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#McGillUniversity

0 posts0 participants0 posts today

Thanks to Jackie Goordial #UGuelph for a great guest lecture in our Astrobiology class: on using the McMurdo Dry Valleys as Mars analogs. University Valley has been below freezing for at least the last 150,000 years; extremely dry, and 0.01% organic material. Yet there are cells that remain viable, and that metabolize and reproduce when conditions fluctuate into the slightly more hospitable -perhaps like the Mars subsurface.

An amazing image shown to us in a talk by Elliott Skierszkan of #CarletonUniversity . He is exploring the mobilization of metals into water from thawing permafrost. The XRF image shows uranium (pink, top right image) concentrated along the wall of a plant stem, found in a fresh core of permafrost mud. This uranium (sourced from bedrock) is then soluble in the pore water when the permafrost melts.

Early career presenters at AGU Wednesday:

William Fajzel
Constraining the role of human economic activity across the Great Acceleration
(Eric Galbraith's group)
Wednesday morning posters, GC31W-0138

Robert Bogue
Ground Truthing a Novel Remote Sensing Method for Satellite Detection of Volcanic CO2 Emissions Using Tree Ring Isotopic Data
(John Stix and Peter Douglas' groups)
Wednesday afternoon posters, V33B-3099

Any eye-opening talk today by Dr. Peter DeCarlo, Johns Hopkins University. His group is measuring organic air pollutants in residential areas near industry.

Context for the map below: 11 parts per trillion is the EPA level for a 1:10,000 cancer risk from long-term exposure.

From:
Robinson et al. (2024) Environmental Science & Technology 2024 58 (25), 11084-11095. DOI: 10.1021/acs.est.3c10579

Continued thread

The photo posted with the CBC News story is of the 2017 McGill Vertebrate Palaeontology Field Course crew removing overburden along the erosional edge of Quarry C (photograph courtesy of K. Dumas)

Graduate and undergraduate students who participated in the 2012, 2013, 2014, 2015, 2017, and 2018 editions of the Field Course (run by Dr. Hans Larsson) are acknowledged in the published paper.