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Congrats, Dr. Amy Hudson!

1/31/2020

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UA press release about our tropical belt paper

10/16/2018

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Tracking the Movement of the Tropics 800 Years into the Past
Mari N. Jensen, UA College of Science
https://uanews.arizona.edu/story/tracking-movement-tropics-800-years-past
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Raquel's new paper in Nature Geoscience

10/16/2018

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Our group published a paper in Nature Geoscience yesterday, entitled: Climatic and volcanic forcing of tropical belt northern boundary over the past 800 years

Raquel Alfaro-Sanchez took the lead on this paper and had help from Tree-Ring Lab colleagues Stefan Klesse, Amy Hudson, Soumaya Belmecheri, Russ Monson, Henry Diaz, and Valerie, as well as Hanh Nguyen, Nesibe Kose, and Ricardo Villalba. Congrats, Raquel!

here's the link to a full-text, read-only version of the paper: https://rdcu.be/9i8t

In this paper, we used tree rings from 5 locations across the Northern Hemisphere to develop the first reconstruction of NH Hadley Circulation variability over the last 800 years. 

main findings of the paper:
(1) we find a distinct contraction of the NH tropical belt following large volcanic eruptions, which has implications for potential future solar radiation management ("artificial volcano") strategies;
(2) our reconstruction shows a 6-decade period of tropical expansion from 1568-1634, which resulted in drought conditions and contributed to co-occurring societal disruptions across the NH: Pueblo drought, Jamestown drought, Ottoman Crisis, Ming Dynasty collapse;
(3) given the projections of tropical expansion under future climate change, our results warn for potential hemispheric-scale societal impacts.

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How long does it take for today's violent wildfires to go out?

8/17/2018

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Valerie was interviewed this week about the California wildfires for a piece in Mashable.
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National Geographic interview

8/7/2018

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Valerie was interviewed by National Geographic about this summer's heatwaves and wildfires in Europe:


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Shuzo wins New Phytologist poster prize at ISS2018

8/7/2018

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Congrats to Shuzo Oita! Shuzo is a PhD student in Betsy Arnold's lab (UA Plant Sciences) who spent a few months in the Trouet Lab in 2017 to cross date tree rings in black spruce (Picea Mariana) from Quebec. He then linked his tree-ring based estimates of tree age and biomass to differing endophytic fungi communities. His poster won the coveted New Phytologist poster prize at the International Symbiosis Society (ISS) conference in Oregon. Extremely well deserved!
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AMQUA/CANQUA meeting in Ottawa

8/7/2018

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Valerie will be presenting new work in a plenary lecture at the AMQUA/CANQUA meeting in Ottawa this week: https://www.quaternary2018.com/. She will talk about our upcoming paper: "Northern Hemisphere tropical belt movements over the last 800 years". Her talk is on Thursday Aug 9 at 8.30am in room 2200 in Richcroft Hall (Carleton University)
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Valerie has been recognized as a UA Distinguished Scholar

3/29/2018

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Energy Transition Show podcast

3/21/2018

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Valerie talks about tree rings and the jet stream in the Energy Transition Show podcast.  Listen to it here: https://xenetwork.org/ets/episodes/episode-65-climate-science-part-9-jet-stream/
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Valerie is now editor for Geophysical Research Letters

3/21/2018

47 Comments

 
I primarily cover submissions about paleoclimate, climate variability, and ecosystem disturbances.  Please send your exciting new science findings to Geophysical Research Letters, I look forward to reading them!
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