Turbulent fluxes (FESSTVaL supersite in Birkholz)

DOI:10.25592/uhhfdm.10563

Access

To get all files of a year, please use one of the links below to download a wget script - right click on link to save wget-file:
2021,

Dataset Author

Lange, Ingo; Ament, Felix;, Institution: Meteorologisches Institut, Universität Hamburg

Description

This data set contains level1 turbulence variables of the eddy-covariance station in Birkholz (Rietz-Neuendorf) during FESSTVaL 2021 from May to August. A full set of variables is provided including mean values, standard deviations and covariances of all wind components (u, v, w) and the sonic temperature. The original sampling frequency is 20 Hz. A humidity (and CO2) sensor was attached for retrieving water vapor and latent heat fluxes. All variables are calculated for 1 minute each. Further values are friction velocity and TKE.

Limitations: The data was processed by approved software including basic plausibility checks. Gaps in the data set can be caused by maintenance work, power loss, mal-function, or similar reasons. Single missing values are filled by interpolation. The turbulence values are calculated in accordance to VDI guidelines. No further corrections were applied. A description of the used formulas and plausibility checks exists and can be retrieved from the contact person. The LI-7500 does not work properly in the rain. Use the window contamination value (AGC) for filtering such periods.
Provenance: none
Comments:

Instrument 1

Source: 3D Sonic Anemometer METEK USA-1
Descriptive Instrument location: FESSTVaL supersite in Birkholz
Instruments altitude: 68 [m]
Coordinates (Latitude, Longitude): 52.20132 °N 14.19183 °E
Height: none [m]
Horizontal resolution: none [m]
Vertical resolution: none [m]
Time resolution: 60 [s]

Instrument 2

Source: H2O/CO2 Gas Analyzer LI-COR LI-7500
Descriptive Instrument location: FESSTVaL supersite in Birkholz
Instruments altitude: 68 [m]
Coordinates (Latitude, Longitude): 52.20132 °N 14.19183 °E
Height: none [m]
Horizontal resolution: none [m]
Vertical resolution: none [m]
Time resolution: 60 [s]

Global information

PID: de.hamburg.icdc/amd.de.fval/uhh.turb00.l1.any
Standard: SAMD v2.2, https://doi.org/10.25592/uhhfdm.9902
Project: FESSTVAL
Level: 1
Updated version: 00
File format: NETCDF4
Convention: CF-1.7 where applicable
Average File Size Uncompressed: 0.1 Mb
File name: fval_uhh_turb00_l1_any_v[VV]_[YYYYMMDDhhmmss].nc
Start: 2021-05-06
End: 2021-08-31

Variables

Name	Dimension	CF standard_name	long_name	Unit
co2ec	('time',)		mass_density_of_carbon_dioxide_ec	kg m-3
co2fs	('time',)		surface_upward_carbon_dioxide_flux_in_air	kg m-2 s-1
hfls	('time',)		surface_upward_latent_heat_flux	W m-2
hfss	('time',)		surface_upward_sensible_heat_flux	W m-2
huaec	('time',)		mass_density_of_water_vapor_ec	kg m-3
mfs	('time',)		momentum_flux	N m-2
tke	('time',)		turbulent_kinetic_energy	J kg-1
tsonic	('time',)		sonic_temperature	K
u	('time',)		u_component_of_wind	m s-1
ustar	('time',)		friction_velocity	m s-1
ut	('time',)		covariance_of_u_component_and_temperature	K m s-1
uv	('time',)		covariance_of_u_component_and_v_component	m2 s-2
uw	('time',)		covariance_of_u_component_and_w_component	m2 s-2
v	('time',)		v_component_of_wind	m s-1
vhw	('time',)		covariance_of_horizontal_and_vertical_wind_speed	m2 s-2
vt	('time',)		covariance_of_v_component_and_temperature	K m s-1
vw	('time',)		covariance_of_v_component_and_w_component	m2 s-2
w	('time',)		w_component_of_wind	m s-1
wt	('time',)		covariance_of_w_component_and_temperature	K m s-1
wvfs	('time',)		surface_upward_water_vapor_flux_in_air	kg m-2 s-1
zsl		altitude	altitude of station above sea level	m

Institution

Meteorologisches Institut, Universität Hamburg

Contact Person(s)

Ingo Lange (ingo.lange@uni-hamburg.de), Meteorological Institute, University of Hamburg

References

Lange, Ingo; Ament, Felix.: Standard meteorology Pressure, Temperature, Humidity, Radiation fluxes and Soil Heat Flux, and Turbulent fluxes (2021) from FESSTVaL Supersite in Birkholz, Germany (Version 00), (2022), http://doi.org/10.25592/uhhfdm.10563

Licence

This data is subject to the FESSTVaL data policy to be found at https://doi.org/10.25592/uhhfdm.9890 and in the SAMD Observation Data Product Standard https://doi.org/10.25592/uhhfdm.9902 .