| project: | Indianapolis flux project (INFLUX) |
| funding: | National Institute of Standards and Technology (NIST) |
| station_name: | INFLUX SITE 14 - Crawfordsville |
| observation_category: | Air sampling observation |
| country_territory: | USA |
| contributor: | PSU |
| number_of_sampling_heights: | 1 |
| website: | sites.psu.edu/influx/site-information/site-14-crawfordsville/ |
| parameter: | CO2 / CO |
| time_period: | 2017 |
| time_interval: | hourly averages |
| measurement_method: | Cavity Ring Down Spectroscopy (PICARRO, INC.) |
| sampling_type: | in situ |
| time_zone: | EST; data reported in UTC |
| reference_scale: | Traceable to NOAA scale |
| title: | In-situ tower greenhouse gas data (The Pennsylvania State University) at station Site 14 from 2017-04-26 to 2017-12-31 |
| ancillary_file_source: | site14_level1_2017_conc.dat |
| project_info: | ACT-America |
| institution: | Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) |
| contact_info: | https://daac.ornl.gov/ . E-mail: uso@daac.ornl.gov |
| doi: | 10.3334/ORNLDAAC/1568 |
| stipulations_on_use: | Data available with no restrictions. |
| featureType: | timeSeries |
| Conventions: | CF-1.6 |
| comment: | Measurements are made with Picarro Inc. wavelength-scanned cavityring down spectroscopic instruments at multiple levels. Hourly averages arereported here, with the minimum and maximum time included in the averageindicated. The standard deviation within the averaging window is alsoreported. All sites measuring CO are dried using a Nafion dryer and a dry airsource for purge. As of late May 2013, all sites are dried. A zero-offsetcorrection is applied daily, using data collected from 1 or 2 NOAA-calibratedtanks. Round robin tests using 3-4 NOAA-calibrated tanks are conducted every1-2 years. Results are then used to field calibrate the instruments (slope andintercept correction). |
| abstract: | The Indianapolis Flux Experiment (INFLUX) was designed to developand evaluate methods for the measurement and modeling of greenhouse gas fluxesfrom urban environments. Determination of greenhouse gas fluxes anduncertainty bounds is essential for the evaluation of the effectiveness ofmitigation strategies. The INFLUX observation network includes twelve in-situtower-based, continuous measurements of CO2, a subset of five of whichadditionally measure CO, and a subset of nine of which additionally measure CH4.Flask sampling of 14CO2 and other trace gases occurs at six of the towers, andperiodic aircraft flights measuring greenhouse gases and meteorologicalconditions are conducted. A total carbon column observing network (TCCON)column remote sensing station was deployed Aug - Dec 2012. Four of the towersites include eddy covariance and radiative flux measurements, and a scanningDoppler lidar is located near Site 02. The data from the towers, TCCON, andaircraft measurements are being used in an inverse-modeling approach to yieldestimates of the urban area flux at 1 km2 resolution. Additionally, very highspace/time resolution estimates of fossil fuel carbon emissions (Hestia project)offer state-of-the-art bottom-up emissions estimates for the city and itssurroundings. |
| location: | Tower base - 39.9971 N, 86.7396 W, 264 m ASL |
| time: | Array of 64 bit Reals [time = 0..5973] units: hours since 2015-01-01 00:00:00.0 UTC calendar: standard standard_name: time bounds: time_bnds |
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| site_name: | Array of Strings [name_strlen = 0..13] cf_role: timeseries_id |
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| CH4_std: | Grid _FillValue: -999. units: 1e-9 long_name: dry CH4 mixing ratio standard deviation between Time_start and Time_stop in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| CH4: | Grid _FillValue: -999. units: 1e-9 long_name: dry CH4 mixing ratio average between Time_start and Time_stop in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| CO: | Grid _FillValue: -999. units: 1e-9 long_name: dry CO mixing ratio average between Time_start and Time_stop in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| CO_unc: | Grid _FillValue: -999. units: 1e-9 long_name: estimated CO measurement uncertainty in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| longitude: | 64 bit Real standard_name: longitude long_name: site longitude units: degrees_east |
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| CO2_std: | Grid _FillValue: -999. units: 1e-6 long_name: dry CO2 mixing ratio standard deviation between Time_start and Time_stop in parts per million by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| latitude: | 64 bit Real standard_name: latitude long_name: site latitude units: degrees_north |
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| sampling_height: | 64 bit Real long_name: height above ground level standard_name: height units: m positive: up axis: Z |
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| Year: | Grid _FillValue: -999 units: year long_name: year of the measurement
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| CO_std: | Grid _FillValue: -999. units: 1e-9 long_name: dry CO mixing ratio standard deviation between Time_start and Time_stop in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| CH4_unc: | Grid _FillValue: -999. units: 1e-9 long_name: estimated CH4 measurement uncertainty in parts per billion by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| DOY: | Grid _FillValue: -999 units: d long_name: day of year of the measurement
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| altitude: | 64 bit Real long_name: height above sea level standard_name: height_above_mean_sea_level units: m |
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| Data_Flag: | Grid _FillValue: -999 long_name: data quality indicator standard_name: status_flag valid_range: 0, 1 flag_values: 0, 1 flag_meanings: not_recommended_for_use no_known_problems
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| Time_stop: | Grid _FillValue: -999. units: d long_name: maximum fractional day of year of the measurement
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| CO2: | Grid _FillValue: -999. units: 1e-6 long_name: dry CO2 mixing ratio average between Time_start and Time_stop in parts per million by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| H2O: | Grid _FillValue: -999. units: 1e-2 long_name: water vapor mixing ratio average of the dried sample between Time_start and Time_stop in parts per hundred by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
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| Hour: | Grid _FillValue: -999 units: hour long_name: nominal hour of the measurement
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| Time_start: | Grid _FillValue: -999. units: d long_name: minimum fractional day of year of the measurement
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| time_bnds: | Grid
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| CO2_unc: | Grid _FillValue: -999. units: 1e-6 long_name: estimated CO2 measurement uncertainty in parts per million by volume coordinates: time latitude longitude altitude site_name ancillary_variables: Data_Flag
|