injection) from the HTHH eruption and the control case with no forcing (no SO2 or H2O injection) from the HTHH eruption. The difference between these two nudged simulations gives information about the chemistry contribution to stratospheric ozone depletion after the HTHH eruption. Only the datasets used in analysis are archived here. The data archived here is about 28GB in the Netcdf format. It has a horizontal resolution of 0.9° latitude × 1.25° longitude, and 110 vertical levels, with a vertical resolution of ~500m in the upper troposphere and lower stratosphere.
Lake water and sediments chemistry data along with temporal data on environmental drivers
<p class="Abstract">Increasing iron (Fe) concentrations are found in lakes on a wide geographical scale but exact causes are still debated. The observed trends might result from increased Fe loading from the terrestrial catchment, but also from changes in how Fe distributes between the water column and the sediments. To get a better understanding of the causes we investigated whether there has been any change in the sediment formation of Fe sulfides (FeS) as an Fe sink in response to declining atmospheric sulfur (S) deposition during recent decades. For our study, we chose Lake Bolmen in southern Sweden, a lake for which we confirmed that Fe concentrations in the water column have strongly increased along with water color during 1966 to 2018. Our investigations showed that Fe accumulation and speciation varied independently of S accumulation patterns in the Lake Bolmen sediment record. Thus, we were not able to relate the positive trend in Fe concentrations to reduced FeS binding in the sediments. Furthermore, we found that Fe accumulation rates increased along with lake Fe concentrations, indicating that increased catchment loading rather than a change in the distribution between the sediments and the water column has driven the increase in Fe concentrations. The increased loading may be due to land-use change in the form of an extensive expansion of coniferous forest during the past century. Altered forest management practices and increased precipitation may have led to enhanced weathering and erosion of organic soil layers under aging coniferous forest.</p>
Names, locations, sampling dates, physical characteristics, water chemistry, and plankton data in samples collected in Canadian Prairie lakes in July and August, 2023
<p>PPR Sample Lake Data.xlsx contains names, locations, sampling dates, physical characteristics, water chemistry, and plankton data in samples collected in Canadian Prairie lakes in July and August, 2023. PPR Sample Lake Fact Sheets.pdf contains fact sheets for every sampled lake including maps and essential lake, catchment, and water chemistry characteristics. </p>
Water chemistry and strontium isotopes in the North Thompson watershed, British Columba
<div> <div>These data were collected as part of a larger project to develop a strontium isoscape for the North Thompson watershed in British Columbia as a first step towards mapping salmon distributions. Tributary sites were chosen based on being known coho salmon spawning habitat and/or known sites of diverse upstream geology. Locations for triplicate sampling were randomly selected from the list of all sample sites.</div> </div>
A Comprehensive Water Chemistry Dataset for Iranian Rivers
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Data from: Effects of management on aquatic tree-hole communities in temperate forests are mediated by detritus amount and water chemistry
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Lake water and sediments chemistry data along with temporal data on environmental drivers
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MiCORPS Cooperative Lakes Monitoring Program Lake Surveys, water chemistry, 1974-2012
The Cooperative Lakes Monitoring Program (CLMP) has been an important component of Michigan's inland lakes monitoring program for over 39 years, which makes it the second oldest volunteer monitoring program for lakes in the country. The primary purpose of this cooperative program is to help citizen volunteers monitor indicators of water quality in their lake and document changes in lake quality over time. The goals of the CLMP are: Provide baseline information and document trends in water quality for individual lakes, Educate lake residents, users and interested citizens in the collection of water quality data, lake ecology and lake management practices, provide a cost-effective process for the DEQ to increase baseline data for lakes state-wide. Since 1992, the Michigan Lake and Stream Associations (MLSA) has administered the CLMP jointly with the Michigan Department of Environmental Quality (DEQ) under a Memorandum of Understanding. The ML&SA will continue to administer this program under the Michigan Clean Water Corps
Tip of the Mitt Watershed Council Comprehensive Water Quality Monitoring Program lake chemistry, MI, intermittent years between 1987-2010
The Comprehensive Water Quality Monitoring Program was launched by Tip of the Mitt Watershed Council in 1987, with subsequent field data collection in 1992, 1995, 1998, 2001, 2004, 2007, and 2010. Initially, physical and chemical data were collected on 10 lakes but the program has progressively expanded and, as of the 2010 field season, 143 samples were collected from 60 sites on 55 lakes and streams. Typically, data for nine parameters (temperature, dissolved oxygen, pH, conductivity, clarity, total phosphorous, total nitrogen, nitrate-nitrogen, and chloride) are collected at the surface, middle and bottom of the water column in each water body. This highly-accurate water quality data for lakes and rivers in Northern Michigan, collected consistently for the last 20+ years, have been compiled into a single database that can be used by staff to evaluate aquatic ecosystem health, examine trends within or among water bodies, and identify specific problems.
Tip of the Mitt Watershed Council Comprehensive Water Quality Monitoring Program lake chemistry, MI, intermittent years between 1987-2010
The Comprehensive Water Quality Monitoring Program was launched by Tip of the Mitt Watershed Council in 1987, with subsequent field data collection in 1992, 1995, 1998, 2001, 2004, 2007, and 2010. Initially, physical and chemical data were collected on 10 lakes but the program has progressively expanded and, as of the 2010 field season, 143 samples were collected from 60 sites on 55 lakes and streams. Typically, data for nine parameters (temperature, dissolved oxygen, pH, conductivity, clarity, total phosphorous, total nitrogen, nitrate-nitrogen, and chloride) are collected at the surface, middle and bottom of the water column in each water body. This highly-accurate water quality data for lakes and rivers in Northern Michigan, collected consistently for the last 20+ years, have been compiled into a single database that can be used by staff to evaluate aquatic ecosystem health, examine trends within or among water bodies, and identify specific problems.
USEPA EMAP Surface Waters Lake Database Northeast Lake Water Chemistry Data, 1991-1994
The primary function of the lake water chemistry samples, collected with a van Dorn sampler, is to determine acid-base status, trophic state, and classification of water chemistry type. Water chemistry in lakes is analyzed for two purposes. First, to understand the chemical habitat within which biota must exist so that we can understand the biological potential of the system and second, to evaluate the chemical quality of the water for the purposes of determine the potential stresses to which the biota are exposed. Water chemistry parameters are reported for one sample taken at the location of the deepest part of the lake by a van Dorn sampler from a depth of 1.5 m. These include: aluminum, alkalinity, acid neutralizing capacity, calcium, carbonate, color, specific conductance, dissolved inorganic carbon, dissolved organic carbon, bicarbonate, potassium, magnesium, ammonium, sodium, nitrate, total nitrogen, pH, total phosphorus, silica, total suspended solids, turbidity, and chlorophyll-a. Sampling was initiated July 1991 and ended September 1994.
Illinois EPA Ambient Lake Monitoring Program (ALMP): lake water chemistry from the Springfield laboratory, 2004-2006
The Illinois EPA’s Ambient Lake Monitoring Program (ALMP) was created in 1977 in cooperation with the IL Department of Conservation to assess trends in a select few IL public lakes. The Illinois EPA biologists work out of three Illinois EPA regional offices: Springfield, Marion, and Des Plaines and monitor lakes in their respective areas. Approximately fifty lakes are monitored annually and of those, twenty-five are termed “Core Lakes”. A total of 75 publicly-owned lakes were chosen throughout the state of Illinois as Core Lakes. Previously these lakes were monitored every three years in order to establish a long-term monitoring trends database. In 2008 these lakes and select others were monitored on a five year rotational basis. All lakes are monitored five times yearly; once during the spring runoff and turnover period (April or May), three times during the summer (June, July, August), and once during the fall turnover period (October). Depending on the size of the lake, usually three lake sites are monitored. Monitoring includes collection of water quality and sediment samples as well as, field observation data/measurements such as Secchi disk transparency readings, dissolved oxygen, temperature, quantity of algae, macrophytes, and other key aspects of the lake and sampling event. Water quality samples are collected from one foot below the surface at all sites and two feet above the bottom at only the deepest site. These samples are routinely analyzed for suspended solids, nutrients, and chlorophyll. Additional parameters may be added for a designated period of time at select lakes based on changing data needs.
Lac du Flambeau Tribe Water Resources lake water chemistry, WI, 2010-2012
Lac du Flambeau Water Resources monitors water quality on the LDF reservation on 14 lakes starting in 2010. An older dataset exists going back to 1999 but lacks information such as sampling locations. Current dataset was started by Gretchen Watkins (contact) and is on going. Nutrient dataset includes Chlorophyll a, Inorganic nitrogen, total phosphorus, Kjeldahl nitrogen, total nitrogen, and turbidity. Dissolved oxygen, pH, conductivity are included in the profile dataset.
Ohio Miami University reservoir water chemistry and foodweb data 1992-2010
This research examines how landscapes (watersheds) and food webs interact to regulate ecosystems, focusing on reservoirs of the Midwest USA. This research is collaborative with two other Miami faculty, María González and Bill Renwick, and many students. We are examining how watersheds and omnivorous fish influence lakes along a gradient of watershed land use, ranging from mostly forested watersheds to those that are nearly entirely agricultural. Data provided by Mike/Maria include dissolved nutrients, suspended sediments, DOC, temperature/oxygen profiles, and water clarity from 1992-2010 with frequency and duration of sampling varying among reservoirs. sampling was typically conducted at two sites: (a) a shallow ‘inflow’ cite at the upstream area of a reservoir where the inflowing lotic system is transitioning to a more lentic one, and a deeper ‘outflow’ site just upstream of the dam. Most samples for water chemistry analysis were collected with integrated samplers from the euphotic zone or epilimnion (which usually are the same for these lakes - Vanni comment). For most of our sampling (all the Acton sampling and other sampling done by MU), we measured the depth of the eophotic zone using a light meter (z_eup = depth where light = 1% of surface light). When the ODW collected samples, they did not have a light meter so we used the epilimnopn, which we defined as any depth where oxygen was > 2 mg/L. As I mentioned, because our lakes are pretty productive, oxygen concentrations are usually driven by phytoplankton production so the eiphotic and epilimnetic depths are the same. For some things, we take replicate integrated samples, and we run duplicates on both of those, for a total of 4 values. For example, for chlorophyll we take two samples (two bottles) and run duplicates on both and we label the samples 1a,1b,2a,2b. ….the data we sent you are always means of those values….’.
Northeast temporal lake water chemistry data compiled from four federally funded programs: RLTM, TIME, HELM, ALPS, 1982-2010
These chemistry data were collected from Maine and Northeast lakes that are part of the Environmental Protection Agency (EPA)’s ongoing Regionalized Long-term Monitoring Program (RLTM), begun in 1982; Temporally Integrated Monitoring of Ecosystems (TIME) program that began in 1999; High Elevation Lake Monitoring (HELM); and completed Aquifer Lakes Project (ALPS). The EPA’s RLTM project began in 1982, expanded to include 16 lakes in 1993, and is ongoing as of 2003. The continuous record of chemical data provides information for regional acid rain assessments. Sampling is done in the spring, summer (stratified conditions, both hypolimnion and epilimnion samples are taken), and fall, just at lake overturn. Companion data for lake inlet and outlet streams have been collected. The TIME project includes lakes across New England and New York to examine changes and trends in aquatic chemistry over time. All samples collected before 1999 in the TIME dataset are from a University of Maine EMAP follow-up study. The ALPS program sampled seepage lakes (no surface inlets) with mapped sand and gravel aquifers that are strongly influenced by precipitation chemistry. The survey was done by the University of Maine in 1986-1987, and 1998-2002, and involved the sampling of 128 lakes. The University of Maine’s HELM project was designed to complement the 1984 Eastern Lakes Survey (ELS) by sampling lakes at an elevation of greater than 600m that had been omitted due to size restrictions. The objective was to highlight lakes that are more susceptible to the effects of acid deposition because they receive higher amounts of precipitation, and their watersheds are less able to neutralize acidic inputs because of steep slopes, shallow soils, and resistant bedrock. In 1986-87 all 90 lakes in Maine at an elevation of 600 meters or higher were sampled. A subset of the original 90 lakes has been sampled since 1997 for logistical and financial reasons. The HELM data set contains chemical data for a
Seneca Lake (NY): Epilimnion water chemistry, 1991-2012
This 20-year data set has been overseen by John Halfman, with the assistance of students at Hobart & William Smith Colleges. Four sites were sampled regularly (additional secondary sites visited by Halfman are not included in this spreadsheet). Sampling occured approximately weekly between April and Novemeber each year. Detailed vertical profiles usign CTD casts were also done but not included in this dataset.
Unpublished data, Massachusetts Department of Environment Protection, lake water chemistry data, 1995-2004
This database contains anion, nutrient, and secchi data collected by MA DEP for assessment of water quality in MA lakes. Data spans 1995-2004. The ultimate goal of the MassDEP is to implement a comprehensive monitoring program (status/assessment, trends and flows, and targeted) that serves all water quality management needs, and addresses streams, rivers, lakes, reservoirs, estuaries, coastal areas, wetlands, and groundwater. The five-year rotating watershed assessment program is currently the primary means of meeting the CWA objective related to assessing the status of designated uses. Requirements for the monitoring program designed to support watershed assessments, reflecting CWA mandates, are that it be statewide in scale, comprehensive (all water bodies in the Commonwealth are assessed), and repeated at regular intervals. Water quality surveys generally consist of five sampling events interspersed throughout the water recreation season for conventional water quality analyses such as pH, dissolved oxygen, suspended and total dissolved solids, nutrients, and fecal coliform bacteria.
Wisconsin Forest County Potawatomi Communit Water Resources Program lake chemistry 2003-2010
Chemical water quality data that has been collected by the FCPC Water Resources Program since 2003. Monthly baseline monitoring was completed in September 2010. Quarterly monitoring has been completed since then. Parameters measured include Alkalinity, Chloride, Chlorophyll a, Pheophyton, Nitrate/Nitrite, Ammonia, TKN, Dissolved organic carbon, Ortho Phosphorus, Total phosphorus, Total suspended solids, Sulfates, Secchi, Turbidity.
Lake Wallenpaupack Water Quality Evaluation, PA: water chemistry, 1980-2012
PPL Corporation created Lake Wallenpaupack in 1926 and uses water from the lake to generate hydroelectric power… The Lake Wallenpaupack Watershed Management District (LWWMD) was established in 1979 to preserve and protect the water quality of Lake Wallenpaupack. The LWWMD Board of Directors consists of representatives of the business community, local government, and PPL Corporation. PPL Corporation has funded a yearly water quality monitoring program for Lake Wallenpaupack since the early 1980s. …The water quality of Lake Wallenpaupack has been monitored on a yearly basis from 1980 through the present. In general, the water quality of Lake Wallenpaupack has improved since 1980. Over the past several years, total phosphorus levels in the lake have been stable and consistently lower (better) than 1980 total phosphorus levels. Chlorophyll a and transparency levels were also better than the 1980 levels for many years. However, chlorophyll a have been increasing in recent years, to a peak in 2002, while transparency has been decreasing (becoming less favorable). The main water quality parameters that were evaluated as part of this study include dissolved oxygen, phosphorus, nitrogen, chlorophyll a, transparency, pH, alkalinity, phytoplankton, and zooplankton
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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.