Natalya and I caught up when she came to visit Dartmouth for an Earth Science colloquium.

Liz and I caught up when she came up to Dartmouth to give an ice+climate seminar in winter 2024.

We talk about snow and climate change in the Northeast. We talk about Liz's recent work on ice climbing as an indicator of warming winters [https://doi.org/10.3389/fhumd.2023.1097414].

We reference the "snow cliff" as described by Gottlieb and Mankin (2024) [https://doi.org/10.1038/s41586-023-06794-y] which had recent been published.

Liz and I talk about the great work that Mardi Fuller is doing here in New Hampshire. In particular, Liz recommends the film Mardi and the Whites [https://www.paulachampagne.com/mardiandthewhites]

We also touch on Liz's work with Protect Our Winters [https://protectourwinters.org/] and Community Snow Observations [https://communitysnowobs.org/].

I caught up with Professor Dan Goldberg when he was on sabbatical here at Dartmouth in 2023.

We talk about the Geophysical Fluid Dynamics program (https://gfd.whoi.edu/) and grounding lines (the location where ice sheets begin to float on the ocean as an ice shelf; Schoof, 2007 and Goldberg et al., 2009).

In our discussions about inversions, I mention the work by Bueler and Brown (2009).

Gwenn Flowers visited Dartmouth College in Winter 2023 as part of the Society of Fellows invited speaker series.

We talk about the International Glaciological Society (IGS) where Gwenn is the current president. She dicusses recent IGS efforts on Diversity, Equity, and Inclusion (DEI) as well as the IGS global seminar that Tavi Murray started in the beginning of the pandemic. This has been an excellent resource for learning about work in the community in a virtual format. Gwenn offers advice about protecting time, teaching strategies, and taking baby steps.

We talk a lot about Gwenn's experience as a student and her thesis advisor Garry Clark. Gwenn's brings excellent insights on mentoring and the kind of mentoring she received from Garry, Helgi Björnsson, and Carl Wieman.

We discuss the current place of fieldwork in glaciology: the attraction for students, the future of remote sensing, and training tool. We also tie fieldwork into our earlier discussion of DEI (e.g., Karplus et al., 2022) and we talk about the privelege of field work (e.g., the 40 years of no progress on diversity paper authored by Bernard and Cooperdock, 2018)

Lauren Andrews and I caught up in January 2024 when she visited Dartmouth to give an ice+climate seminar as well as work on an ICESat-2 collaborative project.

Much of conversation focused around subglacial hydrology, the flow of water under glaciers and ice sheets. In particular, we discuss the field campaign that she worked on as a graduate student. The result of this fieldwork was published in her 2014 Nature paper.

A few names of folks that appear numerous times throughout the show are

• Bob Hawley, Dartmouth College
• Martin (Tinu) Lüthi, University of Zurich
• Matt Hoffman, Los Alamos National Laboratory

I also mention the borehole catalog that I am compiling. In this project, I am collecting borehole observations of subglacial effective pressure (the difference between ice overburden and water pressure). The goal is to understand the distribution of effective pressure below glaciers (figures 1 and 2) and to constrain subglacial hydrology models. The data catalog is stored as a google sheet: please be in touch if you have data to add to the catalog!

Figure 1: borehole observations of subglacial effective pressure from around the world.

Figure 2: map showing the locations where boreholes have been drilled and instrumented to determine the subglacial effective pressure.