**Overview** This dataset provides fast response wind and virtual sonic temperature data. **Data Details** Each meteorological (met) station has one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) has been verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. The sonic anemometer has been oriented to magnetic North. The serial data stream is transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The current version of the data is ".a0." level. All evidently erroneous and/or broken lines were marked as bad and/or replaced with a "baddata" place holder, the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The data have been prepared for processing with EddyPro and stored in ASCII comma delimited files formatted as follows: u,v,w,T,qc where: * "u, v, w" are the three wind components (m/s) * "T" is the sonic virtual temperature (C) * "qc" is basic quality control code: 0 - OK, 1 - sonic bad data code, 2 - broken data line, and 3 - missed line. Baddata place holder is 99.99 **NOTE**: No attempt has been made to fill gaps in the data. **Data Quality** * Includes raw data with basic quality control (QC) applied. * All housekeeping fields removed.

**Overview** This dataset provides fast response wind and virtual sonic temperature data. **Data Details** Each meteorological (met) station has one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) has been verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. The sonic anemometer has been oriented to magnetic North. The serial data stream is transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The current version of the data is ".a0." level. All evidently erroneous and/or broken lines were marked as bad and/or replaced with a "baddata" place holder, the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The data have been prepared for processing with EddyPro and stored in ASCII comma delimited files formatted as follows: u,v,w,T,qc where: * "u, v, w" are the three wind components (m/s) * "T" is the sonic virtual temperature (C) * "qc" is basic quality control code: 0 - OK, 1 - sonic bad data code, 2 - broken data line, and 3 - missed line. Baddata place holder is 99.99 **NOTE**: No attempt has been made to fill gaps in the data. **Data Quality** * Includes raw data with basic quality control (QC) applied. * All housekeeping fields removed.

**Overview** This dataset provides fast response wind and virtual sonic temperature data. **Data Details** Each meteorological (met) station has one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) has been verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. The sonic anemometer has been oriented to magnetic North. The serial data stream is transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The current version of the data is ".a0." level. All evidently erroneous and/or broken lines were marked as bad and/or replaced with a "baddata" place holder, the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The data have been prepared for processing with EddyPro and stored in ASCII comma delimited files formatted as follows: u,v,w,T,qc where: * "u, v, w" are the three wind components (m/s) * "T" is the sonic virtual temperature (C) * "qc" is basic quality control code: 0 - OK, 1 - sonic bad data code, 2 - broken data line, and 3 - missed line. Baddata place holder is 99.99 **NOTE**: No attempt has been made to fill gaps in the data. **Data Quality** * Includes raw data with basic quality control (QC) applied. * All housekeeping fields removed.

**Overview** This dataset provides fast response wind and virtual sonic temperature data. **Data Details** Each meteorological (met) station has one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) has been verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. The sonic anemometer has been oriented to magnetic North. The serial data stream is transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The current version of the data is ".a0." level. All evidently erroneous and/or broken lines were marked as bad and/or replaced with a "baddata" place holder, the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The data have been prepared for processing with EddyPro and stored in ASCII comma delimited files formatted as follows: u,v,w,T,qc where: * "u, v, w" are the three wind components (m/s) * "T" is the sonic virtual temperature (C) * "qc" is basic quality control code: 0 - OK, 1 - sonic bad data code, 2 - broken data line, and 3 - missed line. Baddata place holder is 99.99 **NOTE**: No attempt has been made to fill gaps in the data. **Data Quality** * Includes raw data with basic quality control (QC) applied. * All housekeeping fields removed.

**Overview** This dataset provides fast response wind and virtual sonic temperature data. **Data Details** Each meteorological (met) station has one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) has been verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. The sonic anemometer has been oriented to magnetic North. The serial data stream is transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The current version of the data is ".a0." level. All evidently erroneous and/or broken lines were marked as bad and/or replaced with a "baddata" place holder, the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The data have been prepared for processing with EddyPro and stored in ASCII comma delimited files formatted as follows: u,v,w,T,qc where: * "u, v, w" are the three wind components (m/s) * "T" is the sonic virtual temperature (C) * "qc" is basic quality control code: 0 - OK, 1 - sonic bad data code, 2 - broken data line, and 3 - missed line. Baddata place holder is 99.99 **NOTE**: No attempt has been made to fill gaps in the data. **Data Quality** * Includes raw data with basic quality control (QC) applied. * All housekeeping fields removed.

**Overview** This set provides estimation of the turbulent fluxes obtained with EddyPro v6.2.0 software (15-min averaging). **Data Details** Each meteorological station had one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) was verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. NOTE: the sonic anemometer has been oriented to the magnetic North. The serial data stream was transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The raw data were preprocessed to conform with EddyPro software. All evidently erroneous and/or broken lines were marked as bad. All erroneous or missed data were replaced with "baddata" place holder (99.99), the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The preprocessed data are available from the archive as “.a0” level data. The current dataset is the result of processing the preprocessed data (“.a0”) with EddyPro v6.2.0 for 15-minute intervals. The dataset contains results and metadata that should fully cover all software settings and options used in data processing. **Data Quality** Beyond the Quality Control (QC) procedures implemented in EddyPro, nothing additional is included.

**Overview** This set provides estimation of the turbulent fluxes obtained with EddyPro v6.2.0 software (15-min averaging). **Data Details** Each meteorological station had one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) was verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. NOTE: the sonic anemometer has been oriented to the magnetic North. The serial data stream was transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The raw data were preprocessed to conform with EddyPro software. All evidently erroneous and/or broken lines were marked as bad. All erroneous or missed data were replaced with "baddata" place holder (99.99), the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The preprocessed data are available from the archive as “.a0” level data. The current dataset is the result of processing the preprocessed data (“.a0”) with EddyPro v6.2.0 for 15-minute intervals. The dataset contains results and metadata that should fully cover all software settings and options used in data processing. **Data Quality** Beyond the Quality Control (QC) procedures implemented in EddyPro, nothing additional is included.

**Overview** This set provides estimation of the turbulent fluxes obtained with EddyPro v6.2.0 software (15-min averaging). **Data Details** Each meteorological station had one sonic anemometer (Gill R3-50, omnidirectional) mounted on top of a 10-m tower. Sensor verticality (within a degree) was verified by the analog inclinometer mounted on the base plate alongside the sonic anemometer. NOTE: the sonic anemometer has been oriented to the magnetic North. The serial data stream was transmitted via radio link (9XTend RF modem by MaxStream) to the data acquisition computer housed in a temperature-controlled enclosure at the base of the 80-m tower. The original data were stored in flat ASCII files in 30-min pieces (".00." level). The raw data were preprocessed to conform with EddyPro software. All evidently erroneous and/or broken lines were marked as bad. All erroneous or missed data were replaced with "baddata" place holder (99.99), the housekeeping data were stripped off, and the data were split into 5-min portions with no internal time stamp. The preprocessed data are available from the archive as “.a0” level data. The current dataset is the result of processing the preprocessed data (“.a0”) with EddyPro v6.2.0 for 15-minute intervals. The dataset contains results and metadata that should fully cover all software settings and options used in data processing. **Data Quality** Beyond the Quality Control (QC) procedures implemented in EddyPro, nothing additional is included.

**Overview** Measurements of surface sensible heat flux, momentum flux, wind components, and virtual temperature. **Data Details** * X (column 1) is a component of wind cm/s plus toward north. * Y (column 2) is a component of wind cm/s plus toward east. * Z (column 3) is a component of wind cm/s plus up. * T (column 4) is sonic virtual temperature in degrees C*100. * hh:mm:ss is data collection time in UTC. **Data Quality** The Argonne National Laboratory sonic anemometer measurements are visually inspected weekly for data outliers or instrument problems. The final dataset sent to the DAP will have all outliers or problematic data removed using automated and visual processes, including minimum/maximum checks, in a similar process used for Atmospheric Radiation Measurement (ARM) program eddy correlation (ECOR) data. **Uncertainty** The uncertainties of the basic sonic anemometer measurements are taken to be the accuracy of the individual measurements as specified by the instrument manufacturer. Based on historical experience with this measurement technique, flux measurement uncertainty is +/- 10 percent, although the uncertainty can be much greater during stable atmospheric conditions when turbulence intensity and atmospheric gradients are small and advection from beyond the normal fetch can occur. In particular, the Physics Site-12 tower's sonic anemometer measurements can have greater uncertainty when the wind blows through the tower structure. **Constraints** During stable atmospheric conditions, turbulence intensity and atmospheric gradients often are small, approaching or exceeding the measurement resolution of sonic anemometers. Under these conditions, advection from beyond the normal fetch also can occur, making interpretation of the fluxes difficult. Notably, the Physics Site-12 tower sonic anemometer measurements can be affected when the wind blows through the tower structure. Some unusual biases in the vertical velocities measured at the Physics Site-12 tower with west wind conditions also have not been adequately explained.

**Overview** Measurements of surface sensible heat flux, momentum flux, wind components, and virtual temperature. **Data Details** * X (column 1) is a component of wind cm/s plus toward north. * Y (column 2) is a component of wind cm/s plus toward east. * Z (column 3) is a component of wind cm/s plus up. * T (column 4) is sonic virtual temperature in degrees C*100. * hh:mm:ss is data collection time in UTC. **Data Quality** The Argonne National Laboratory sonic anemometer measurements are visually inspected weekly for data outliers or instrument problems. The final dataset sent to the DAP will have all outliers or problematic data removed using automated and visual processes, including minimum/maximum checks, in a similar process used for Atmospheric Radiation Measurement (ARM) program eddy correlation (ECOR) data. **Uncertainty** The uncertainties of the basic sonic anemometer measurements are taken to be the accuracy of the individual measurements as specified by the instrument manufacturer. Based on historical experience with this measurement technique, flux measurement uncertainty is +/- 10 percent, although the uncertainty can be much greater during stable atmospheric conditions when turbulence intensity and atmospheric gradients are small and advection from beyond the normal fetch can occur. In particular, the Physics Site-12 tower's sonic anemometer measurements can have greater uncertainty when the wind blows through the tower structure. **Constraints** During stable atmospheric conditions, turbulence intensity and atmospheric gradients often are small, approaching or exceeding the measurement resolution of sonic anemometers. Under these conditions, advection from beyond the normal fetch also can occur, making interpretation of the fluxes difficult. Notably, the Physics Site-12 tower sonic anemometer measurements can be affected when the wind blows through the tower structure. Some unusual biases in the vertical velocities measured at the Physics Site-12 tower with west wind conditions also have not been adequately explained.