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START readme
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The readme file is a document that accompanies the dataset. It provides an explanation of the dataset, 
making the dataset understandable and reusable. 

This document explains the different sections of the readme template. 
Some sections may not be applicable to your dataset; you can delete  these sections from the file. 
Save the template as README.txt. 


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## Title
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2023 eddy covairance data from Johnstown Castle (2)


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## Methods and Materials
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The experimental site, Johnstown Caste, is located in the South-East of Ireland, in Co. Wexford. (52.30°N, 6.40°W, 67 m above sea level).The mean ± standard deviation annual air temperature and rainfall (2009 – 2018) for this region is 10 ± 4 °C and 952 ± 352 mm, respectively
The field site consists of a perennial ryegrass (Lolium perenne) paddock (paddock 14 on the dairy platform in Johnstown Castle), where the EC tower was positioned in the North-East part of the field site to maximize the footprint contribution from the prevailing South-Westerly wind direction 
The field site is intensitively stripped grazing by holstein fresian animals. A describtion of the management is enclosed in the document "2023_JC2_Managmeent_Data".
 
An eddy covairnace mast was installed with a 3-D sonic anemometer (Gill Windmaster Pro) coupled with an enclosed infrared gas analyser (IGRA) (LI-7200RS) mounted at 2.8 m to measure fluctuations in the 3-D wind components and gas concentrations of CO2 and H2O at a frequency of 10 Hz.  
Greenhouse concentration data was logged to the LI7200RS Analazer Interface Unit (AIU). Raw data was processed using the eddypro engine (LICOR, version 7.0.6). Processing


Raw half-hourly GHG fluxes were statistically evaluated and screened as outlined in Vickers and Mahrt (1997).
 Double rotation was performed to compensate for the anemometer tilt by nullifying the average cross-stream and vertical wind components (Kaimal and Finnigan, 1994). 
Spectral attenuation effects following analytic methods described in Fratini et al. (2012) and Moncrieff et al. (2004) determined low and high-pass spectral correction factors for the data, respectively. 
Air density fluctuations were accounted for according to Webb et al. (1980) for CO2
Random uncertainty was calculated according to Finkelstein and Sims (2001) 
The flux footprint contribution was calculated according to Kljun et al. (2004) 

For technical queries on the tower contact James Rambaud, George Gleasure, Rachael Murphy or Morad Mirzaee
For data queries contact Rachael Murphy and Morad Mirzaee

Referneces 
Fratini, F., A. Ibrom, N. Arriga, G. Burba, D. Papale. 2012. Relative humidity effects of water vapour fluxes measured with closed-path eddy-covariance systems with short sampling lines. Agriculture and Forest Meteorology, 165: 53-63.
Finkelstein, P. L., and P. F. Sims. 2001. Sampling error in eddy correlation flux measurements. Journal of Geophysical Research, 106: 3503-3509.
Moncrieff, J. B., R. Clement, J. Finnigan, and T. Meyers. 2004. Averaging, detrending and filtering of eddy covariance time series, in Handbook of micrometeorology: a guide for surface flux measurements, eds. Lee, X., W. J. Massman and B. E. Law. Dordrecht: Kluwer Academic, 7-31.
Webb, E. K., G. I. Pearman, and R. Leuning. 1980. Correction of flux measurements for density effects due to heat and water vapor transfer. Quarterly Journal of the Royal Meteorological Society, 106: 85–100.
Vickers, D. and L. Mahrt. 1997. Quality control and flux sampling problems for tower and aircraft data. Journal of Atmospheric and Oceanic Technology, 14: 512-526.
Kaimal, J. C., J. C. Wyngaard, Y. lzumi, and O. R. Coté. 1972. Spectral characteristics of surface-layer turbulence. Quarterly Journal of the Royal Meteorological Society, 98: 563-589.
Kljun, N., P. Calanca, M. W. Rotach, and H. P. Schmid. 2004. A simple parameterisation for flux footprint predictions. Boundary-Layer Meteorology, 112: 503-523.
[Example structure representation (delete this explanation and example):




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## Software, and Code
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Software Required:

Eddypro engine version 7.0.6



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## FileFormats
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.csv
.excel sheet


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## CodeBook
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Please view codebook.csv (where this readme file is also found) for documentation of abbreviations, 
column names, datapoints, etc. 
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## Other
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Licenses/restrictions placed on the data: 
The data is licenced for reuse under a Creative Commons 4.0 licence CC-BY-NC (https://creativecommons.org/licenses/by-nc/4.0/). 

# DISCLAIMER 
Teagasc makes no representations or warranties regarding the accuracy,completeness, or fitness for purpose of the information contained in this
dataset and accepts no liability for any loss or damage arising from its use or reuse.

# COPYRIGHT
© 2026 Teagasc (Agriculture and Food Development Authority of Ireland)


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END readme
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