In review October 20, 2025 (v1) Dataset Open 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 projecttook place in a California walnut orchard from mid-March to mid-June2007 (https://doi.org/10.26023/P4JW-9T0T-QG0S). For the 30-min dataset provided here, we extracted a subset of the full CHATS data into30-min time series with a focus on the above-canopy and below-canopysensible and latent heat flux, friction velocity, wind speed anddirection, and scalars (air temperature and humidity). These 30-minCHATS data are part of a study that evaluates the CLM-ml land-surfacemodel (Bonan et al. 2025, "Beyond surface fluxes: Observational andcomputational needs of multilayer canopy models--a walnut orchard testcase." Agricultural and Forest Meteorology, Accepted, DOI informationto be added when available)). In all, 151 variables are includedwithin the 30-min data set as described in the Additional Detailsdocument (README_CHATS_30min_data.pdf) as well as in Bonan etal. (2025).