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- H33N-1477: Assessing Seasonal Soil Moisture–Evapotranspiration Coupling Strength and Its Drought Implications Using Triple Collocation Analysis (highlighted)
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Board 1477‚ Hall EFG (Poster Hall)NOLA CC
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Euiyoung Choi, GIST (Gwangju Institute of Science and Technology) (First Author, Presenting Author)
Subin Kim, GIST (Gwangju Institute of Science and Technology)
Yonghwan Kwon, KIAPS (Korea Insititute of Atmospheric Prediction Systems)
Hyunglok Kim, GIST (Gwangju Institute of Science and Technology)
Soil moisture and evapotranspiration are two key parts of how water and energy move between the land and the atmosphere. Their interaction, known as coupling strength, helps determine how droughts form, how long they last, and how ecosystems respond to water stress. But this relationship is not fixed. It can vary across different climates, seasons, and even depending on how we measure these variables.In this study, we use a method called Triple Collocation Analysis to better understand how the strength of this soil moisture–evapotranspiration connection changes over time and across regions. To do this, we compare three types of data: satellite observations, land surface model outputs, and measurements from ground-based flux towers. Each data source offers a unique perspective, and comparing them helps us better assess their accuracy and reliability.
Our results reveal when and where soil moisture has a stronger impact on evapotranspiration and show how this connection responds to drought. These insights can improve drought forecasting, help refine climate and weather models, and support smarter water resource management, especially in drought-prone areas like California.
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