Webinars

Accurate measurements of methane fluxes are needed to build a comprehensive understanding of the exchange of methane gas between ecosystems and the atmosphere. A great growth in methane flux measurements is expected in the coming decade. LI‑COR is hosting a webinar that discusses best practices for methane flux data collection and processing to assist researchers who are currently measuring methane fluxes or considering methane flux research. This webinar will cover these topics: methane measurement principles, using a methane analyzer for flux measurements, open-path analyzer advantages and challenges, spectroscopic effects and corrections, and data processing.

EddyPro™ 4.0 software presents many new features and processing options to the research community - improvements that meet the needs of a broad spectrum of users. In this webinar we introduce EddyPro 4.0 – the latest iteration of our popular eddy covariance software. This version introduces many new features, including the integration of biological and meteorological (biomet) data from your eddy covariance site, outputs of ensemble spectra and co-spectra, automatic time lag optimization, and customizable planar fit tools.

In the LI‑7550 software version 6, biomet data are logged in compressed eddy covariance data files called GHG files. These files are read directly by EddyPro™ 4.0, where they are summarized and used in flux computations. In this webinar we describe the biological and meteorological sensors that are frequently added to eddy covariance stations to measure soil properties, characteristics of light, and more. Highlights include collection and integration of biomet data with the LI-7550, as well as recommended sensors and systems.

Measurements from ancillary biological and meteorological (biomet) sensors are supplementary to eddy covariance flux measurements because they aid with the interpretation of results, they can be used in flux computations, and they are needed for some gap filling procedures. In this webinar we describe the importance of biomet data as a complement to high-frequency eddy covariance measurements. We also describe how to log biomet data with eddy covariance datasets using LI‑COR gas analyzers, and how to use biomet data in EddyPro™ 4.0.

这是关于涡度相关法的五次网上系列讲座的第一讲。由于地球气候变暖，深入理解大气和生物圈之间的温室气体和能量交换，比以往任何时候更重要。涡度相关法是一项用于该研究领域的先进的微气象观测技术。它为全球气候模型改进和生态系统管理决策提供不可缺少的数据资料和科学依据。这一次的讲座将讨论涡度相关法的基本理论，所需仪器，以及如何实施。我们将在这次讲座的最后一部分介绍涡度相关法的实际应用。在讲座期间，您可以在线随时提问。我们的专家组和主讲人将即时回答您的问题。

In this webinar we will describe measurements of methane emissions over an active landfill using the eddy covariance method. Methane emission rates were measured continuously for 18 months and were found to be highly dependent on barometric pressure variations. In this webinar we:

• Review the eddy covariance method and instrumentation
• Discuss the results of this study and present long-term data sets of methane emission rates
• Discuss the advantages of the eddy covariance technique for determining annual emission estimates from non-point sources

Join us to learn more about using the eddy covariance method to measure methane emissions from large, non-point sources, including landfills.

We invite you to join us for the conclusion of our 5-part series on the eddy covariance method. In this webinar we demonstrate EddyPro 3.0 eddy covariance data processing software, including:

• What's new in EddyPro 3.0
• Using advanced settings of EddyPro 3.0
• Where is EddyPro Express? How to use Express in EddyPro 3.0
• Abate execution time and speed up data processing

EddyPro 3.0 introduces advanced settings that give you the flexibility to choose how to process your eddy covariance data and select methods that are best for your site and research needs. Join us to learn how EddyPro 3.0 will simplify and standardize eddy covariance around a flexible, and easy-to-use software platform.

In this webinar, which is the fourth of a five part series on the eddy covariance method, you will learn about advanced data analysis, common corrections, and related topics, including:

• Fundamental theory for eddy covariance data processing
• Sources of errors and correction procedures
• Implementing corrections in the proper order

Eddy covariance systems are complex, involving multiple sensors that measure highly variable meteorological parameters. As a result, a number of corrections are needed in order to compute reliable flux estimates. Join LI‑COR application scientists as they describe how to use these corrections to improve flux calculations.

This is the third of five educational webinars on the eddy covariance method. Following up on the previous two webinars, we will demonstrate EddyPro Express eddy covariance data processing software. EddyPro Express will quickly take you from raw data files to publishable flux results in a just few steps. The demonstration will include:

• An end-to-end workflow for logging raw data to the LI‑7550 and computing flux results with EddyPro Express

• An explanation of EddyPro Express flux computations and corrections

• Processing GHG, ASCII, and TOB1 files with EddyPro Express

• EddyPro results — statistical files and computed fluxes

In this webinar, we will describe how to configure the LI‑7550 to log GHG files that include all the raw data and station information required to compute fluxes. Next, we will introduce EddyPro and discuss its origin, creation, and validation. We outline the steps involved in processing ASCII files, TOB1 files, and GHG files using EddyPro Express. Finally, we will describe how EddyPro Express processes data, and describe the output files that EddyPro Express provides.

This is the second of five educational webinars on the eddy covariance method.

Building from the first webinar, we will discuss key principles that affect design and implementation of an eddy covariance research site. Topics will include:

• Typical workflow for an eddy covariance experiment

• Concept of a flux footprint

• Key steps in design and implementation of an eddy covariance tower

This webinar will briefly review key points from the first webinar. Then we will cover the typical workflow for designing and implementing an eddy covariance station, and discuss the concept of the flux footprint. We will also address the key steps in implementing an eddy covariance station, including: field site selection, tower location, hardware preparation, placing of instrumentation, software, testing, data collection and retrieval, and maintenance planning.

This is the first of four educational webinars on the eddy covariance method.

As Earth's climate warms, understanding how greenhouse gases move between the atmosphere and biosphere is more important than ever. The eddy covariance method is a well-developed micrometeorological technique that is used to address this topic. The information it provides is invaluable for refining global climate models, and it can also help guide ecosystem management decisions. In this webinar, we will discuss the theory behind the technique and its advantages over other similar techniques. We also discuss the instrumentation used in eddy covariance systems and conclude with practical examples that show how they are implemented.

Wavelength Modulation Spectroscopy (WMS) is an established spectroscopic technique that LI‑COR has implemented in the new LI‑7700 Open Path Methane Analyzer. Recent advances in laser technology and engineering have enabled the use of WMS for this instrument. There are several distinct advantages that WMS provides for trace gas measurements, including the ability to operate at ambient pressure with a short optical path and still produce a strong signal with low noise. This webinar will discuss the WMS technique and how it is implemented in the LI‑7700. We will also discuss the advantages that WMS brings to field measurements of methane concentrations and fluxes.

LI‑COR is introducing a new high speed, high precision methane analyzer. This new open-path design provides a weatherized field ready solution with low power consumption that allows the user to make stable long term measurements of CH₄ densities for atmospheric research and for eddy covariance measurements. Unlike other methane analyzers, the LI‑7700 uses Wavelength Modulation Spectroscopy which allows for a high speed measurement that can be made at ambient pressure. This webinar will introduce the new LI‑7700 analyzer and explain how it has been designed for deployment anywhere that methane fluxes or concentrations need to be measured.

Both closed-path and open-path gas analyzers offer unique advantages for making eddy-covariance measurements. This new 'enclosed open-path' design provides a weatherized solution with low power consumption, allowing the user to make stable long-term measurements of CO₂ and H₂O densities. We will explain how the new LI‑7200 combines the best performance features from both closed-path and open-path gas analyzers for making flux measurements.

Both closed-path and open path CO₂/H₂O analyzers are widely used to measure the CO₂ and H₂O flux between an ecosystem and the atmosphere with the eddy-covariance technique. This webinar will discuss their strengths, advantages and different data processing procedures for the each type of analyzer when used for flux measurements.