#yukonriver — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #yukonriver, aggregated by home.social.
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#6 - Wildlife. We didn't actually see a lot of large terrestrial animals on the trip, but we did see a female moose with two little meese, and later another young-looking moose (pictured). Also spotted a beaver, and red squirrels.
We did see some bears, but it was on the drive to our put-in, not in the wild-wild.
Lots of birds though! I counted 30 confirmed species of birds seen and heard, plus another 4 unconfirmed.
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#5 - Our guides with Sea to Sky Expeditions, Dayna and Kade.
Dayna in particular knows the ins and outs of the Yukon River very well, including many of the best places to camp.
The two of them together made an amazing meal plan that was varied, tasty, and kept us full and energized over the entire 8 day trip.
They were both very engaging, and made sure we all felt safe and had loads of fun.
Couldn't have made a trip like this without their expertise.
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#3 - The Yukon River itself. We only paddled a bit under 1/10th of its full 3200km length, but every bit of it was absolutely breathtaking.
Many tributary rivers and creeks flow into it, and it gets very wide (and silty!) as they do, and that width really messes with your perception.
But it also makes it a great river to learn how to canoe, lots of room to make mistakes and few major hazards.
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#2 - Fort Selkirk, an old trading post that is still mostly only accessible by river.
The current fort dates back to 1892, a previous one to 1852, and has been a gathering place for First Nations for over 8000 years.
The Selkirk First Nation manage the site, including the campground, and are working on preserving and restoring many of the buildings.
Visitors can explore the buildings freely, restored or not. It's amazing!
#Yukon #YukonRiver #ForkSelkirk #Selkirk #NorthernTutchone #Tutchone
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Some highlights from canoeing the Yukon River in no particular order.
#1 - Old cabins and outposts scattered everywhere, all along the river. It's hard to date them, but suspect they range from the Klondike Gold Rush (1898-1902) to claims up to the 1950s.
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Increasing areas of open water on the Yukon River near Dawson, YT and the Klondike River is mostly open, but the ice Tuesday afternoon is still holding in front of town. Last year the ice broke on April 28. Over the past 50 years the typical break-up date is May 5. #ytwx #YukonRiver #Dawson
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#Permafrost Thaw May Cause #Arctic River Erosion to Speed Up
October 09, 2024
"Permafrost, the thick layer of perennially frozen ground that covers much of the Arctic, slows down the migration of Arctic rivers, according to a new Caltech study. River migration is a common process in which a river's path meanders over time due to erosion of the riverbanks. This rerouting, which can also occur in #SuddenFloods, poses a threat for many communities that live along and depend on rivers. The findings also have implications for how the Arctic region will be impacted by a warming climate as permafrost thaws over time.
"The research was conducted in the Caltech laboratory of Michael Lamb, professor of geology, and is described in a paper appearing in the journal Nature on October 9.
"Led by graduate student Emily Geyman, the study focused on the #KoyukukRiver, a large tributary of the #YukonRiver that winds for hundreds of miles through interior Alaska. There was debate within the scientific community about whether the frozen soil along the riverbanks serves to fortify the banks against erosion or to promote it.
"'Large rivers like the Yukon or the Amazon can move tens to hundreds of feet per year,' Geyman says. "Arctic rivers in particular differ from temperate rivers because they need to thaw the material of their banks before they can pick that material up and move it.'
"Due to #ClimateChange, permafrost is slowly thawing over decades. But a river can experience drastic natural changes within a single year, with flow conditions changing from very cold and fast in early spring to warm and slow a few months later. Geyman and her collaborators leveraged these major changes that take place within a single season to gain a glimpse into how the rivers will behave in response to climate change decades or centuries into the future.
"In spring, the Koyukuk River swells in volume from snowmelt, flowing with fast, cold water. For more temperate rivers, a fast flow means more erosion. But in the Arctic, the temperature of the water matters—cold water is unable to thaw the frozen banks in order to migrate.
"In the new study, Geyman and her collaborators used satellite imagery of the Koyukuk over the past several years and developed a technique to decode high-resolution changes from the images. The team hypothesized that if permafrost was slowing the river's migration, they should only see migration later in the summer when the river water has warmed up. Their hypothesis matched with the satellite data, suggesting that permafrost does, in fact, slow down river migration.
"Next, the team compared sections of the river that flow through permafrost with those that do not. The Koyukuk is special because it traverses a patchwork of both permafrost and unfrozen ground. The team traveled to the Arctic to map the erosion on various bends of the river and found that sections without permafrost migrated twice as fast as analogous riverbends through permafrost terrain.
"The research is part of a larger effort to understand the dynamics of rivers and how they transport carbon, nutrients, and other materials trapped in the soil.
"'River migration has implications for local communities and infrastructure, and also for the Arctic environment,' Lamb says. 'About 1,500 gigatons of #carbon are stored in the frozen permafrost—about twice as much carbon as in the atmosphere, for comparison. There is also #mercury frozen in the soil that could be liberated into rivers as permafrost thaws. We are, ultimately, trying to understand what happens to these elements in the context of river erosion.'
"The work was a collaboration with local Alaska #Native communities, in particular from the town of #Huslia."
Read more:
https://www.caltech.edu/about/news/permafrost-thaw-may-cause-arctic-river-erosion-to-speed-up#GlobalWarming #PermafrostMelt #MercuryPoisoning #CarbonSinks #WaterIsLife #ClimateChange #Arctic #Alaska
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Melting Permafrost Releasing Mercury Into Alaska's Yukon River
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https://thehill.com/policy/energy-environment/4829536-climate-change-mercury-permafrost-arctic-study/ <-- shared media article
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https://doi.org/10.1088/1748-9326/ad536e <-- shared paper
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#GIS #spatial #mapping #mercury #Hg #Alaska #Yukon #YukonRiver #climatechange #waterquality #water #hydrology #BeringSea #permafrost #melting #risk #hazard #ecosystems #habitat #fisheries #metal #heavymetals #mercurybomb #pollutants #arctic #boreal #plants #vegetation #soil #geomorphology #YukonRiverBasin -
Break-up on the Yukon River at Dawson, YT occurred on on the afternoon of April 28. This was the fourth earliest break-up since 1896: only 1940, 2016 and 2019 were earlier. Typical break-up nowdays is more than a week earlier than it was in the early to mid 20th century. #ytwx #Canada #YukonRiver #hydrology #Climate @Climatologist49 @evaholland
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https://alaska-native-news.com/galena-river-energy-project-receives-9-5-million/72766/
Galena river #energy project receives $9.5M#YukonRiver village of Galena and the @UAFairbanks will investigate whether in-river turbines can provide electricity to the community.
Alaska Center for Energy and Power (X@acepuaf) and the nonprofit Sustainable Energy for Galena Alaska will explore the idea. Their project has received a $9.5 million grant from the U.S. DOE @energy.
The project will focus on #hydrokinetic tech…
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Gift link from Washington Post: A life-giving river in Alaska is running out of salmon
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ZBody found on Yukon River Thursday Presumed to be Kimberely O'Domin Missing since June 15th
[the_ad id="30587"]Kimberly O'Domin. Image-FB Profiles
Alaska State Troopers report that the body of an Alaskan Native female was discovered on the Yukon River approximately 30 miles upriver of Emmonak.
AST says the remains were turned over to the State Medical Examiner's office and has been...
https://alaska-native-news.com/68823-2/68823/
#kimberly #o'domin #marshall #yukonriver #remains -
Ice jam on the #YukonRiver has produced severe #flooding at Circle City, #Alaska. NWS preliminary estimate that this be approaching the worst on record at Circle (May 1945). Photo from Saturday evening courtesy J. Berrey. #akwx #hydrology
@Climatologist49 @CarrieNash -
NWS Fairbanks reporting major ice jam flooding in progress Saturday evening at Circle City on the #YukonRiver. #akwx #hydrology #Alaska
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Yukon River ice went out at Dawson, YT late afternoon Tuesday May 9th. This is the latest break-up since 2013. With annual break-up dates record each spring since 1896, the #YukonRiver at Dawson observations are by far the longest unbroken time series of river ice break-up dates in northwest North America. May 9th was very close to average through mid-20th century but is now about a week later than the recent average. #ytwx #Arctic #Canada #Yukon #hydrology
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3/ At the time, the #Whitehorse #Walmart wanted campers to park along the right side of the lot (when you face the store). This edge of the lot is just across the adjacent roadway from the #Yukon river.
There's a short period there in the autumn when the air is just about at freezing at sunrise -- but the #YukonRiver is still quite a bit warmer.
So I got up early the next morning, and walked across the river to the bank of the Yukon.
It was just magical. The mist was rising from the warm river, through and around the vegetation, and back-lit by the sun starting to color the eastern sky.
And I didn't have to walk more than 50 feet from the #RV door to see it.
As I said, it was the single best campsite we've had in nearly 2 decades of #RVing, and ~ 30 months on the road. And it was just a Walmart parking lot -- in exactly the right place, at exactly the right time.
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Another watercolor and conte painting, this one done at Miles Canyon on the Yukon River near Whitehorse. It is in a vertical format, not so usual for me, but I think the composition works OK.
#Watercolor #Watercolour #Conte #Summer #Landscape #MilesCanyon #YukonRiver #Whitehorse #Yukon #Painting #Art #MastoArt
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Global News BC: Grandson of race co-founder wins Iditarod sled dog race https://globalnews.ca/news/9551620/grandson-of-race-co-founder-wins-iditarod-sled-dog-race/ #globalnews #britishcolumbia #news #IditarodTrailSledDogRace #Iditarodsleddograce #iditarodwinner #iditarodrace #SledDogRace #YukonRiver #Anchorage #U.S.News #Iditarod #Alaska #Nome