Thirty-minute time series of observed fluxes and scalars from the Canopy Horizontal Array Turbulence Study (CHATS) field project for land surface model evaluation

The Canopy Horizontal Array Turbulence Study (CHATS) field project took place in a California walnut orchard from mid-March to mid-June 2007 (https://doi.org/10.26023/P4JW-9T0T-QG0S). For the 30-min data set provided here, we extracted a subset of the full CHATS data into 30-min time series with a focus on the above-canopy and below-canopy sensible and latent heat flux, friction velocity, wind speed and direction, and scalars (air temperature and humidity). These 30-min CHATS data are part of a study that evaluated the CLM-ml v2 land-surface model (Bonan et al. 2026, Beyond surface fluxes: Observational and computational needs of multilayer canopy models--A walnut orchard test case, Agricultural and Forest Meteorology, 378, 110960, https://doi.org/10.1016/j.agrformet.2025.110960). In all, 151 variables are included within the 30-min data set as described in the README_CHATS_30min_data.pdf document as well as in Bonan et al. (2026).