This spreadsheet can be used to calculate the high and low frequency spectral corrections needed with eddy flux data. It implements the equations in Massman 2000 and 2001 (Agricultural and Forest Meteorology 104:185-198 and 107:247-251) using the spectral model of Horst 1997 & 2000 (Boundary-layer Meteorology 82:219-233 and 94:517-520).

Corrections are applied for both open- and closedpath analyzers. Necessary inputs are measurement height, time constant of running mean filter (if used), averaging period, and analyzer time constant (for a closedpath analyzer). Corrections (a number >1.0 that should be multiplied by the flux to give the corrected flux) are calculated as a function of mean wind speed (ubar). Full instructions are on the spreadsheet as well as some information for estimating the time constant of a LI6262 analyzer.

The file "spectral_corrections.xls" has 26,112 bytes. Download.

This is the spreadsheet that is mentioned in the following paper: Hollinger, D. Y.; Aber, J.; Dail, B.; Davidson, E. A.; Goltz, S. M.; Hughes, H.; Leclerc, M. Y.; Lee, J. T.; Richardson, A. D.; Rodrigues, C.; Scott, N.A.; Achuatavarier D.; Walsh, J. Spatial and temporal variability in forest-atmosphere CO2 exchange Global Change Biology. 10: 1-18, doi: 10.1111/j.1365-2486.2004.00847.x