This folder contains the ELUM network site data. Four routinely visited network field sites across the UK were instrumented to give high-resolution, temporal greenhouse gases (GHG) data.

Two types of measurement were used: Eddy Covariance (EC) and Chamber Techniques.

Eddy Covariance provides automated, highfrequency CO2 data by using an infra-red gas analyser, coupled with an anemometer, to monitor the CO2 emanating from an area of land ("the fetch"). The raw data requires significant processing and is sensitive to wind speed and direction, and rainfall. Eddy Covariance has the advantage of measuring the CO2 flux over large areas of growing vegetation.

Chamber measurements rely upon the enclosure of a small area within a gas-tight chamber. The gas is sampled and measured by a portable gas analyser, or can be taken back to a laboratory for analysis. This technique is low-frequency, but
has the advantage that it can analyse for CO2, N2O and CH4. Chambers cannot easily be used to monitor growing vegetation.

Folder contents:

chamber_data.csv = chamber data for all sites				
data_description_network_site_data.pdf = Data description for chamber and EC measurements. Includes column headings, units and descriptions.	
EC_Aberystwyth_Miscanthus.csv = EC data for Aberystwyth Miscanthus.		
EC_East_Grange_SRF.csv = EC data for East Grange short rotation forestry (SRF).
EC_Lincolnshire_Arable.csv = EC data for Lincolnshire arable.
EC_Lincolnshire_Miscanthus.csv = EC data for Lincolnshire Miscanthus.
EC_Lincolnshire_SRC_willow.csv = EC data for Lincolnshire short rotation coppice (SRC) willow.
EC_West_Sussex_Grass.csv = EC data for West Sussex grass.
EC_West_Sussex_SRC_willow.csv = EC data for West Sussex short rotation coppice (SRC) willow.