Articles | Volume 26, issue 10
https://doi.org/10.5194/nhess-26-4723-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-4723-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Oct 2026
Research article |
| 02 Oct 2026
| 02 Oct 2026
Seasonal influence on post-fire debris flow likelihood after the 2020 Lake Fire
University of New Mexico, Albuquerque, 87107, USA
California State University Northridge, Northridge, 91330, USA
now at: GEOMAR Helmholtz Center for Ocean Research Kiel, 24148, Germany
Adit Ghosh
University of Southern California, Los Angeles, 90089, USA
California State University Northridge, Northridge, 91330, USA
Brandon T. Page
Dudek, 225 S Lake Ave, Suite 225, Pasadena, CA 91101, USA
California State University Northridge, Northridge, 91330, USA
Greg Jesmok
California State University Northridge, Northridge, 91330, USA
Denise V. Berg
California State University Northridge, Northridge, 91330, USA
Marlene Lopez
California State University Northridge, Northridge, 91330, USA
Deepshikha Upadhyay
University of California, Los Angeles, Los Angeles, 90095, USA
David J. Stone
California State University Northridge, Northridge, 91330, USA
Environmental Resources Management Inc., 1050 SW 6th Ave Suite 1650, Portland, OR 97204, USA
Scott C. Hauswirth
California State University Northridge, Northridge, 91330, USA
Eric O. Lindsey
University of New Mexico, Albuquerque, 87107, USA
Louis A. Scuderi
University of New Mexico, Albuquerque, 87107, USA
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Sameera Musa, Deepshikha Upadhyay, Alexandrea Arnold, Jamie Lucarelli, Bastien Linol, Daniel Gebregiorgis, Asfawossen Asrat, and Aradhna Tripati
EGUsphere, https://doi.org/10.5194/egusphere-2026-2583, https://doi.org/10.5194/egusphere-2026-2583, 2026
This preprint is open for discussion and under review for Climate of the Past (CP).
Short summary
Short summary
We investigate different fossil sample types in the Kalahari region in southern Africa by using multiple techniques. The primary aim was to identify a reliable archive that can be used to reconstruct the climate. We found that fossil gastropods are best suited, with initial temperatures of ~15oC at ~33000 years ago interpreted from these fossils. This data are critical as it is the first for the region and is important for global climate models, as these lack data from the southern hemisphere.
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Short summary
Post-fire debris flows or mudflows, can occur during intense rainfall following wildfires. Yet, it remains unclear how seasonal variation affects debris-flow initiation years after the fire. Using simulations of the 2020 Lake Fire in California, we show that debris-flow likelihood varies drastically between drier and wetter months, even four years after the fire. This study highlights the need to consider climatic and seasonal patterns in post-fire debris-flow assessment.
Post-fire debris flows or mudflows, can occur during intense rainfall following wildfires. Yet,...
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