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Category: LI-7700

How to Routinely Check an Eddy Covariance System to Ensure Normal Operation

How to Routinely Check an Eddy Covariance System to Ensure Normal Operation

Most eddy covariance (EC) systems are deployed in remote areas and exposed to harsh environmental conditions. During years-to-decades of continuous operation, potential issues related to contamination, power, animal damage, lightning, and other natural events such as fog and precipitation can arise. Aging of the hardware and out-of-date software could also become issues. In order to minimize data loss, routinely checking your EC system should be part of your maintenance plan. Considering time consumption and effectiveness, here are our recommendations:

  1. Check…

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Recent Publications using the LI-7700 Open Path Methane Analyzer

Recent Publications using the LI-7700 Open Path Methane Analyzer

The LI-7700 Open Path Ch4 Analyzer is a lightweight, low power, low maintenance analyzer  ideal for making high performance measurements in extreme environments. But don’t take our word for it – see how other researchers are using this analyzer to achieve high quality results:

  • Alberto, Ma C. R, Reiner Wassmann, Roland J. Buresh, James R. Quilty, Teodoro Q. Correa, Joseph M. Sandro, and Caesar A. R. Centeno. “Measuring Methane Flux from Irrigated Rice Fields by Eddy Covariance Method Using…

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Diagnostic Settings for the LI-7500/7500A/7200/7700 in EddyPro Software

Diagnostic Settings for the LI-7500/7500A/7200/7700 in EddyPro Software

Diagnostics are used to indicate whether your instrument is operating correctly. The LI-7500 and LI-7500A Open Path CO2/H2O Analyzers output integers between 0 and 255 that correspond to as many as 5 diagnostic values. The diagnostic values of the LI-7200 Enclosed CO2/H2O Analyzer and LI-7700 Open Path CH4 Analyzer are integers between 0 and 65535 that indicate up to 10 and 16 diagnostics, respectively. A detailed explanation of the diagnostic values for the LI-7500A and LI-7200 and how to decipher…

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LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

On May 13, the National Oceanic and Atmospheric Administration (NOAA) reported a preliminary daily average carbon dioxide (CO2) reading of 400.07 parts per million (ppm) at the Mauna Loa Observatory on the Big Island of Hawaii.

On May 9, a reading over 400 ppm was reported at the site for the first time ever. But that reading (400.03 ppm) was later revised to 399.89 ppm. The first CO2 measurement at the observatory was 313 ppm in 1958. According to the…

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Adjusting Timestamps for Daylight Savings Time (DST)

Adjusting Timestamps for Daylight Savings Time (DST)

In flux data analysis it is common to compare the local site data with data from other sites that are in regional or global flux networks (eg. AmeriFlux, FluxNet, AsiaFlux).  The issue of timestamp is important for such comparisons and using a time stamp that adjusts for Daylight Savings Time (DST) complicates the comparison because DST is not applied in all regions. Therefore the consensus in the community is to use standard time without adjusting for DST.

In the LI-COR…

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