Tapajos K67 tropical forest seasonal flux tower data

Seasonal (16-day) eddy covariance measurements that include water, carbon, and energy flux, radiation, canopy temperature, humidity, and ancillary calculations such as evaporation, transpiration, and leaf area index.  Data was collected at the Tapajós National Forest, Santarem K67 (BR-Sa1), a tropical primary forest (2.857°S, 54.959°W).  Measurements correspond to the periods: April 2001 - January 2006, July 2008 - July 2012, and January 2015 - July 2020.  The 16-day fluxes and meteorological data were obtained from an average daily cycle based on hourly observations. As a result, we refrain from assigning greater significance to specific hours when the fluxes tend to be complete, and vice versa (for instance, in cases of missing flux values due to afternoon rainfall events). Daytime values were selected as above a 5 W m-2 top of the atmosphere radiation (TOA; W m-2) and labeled as LEdaytime in the case of latent heat flux (LE), Hdaytime for sensible heat flux (H), and so on.

Methods
Eddy covariance (EC) instrumentation was installed on a 64 m tall tower in 2000. Since then, water and energy fluxes have been measured using the closed-path method. Hourly turbulent fluxes were subject to quality control, by removing rainy periods, outliers due to instrument malfunction (e.g. pump failure) or when the calibration system failed (e.g. N2 gas run-out). See Restrepo-Coupe, et al. (2013). What drives the seasonality of photosynthesis across the Amazon basin? A cross-site analysis of eddy flux tower measurements from the Brasil flux network. Agricultural and Forest Meteorology, 182–183, 128–144