@misc{Myers2025, type = {Master Thesis}, author = {Myers, Parker}, title = {Exploring Transboundary Water Dependencies: Identifying the Berlin-Brandenburg Precipitationshed}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:eb1-opus-10121}, school = {Hochschule f{\"u}r nachhaltige Entwicklung Eberswalde}, year = {2025}, abstract = {Developing a deeper understanding of the interconnected atmospheric systems distributing the Earth's water resources is critical for managing scarce water supplies and maintaining water security in a changing climate. This study identifies and analyzes Berlin-Brandenburg's precipitationshed, the primary evaporative moisture sources contributing to regional rainfall, using the WAM2layers moisture tracking model with ERA5 reanalysis data for the period 2000-2024. By analyzing both seasonal patterns and interannual variability, including anomalous years marked by droughts and excessive rainfall, the study explores shifts in the balance between oceanic and terrestrial sources of moisture. Findings reveal a seasonally dynamic but stable precipitationshed: the North Atlantic Ocean dominates in winter, while terrestrial contributions from Germany, France, Poland, and the United Kingdom intensify during warmer months. Hydroclimatic extremes disrupt seasonal norms by reshaping the spatial distribution and relative intensity of key moisture sources, at times amplifying marine influence or reinforcing terrestrial recycling, depending on the nature and timing of the event. This is the first study to explicitly map Berlin-Brandenburg's precipitationshed and assess the spatio-temporal consistency of its sources. The results highlight the need to embed atmospheric moisture transport considerations into transboundary water governance frameworks, recognizing that land-use decisions and ecosystem management in both local and distant source regions directly influence regional water availability. As climate variability intensifies, coordinated action across these spatially connected landscapes will be essential to safeguard long-term water security.}, language = {en} }