David Olefeldt

@olefeldt.bsky.social

Professor in Catchment and Wetland Sciences at University of Alberta. Research on impacts of disturbances on function of northern peatlands, with focus on carbon cycling, greenhouse gas emissions, and on downstream water quality.

Ever wonder why bogs and fens are simultaneously magical, mysterious, and spooky? Bogland is my ode to these paradoxical ecosystems, and a call to action. Barnes & Noble members will receive 25% off pre-orders made by TOMORROW Jun 26 (code PREORDER25. www.barnesandnoble.com/w/bogland-me...

Bogland: The Secret World That Defies Death and Protects Life

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New study by Julia Orlova: Variability of stream DOC and its chemical composition on the Boreal Plains of western Canada have key differences when compared to other peatland-rich boreal regions - due to a combination of bedrock geology, surficial geology, and climate. doi.org/10.1002/hyp....

Climate and Landscape Controls on Dissolved Organic Matter in Wetland‐Dominated Catchments of the Boreal Plains, Canada

In the subhumid, wetland-rich, geologically heterogeneous Boreal Plains region of Canada, we found several controls on stream DOC concentration ([DOC]) and DOM composition: An increase in [DOC] and ...

doi.org

Wildfire causes accelerated permafrost thaw in northern peatlands due to summer-time processes (reduced shading and soil heating) not due to winter-time processes (snow dynamics). Patience pays off - I helped instrument the site in 2014, and now completed by Stephanie Wright! doi.org/10.1002/ppp....

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Do you love bogs and Halloween? If so, please follow and share this thread to explore the eerie, the dark and the supernatural side of bog ecosystems. BogBoo. 1/ You are terrifying and strange and beautiful, something not everyone knows how to love. -Warsan Shire

Image of a misty spooky scene with fallen log, a pond, and patches of moss and other dark green vegetation.

The term “abrupt permafrost thaw” is increasingly used in the scientific literature. The concept comes with challenges as authors look at “abrupt“ change with different perspectives on time scales, magnitudes, and impacts. Webb et al developed a new conceptual framework: doi.org/10.1007/s406...

A Review of Abrupt Permafrost Thaw: Definitions, Usage, and a Proposed Conceptual Framework - Current Climate Change Reports

Purpose of Review We review how ‘abrupt thaw’ has been used in published studies, compare these definitions to abrupt processes in other Earth science disciplines, and provide a definitive framework f...

doi.org

I spent this week collecting river samples in northwestern Canada (Dehcho, Hay, and South Slave regions), an area the size of England with ~4,000 km of driving. And so much of the landscape is burned - we drove hours and hours through charred forests. The last decade has been unprecedented.

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The bog gives and the bog takes. Liam Heffernan's PhD site, the Lutose thermokarst big - photos from 2015 and today 10 years later... Note the trees dying in the background due to permafrost thaw, and the growth of Sphagnum mosses covering our once proud boardwalk!

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I have a fully funded PhD position open for start in Jan or May 2026. Field work in peatlands of the Northwest Territories, with lab work to understand potential downstream mobilization of carbon, nutrients, mercury after thaw or wildfire. Reach out for more information, and please send on!

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I run a mid-size research group (7 graduate students / staff, 3 field assistants) which focuses on field-based research in northern Canada. Last year (2024-2025) our total expenses were ~CAD$370,000, provided in grants from federal/provincial/industry agencies, and it was spent as shown below.

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