Jeremy Wentzell

This is a really sad to hear. A big thank you to Jim. He’s been very kind to me over the years and a wonderful mentor and collaborator.

I dislike this greatly.

Wow, that’s fantastic! Congrats!

I don’t even know what to say… Just devastating.

Exciting news!

I’m really sorry to hear this Steve. This is just awful.

At least it didn’t half-ass its death.

Re-upping our paper on carbon deposition in the Alberta oil sands.

You’d have to look at the kinetics but I wouldn’t be surprised if the answer was yes.

If it makes O2- it’s definitely making ozone and God only knows what else. In terms of chemically ionizing things, O2- is a hammer. I would suspect the kinetics of those reactions are faster than the particle removal.

Im guessing you’ll find other reduced nitrogen goodies (e.g. HNCO) from those urea catalysts as well.

Feasibility test of per-flight contrail avoidance in commercial aviation - Communications Engineering Vapour trails (contrails) from aircraft make a substantial contribution to aviation’s climate impact. Here we execute a per-flight contrail avoidance feasibility test through altitude adjustments base...

Super study. N is small, but looks really promising. Cirrus formation is thought to be more than 50% of the climate forcing from commercial aviation. www.nature.com/articles/s44...

Three must read papers for PhD students. #scisky #PhD #science #research #academicsky

1. The importance of stupidity in scientific research

Open Access
journals.biologists.com/jcs/article/...

Iodine Activation from Iodate Reduction in Aqueous Films via Photocatalyzed and Dark Reactions Iodine in the atmosphere destroys ozone and can nucleate particles by formation of iodic acid, HIO3. Recent field observations suggest iodate recycles from particles sustaining significant gas-phase IO radical concentrations (0.06 pptv) in aged stratospheric air, and in elevated dust plumes. However, laboratory evidence for iodine activation from aerosols is currently missing. Here, a series of coated-wall flow tube (CWFT) experiments test for iodine release from thin aqueous films containing iodate. Photocatalyzed reactions were studied using iron(III) citrate (Fe–Cit), Arizona Test Dust (ATD), and Fe2O3, along with the dark reaction of iodate with H2O2 at 90% RH and 293 K. Fresh films were separately irradiated with visible and UV-A light, and the efficient release of molecular iodine, I2, was observed from all irradiated films containing photocatalysts. For films with Fe–Cit, visible light reduced larger amounts of iodate than UV-A light, activating ∼40% of iodate as I2. The formation of oxygenated volatile organic compounds (OVOC) and iodinated OVOC was also observed. Dark exposure of films to H2O2 led to I2 release in smaller amounts than suggested by Bray–Liebhafsky kinetics, consistent with H2O2 salting-out in the films, or possibly other reasons. Photochemical activation is enhanced by dust proxies in the film, and by aging the film with H2O2 in the dark prior to irradiation. These findings help explain recent field observations of elevated IO radical concentrations in lofted dust layers, and warrant the inclusion of photocatalyzed iodate reduction in atmospheric models.

New publication out: doi.org/10.1021/acse.... Iodate Recycling. Great job, Mago and Lucia! Great collaboration with UC Boulder (Rainer Volkamer 's group)

Let’s go with that. 🤣🤣🤣

This took several tries to get the measurements sorted out but I’m thrilled it’s finally published. Thanks so much to @svocora.bsky.social for taking the lead on this!

I’m still sad we didn’t end up getting to take part in AEROMMA. Some much important science was done with this aircraft.

Image of John Seinfeld and information about this call for papers (promotional image)

ACS ES&T Air is accepting submissions for a special issue dedicated to the work of John H. Seinfeld, featuring contributions from many fields including air quality, aerosol microphysics and climate, and organic aerosol formation and dynamics. Closing date is 3/3/25. Please repost!! go.acs.org/bC7