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22,549 results for “AND LTER”
Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1997.
Daily weather data file for Arctic Tundra LTER site at Toolik Lake. Included are daily averages and/or maximums and minimums of air, soil and lake temperature, wind speed, vapor pressure, and sum of global radiation and unfrozen precipitation recorded near Toolik Lake.
Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1998.
Daily weather data file for Arctic Tundra LTER site at Toolik Lake. Included are daily averages and/or maximums and minimums of air, soil and lake temperature, wind speed, vapor pressure, and sum of global radiation and unfrozen precipitation recorded near Toolik Lake.
Hourly weather data from Toolik Field Station, ARC LTER, Alaska for 1998.
Hourly weather data from the Arctic Tundra LTER site at Toolik Lake. The following parameters are measured every minute and averaged or totaled every hour: air temperature and relative humidity at 1 and 5 meters, wind speed at 1 and 5 meters, wind direction at 5 meters, global solar radiation, photosynthetically active radiation, barometric pressure, and precipitation.
Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1999.
Daily weather data file for Arctic Tundra LTER site at Toolik Lake. Included are daily averages and/or maximums and minimums of air, soil and lake temperature, wind speed, vapor pressure, and sum of global radiation and unfrozen precipitation recorded near Toolik Lake.
Hourly weather data from Toolik Field Station, ARC LTER, Alaska for 1999.
Hourly weather data from the Arctic Tundra LTER site at Toolik Lake. The following parameters are measured every minute and averaged or totaled every hour: air temperature and relative humidity at 1 and 5 meters, wind speed at 1 and 5 meters, wind direction at 5 meters, global solar radiation, photosynthetically active radiation, barometric pressure, and unfrozen precipitation.
Soil temperature data from the Toolik Tussock Experimental plots, Arctic LTER 1992.
Soil temperature data from the Toolik Tussock Experimental plots. In 1990 a Campbell CR21X datalogger was installed in block 2 of the Toolik LTER experimental tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in a control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized plots. All soil sensors are read every 15 minutes and averaged every 3 hours.
Daily summary of 10 cm soil temperatures in the Arctic LTER moist acidic experimental plots from 1998 to present, Toolik Lake Field Station, Alaska.
Daily summary of 10 cm soil temperatures in the Arctic LTER moist acidic experimental plots for the control (CT), greenhouse (GH), greenhouse plus nitrogen and phosphorus (GHNP) and nitrogen and phosphorus (NP) plots. Soil temperature probes in the tundra soil were problematic with frost heaving causing the depth of measurements to change. In order to provide a consistent year to year temperature record notes on changes in depths were used to select the temperature sensor that was within + or – 3 cm of the 10 cm and then averaged daily.
Toolik Inlet Discharge Data collected in summer 2004, Arctic LTER, Toolik Research Station, Alaska.
Open the record for dataset details and reuse information.
Hourly weather data from Toolik Field Station, ARC LTER, Alaska for 2006.
Hourly weather data from the Arctic Tundra LTER site at Toolik Lake. The following parameters are measured every minute and averaged or totaled every hour: air temperature and relative humidity at 1 and 5 meters, wind speed at 1 and 5 meters, wind direction at 5 meters, global solar radiation, photosynthetically active radiation, barometric pressure, and unfrozen precipitation.
Soil Moisture (Tensiometer) Measurements at LTER Floodplain Moisture Exclusion Treatment Plots: 1991-2003 (weekly)
Soil moisture measurements taken with tensiometers in both the control and rainout treatment plots at floodplain sites (FP3A, FP3B and FP3C); performed weekly during summer from 1991-2003.
Soil Moisture Tension Measurements at LTER Floodplain Successional Sites (FP1A,FP2A,FP4A): 1985-2003 (hourly)
Soil moisture tension readings were collected hourly during summer months at LTER Floodplain Successional Sites (FP1A, FP2A and FP4A) with a Campbell data logger from 1985 until 2003.
Forest floor chemistry, BCEF LTER sites, summer 1989 samples
The objective of this study is to evaluate forest floor chemistry in primary floodplain and upland secondary successional forests. Three replicate sites in each of three successional stages are being studied in upland and floodplain locations. Ten replicate samples of the forest floor were collected in each of the study sites. The 01 and 02 horizons were separated in each case. In addition to horizon and total biomass, structural organic chemistry, inorganic chemistry, and secondary plant chemical analysis will be conducted on these forest floor samples
Land cover classification of the CAP LTER study area at five-year intervals from 1985 to 2010 using Landsat imagery
The project aims to facilitate the long-term environmental change monitoring and social-ecological studies regarding urban sprawl and dynamics, urban heat islands, and outdoor water consumption, etc. Six land-use/land-cover (LULC) maps at 30 m resolution are created from 1985 to 2010 at five year intervals. Systematic object-based classification is utilized to ensure the map consistency and direct comparison capability over time. In the result, 11 land-use/land-cover classes are identified with an overall accuracy of 92.1%.
Phytoplankton growth and microzooplankton grazing rates from CCE LTER Process cruises in the California Current System, 2006 - 2017.
Rates of phytoplankton community growth and microzooplankton grazing on phytoplankton were assessed from chlorophyll a analyses of in situ dilution incubations as described in Landry et al. (2009). For each experiment (Array #), seawater was collected from predawn CTD (~2 a.m. local time) casts at 6-8 depths spanning the upper to lower euphotic zone. For each depth, we prepared a pair of polycarbonate bottles (2.7 L), one with whole seawater (100%), and one with 33% whole seawater (diluted with 0.1-µm filtered seawater) at each depth. Seawater was filtered directly from the Niskin bottles using a peristaltic pump, silicone tubing and an in-line Suporcap filter capsule that had previously been acid washed (10% trace-metal grade HCl followed by Milli-Q and seawater rinses). Dilution treatment bottles received pre-measured volumes of filtered water from the collection depths, and then were gently filled (silicone tubing below the water level) with unscreened water from the Niskin bottles. The filled bottles were tightly capped, placed into net bags and clipped onto attached rings at the depth of collection on a tether line attached to a satellite-tracked surface drifter (WOCE SVP) with a top strobe light, Globalstar telemetry and a 3-m holey-sock drogue centered at 15-m (mixed layer). Incubations were done in situ for 24-h (daily) to get daily averaged rates. In most cases, repeated experiments/deployments were done over the course of 2-5 days, using water collected each morning at the location of the drifter. These back-to-back experiments define experimental “cycles”. The second set of experiments were set up, before recovering the first. Hand recovery of the array, switching of net bags and redeployment was generally completed in 15-20 min. Rate estimates are based on initial and final subsamples (250 ml) taken for fluorometric analyses of Chl a. The samples were immediately filtered onto GF/F filters, and the Chl a extracted with 90% acetone in a dark refrigerator
Canopy size, gap size, plant height, and scaled height in NEAT plots at Jornada Basin LTER, Summer 2017
This data package contains estimates of vegetation indicators derived from UAV overflights and comparable field observatons at the NEAT experiment in the Jornada Basin of southern New Mexico, USA. The purpose of this study is to develop a UAV-based remote sensing method that can estimate vegetation indicators in arid and semiarid rangelands. This method was used to characterize six rangeland indicators (canopy size, bare soil gap size, plant height, scaled height, vegetation cover, and bare soil cover) in a semiarid grass-shrub ecosystem at the NEAT site. The drone-based estimates were validated with field measurements by using the standard transect methods (gap intercept, drop disk, and line-point intercept methods) in the spring and summer of 2017. Further, we use these results to show possible applications of drone-based products on arid and semiarid rangelands: the spatially explicit input of an ecological model, to detect and characterize non-stationarity, and to detect landscape anisotropy.
McMurdo Dry Valleys LTER: Phytoplankton water column profiles in Lake Bonney, Antarctica from 2004 to 2015
Lake Bonney (McMurdo Dry Valleys, east Antarctica) represents a year-round refugia for life adapted to extreme conditions. Lake level has risen by more than 3 m since 2004, but impacts of rapid lake level rise on phytoplankton community structure is also poorly understood. From 2004 to 2015, in concert with the summer limnological samplings, an in situ submersible spectrofluorometer (bbe FluoroProbe) was used to profile phytoplankton throughout the water columns of east and west lobes Lake Bonney to quantify the vertical structure of four functional algal groups (green algae, brown/mixed algae, cryptophytes, cyanobacteria). Our findings showed that phytoplankton communities were differentially impacted by physical and chemical factors over long-term vs. seasonal time scales. Following a summer of rapid lake level rise (2010-11), an increase in depth integrated chlorophyll a (chl-a) occurred in Lake Bonney caused by stimulation of photoautotrophic green algae. Collectively our data reveal that phytoplankton groups possessing variable trophic abilities are differentially competitive during seasonal and long-term time scales owing to periods of higher nutrients (photoautotrophs) vs. light/energy limitation (mixotrophs).
MCR LTER: Coral Reef: Coral larval data in support of Rivest and Hofmann 2015 JEMBE
In this study, lipid utilization and biological parameters of planula larvae of the cauliflower coral Pocillopora damicornis under future ocean conditions were examined using manipulative experiments. For the first 24 h following their release, planulae were cultured in seawater controlled to mimic a future ocean scenario (1030 μatm pCO2, 30.7 °C) as well as present-day, ambient ocean conditions (475 μatm pCO2, 28.1 °C; confirmed by autonomous sensors deployed at our study site). Abundance of wax ester, triacylglycerol, and phospholipids as well as traits of physiological status (total lipid, total protein, symbiont density, larval area, and larval length) were measured before and after incubations. These data are published in E.B. Rivest and G.E. Hofmann. 2015. Effects of temperature and pCO2 on lipid use and biological parameters of planulae of Pocillopora damicornis. Journal of Experimental Marine Biology and Ecology 473:43-52. These data are related to dataset knb-lter-mcr.5014, MCR LTER: Coral Reef: Seawater pH, Temperature and Depth Time Series from Bottom-mounted Sensors on the Fringing Reef, January-March 2012
Congruence checks for EML-described datasets in the Long Term Ecological Research (LTER) Network, Checks described as of 2015
These data are descriptions of all checks contributed to the LTER EML Congruence Checker as of late 2015. The EML Congruence Checker (ECC) informs contributors about the structure of the data package, indicating whether the asserted metadata accurately defines the data entity (table); this is called “structural congruence”. The checks and checking software are discussed in O'Brien, M. C, D. Costa and M. Servilla. 2016. Ensuring the quality of data packages in the LTER network data management system. Ecological Informatics. DOI: 10.1016/j.ecoinf.2016.08.001. Data are organized into a flat table, with one row per check. Each check is characterized with multiple typologies including priority, justification, scope (community), response behavior type and data packaging aspect. Operational information for software includes EML path, criteria for pass/fail, response expected, sample datasets for both pass and fail responses, with failure notes. Management fields indicate if the check has been implemented or not (as of paper publication), with dates when the check was added or updated.
High-Resolution Orthorectified Imagery from 1938, Niwot Ridge LTER Project Area, Colorado
Citation: Manley, W.F., Parrish, E.G., and Lestak, L.R., 2009, High-Resolution Orthorectified Imagery and Digital Elevation Models for Study of Environmental Change at Niwot Ridge and Green Lakes Valley, Colorado: Niwot Ridge LTER, INSTAAR, University of Colorado at Boulder, digital media. This image is a mosaic of orthorectified aerial photography from 1938 for the Niwot Ridge Long Term Ecological Research (LTER) project area at 0.3 m resolution. The 1946 companion mosaic covers the western portion of the Niwot LTER and Green Lakes Valley portion of the Boulder Creek Critical Zone Observatory (CZO) project area and was produced with maximum overlap of the 1938 mosaic. The mosaic has the qualities of a photograph and the functionality of a map layer for use in Geographic Information Systems (GIS) or remote sensing software. The mosaic is derived from approx. 1:20,000 scale, black and white (grayscale) photographs acquired by the United States Forest Service (USFS). The aerial photos were obtained as 1800 dpi digital scans from the Colorado Aerial Photo Service and then fully orthorectified in a Leica Photogrammetry Suite (LPS) bundle blockfile using a non-metric camera model, estimated focal length, calculated flying height and no fiducials. Individual photo frames were mosaiced with cutlines, then adjusted with additional geocorrection in ArcMap using a 3rd order polynomial warp, and clipped to the Niwot project extent area. The photography was registered to 2008 orthocorrected Denver Region Council of Governments (DRCOG) aerial photography. Horizontal accuracy is 7.0 m (RMSE, relative to the 2008 reference imagery, based on 4 independent check points). The mosaic covers an area of 55 km2 and is available in GeoTIFF format, in a UTM zone 13 projection and NAD83 horizontal datum, with FGDC-compliant metadata. The mosaic is available through an unrestricted public license, and can be obtained by request (see Distributor contact information below). Other datasets avai
High-Resolution Orthorectified Imagery from 1946, Niwot Ridge LTER Project Area, Colorado
Citation: Manley, W.F., Parrish, E.G., and Lestak, L.R., 2009, High-Resolution Orthorectified Imagery and Digital Elevation Models for Study of Environmental Change at Niwot Ridge and Green Lakes Valley, Colorado: Niwot Ridge LTER, INSTAAR, University of Colorado at Boulder, digital media. This image is a mosaic of orthorectified aerial photography from 1946 for the Niwot Ridge Long Term Ecological Research (LTER) project area at 0.3 m resolution. The image also covers the Green Lakes Valley portion of the Boulder Creek Critical Zone Observatory (CZO). The 1938 companion mosaic covers the eastern portion of the Niwot LTER project area and was produced with maximum overlap of the 1946 mosaic. The mosaic has the qualities of a photograph and the functionality of a map layer for use in Geographic Information Systems (GIS) or remote sensing software. The mosaic is derived from approx. 1:20,000 scale, black and white (grayscale) photographs acquired by the United States Forest Service (USFS). The aerial photos were obtained as 1800 dpi digital scans from the Colorado Aerial Photo Service and then fully orthorectified in a Leica Photogrammetry Suite (LPS) bundle blockfile using an air-photo camera model, a Digital Elevation Model (DEM), known focal length, and hand-measured fiducial coordinates. Individual photo frames were mosaiced with cutlines, then adjusted with additional geocorrection in ArcMap using a 2nd order polynomial warp, and clipped to the Niwot project extent area. The photography was registered to 2008 orthocorrected Denver Region Council of Governments (DRCOG) aerial photography. Horizontal accuracy is 1.8 m (RMSE, relative to the 2008 reference imagery, based on 6 independent check points). The mosaic covers an area of 63 km2 and is available in GeoTIFF format, in a UTM zone 13 projection and NAD83 horizontal datum, with FGDC-compliant metadata. The mosaic is available through an unrestricted public license, and can be obtained by request (see Distributo
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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.