Tatiana Bebchuk received her PhD in Geography from the University of Cambridge in November 2025 and is currently a postdoctoral fellow at Cornell University. During her PhD, she focused on reconstructing mid-Holocene climate variability using exceptionally well-preserved subfossil oak and yew trees from eastern England. Employing radiocarbon and dendrochronological dating, she developed tree-ring width chronologies spanning from 5200—4100 cal years BP and used a novel eco-physiological model based on tree-ring stable carbon and oxygen isotopes to develop a climate reconstruction without calibration against instrumental data.

As a result of this work, presented at the EGU, she found a shift towards unusually wet conditions in eastern England around 4,200 years ago, which coincides with an enigmatic "4.2 ka climate event". While it is traditionally associated with extreme droughts in Central Asia, the new finding suggests climate changes might have begun from a more humid North Atlantic. Testing this hypothesis is a basis of Tatiana's current postdoc at Cornell University.