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255 results for “C1”
Climate data for C1 data loggers (CR23X and CR1000), 2000 - ongoing, daily.
Climatological data were collected from the C1 climate station on Niwot Ridge (3018 m elevation) throughout the year. From 2000-06-24 to 2013-03-25, data were recorded using a Campbell Instruments CR23X data logger. Starting 2013-03-27, data were recorded using a Campbell Instruments CR1000 data logger. Maximum and minimum values were recorded instantaneously, with a sampling interval of 5 seconds. Daily means and totals were calculated from 17,280 individual measurements. The CR23X logger was programmed to generate both hourly and daily output. The CR1000 logger generated daily, hourly, and minute data until 2014-09-10, when these time periods were discontinued and only 10 minute raw data were collected.
Air temperature data for C1 chart recorder, 1952 - ongoing.
Temperature data were collected on a daily time-scale from the C1 climate station (3018 m) since 1952. Over time various circumstances have led to days with missing values. Some missing values were estimated from redundant sensors and nearby climate stations using various methods. Greenland 1987 was a basis for the methodology. However when it was not possible to use this methodology, new methods were developed.
Federal sampler data for Saddle and C1, 2016 - ongoing.
We use an aluminum Standard Federal Snow Sampler to measure snow depth and snow water equivalent (SWE). This device, compared to traditional snow pit techniques, provides efficient measurement capabilities that are less disruptive to the snowpack. Manual Federal Sampler measurements provide high accuracy point data to determine the amount of water in the surrounding snowpack. With a high downstream reliance on water within the regional snowpack, our weekly measurements give a time series of SWE throughout the winter season, offering consistent and dependable information for water resource planning and preparation.
Infilled daily precipitation data for C1 chart recorder, 1952 - ongoing.
Precipitation data have been collected at the C1 climate station (3022 m asl) almost continuously from 1952 to the present. C1 is on locally level terrain on the southeastern flank of Niwot Ridge, 9.7 km east of the Continental Divide. Surrounding vegetation is closed-canopy subalpine conifer forest. Through 1964, precipitation was recorded using an unshielded U.S. Weather Bureau standard totalizing gauge, with observations manually recorded on an approximately weekly basis. The gauge was located in an open area with sparse tree cover adjacent to the forest proper. Starting in late 1961, daily precipitation has been recorded using a Belfort Universal weighing-bucket gauge with chart recorder in an 8-m diameter clearing in the forest; the forest provides natural shielding for the gauge. The two records were assessed for an impact of this station change on record homogeneity and merged (see Methods). Missing daily data were infilled and multiday records were parsed to dailies (see Methods).
Infilled daily air temperature data for C1 chart recorder, 1952 - ongoing.
Daily minimum and maximum surface air temperature data have been collected at the C1 climate station (3022 m asl) almost continuously from 1952 to the present. C1 is on locally level terrain on the southeastern flank of Niwot Ridge, 9.7 km east of the Continental Divide. Surrounding vegetation is generally closed-canopy subalpine conifer forest. Temperature minima and maxima were measured with a chart-recording hygrothermograph housed in a Stevenson screen located in an open, sparsely treed area adjacent to the forest proper. Hygrothermograph records were calibrated at the time of chart changes against liquid-in-glass thermometers. Processing included quality checks and infilling of missing daily data (see Methods).
Climate data for C1 data logger (CR1000), 2015 - ongoing, 10 minute.
Climatological data are collected from the C1 climate station on Niwot Ridge (3018 m elevation) throughout the year. Starting 2015-01-01, the CR1000 logger was programmed to collect raw data at a 10 minute resolution. Maximum and minimum values were recorded instantaneously, with a sampling interval of 5 seconds. These data represent the native (ten minute) resolution data from that point onward, with quality flags applied but no data removed.
Precipitation data for C1 chart recorder, 1952 - ongoing.
Precipitation data were collected on a daily time-scale from the C1 climate station (3018 m) since 1952. Over time various circumstances have led to days with missing values. Some of these values were estimated from nearby climate stations.
STAR4BBS D3.1 Report on sustainability indicators for the monitoring system based on LCA_Appendix C1
<p><span>This appendix presents the full set of LCA indicators identified in D3.1 for the environmental pillar. These 56 indicators are the result of a search limited to highly relevant sources in the field (specified in D3.1) and were used for the final selection according to pre-established criteria.</span></p>
PrimeWater Virtual Lab: Experiment C1
<p><strong>Input and output data for Experiment C1 of PrimeWater's Virtual Lab.</strong></p> <p>Experiment Name: Assessing the relevance of hydrometeorological variables in data-driven forecasting of phytoplankton dynamics in surface waters</p>
Seasonal high-frequency measurements of discharge, water temperature, and specific conductivity from Commonwealth Stream at C1, McMurdo Dry Valleys, Antarctica (1993-2023, ongoing)
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the glacial meltwater streams in that region. This package contains data pertaining to continuous monitored water quality and quantity parameters measured with automatic recording devices on streams in this region. Specifically, this metadata record describes the hydrology data set for the McMurdo Dry Valleys' Commonwealth Stream at the C1 streamgage, located in the Fryxell Basin of Taylor Valley. This dataset extends through the first half of the 2022-23 field season.
Daily summarized seasonal measurements of discharge, water temperature, and specific conductivity from Commonwealth Stream at C1, McMurdo Dry Valleys, Antarctica (1993-2023, ongoing)
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the glacial meltwater streams in that region. This package contains daily summaries derived from 15-minute measurements of water quality and quantity parameters measured with automatic recording devices on streams in this region. Specifically, this metadata record describes the daily hydrological summaries for the McMurdo Dry Valley's Commonwealth Stream at C1, located in the Fryxell Basin of Taylor Valley. Measurements commenced during the 1993-94 austral summer and are ongoing. This dataset extends through the first half of the 2022-23 field season.
Menegoni et al. (2025) - Figs. C1, C2 and C3
<p>Supplementary figures representing the results of the Maximum Likelihood Estimator (MLE) based analysis of the discontinuity size and aperture of the different discontinuity sets performed using the FracPaQ functions (Healy et al., 2016; Rizzo et al., 2017). Figs. C1 and C2 refer to the discontinuity size of the discontinuities detected on the DOMs. Fig. C3 refers to the discontinuity aperture measured during fieldwork.</p> <p>Please, to more information refer to the following paper:</p> <div>Menegoni, N., Panara, Y., Greenwood, A., Mariani, D., Zanetti, A., & Hetényi, G. (in print). Fracture network characterisation of the Balmuccia peridotite using drone-based photogrammetry, implications for active-seismic site survey for scientific drilling. <em>Journal of Rock Mechanics and Geotechnical Engineering</em>. https://doi.org/10.1016/j.jrmge.2024.03.012</div>
Groundwater well chemistry data for Niwot Saddle, C1 and Martinelli, 2005 - ongoing.
This is a summary of major ion concentrations and chemistry data for groundwater samples collected at groundwater wells on the Niwot saddle, C1 site and Martinelli site.
Infilled climate data for C1, Saddle, and D1, 1990 - 2019, hourly.
This serially complete dataset includes hourly, quality-controlled, infilled meteorological data for three sites at the Niwot Ridge LTER: C1, Saddle, and D1, representing subalpine, alpine, and high-alpine environments, respectively. Raw observations of air temperature, relative humidity, wind speed, and incoming shortwave radiation were subjected to a rigorous hierarchical quality control and infilling protocol to make a robust, continuous dataset. Incoming longwave radiation was estimated using air temperature, relative humidity, and incoming shortwave radiation. Precipitation data were accessed from the Niwot Ridge LTER quality controlled datasets and Kittel et al. (2015). Precipitation values from C1 and Saddle were then corrected for gage undercatch (C1) and overcatch (Saddle) based on observations of snow accumulation at the Niwot SNOTEL station and snow pits located near the met stations (D1 precipitation data were not corrected as there were no available observation of snow accumulation). Daily precipitation values were temporally disaggregated to the hourly time step of the dataset. This dataset was originally created to force a physics-base snow model and is suitable for use in other research models that require hourly forcing data. Please contact the dataset's creators or the LTER data manager if you have any questions regarding the data or its applicability/suitability to your project. Disclaimer: These data come as-is with no warranty. The user must decide whether or not to use different variables and time periods within the dataset and whether further processing is warranted. In general, the data quality is higher and there are fewer infilled values from 2000 to 2013. The higher number of infilled entries before 2000 may preclude the 1990–1999 period from being used in a given analysis. This is particularly true for relative humidity and incoming solar radiation. The Niwot Ridge LTER is not responsible for the methodological choices made by those using
Climate data for C1 data logger (CR21X), 1986 - 2000.
Climatological data were collected from a Niwot Ridge climate station (C1) throughout the year using a Campbell Instruments CR21X data logger. Maximum and minimum values are recorded instantaneously, with the sampling interval being 30 seconds, until 28 January 1999 at which time the sampling interval was changed to 2 seconds. Daily averages and totals were calculated from 2880 individual measurements until 28 January 1999 and 43200 after that date. This instrument was programmed to generate both hourly and daily output. Parameters measured include solar radiation, air temperature, relative humidity, barometric pressure, wind speed, wind vector, wind direction, and UVB.
Throughfall and wet deposition N data for C1, 2001.
A field study at a Rocky Mountain spruce-fir-pine forest was undertaken to obtain measures of canopy nitrogen uptake. Wet deposition, dry deposition, and throughfall fluxes of ammonium and nitrate were measured during the 2001 growing season. Estimation of CNU, for both ammonium and nitrate, was obtained by subtracting throughfall (TF) flux from the sum of wet deposition (WD) and dry deposition (DD): CNU = WD+DD-TF. Total dissolved nitrogen was also determined for TF and WD samples. The organic nitrogen flux in WD and TF was determined by subtracting the inorganic N flux (sum of ammonium and nitrate fluxes) from total dissolved N fluxes.
Elevation gradient plant species composition data for A1, B1, C1, D1, 1953 - 1996.
Plant species presence and abundance (Kooiman and Korb data) were recorded at four stands along an elevational gradient in the Front Range of Colorado. Each stand location was determined by Dr. John Marr. The Marr species data were recorded from at least 12 3ft x 3ft plots located in the corners of his 66ft x 66ft tree quadrats. Only species presence was recorded, not abundance. The Kooiman and Lindhart as well as the Korb data were collected from 50 85cm x 100cm plots which were systematically located within a sampling strip measuring 2m x 100m. Plots were located every two meters alternating left and right of the sampling strip. Species present in the strip but not in the plots were recorded by Kooiman as well as Korb. Species names in this data set are from Weber and Wittman 1996; the Marr and Kooiman datasets were updated using Weber and Wittman's list.
Air temperature and solar radiation data for C1 data logger (DP211), 1993 - 2006.
Climatological data were collected from a Niwot Ridge climate station (C1) throughout the year using an Omnidata DP211 datapod. This instrument has a sample interval of 5 minutes and records averages of those 5-minute readings every 2 hours. Thus, daily totals represent totals of 288 values. Parameters measured were temperature (averages) and solar radiation (totals).
Climate data for C1 chart recorder, 1952 - 1982.
Climatological data were collected from a Niwot Ridge climate station (C1 at 3018 m) throughout the year. Parameters measured were temperature, relative humidity, solar radiation, precipitation, barometric pressure, and wind speed. The station was initially instrumented with a thermohygrograph (regularly calibrated and checked with maximum and minimum thermometers and psychrometers), which was equipped with a Bourdon tube (to measure temperature) and a banjo-spread hair element (to measure relative humidity). The thermohygrograph was situated in a white, all wood, louvered Stevenson screen which is oriented with the door facing north. The station was initially instrumented with a standard 8-inch precipitation gauge installed with the rim 1 m above ground. A recording precipitation gauge was installed in 1962, with the installation in the clearing positioned so that the gauge rim subtended an angle of 45 degrees to the tree crowns although the most effective angle is 30 degrees according to Leaf (1962). Precipitation was caught in a bucket containing ethylene glycol (to melt snow) and light oil (to prevent evaporation). As the weight of the bucket increased, a pen moved up via a spring mechanism and recorded on a rotating chart. Solar radiation was recorded on a bimetalic strip mechanical actinometer. Ninety percent of solar radiation from 360 to 2000 nm was transmitted through the instrument's glass dome. Barometric pressure was recorded on a Friez microbarograph at the Mountain Research Station at 2880 m. The instrument was calibrated against a full-range mercurial, Fortin-type barometer. The station was initially instrumented with a totalizing anemometer (approximately 0.7 m above the general level of tree crowns). Wind speed (peak gust) was subsequently measured with a 3-cup, AC-generating anemometer that continuously recorded onto an Esterline Angus strip chart recorder. Wind direction was recorded as a pen position on a continuously recording strip chart. The t
Climate data for C1 chart recorder, 1982 - 1988.
Climatological data were collected from a Niwot Ridge climate station (C1 at 3018 m) throughout the year. Parameters measured were temperature, relative humidity, solar radiation, barometric pressure, wind speed, and run of wind. The station was instrumented with a thermohygrograph (regularly calibrated and checked with maximum and minimum thermometers and psychrometers), which was equipped with a Bourdon tube (to measure temperature) and a banjo-spread hair element (to measure relative humidity). The thermohygrograph was situated in a white, all wood, louvered Stevenson screen which was oriented with the door facing north. Solar radiation was recorded on a bimetalic strip mechanical actinometer. Ninety percent of solar radiation from 360 to 2000 nm was transmitted through the instrument's glass dome. Barometric pressure was recorded on a Friez microbarograph at the Mountain Research Station at 2880 m. The instrument was calibrated against a full-range mercurial, Fortin-type barometer. Wind speed (peak gust) was measured with a 3-cup, AC-generating anemometer that continuously recorded onto an Esterline Angus strip chart recorder. Average wind speed was calculated from the peak gust trace. Run of wind was measured with a Belford totalizing cup anenometer with a counter (at a height of approximately 3 meters above ground). The thermohygrograph, actinometer, and microbarograph all used wind-up or battery-driven clock drives that rotated the recording chart on a right cylindrical drum with a fixed period between 24 h and 861 h depending on the gears used. These clock mechanisms were virtually identical and therefore completely interchangeable among the instruments.
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