Archive for November, 2011

EddyPro Units – Distinguishing Between Molar Density, Mole Fraction, and Mixing Ratio

Wednesday, November 16th, 2011

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Confused by the units provided by your gas analyzer? Which units should you use when processing eddy covariance data sets in EddyPro? This chart summarizes the definition of units, different ways to express measurements, and which instruments record data in which units. Measurement Type Intended Meaning Common Units Typical Instruments Molar Density • A measurement…

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Posted in EddyPro, LI-6262, LI-7000, LI-7200, LI-7500A, LI-7700, Tech Tips | No Comments »

Building Carbon Budgets for Hawaii’s Forests

Wednesday, November 9th, 2011

Quantifying how rising temperatures will impact soil carbon storage is crucial to predicting the future effects of CO2. Globally, soils contain more carbon than above-ground vegetation and the atmosphere combined. A research team led by Dr. Creighton M. Litton of the University of Hawaii aims to build carbon budgets for Hawaii’s forests, detailing the carbon…

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Posted in Soil Flux | No Comments »

Configuring the CSAT3 for Data Logging in .ghg Format

Wednesday, November 2nd, 2011

A CSAT3 sonic anemometer (Campbell Scientific, Inc., Logan, UT) can be configured to log raw flux data in conjunction with an LI-7500A or LI-7200 infrared gas analyzer from LI-COR in a compressed .ghg file format. The .ghg file format makes it possible to continuously collect raw flux data for more than two months on a…

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Posted in EddyPro, LI-7200, LI-7500A, Tech Tips | No Comments »