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10,553 results for “measurements”
Point-frame measurement of maximum canopy height for plant growth forms at the 2007 Anaktuvuk River Fire scar measured in 2019.
This file contains maximum plant heights from point frame measurements made in the southern section of the 2007 Anaktuvuk River fire scar, at a severely burned site and a nearby unburned site. Pin-vegetation contact was recorded using a 0.56 m2 frame with 41 evenly spaced sampling points. Data were collected during peak green in summer 2019. These data were used to examine the impact of post-fire changes in plant community composition and structure on habitat suitability and rodent herbivore activity in response to a large, severe, and unprecedented fire in northern Alaska moist acidic tussock tundra.
Eriophorum vaginatum tiller nitrogen content at the 2007 Anaktuvuk River fire scar and nearby unburned tundra measured in 2019.
Tillers from 24 Eriophorum vaginatum individuals were sampled in late July 2019 to examine differences in percent nitrogen between previously burned (Anaktuvuk River Fire) and unburned tussocks at a nearby unburned control site. At the burned site tussocks exhibiting evidence of rodent grazing were also sampled to separate herbivore effects from those of the fire. From each tussock, 3-4 new leaves were sampled (as indicated by lack of brown tips) and dried at 60°C for 24 hours, before being ground and analyzed for percent nitrogen. The goals of the project were to examine the impact of post-fire changes in plant community composition, nutrient quality and structure on habitat suitability and rodent herbivore activity in response to a large, severe, and unprecedented fire in northern Alaska moist acidic tundra.
Bonanza Creek LTER: Hourly Air Temperature Measurements (sample, 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 Vaisala HMP35 and HMP45 temperature sensors for the Bonanza Creek Experimental Forest (BCEF). Any temperature data collected in this area is reported here. 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 Barometric Pressure Measurements from 1995 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
A Campbell Scientific data logger and pressure sensor were used to measure barometric pressure at the LTER1 meteorological station in the Bonanza Creek Experimental Forest (BCEF) beginning in 1995.
Bonanza Creek LTER: Hourly Photosynthetically Active Radiation (PAR) Measurements from 1988 to Present in the Bonanza Creek Experimental Forest and the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
PAR sensors measure solar radiation in the 400 to 700 nm waveband in microEinsteins per sq. m. per second. The average hourly reading is converted to microEinsteins per sq. m. per hour and summed over 24 hours to obtain daily Einsteins per sq. m. Sensors are removed at the end of September for annual calibrations and replaced back at the sites by the first of May each year.
Bonanza Creek LTER: Hourly Snow Depth Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
Snow depth is measured hourly at both the LTER1 and LTER2 research stations within Bonanza Creek Experimental Forest using a Campbell Scientific data logger and a SR50 sonic snow depth sensor.
Bonanza Creek LTER: Hourly Air Temperature Measurements (mean, min, max) at Various Heights from 1995 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
This dataset contains the hourly output from Temperature sensors for the Cariou-Poker Creeks Research Watershed (CPCRW). Any temperature data collected in this area is reported here. 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 Precipitation Measurements from 1993 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
Precipitation is measured at many sites withinCPCRW 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.
Bonanza Creek LTER: Hourly Evaporation measurements at Core Sites from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
This study is a survey of the vegetation of the 35 control sites in Bonanza Creek LTER. The 35 sites represent replicates each of six successional stages of primary succession on the floodplain of the Tanana River and four stages of succession uplandsas well as a few recently burned sites. Data include percent cover of all species and count based on twenty 1 m2 or 4 m2 plots. Plots in young stages of succession were remeasured every 1 to 2 years; those in older stages every 3 to 5 years. Some information on biomass in these stages is available. Although most sites were established in 1988 some sites have vegetation plots that have been sampled periodically since 1965. 2009 was the last year of sampling using visual estimates of percent cover. In 2007 a new point framing system was developed and is now used for collecting vegetation data from these sites.
Bonanza Creek LTER: Hourly Snow Pillow Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
The snow pillow records the hourly water content of the snowpack (snow water equivalent) at the LTER1 site within the Bonanza Creek Experimental Forest during the winter months.
Bonanza Creek LTER: Hourly Barometric Pressure Measurements from 2000 to Present in the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
A Campbell Scientific data logger and pressure sensor were used to measure barometric pressure at the CRREL meteorological station in the Caribou-Poker Creeks Research Watershed (CPCRW) beginning in 2000.
Bonanza Creek LTER: Hourly Dew Point Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
Dew point values are calculated using the data from the air temperature and relative humidity sensors collected at the corresponding Bonanza Creek Long Term Ecological Research climate stations.
Bonanza Creek LTER: Hourly Pyranometer (PYR) Measurements from 1988 to Present in the Bonanza Creek Experimental Forest and the Caribou-Poker Creeks Research Watershed near Fairbanks, Alaska
The pyranometers measure the energy flux density of global sun plus sky radiation across a broad band from 280 to 2800 nm. The sensor consists of a silicon photodiode which does not have an equal spectral response across the band. However, this does not cause serious error for measurements of solar radiation, provided the spectral distribution is not altered, such as within plant canopies. Winter measurements may be inaccurate due to snow cover.
Bonanza Creek LTER: Hourly Vapor Pressure (VP) Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
Calculated vapor pressure values using the air temperature and relative humidity data collected at the corresponding Bonanza Creek climate station 150cm sensors.
Bonanza Creek LTER: Hourly Ultraviolet Radiation (UV) Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
In 1993, Eppley total UV radiometers (TUVR) were installed at each climate station on 21 April at LTER1 and 5 May at LTER2. These radiometers consist of a Weston selenium barrier-layer photoelectric cell with a sealed-in quartz window, a bandpass filter to restrict the wavelength response of the photcell to the designed range (295-385 nm), and a diffusing disc of Virgin Teflon to reduce the light intensity at the filtered photocell and also to improve the adherence of the instrument to the Lambert cosine law. The disc is nearly uniform diffusing over the wavelength range of interest, as well as geometrically within the system. The terminals of the photocell are connected through a precision resistor and the signal measured as a voltage drop across the resistor. Winter measurements may be inaccurate due to snow cover.
Bonanza Creek LTER: Hourly Precipitation Weighing Bucket Measurements from 1988 to Present in the Bonanza Creek Experimental Forest near Fairbanks, Alaska
This data set includes year round precipitation values from LTER1 and LTER2. Sampling buckets are 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 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.
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: 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.
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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.