Globally, fluxes of CO2 from soils account for a significant release of carbon to the atmosphere and play an important role in the carbon cycle. Measurement of soil CO2 flux is important in many research areas, including our understanding of global climate change. This webinar is the first in a series from LI‑COR Biosciences describing the processes behind soil CO2 flux and measurement techniques. We will introduce the basic concepts of soil CO2 flux, including the effects of pressure, moisture and soil porosity on observed rates.
Soil CO2 production is the sum of respiration from heterotrophic and autotrophic organisms in the soil, and it is strongly temperature dependent. On a seasonal scale, soil CO2 production depends on soil moisture content, organic matter content, plant growth, and other factors. Because soil is resistant to gas transport, a strong CO2 concentration gradient exists across the soil profile. This gradient is a major driving force for soil CO2 flux. Two techniques are commonly used to measure soil CO2 flux: chamber-based systems (open and closed) and gradient methods. In this webinar, we discuss the requirements of chamber-based closed soil CO2 flux systems in detail.
May 20, 2013
Advantages of Automated Soil CO2 Flux Measurements
Measurement scale, in both physical and temporal space, is an important consideration when collecting soil CO2 flux data. Survey measurements, which are collected at single points in time, record instantaneous events at a study sight. Automated and multiplexed long-term measurements, however, provide powerful insight into trends and unusual events that often go undetected in survey measurements. In this webinar, you will learn about:
• Important differences between survey and long-term soil CO2 flux measurements
• How to identify trends and discrete, but important, gas exchange events in long-term data sets
• How multiplexed measurements can help identify sources of variation in a study site
Jun 3, 2013
Quality Assurance and Quality Control of Soil CO2 Flux Datasets
Verify the quality of your data collected with the LI‑8100A Automated Soil CO2 Flux System. Learn how to use the FV8100 software to:
• Validate the quality and consistency of raw data
• Distinguish between biologically important outliers and measurement artifacts
• Filter large datasets to omit artifacts
Scientific instruments can collect a daunting amount of data. How can you ensure that the data is high quality? Bring your questions and join us for this webinar presented by Rick Garcia, Senior Applications Scientist.
This webinar highlights a new feature that allows you to integrate spatial data with CO2 flux and concentration measurements made with the LI‑8100A Automated Soil CO2 Flux System. In this webinar we will:
• Discuss the differences between flux and concentration mapping
• Discuss research and industrial applications that benefit from this technique
The LI‑8100A System is the most widely used research tool for soil CO2 flux measurements in the world. Join us for this webinar to learn more about how the CO2 Mapping feature can benefit your research.
The LI‑8100A Automated Soil CO2 Flux System can be used in a number of different research applications. The system can be configured for Survey, Long-term or Multiplexed CO2 Flux measurements, Atmospheric CO2 Profiling, Flask Measurements in the lab,and Collecting samples for soil trace gas flux. The LI‑8100A has a high CO2 range of 0-20,000ppm that opens up the possibility of measuring leaks in carbon capture and storage projects and fluxes in and around hotspots such as volcanos. LI‑COR is also introducing the new 8100-104C Clear Chamber, which will open up the possibility to do Net Ecosystem Exchange measurements on the soil surface. Learn how the LI‑8100A System can benefit you in your research.
Sept 1, 2009
Monitoring Instrumentation for Carbon Capture and Storage Projects:
A simple method of rapidly sampling CO2 fluxes from multiple samples, and tracking fluxes over a desired period of time. Examples include respiration of detached fruit or attached leaves and fruit, monitoring single or multiple insect or animal respiration and small or isolated soil sample respiration.
These highlight techniques that help you get the most out of the LI‑6400XT Portable Photosynthesis System, including details of photosynthesis measurements and custom techniques not covered anywhere else.
OPEN 6.2 adds exciting new features to the LI‑6400XT Portable Photosynthesis System, including control of intracellular CO2 concentrations (Ci), the ability to make nested two-factor response curves, and more. In this webinar, Elizabeth Gordon, Senior Applications Analyst, reviews these new features and other updates to the LI‑6400XT system.
The LI‑6400XT is the most frequently referenced photosynthesis system in scientific literature. Learn how these exciting new features expand the power of the LI‑6400XT platform.
• The importance of controlling relative humidity in the leaf chamber
• The effect of temperature on gas exchange measurements
• Strategies for controlling humidity and temperature
Understanding and controlling conditions in the leaf chamber is essential for accurate gas exchange measurements, especially when measuring photosynthesis rates of plants that are highly sensitive to environmental conditions. In this webinar, we discuss the effects of temperature and humidity on gas exchange measurements and provide strategies for controlling them in the LI‑6400/XT leaf chamber.
With the field season approaching it's important to refresh your memory on how to prepare your instrument.
Dust off your LI‑6400/XT and join LI‑COR scientists for a live video broadcast and discussion on ensuring high quality measurements all season. Shannon Loriaux, LI‑COR applications scientist, will remind you how to keep your instrument in top performance. Topics include:
• Preparing stored instruments for measurements
• Conducting important pre-season hardware checks
Bring your questions. Shannon, or another scientist, will be answering them live.
Exploring and understanding the increased efficiency of C4 plants is important to meet the growing world demands for food and fuel. Assessment of biochemical efficiency at low CO2 concentrations is used for both basic understanding of the biochemical CO2 concentrating mechanism and for characterization of genetic populations. We will demonstrate how the LI‑6400/LI‑6400XT Portable Photosynthesis and Fluorescence System can be modified to control chamber CO2 at very low concentrations (down to 1ppm) by reconfiguration of the flow path.
Mar 16, 2010
Designing a Gas-Exchange Chamber: What should I consider?
In this webinar we address some important considerations for designing chambers for gas-exchange measurements. The information presented will be particularly relevant to users looking to design custom chambers for the LI‑6400XT or LI‑8100, or those building gas exchange systems around any of LI‑COR Biosciences stand alone gas analyzers. Topics covered will address potential design pitfalls and resulting measurement errors, in an effort to provide users a frame work for optimizing their custom chamber designs.
LI‑6400XT Users Unite! This webinar has been designed to help users get the most out of their LI‑6400XT. You are certain to come away with new insight. We'll focus on ten quick tips for improving your use of the LI‑6400XT Portable Photosynthesis System.
Photosynthesis consists of gathering light energy and then using that energy to fix carbon dioxide. Measuring fluorescence enables further exploration of both the light and dark reactions of photosynthesis. Perform simultaneous Gas Exchange and Fluorescence measurements over the same leaf area.
Webinars cover a variety of topics related to ecosystem-level gas exchange, including details on the eddy covariance method, EddyPro data analysis software, eddy covariance system configurations, and more.
Mar 27, 2013
Best Practices for Methane (CH4) Flux Measurements
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.
Sep 5, 2012
Biomet Data Processing and Advanced Features of EddyPro™ 4.0
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.
Aug 29, 2012
Using Biomet Sensors in LI‑COR Eddy Covariance Systems
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.
Aug 15, 2012
Overview of Biological and Meteorological Sensors in Eddy Covariance Flux Research
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.
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.
Dec 14, 2011
The Eddy Covariance Method:
EddyPro 3.0 Data Processing Software with Advanced Settings
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.
Jan 12, 2010
Measuring Principles of the LI‑7700 Trace Gas Analyzer
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.
Nov 24, 2009
An Introduction to the New LI‑7700 Open-Path Methane Analyzer
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.
Oct 27, 2009
An Introduction to the New LI‑7200 Enclosed CO2/H2O Analyzer
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.
Oct 13, 2009
Open Path vs. Closed Path Gas Exchange 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.
Plants convert light energy from the sun into usable forms through photosynthesis. In this webinar we will discuss the definition of photosynthetically active radiation (PAR), as well as different sensor types which have been used to measure PAR. We will present how differences in sensitivities of these sensors can introduce significant errors when measuring light from artificial sources or in conditions other than direct sunlight.
Feb 16, 2010
Bringing Research Instruments into Ecology Classrooms
It's easy with the right strategy! By providing your students with research grade instrumentation, you will be encouraging them to ask questions and providing them the means to find answers. This webinar will discuss what to look for in instrumentation, how to find funding for these instruments, and most importantly how to use them successfully in the classroom (including classroom setup and strategies, as well as specific laboratory activities). We will look at how other innovative institutions (large and small) have been successful at incorporating instruments, and how they solved challenges along the way. Focus will be on instrumentation for Biology and Ecology courses.
The LAI-2200 can be used in many canopy types including forests, grasslands, row crops, hedges, and isolated trees. The webinar will focus on the terminology and theory behind the LAI-2200 including an explanation on The Gap Fraction Method. Explanations on the difference between the LAI-2200 calculations, Ceptometry and Hemispherical Measurements will also be discussed.