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2,532 results for “at present”
Bonanza Creek LTER: Annual Active Layer Depths from 2002 to Present in the Survey Line Fire near Fairbanks, Alaska
In 2001 the Survey Line Fire burned an area of black spruce forest along the Tanana River adjacent to the Bonanza Creek Experimental Forest. In 2002 two research sites were established within the burn, one in a dry area and one in a wet area. When wildfire burns through a northern black spruce forest there is usually a subsequent increase in depth of thaw, due to the reduction in the depth of the organic layer. Thaw depth is being measured annually at tweny points within each of these sites.
Bonanza Creek LTER: Hourly Relative Humidity Measurements (mean, min, max) at 50 cm and 150 cm from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
This dataset contains the hourly output from relative humidity sensors for the Bonanza Creek Experimental Forest (BCEF). Most sites have two sensors, one at 50 cm and one at 150cm. This includes Level 3 weather stations as well as smaller scale and temporal studies. This data can be sorted and viewed by site, year, hour, height of measurement, mean, min, and max value. Updates of each site are different since some are still on going while other had only a 2 - 3 year life cycle. This information can be found in the site descriptions and in the metadata.
Bonanza Creek LTER: Hourly Soil Temperature Measurements at Various Depths from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
A collection of soil temperatures from upland and floodplain sites. Temperatures are recorded from a range of depths: Surface,0, 5, 10, 20, 50, 100, and 200 cm. Depths represent the depth below the organic mineral interface (O/M) that the sensor was placed. Sensors in the organic soil layers were added at some sites and are given a negative depth value to indicate they were placed above the O/M interface. There is also a Surface temperature which is kept in the top few centimeters of the forest floor.
Greenup values for interior alaska 1976 - Present
Greenup, the frequent rapid transformation of Interior Alaska from Brown space to spring green as the leaves deciduous trees burst forth, is suddenly enough to allow assignment of a single date in a given area to this culmination of a key biological process. Greenup is important for more than just an aesthetic or biological perspective. For example, once Greenup has occurred, there is a rapid increase in evapotranspiration. Which in turn has important consequences in the areas mesoscale meteorology. Here, dates for green around Fairbanks for more than 20 springs are correlated against several different temperature derived indices calculated entirely from routinely available climatological data. We examined a variety of degree day statistics and temperature thresholds. The relationships between these parameters and Greenup dates in Interior Alaska should be useful in projecting future greenup dates. They may also be useful to post analyze Greenup dates in years for which there is meteorological data but no surviving record of Greenup dates.
Bonanza Creek LTER: Hourly Relative Humidity Measurements (mean, min, max) at Various Heights from 1992 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
This dataset contains the hourly output from the relative humidity sensors for the Caribou-Poker Creeks Research Watershed (CPCRW) climate data stations.
Bonanza Creek LTER: Tree Inventory Data from 1989 to present at Core research sites in Interior Alaska
This is the data from the periodic (3-10 yr interval) tree inventory monitoring of tree growth within the vegetation control plots. In 2013 and 2014, an initial tree inventory was done on each site belonging to the Regional Site Network (RSN). Some young RSN sites had no, or very few trees. In general, inventory is every 5 years presently; the most recent collection was in 2018 and next scheduled collection is for 2023.
Bonanza Creek LTER: Hourly Precipitation Weighing Bucket Measurements from 2008 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
This data set includes year round precipitation values from sampling buckets filled with antifreeze to melt and prevent snow build up. While these sensors work year round, tipping bucket data seems more accurate for snow free periods.
Bonanza Creek LTER: Hourly Snow Depth Measurements from 2006 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
Hourly snow depth measured in meters from the CRREL and CARSNOW climate data stations within CPCRW using a Campbell Scientific data logger and a SR50 sonic snow depth sensor.
Bonanza Creek LTER: Hourly Dew Point Measurements from 2006 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
Calculated dew point values using the air temperature and relative humidity data collected at the corresponding Caribou-Poker Creeks Research Watershed climate station.
Bonanza Creek LTER: Hourly Vapor Pressure (VP) Measurements from 2006 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
Calculated vapor pressure values using the air temperature and relative humidity data collected at the corresponding Caribou-Poker Creeks Research Watershed climate station.
Bonanza Creek LTER: Hourly Soil Temperature Measurements at Various Depths from 1998 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
Hourly soil temperature is recorded at several sites within CPCRW. A variety of sensors are alo used including Campbell Scientific CS107's as well as a variety of thermistors.
Bonanza Creek LTER: Hourly Soil Moisture (VWC) at Various Depths from 2000 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
A collection of soil moisture measurements collected with from CPCRW sites. Moisture is recorded from a range of depths: 10, 20, and 40 cm.
Bonanza Creek LTER: Hourly Precipitation Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
Precipitation is measured at many sites within BCEF using TE525 tipping buckets. These sensors are able to detect .254mm of precipitation and record hourly totals of rainfall or throughfall. It should be noted the tipping buckets within forested sites are subject to clogging by forest debris whcih can result in under reporting of rain events as well as over reporting upon release of the collected precipitation. There is data from floodplains to upland sites along a range of successional gradients.
Bonanza Creek LTER: Hourly Soil Moisture (VWC) at Various Depths from 2002 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
A collection of soil moisture from upland and floodplain sites. Moisture is recorded from a range of depths: 5, 10, 20, and 50 cm. Data was recorded using Campbell Scientific dataloggers. The sensors in use are CS615 water content reflectometers. The period average is recorded and converted to volumetric water content using the Topp's equation.
Bonanza Creek LTER: Annual Active Layer Depths from 1984 to Present in the Bonanza Creek Fireline near Fairbanks, Alaska
In 1983 the Rosie Creek fire burned sections of the Bonanza Creek Experimental Forest, providing researchers with a chance to study fire effects. Part of the study was to initiate another long term study on effects of firelines in permafrost areas similar to the one after the Wickersham fire in 1971. This dataset comprises depths to permafrost in a transect perpendicular to a fireline that was dug during the Rosie Creek fire in 1983. The transect proceeds from the burned area, across the fireline and into an unburned control area. Permafrost depth is measured at intervals in each area with a frost probe on a yearly basis. There are ten stakes in the burned area, twenty in the fireline and fireline margin areas, and ten stakes in the control area. Portions of the fireline were either cleared of vegetation or scraped to mineral soil. In 2002 Kenji Yoshikawa drilled a 5 meter deep hole between stakes nine and ten.
Hubbard Brook Experimental Forest: Instantaneous Streamflow by Watershed, 1956 – present
Streamflow at 9 watersheds (12-77 Hectares) within the Hubbard Brook Experimental Forest in New Hampshire, USA has been measured continuously from as early as 1955. Streams are gaged with V-notch weirs, in some cases in combination with rectangular San Dimas flumes, at the outlet of each watershed. Through 2012, stage heights were recorded by means of a mechanical spring-wound clock and pen on a strip-chart recorder. Beginning January 1, 2013, these analog chart recorders were replaced with digital sensors. Overlap with both measurement techniques occurred for several years at all weirs. Streamflow data were gathered by the Hubbard Brook Experimental Forest and contributed to the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Chemistry of freely-draining soil solutions at the Hubbard Brook Experimental Forest, Watershed 1, 1996 - present
Tension-free lysimeters were installed in three soil horizons at 13 locations within Hubbard Brook Experimental Forest Watershed 1, representing the variation in elevation and forest type of the watershed. At each location lysimeters were placed beneath the Oa horizon and within the upper and lower B horizon. Soil solution samples were collected approximately monthly and analyzed for pH, acid neutralizing capacity (ANC), base cations, soluble anions, trace metals, nitrogen and carbon. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Mark-recapture data of the Northern Spring Salamander (Gyrinophilus porphyriticus), Hubbard Brook Experimental Forest, 2012 – present
This data set includes spatially explicit mark-recapture data of the Northern Spring Salamander (Gyrinophilus porphyriticus) collected during the summer months (June – August) from downstream and upstream reaches in multiple streams in the Hubbard Brook Experimental Forest. Downstream reaches begin at the confluence with the Main Hubbard and extend upstream 500 meters and upstream reaches begin at the weir and extend downstream 500 meters. Downstream reaches contain brook trout and upstream reaches do not. We used a robust design framework with approximately 9 surveys per reach each summer (3 primary occasions with 3 secondary occasions each). Salamanders were captured by hand and marked with either Visual Implant Elastomer and/or a PIT tag. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. These data have been published in the following papers: Lowe WH, Addis BR, Smith MR, Davenport JM. The spatial structure of variation in salamander survival, body condition and morphology in a headwater stream network. Freshwater Biol. 2018;63:1287–1299. https://doi.org/10.1111/fwb.13133 Lowe, W. H., and Addis, B. R.. 2019. Matching habitat choice and plasticity contribute to phenotype–environment covariation in a stream salamander. Ecology 100( 5):e02661. 10.1002/ecy.2661 Lowe, W.H., et al. Hydrologic variability contributes to reduced survival through metamorphosis in a stream salamander. Proceedings of the National Academy of Sciences 2019; 116.39: 19563-19570. Bryant, A.R., Gabor, C.R., Swartz, L.K., Wagner, R., Cochrane, M.M., Lowe, W.H. Differences in corticosterone release rates of larval Spring Salamanders (Gyrinophilus porphyriticus) in response to native fish presence. Biology 2022; 11.484. https://doi.org/10.3390/biology11040484 Addis, B.R., and W.H. Lowe. Environmentally associa
Mass and Chemistry of Organic Horizons and Surface Mineral Soils on Watershed 6 at the Hubbard Brook Experimental Forest, 1976 - present
The forest floor of Watershed 6 was first sampled in 1969-70. These data include forest floor thickness, soil mass, organic matter content, and major-element composition for samples collected since 1976. Watershed 6 has been resampled at intervals varying from one to ten years. Sampling at five to ten year intervals is expected to continue. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Mass and Chemistry of Organic Horizons and Surface Mineral Soils on Watershed 1 at the Hubbard Brook Experimental Forest 1996-present
This data set includes chemistry of O-horizons ("forest floor") and the 0-10 cm mineral soil layer in Watershed 1 at Hubbard Book. Calcium in the form of wollastonite (CaSiO3) was added to Watershed 1 in October 1999. The application rate was 1028 kg Ca per ha, and the application was relatively uniform across the watershed. Pre-treatment forest floor surveys were completed in 1996 and 1998. The first post-treatment forest floor survey was completed in 2000. This data set includes mass and thickness data for the sampled layers. Chemical data include concentrations and pools of organic matter, C, N, Ca, Mg, K, P, Mn, Fe, Al, Cu, Pb, and Zn. Soil pH and exchangeable Al, Ca, Mg, K, and H are also included. Sampling is intended to continue at 4 or 5 year intervals. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
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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.