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Dataset Title:	Turbulent parameters at the Amundsen-Nobile Climate Change Tower (Svalbard)
Institution:	CNR   (Dataset ID: turbulence_cct)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
station_id	!= =~ <= >= = < >		!= =~ <= >= = < >		"cct"	"cct"
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		78.92136	78.92136
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		11.86587	11.86587
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2021-01-01T00:00:00Z	2022-12-31T23:30:00Z
Wind_speed_average_30min (m/s)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	26.77537
Wind_direction_average_30min (degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.02365	359.9911
Friction_velocity_30 (m/s)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.01049	3.34108
Friction_velocity_2 (m/s)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	1.49261
Heat_flux_30 (W/m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.7491	2.091994
Heat_flux_2 (W/m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.3011	0.4905
NaN_percentage (percentage)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	99.4222
Flag_dir (1)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	1
Roughness_length (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	0.310175

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" station_id latitude longitude time Wind_speed_average_30min Wind_direction_average_30min Friction_velocity_30 Friction_velocity_2 Heat_flux_30 Heat_flux_2 NaN_percentage Flag_dir Roughness_length station_id latitude longitude time Wind_speed_average_30min Wind_direction_average_30min Friction_velocity_30 Friction_velocity_2 Heat_flux_30 Heat_flux_2 NaN_percentage Flag_dir Roughness_length station_id latitude longitude time Wind_speed_average_30min Wind_direction_average_30min Friction_velocity_30 Friction_velocity_2 Heat_flux_30 Heat_flux_2 NaN_percentage Flag_dir Roughness_length station_id latitude longitude time Wind_speed_average_30min Wind_direction_average_30min Friction_velocity_30 Friction_velocity_2 Heat_flux_30 Heat_flux_2 NaN_percentage Flag_dir Roughness_length station_id latitude longitude time Wind_speed_average_30min Wind_direction_average_30min Friction_velocity_30 Friction_velocity_2 Heat_flux_30 Heat_flux_2 NaN_percentage Flag_dir Roughness_length ")

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .dods - OPeNDAP clients use this to download the data in the DODS binary format. .esriCsv - Download a ISO_8859_1 .csv file for ESRI's ArcGIS 9.x and below (separate date and time columns). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .geoJson - Download longitude,latitude,otherColumns data as a UTF-8 GeoJSON .json file. .graph - View a Make A Graph web page. .help - View a web page with a description of tabledap. .html - View an OPeNDAP-style HTML Data Access Form. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each response column becomes a wave. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .jsonlCSV - View a UTF-8 JSON Lines CSV file without column names (mv = 'null'; times are ISO 8601 strings). .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .mat - Download a MATLAB binary file. .nc - Download a flat, table-like, NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncCF - Download a NetCDF-3 CF Discrete Sampling Geometries file (Contiguous Ragged Array). .ncCFHeader - View the UTF-8 header (the metadata) for the .ncCF file. .ncCFMA - Download a NetCDF-3 CF Discrete Sampling Geometries file (Multidimensional Array). .ncCFMAHeader - View the UTF-8 header (the metadata) for the .ncCFMA file. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .odvTxt - Download longitude,latitude,time,otherColumns as an ISO-8859-1 ODV Generic Spreadsheet File (.txt). .subset - View an HTML form which uses faceted search to simplify picking subsets of the data. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .wav - Download a .wav audio file. All columns must be numeric and of the same type. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. Times are ISO 8601 strings. .kml - View a .kml file, suitable for Google Earth. .smallPdf - View a small .pdf image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .smallPng - View a small .png image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .largePng - View a large .png image file with a graph or map. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend).

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  station_id {
    String actual_range 
"cct
cct";
    String cf_role "timeseries_id";
    String long_name "Id of the station in the TimeSeries";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 78.92136, 78.92136;
    String axis "Y";
    String ioos_category "Location";
    String long_name "latitude position of the station";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 11.86587, 11.86587;
    String axis "X";
    String ioos_category "Location";
    String long_name "longitude position of the station";
    String standard_name "longitude";
    String units "degrees_east";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6094592e+9, 1.6725294e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date and time of the measurement";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  Wind_speed_average_30min {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 26.77537;
    String comment "See full report.";
    String ioos_category "Unknown";
    String long_name "Wind speed vectorial average over 30 min measured at 10 m a.g.l.";
    String standard_name "wind_speed";
    String units "m/s";
  }
  Wind_direction_average_30min {
    Float32 _FillValue NaN;
    Float32 actual_range 0.02365, 359.9911;
    String comment "See full report.";
    String ioos_category "Unknown";
    String long_name "Wind direction average over 30 min measured at 10 m a.g.l.";
    String standard_name "wind_from_direction";
    String units "degrees";
  }
  Friction_velocity_30 {
    Float32 _FillValue NaN;
    Float32 actual_range 0.01049, 3.34108;
    String comment "See full report";
    String ioos_category "Unknown";
    String long_name "Friction velocity over 30 min";
    String standard_name "friction_velocity_in_air";
    String units "m/s";
  }
  Friction_velocity_2 {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 1.49261;
    String comment "Statistics calculated over 2 min are averaged over 30 min. See full report.";
    String ioos_category "Unknown";
    String long_name "Friction velocity over 30 min, obtained from 2 min values";
    String standard_name "friction_velocity_in_air";
    String units "m/s";
  }
  Heat_flux_30 {
    Float32 _FillValue NaN;
    Float32 actual_range -0.7491, 2.091994;
    String ioos_category "Unknown";
    String long_name "Turbulent heat flux over 30 min";
    String standard_name "sensible_heat_flux_in_air";
    String units "W/m^2";
  }
  Heat_flux_2 {
    Float32 _FillValue NaN;
    Float32 actual_range -0.3011, 0.4905;
    String comment "Statistics calculated over 2 min are averaged over 30 min. See full report.";
    String ioos_category "Unknown";
    String long_name "Turbulent heat flux over 30 min, obtained from 2 min values";
    String standard_name "sensible_heat_flux_in_air";
    String units "W/m^2";
  }
  NaN_percentage {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 99.4222;
    String comment "See full report.";
    String ioos_category "Unknown";
    String long_name "Percentage of not valid values, excluded on the basis of the quality control checks.";
    String units "percentage";
  }
  Flag_dir {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 1;
    String comment "See full report.";
    String ioos_category "Unknown";
    String long_name "Boolean value that indicates if values are disturbed by CCT structure due to the wind direction.";
    String standard_name "status_flag";
    String units "1";
  }
  Roughness_length {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.310175;
    String comment "See full report.";
    String ioos_category "Unknown";
    String long_name "Roughness length assuming a typical log wind profile under statically neutral conditions.";
    String standard_name "surface_roughness_length";
    String units "m";
  }
 }
  NC_GLOBAL {
    String acknowledgement "The dataset is provided in the framework of the SIOS core data curation call [Research Council of Norway, project number 2022_SCD_01, Svalbard Integrated Arctic Earth Observing System - Knowledge Centre, operational phase]";
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id,latitude,longitude";
    String Conventions "ACDD-1.3, COARDS, CF-1.6";
    String creator_email "mauro.mazzola@cnr.it";
    String creator_name "CNR";
    String creator_type "institution";
    String creator_url "https://iadc.cnr.it";
    Float64 Easternmost_Easting 11.86587;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 78.92136;
    Float64 geospatial_lat_min 78.92136;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 11.86587;
    Float64 geospatial_lon_min 11.86587;
    String geospatial_lon_units "degrees_east";
    String history 
"Wind components and sonic temperature measurements were used to estimate friction velocity and kinematic heat flux. Before computing the micrometeorological parameters, a preliminary analysis is applied in order to assess the data quality and to remove low quality records. The quality control procedure (inspired to Zahn et al. (2016)) was applied to 30-minute data blocks following different steps: (i) COMPLETE RECORD TEST; (ii) BOUND TEST; (iii) SPIKES TEST; (iv) STATIONARITY TEST; MISSING VALUE TEST (v). See full report for the details.
2024-12-22T13:17:31Z (local files)
2024-12-22T13:17:31Z https://data.iadc.cnr.it/erddap/tabledap/turbulence_cct.html";
    String infoUrl "https://iadc.cnr.it";
    String institution "CNR";
    String keywords "friction velocity, micro-meteorology, roughness length, sensible heat flux, turbulence";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "CC BY-NC: This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator.";
    Float64 Northernmost_Northing 78.92136;
    String product_version "2022";
    String references "Mahrt, L., 1998. Flux Sampling Errors for aircraft and towers. J. Atmos. Ocean. Technol. 15, 416-429. Mc Millen, R.T., 1988. An Eddy correlation technique with extended applicability to non-simple terrain. Boundary-Layer Meteorol. 43, 231-245. Vickers D, Mahrt L. 2006. A solution for flux contamination by mesoscale motions with very weak turbulence. Boundary-Layer Meteorol. 118: 431-447. https://doi.org/10.1007/s10546-005-9003-y. Zahn, E., Chor, T.L., Dias, N. L., 2016. A Simple Methodology for Quality Control of Micrometeorological Datasets. American Journal of Environmental Engineering  6(4A): 135-142 DOI: 10.5923/s.ajee.201601.20.";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 78.92136;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Turbulent parameters are measured at the Amundsen-Nobile Climate Change Tower (CCT) by means of a Gill R3 sonic anemometer installed at 7.5 m from the ground since 2010. It measures the three components of the wind (u, v and w measured in m/s) and the sonic temperature (expressed in Kelvin degrees) at a rate of 20 Hz. These micro-meteorological measurements are complemented by standard meteorological ones at 4 levels: 2, 5, 10 and 33 m (acquisition time step 1 minute).";
    String time_coverage_end "2022-12-31T23:30:00Z";
    String time_coverage_start "2021-01-01T00:00:00Z";
    String title "Turbulent parameters at the Amundsen-Nobile Climate Change Tower (Svalbard)";
    Float64 Westernmost_Easting 11.86587;
  }
}

 

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