LI-840 Infrared Gas Analyzer Downtime Resulting in Data Flags and Gaps
July 6, 2020
The LI-840 Infrared Gas Analyzer requires more maintenance and has an observed failure rate higher than other NEON sensors measuring atmospheric carbon dioxide and water vapor. This has led to multiple data gaps and periods of flagged data.
Many sites and time periods have been affected, we will update this post with specific instances within the next month. Increased monitoring has reduced the detection time of these issues, but downtime has been magnified by the suspension of field work due to COVID-19.
NaN values and raised quality flags occur in these data products, which are contained in the bundled eddy-covariance file (DP4.00200.001):
DP1.00100 H2O concentration - storage
DP1.00099 CO2 concentration - storage
DP2.00008 CO2 concentration rate of change
DP2.00009 H2O concentration rate of change
DP3.00009 CO2 concentration rate of change profile
DP3.00010 H2O concentration rate of change profile
DP4.00067 Carbon dioxide flux
DP4.00137 Latent heat flux
Please use the data portal contact form for further inquiries; select DP4.00200.001 or any of the constituent data products listed above in the Data Product dropdown list and include the term “PRB0040480“ in the body of your request
