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Drought Susceptibility and Response Across Different Vegetation Types in California

Presentation Date
Friday, December 16, 2022 at 2:45pm - Friday, December 16, 2022 at 6:15pm
McCormick Place - Poster Monitor 1



High temperature causes an increase in evapotranspiration, reduction of surface water and drying of soils and vegetation. The increasing temperature due to climate change can strengthen drought impacts on drought-affected regions. California has suffered from the worst drought recorded in history from 2011 to 2017, killing more than 100 million trees and impacting the state’s agricultural economy. Monitoring of evapotranspiration through the Evaporative Stress Index (ESI) and Potential Evapotranspiration (PET) from the Ecosystem Spaceborne Thermal Radiometer Experiment (ECOSTRESS) instrument provides important information about water demand and vegetation stress, which may offer early indications of drought. In order to analyze water stress on different types of vegetation and resulting climate feedback, we selected uniform regions in grasslands, shrubs, forests, and croplands across California. The presented results consist of variations of ESI and PET across different vegetation types from the year 2018 to 2022. Correlation of evapotranspiration products with temperature, humidity, and precipitation across vegetation types shows evapotranspiration change with respect to changes in meteorological conditions. Results from this study provide better understanding of drought sensitivity across major California biomes for detecting the most drought susceptible vegetation.

Funding Program Area(s)