Kaitlin Naughten on ice-ocean interactions

Kaitlin Naughten from the University of New South Wales works on one of the most pressing issues facing modern climate science: interactions between the ocean and the vast ice shelves fringing Antarctica. Existentially, this interaction has the potential to largely determine the rate and amount of sea level rise disgorging from the continent. Will it be 20 cm by 2100? Or 15 m by 2500? The atmosphere is a key player, but ice-ocean interactions will remain critical for centuries. To get the big picture right, however, we need models that physically couple ice sheets/shelves with the ocean. This is hard, really hard, on scientific and computer engineering fronts.

Kaitlin Naughten

For her PhD, Kaitlin Beneath took the plunge into a massive — and successful — model debugging project that identified and fixed a vexing numerical instability involving sea ice production. In her postdoc, soon to start at the British Antarctic Survey, Kaitlin will be working on similarly challenging modeling, this time for the Filchner-Ronne ice shelf.

So, safe to say that Kaitlin excels at identifying and working through major scientific challenges. But she has also had to work through another challenge: a stutter. We talk about the many, and serious, challenges of having a stutter while pursuing a career in science – which inevitably involves a lot of talking. There are many facets to having, and managing a stutter: the triggers, how to give a scientific talk or conduct an interview, making career choices. Maybe the most important point for me is Kaitlin’s suggestion of how best to talk with someone with a stutter. Don’t do any of the things that might occur to you. Don’t try to finish a stutter’s sentence. Don’t fill empty space with empty talk. Wait. Just wait.

I should also say a bit about how I edited my interview with Kaitlin. I edited out umms, errs, and the like. I trimmed sections of the conversation where Kaitlin began one thread of conversation but then went a different way. This is exactly what I do for all guests. But it wasn’t clear how or if to edit Kaitlin’s stutter. If I edited out all the stutter, then it wouldn’t be Kaitlin’s voice, and we both felt this was not the way to go. We discussed other options, and decided to edit out some of the more extended blockages, but to leave others. This way, the listener will have a clear sense of what Kaitlin’s stutter is like, but the interview itself is somewhat compressed. Keep in mind that, when you meet Kaitlin in person, the stutter might be more or less than what you hear in the interview.


Climate dynamics with Libby Barnes

Libby Barnes, like essentially no one else on Forecast, wanted to be a professor from age 12. Specifically, a physics professor. And indeed, climate science almost lost Libby to neutrinos. But an instrumentation disaster, and the associated personal mayhem in the research group, made Libby realize that she was geared more for solving a great many problems, not any one particular decade-long quest. Now, Libby is exploring a dizzying array of topics in climate dynamics, and we bore down into the long-running debate on arctic impacts on the mid-latitudes and subseasonal to seasonal prediction. Along the way, Libby tells Mike about her amazingly sensible — and highly intentional — approach to academia and the tenure process.

Libby Barnes

Music: Zopje, The Township Two Step, and HUA by Brazzmatazz are licensed under a Attribution-NonCommercial-ShareAlike License, as is this episode of Forecast.

Abby Swann on plants in the climate system

Abby Swann tells Mike how plants both respond to and affect climate change. Some of this seems obvious: more CO2, more photosynthesis, bigger plants. Maybe, but there’s a lot more to it: nutrient limitations (or lack thereof!), changes in respiration, stomatal conductance downregulation, drought responses, sea ice interactions, atmospheric feedbacks, changes in land cover … the interactions are complex and numerous. With her strong background in both atmospheric sciences and land-atmosphere interactions, Abby is ideally placed to be tackling these issues, and we talk through a lot of them. Abby, like many academics, has had to grapple with discussions surrounding sexual harassment, and we round out the conversation with a hopefully helpful discussion of how to at least frame supportive discussions within a research group.

Abby Swann

11th Graduate Climate Conference

In episode 58 of Forecast, Mike talks with Henri DrakeJennifer Carman, and Molly Keogh, three of the attendees at the 11th Graduate Climate Conference. The meeting itself is a great chance for grad students working on climate change — broadly defined — to get together with their immediate peers, away from, ahem, pesky senior scientists. The interviews span physical oceanography, wetland restoration, environmental psychology, education, and behavior change. A tiny window into the inspiring work being done by the next generation of climate researchers!


Into the woods with Julia Pongratz

In episode 53 of Forecast, Mike talks with Julia Pongratz from the Max Planck Institute for Meteorology about the role of land cover and land use change in the climate system. Julia began working on the topic with an unbelievable challenge: simulating the impacts of LCLUC over the past millennium. Now her interests encompass geoengineering, climate mitigation and model intercomparisons, with a focus on understanding the ever-complex interactions among biophysical and biogeochemical feedbacks. Also, Julia assures Mike that, unlike in Maine, the ticks aren’t too horrendous in Germany. Probably. At least in the big cities.


Antarctic sea ice with Marilyn Raphael

In episode 52 of Forecast, Mike and Marilyn Raphael from the University of California at Los Angeles talk about Antarctic sea ice. Arctic sea ice is, on a relative scale, well understood: observations and models show a massive decline. Antarctic sea ice is weirder. Overall, the extent of Antarctic sea ice is increasing, slightly. But this masks nearby areas with both large increases and decreases. Mike and Marilyn discuss the many mechanisms that might be underlying the interesting and somewhat bedeviling trends, as well as the multitude of ways in which Antarctic sea ice interacts with the broader climate system. We wrap up with a personal discussion of what it’s like being an introvert in science, and some ways to navigate the often-draining interpersonal demands.

Marilyn Raphael

Trace metals and thrash metal with Kaustubh Thirumalai

People find science for all kinds of reasons. Some are born to it, but usually not. Most people find science by bumping into it at a bar, getting help from it while fixing a flat tire, seeing it alight on a leaf, iridescent, or watching it pass by on a subway car going the other way.

Kau aboard the JOIDES Resolution as part of Expedition 353, sailing in the Bay of Bengal in 2015. Photo by Sungham Kim from the Korea Polar research Institute.

For Kaustubh Thirumalai (Kau), the stage was set with burnout on chemical engineering in India coupled with a side job reviewing comics and black metal for a friend’s website. Then, almost randomly searching for an interesting internship, he hooked up with Prosenjit Ghosh, for whom he worked as a local fixer, helping to procure parts for the construction of a mass spec. After that, it was geosciences, full-on: a move to the US, interests in the techniques and concepts of paleoclimate, and an ever-expanding network of collaborators. But still comics and metal! Just now with a splash of trace metals — little bundles of strontium and company, waiting to be discovered.


Intro music is from the album Terminal Redux by Vektor, ranked by Kau as the #1 metal album of 2016. Extro music is Quartz, by Kau himself. All music used by permission — thanks Dave and Kau! Photos are by Kau, used by permission.

The Atlantic’s Rob Meyer on climate journalism

Sometimes papers in Nature are incomprehensible to anyone other than a hard-core specialist. Yes, we use press releases, News & Views, and other reporting to make the leap to our broader readership. But for bringing science to the general public, no amount of Carl Sagans, Neil deGrasse Tysons, or Bill Nyes is going to get the job done. You need journalists. Journalists like Rob Meyer from The Atlantic, who are producing an astonishing amount of great content on topics like the Paris Agreement, fracking regulations, and Antarctica. Rob talks me through his path from music major to twitter procrastinator to Atlantic writer. I flip the usual Nature-related questions around to Rob: how do you select stories, frame them for your audience, and discuss the policy implication? And what is the rationale for the New York Times hiring Bret Stephens? Definitely a story there.

Rob Meyer from The Atlantic

Music: Clips for the intro and extro are the songs 1969 and One Ticket Two Bills by Ending Satellites CC BY-NC-SA 3.0.

Climate economics with Sol Hsiang

The field of environmental economics in general — and climate economics in particular — is exploding. And my guest on episode 44 of Forecast, Solomon Hsiang from UC Berkeley, is helping to crack open some of the recalcitrant oyster shells of the field. How does climate influence conflict, migration and economic productivity? We talk through some of the big challenges in addressing these topics: the frequent impossibility of running experiments and the accompanying use of quasi-experiments; the growing use of — at last! — data; how incredibly hard it is to disentangle the influence of single factors — like climate — in a complicated human system. In many ways economics is decades behind physical sciences. As Sol explains, we’ve now for the most part forgotten about the initial debates regarding fluid dynamics, but economics is still very much at the phase of figuring out elementary processes. Sometimes this means that the major findings reside in statistical approaches, without clear mechanistic understanding. But Sol and his colleagues are working towards linking microscale human decisions to aggregate societal processes, and it is this sort of understanding that will, and indeed already is, proving important in a policy context.

Credit: Brittany Murphy

Music:  Le train pour Paspébiac, Quand la bière est tirée and Matelot by QuimorucruCC BY-NC-ND 4.0.

Jennifer MacKinnon and the swirly things

Most of the big stuff in Earth system science arises from the small stuff. The Keeling curve is the balance between an unknowably large number of microorganisms and the cellular fixation of carbon. Clouds, covering more than half of the planet at any one time, are created at the sub-cm scale. And, increasingly, we are realizing that ocean circulation — once conceived as a sort of monstrous conveyor belt — is instead a motley crew of what Jennifer MacKinnon from the Scripps Institution calls “the swirly things”. Eddies, turbulent billows … “there’s just a ton of animals in the zoo”. Jen talks Mike through the close linkage between observations and theory: it’s hard to conceive of an Antarctic Circumpolar Current composed of a horde of eddies if you can only look over the side of one ship at a time. And the more we observe the ocean, the more interesting it becomes. It now looks, for example, that there may be super-weird interactions between internal waves and mesoscale eddies. More is coming, too, probably from Deep Argo. Yet beyond observations and theory — and as we also heard from Bill Boos — Jen’s kind of science can play a key role in advancing societally-relevant prediction systems. Plus, sabbatical in Palau*, wrestling, and Walter Munk is turning 100 — the party is on!

Music: Springish, All Eventualities and The Everlasting Itch For Things Remote by Gillicuddy. CC BY-NC 3.0.

*In the interview I said that Palau is in the Eastern Pacific. It is, of course, in the Western Pacific.