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Indigenous communities and subsistence whale hunting
PNAS Science Sessions
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Perceiving musical boundaries
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How python hearts grow and shrink
PNAS Science Sessions
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Neighborhood travel and racial segregation
PNAS Science Sessions
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Ocean voyages and disease spread
PNAS Science Sessions
How pathogen stowaways traversed the oceans Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us. In this episode, Jamie Lloyd-Smith and Elizabeth Blackmore describe how they modeled the epidemiology of pathogens on ocean voyages. In this episode, we cover: •[00:00]...
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Why twisters target the United States
PNAS Science Sessions
Why “Tornado Alley” is unique to North America Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us. In this episode, Funing Li and Dan Chavas explain why North America produces many tornadoes each year and South America does not. In this episode, we cover:...
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Creating culturally inclusive schools
PNAS Science Sessions
Creating culturally inclusive school environments Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us. In this episode, Stephanie Fryberg, Hazel Markus, and Laura Brady explore how to create culturally inclusive environments in schools. In this episode, we cover:...
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How redlining affects biodiversity
PNAS Science Sessions
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Animal's eye view of the ocean
PNAS Science Sessions
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info_outlineWhy “Tornado Alley” is unique to North America
Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us.
In this episode, Funing Li and Dan Chavas explain why North America produces many tornadoes each year and South America does not.
In this episode, we cover:
•[00:00] Introduction
•[01:01] Weather and climate scientist Funing Li talks about the frequency of tornadoes within and outside of the United States.
•[01:25] Li explains the geography of severe thunderstorm hotspots in North and South America.
•[02:46] Weather and climate scientist Dan Chavas and Li describe how they became interested in the effect of surface geography on tornadoes.
•[05:13] Li and Chavas explain their modeling approach.
•[07:23] Li and Chavas talk about why surface roughness is important for tornado formation.
•[08:14] Chavas and Li describe the implications of the study, including effects of climate change and insights into paleoclimate.
•[09:43] Caveats and limitations of the study.
•[10:26] Conclusion.
About Our Guests:
Funing Li
Postdoctoral associate
Massachusetts Institute of Technology
Dan Chavas
Associate professor
Purdue University
View related content here: https://www.pnas.org/doi/10.1073/pnas.2315425121
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