Author(s): Jardine K; Gimenez B
Site ID: BR-Ma2
Site Name: Manaus - ZF2 K34
Variables: Sapflow
Date Range: Feb. 15, 2015 - March 16, 2017
Description: This data package contains raw sapflow data from the NGEE Tropics K34 tower site on a plateau near Manaus, Brazil. These are mostly raw data from the data loggers, except in the case of the ICT sensors, where the datalogger output was translated using ICT software. One heat ratio sap flow sensor (SFM1, ICT international) was installed per tree. Tree biophysical characteristics for each tree were used with Sap Flow Tool version 1.4.1 (ICT International/Phyto-IT) to calculate sap velocities from raw data downloaded from the SFM1 sap flow sensors in the field. The attached zip file contains six folders: three for data, one for sensor manuals and data collection protocols in PDF format, one for logger configuration programs, and a final folder for metadata files in Excel format. Related metadata is contained in the referenced dataset. This dataset replaces the sapflow data of two retired packages, http://dx.doi.org/10.15486/ngt/1507764 and http://dx.doi.org/10.15486/ngt/1507767.
QA/QC: None
Methods Description: One heat ratio sap flow sensor (SFM1, ICT international) was installed per tree near the DBH height (1.30 m). The SFM1 sap flow sensor has three needles inserted parallel to the stem. The needle positioned in the middle is the “heater” and was configured to emit 20 Joules of thermal energy every fifteen minutes. The other two needles, one installed above and another below the heater needle, determine sap velocity (cm/h) at 0.75 cm depth into the xylem using the heat ratio method (Green et al., 2003) and is based on temperature data collected at 3 Hz following the heat pulse (5 min 32 s measurement cycle). Tree biophysical characteristics for each tree were used with Sap Flow Tool version 1.4.1 (ICT International/Phyto-IT) to calculate sap velocities from raw data downloaded from the SFM1 sap flow sensors in the field.
Access Level: Public
Originating Institution(s): Lawrence Berkeley National Laboratory
Sponsor Organization(s): U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research; Lawrence Berkeley National Lab
Contact: Jardine, Kolby - Lawrence Berkeley National Laboratory (kjjardine@lbl.gov)
Version: 1.0
Dataset Citation: Jardine K; Gimenez B (2021): Sapflow raw and translated data, 2015 - 2017, BR-Ma2: Manaus. 1.0. NGEE Tropics Data Collection. (dataset). http://dx.doi.org/10.15486/ngt/1561986
Acknowledgement: This material is based upon work supported as part of the Next Generation Ecosystem Experiments-Tropics (NGEE-Tropics) funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research through contract No. DE-AC02-05CH11231 to LBNL, as part of DOE's Terrestrial Ecosystem Science Program. Additional funding for this research was provided by the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). Logistical and scientific support is acknowledged by the Forest Management (MF), Climate and Environment (CLIAMB), and Large Scale Biosphere-Atmosphere (LBA) programs at the National Institute for Amazon Research (INPA).
Data Link: Download Dataset
http://dx.doi.org/10.15486/ngt/1556938
