We show that summertime CO2 and CH4 emissions from inland waters are an important component of lowland tundra carbon exchange with the atmosphere offsetting the terrestrial sink capacity. This is an important consideration for constraining future Arctic responses to climate warming

And that N2O inland water emissions were negligible compared to CO2 and CH4

We also found that a large flood pulse increased total landscape greenhouse gas emissions (and broke our eddy covariance tower...)

We found that inland waters (lakes, ponds and streams) offset the summer terrestrial carbon sink by about 9–13%

There's lots more we don't know, like why some #methane ebullition (bubbles) were young and some were >1,000 years old! And how long it takes for peatland drain blocking to stop the loss of old C which we know happens in other degraded peatlands

What was especially interesting, was that pools that formed as a result of #restoration efforts, particularly drain blocking, were also dominated by contemporary carbon. This means these restoration efforts were effective in keeping "old" carbon locked up in the peat

We were interested where all this #carbon was coming from, so we looked at the #isotope composition, especially #radiocarbon As you might expect, most of the carbon was quite young, sourced from the upper peat layers that the pools are generally sitting in...

Many #peatland landscapes have pools or ponds spread through them, making them dangerous places to stroll at night... But these same pools can be chock-a-block with carbon, even emitting the greenhouse gases #CO2 and #methane

Check out our new paper:
"Peatland pools are tightly coupled to the contemporary carbon cycle"

A short thread and some site photos!
doi.org/10.1111/gcb....

Must be fate! Already looking forward to exploring more of that incredible isle

The #DempsterHighway turned it on for us today… Plus we connected some awesome end-member samples!
@profbobhilton.bsky.social

With @profbobhilton.bsky.social on point

Squeezing in some Arctic river methane sampling just before the freeze up! First day in the field on this trip and made it to the Mackenzie main stem before the water level got too low and frozen

Publishing the dataset separately helped me make reproducibility and accessibility the priority. Sorry everyone for not doing this sooner! Manuscript coming soon… I hope. I’ll also publish my terrible R code in a GitHub repository. Slowly entering the modern era here!