Upcoming Talks

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If you have any speakers that would be a good fit for our speakers series, feel free to send your suggestions to stewartspeakerseries@gmail.com.

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Grace Anne Stewart Speaker Series

The Seminar

Dr. Lavanya Ashokkumar is a postdoctoral research fellow at the University of Arizona with a focus on glaciology. Dr. Ashokkumar will be presenting her talk titled "Future projections of sea-level rates from glacier models" on Thursday, December 2nd at 11 am MST.


Glaciers contribute significantly to mass loss and sea-level rates. Apart from anthropogenic causes, thermal and ocean warming are the major causes for glacier melt. Compared to glaciers worldwide, ice mass loss rates from Alaska and the Canadian Archipelago are highest and it is expected to increase through the end of the century in response to increasing temperatures. We developed a glacier model based on regional calibration from GRACE monthly observations for estimating the future evolution of mass loss from Alaska and Canadian Archipelago. The main purpose of using GRACE observations is to include the mass balance seasonality at monthly temporal intervals from all glaciers within a specific region in the model calibration. Our estimates of future sea level rates are based on the inclusion of GRACE mass balance (seasonality) for the observation period between 2002 and 2017, instead of calibrations from direct observations. The high temporal and regional spatial resolution of GRACE mass balance estimates allows us to estimate regional glacier sensitivities to atmospheric changes in temperature and precipitation, while accounting for glacier area and volume changes.

We find substantial mass loss from Alaska, Arctic Canada South, followed by Arctic Canada North. Alaska contributed -22 ± 6 mm of SLE under RCP 2.6 and -38 ± 11 under RCP 8.5, Arctic Canada North contributed -18 ± 8 mm under RCP 2.6 and -38 ± 12 under RCP 8.5, while Arctic Canada South contributed -12 ± 4 under RCP 2.6 and -21 ± 6 at RCP 8.5. The mass loss rates from our model were nearly consistent with other glacier models under the GlacierMIP2 initiative. The mass loss rates are slightly higher from CESM-LE. In case of volume loss, we find that Alaska (26% at RCP 2.6 and 46% at RCP 8.5) and Arctic Canada South (28% at RCP 2.6 and 40% at RCP 8.5) are the largest contributors to volume loss.


About GeoWomen

GeoWomen is a volunteer organization providing space for women in geoscience careers, whose level of experience varies from new graduate to retiring at the top of their careers, to meet and share experiences.

The Seminar

GeoWomen is taking a break over the holidays and will return in January 2022.

Scientific QUEERies Seminar Series

About Scientific QUEERies

Scientific QUEERies is a bi-weekly digital seminar series highlighting the research, work and experiences of LGBTQIA2S+ professionals in STEM. Started in Canada and growing with colleagues around the world. Scientific QUEERies was founded by two graduate students at the University of Alberta, Scott Cocker (PhD Student in Earth and Atmospheric Sciences) and Kyle Shanebeck (PhD Candidate in Biological Sciences) in Fall 2020 due an overall lack of initiatives promoting the LGBTQIA2S+ community in STEM, both in and out of academia. This initiative aims to increase visibility of the LGBTQIA2S+ professionals in STEM, and inspire students and early-career researchers by showing them that they do belong in all disciplines.

The Seminar

Dr. Nancy S.B. Williams is an Associate Professor at the Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges and will presenting on Tuesday, December 14th at 1pm MST. More details to follow.

You can join the Scientific QUEERies mailing list here to be updated on this and future talks.

About the Speaker Series

The Grace Anne Stewart Speaker Series is a student-led initiative which aims to connect students and faculty of the Earth and Atmospheric Sciences department to a greater diversity of geoscientists. We hope that the speaker series can introduce students and faculty to novel scientific problems, engage researchers from various sub-disciplines, and represent a diverse cross-section of the many talented researchers in the geoscience community. Our hopes are to open a dialogue about gender, sexual orientation, race, ethnicity, ability, and neurodiversity in geoscience with the intent to foster a welcoming and encouraging community. As we adapt to the 2020 pandemic, our series has moved online. Our current platform hosts speakers from outside of the UofA for monthly ~1hr online research seminars followed by open discussions about diversity and career direction.