Data and code for: Non-Conservative Xylem Water Signatures in a Tropical Rubber Plantation: Seasonal and Diurnal Isotopic Offsets

Stable water isotope data (delta-2H, delta-18O) for soil water, xylem water, and hourly xylem water from a rubber plantation (Hevea brasiliensis) and an adjacent bare-soil control site in Chiang Mai, northern Thailand. Samples were collected during two campaigns with contrasting soil moisture: post-monsoon (November 2014) and late dry season (April 2015). The dataset includes approximately 520 soil water samples, 83 xylem water samples, and 40 hourly xylem samples, along with continuous soil moisture records, on-site meteorological observations (net radiation, vapor pressure deficit), bulk density, and root distribution data. Python scripts to reproduce all figures and statistical analyses in the accompanying manuscript are included.