The first pulse on 7 February was westerly and cool, producing significant snow on top of an already impressive snowpack, while the second pulse on 9 February had a more southerly orientation, was warmer with a higher snowline, and produced comparable amounts of total precipitation with more rain and less snow. The two AR pulses were quite distinct, both in terms of IVT orientation and temperature. The Oroville AR occurred between 6–11 February 2017 as two successive midlatitude cyclones in the eastern North Pacific basin moved onshore, creating multiple pulses of elevated IVT, and leading to sustained AR conditions over the Feather River Basin in Northern California for several days.
(2022) took a novel modeling approach to simulate the AR that contributed to the Oroville Dam crisis in early February 2017 (the Oroville AR) under global climate conditions representing pre-industrial, present-day, mid-, and late-21st century environments using the Model for Prediction Across Scales-Atmosphere (MPAS-A). This study supports CW3E’s 2019-2024 Strategic Plan involving Atmospheric Rivers (AR) Research and Applications by quantifying the effects of climate change on a recent impactful AR event. Martin Ralph (CW3E), recently published a paper titled “Atmospheric river precipitation enhanced by climate change: A case study of the storm that contributed to California’s Oroville Dam crisis” in Earth’s Future. Atmospheric river precipitation enhanced by climate change: A case study of the storm that contributed to California’s Oroville Dam crisisĪllison Michaelis, an Assistant Professor at Northern Illinois University, along with co-authors Sasha Gershunov (SIO/CW3E), Alexander Weyant (SIO), Meredith Fish (SIO alumna), Tamara Shulgina (CW3E), and F.
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