This diurnalSIF_readme.txt file was generated on 2021-08-24 by Christine Y. Chang


GENERAL INFORMATION

1. Title of Dataset: Data from: Unpacking the drivers of diurnal dynamics of sun-induced chlorophyll fluorescence (SIF): Canopy structure, plant physiology, instrument configuration and retrieval methods

2. Author Information
	A. Principal Investigator Contact Information
		Name: Ying Sun
		Institution: Cornell University
		Address: 306 Tower Road, 1023 Bradfield Hall, Ithaca NY 14053
		Email: ys776@cornell.edu
		ORCID: https://orcid.org/0000-0002-9819-1241

	B. Co-investigator Contact Information
		Name: Christine Y. Chang
		Institution: USDA-ARS
		Address: 10300 Baltimore Ave., Bldg 001 Room 323, Beltsville MD 20705
		Email: christine.chang@usda.gov
		ORCID: https://orcid.org/0000-0001-6609-3527

3. Date of data collection: 2018-07-06 to 2019-08-14

4. Geographic location of data collection <latitude, longiute, or city/region, State, Country, as appropriate>: 42.714413, -76.653248

5. Information about funding sources that supported the collection of the data: 
USDA-NIFA Postdoctoral Fellowship to CYC, Grant #: 2018-67012-27985
USDA-NIFA Hatch Award to YS, Grant #: 1014740
This research is also supported by the US Department of Energy (DOE), Office of Science, Biological and Environmental Research Program. ORNL is managed by UT-Battelle, LLC, for DOE under contract DE-AC05-00OR22725.

SHARING/ACCESS INFORMATION

1. Licenses/restrictions placed on the data: CC-BY

2. Links to publications that cite or use the data: 
Chang, C. Y., Wen, J., Han, J., Kira, O., LeVonne, J., Melkonian, J., Riha, S. J., Skovira, J., Ng, S., Gu, L., Wood, J. D., Näthe, P., & Sun, Y. (2021). Unpacking the drivers of diurnal dynamics of sun-induced chlorophyll fluorescence (SIF): Canopy structure, plant physiology, instrument configuration and retrieval methods. Remote Sensing of Environment, 265, 112672. https://doi.org/10.1016/j.rse.2021.112672

3. Links to other publicly accessible locations of the data: 

4. Links/relationships to ancillary data sets: 
Naethe, Paul, & Rascher, Uwe. (2021). Selected clear-sky FloX hyperspectral data (V.0.1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.5286019
Relationship : Two additional sites used in the associated manuscript (GROS, JULI), but not included in this package

5. Was data derived from another source? No

6. Recommended citation for this dataset: 
   Chang et al. (2022). Data from: Unpacking the drivers of diurnal dynamics of sun-induced chlorophyll fluorescence (SIF): Canopy structure, plant physiology, instrument configuration and retrieval methods [Dataset]. Cornell University Library eCommons Repository. https://doi.org/10.7298/mqfk-hs97


DATA & FILE OVERVIEW

1. File List: 
CMRF1819_SIF.csv - Peak growing season, clear sky SIF measurements obtained during 2018-2019 from Cornell Musgrave Research Farm field site in Aurora, NY
CMRF1819_APAR.csv - Peak growing season, clear sky APAR measurements obtained during 2018-2019 from Cornell Musgrave Research Farm field site in Aurora, NY
MOFLUX17_SIF.csv - Peak growing season, clear sky SIF measurements obtained during 2017 from Missouri Ozark Ameriflux field site
MOFLUX18_APAR.csv - Peak growing season, clear sky APAR measurements obtained during 2018 from Missouri Ozark Ameriflux field site

2. Relationship between files, if important: 
CMRF1819_SIF and CMRF1819_APAR were measured at the same tower but at different temporal frequencies.
MOFLUX17_SIF and MOFLUX18_APAR were measured at the same site location on different years.

3. Additional related data collected that was not included in the current data package:    
Two additional sites used in the associated manuscript (GROS, JULI) are not included in this package and are posted at:
Naethe, Paul, & Rascher, Uwe. (2021). Selected clear-sky FloX hyperspectral data (V.0.1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.5286019
 
4. Are there multiple versions of the dataset? No


METHODOLOGICAL INFORMATION

1. Description of methods used for collection/generation of data: 

See associated manuscript Methods section 2.1.2 for CMRF SIF and 2.1.3 for MOFLUX SIF, and 2.4.1 for APAR. 
Chang C.Y., Wen J., Han J., Kira O., LeVonne J., Melkonian J., Riha S. J., Skovira J., Ng S., Gu L., Wood J. D., Naethe P., Sun Y. (2021) Unpacking the drivers of diurnal dynamics of sun-induced chlorophyll fluorescence (SIF): Canopy structure, plant physiology, instrument configuration and retrieval methods. Remote Sensing of Environment 265: 112672.

2. Methods for processing the data: 
SIF data are presented as instantaneous measurements. Retrievals were performed using the methods provided in the associated manuscript.

3. Instrument- or software-specific information needed to interpret the data: 
n/a

4. Standards and calibration information, if appropriate: 
See associated manuscript section 2.1.2 for CMRF and 2.1.3 for MOFLUX

5. Environmental/experimental conditions: 
See associated manuscript section 2.1.2 for CMRF and 2.1.3 for MOFLUX, and section 2.2.1.

6. Describe any quality-assurance procedures performed on the data: 
See associated manuscript section 2.2.3.

7. People involved with sample collection, processing, analysis and/or submission: 
Chang, Christine Y. (CMRF)
Sun, Ying (CMRF)
Gu, Lianhong (MOFLUX)
Wood, Jeffrey D. (MOFLUX)

DATA-SPECIFIC INFORMATION FOR: CMRF1819_SIF.csv

1. Number of variables: 5

2. Number of cases/rows: 8137

3. Variable List: 
Year     : year 
DOY      : fractional Julian day of year
Time_h   : time in hours
SFM_wide : SIF retrieved using spectral fitting method at O2A band using 759-767.76 nm fitting window (units mW m-2 nm-1 sr-1)
SFM_narrow : SIF retrieved using spectral fitting method at O2A band using 759.5-761.5 nm fitting window (units mW m-2 nm-1 sr-1)

4. Missing data codes: 
NaN : missing value

5. Specialized formats or other abbreviations used: n/a


DATA-SPECIFIC INFORMATION FOR: CMRF1819_APAR.csv

1. Number of variables: 5

2. Number of cases/rows: 2356

3. Variable List: 
Year     : year 
DOY      : fractional Julian day of year
Time_h   : time in hours
APAR     : Absorbed photosynthetically active radiation (units umol quanta m-2 s-1)
fAPAR    : fraction of absorbed photosynthetically active radiation (arbitrary units) 

4. Missing data codes: 
NaN : missing value

5. Specialized formats or other abbreviations used: n/a


DATA-SPECIFIC INFORMATION FOR: MOFLUX17_SIF.csv

1. Number of variables: 4

2. Number of cases/rows: 14377

3. Variable List: 
DOY      : fractional Julian day of year
Time_h   : time in hours
SFM_wide : SIF retrieved using spectral fitting method at O2A band using 759-767.76 nm fitting window
SFM_narrow : SIF retrieved using spectral fitting method at O2A band using 759.5-761.5 nm fitting window

4. Missing data codes: 
NaN : missing value

5. Specialized formats or other abbreviations used: n/a


DATA-SPECIFIC INFORMATION FOR: MOFLUX18_APAR.csv

1. Number of variables: 4

2. Number of cases/rows: 284

3. Variable List: 
DOY      : fractional Julian day of year
Time_h   : time in hours
APAR     : Absorbed photosynthetically active radiation (units umol quanta m-2 s-1)
fAPAR    : fraction of absorbed photosynthetically active radiation (arbitrary units) 

4. Missing data codes: 
NaN : missing value

5. Specialized formats or other abbreviations used: n/a