A wee history lesson on wetlands as wastelands. This philosophy dominated colonialism in the 🇺🇸 as wetlands were seen as a barrier to “building the country”. Early settlers lacked resources to drain wetlands, but this changed w/ the Swamp Land Act passed by Congress in 1849. 1/
States gained the right to sell wetlands, w/ profit intended to fund “dehydration” of the land. This Act decimated wetlands throughout #Louisiana & #Florida but also #Minnesota & #Oregon. It also set the stage for toll-use of canals, privatizing travel in the U.S. 2/
The govt used wetland drainage to attract settlers to push through the “last frontier.” Cultivating drained wetlands was seen as the best option to curb overcrowding in cities and to reduce land disputes. Because of the scale & what was at stake, the US military got involved. 3/
Soon after, regions w/ drained wetland such as Florida experienced massive floods, fires, soil infertility, & salinization. This initiated a flurry of scientific research to combat these issues. Science used as a colonial patch-job rather than addressing the real problem. 4/
The Swamp Land Act led to destruction of coastal & inland wetlands, triggering loss of biodiversity, harm to water flow/quality. But this also was a climate disaster. Now we know that drainage of peat soils is a major source of GHG emissions to the atmosphere. #ClimateAction 5/5
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Have a job offer? Need to negotiate but not sure how? Negotiating wisely has long-term $ impacts, yet often is considered a taboo topic. No more! Here I'll share some advice as someone who has sat on both sides. Please share to help out early career colleagues in any field! 1/
Why is negotiating a taboo subject? Many orgs (including universities) have convinced us that we should feel honored & lucky to receive a job offer. I call bullshit. We all worked too hard for that. Rule 1: the minute you have a job offer, you are in the driver's seat. 2/
Also why negotiating is taboo - good negotiators are often described as cunning & shrewd, not "becoming" for women. I call bullshit for the second time. Rule 2: Negotiating is about communication, relationship building, & strategic thinking. These are areas where women excel. 3/
Permafrost thaw is about WAY more than carbon and climate. From impacting caribou to mobilizing mercury and legacy arsenic from gold mining, many thaw impacts are not conceptualized yet let alone understood. Below shows how pockmarks of thaw can consume entire forests. 1/
How can permafrost thaw consume whole forests or trigger landslides? The answer is simple yet so complex. Ground ice. Thaw of ice-rich permafrost causes drama. Peek inside permafrost to view gorgeous ice wedges in Alaska's #permafrosttunnel. Stunning. 2/
Ground ice content in the permafrost drives what happens after thaw. Check out this awesome visualization. On the left is what happens when ice-rich permafrost warms up. The literal backbone of the Arctic disappears. 3/
In case you thought Sphagnum was only found in boreal peatlands. This is one of my most favorite discoveries, carved into a Sphagnum hill on Basse-Terre, Guadeloupe. I've imagined all sorts of stories....someone loves this place.
My 5 favorite Sphagnum facts: 1) Sphagnum is a genus with >350 species thriving all over the world. 2) Sphagnum is THE most important genus for carbon in the biosphere. Its biomass stores more carbon (once in the atmosphere) than any other genus of life. 2/
Vascular plants have roots to acquire water & nutrients, how can Sphagnum compete? They are master manipulators! Fact 3: As they mature, Sphagnum cells release protons, which lowers adjacent pH & benefits the Sphagnum. Sneaky acid ninjas. 3/
Pimples or pingos? Thoughts on thawing permafrost and explosive craters in Siberia, starting with this nice @BBC_Future article. 1/ bbc.com/future/article…
Pingo means small hill in Inuvialuit (Yakut: bulgunnyakh). For years, permafrost scientists wondered if these explosive craters were the remnants of pingos collapsing (sometimes called ognips). Check out my entire list of favorite permafrost terms. 2/
We often find craters or other forms of collapse from thawing permafrost. @forestecogrp and I flew over this one in NW 🇨🇦. However, what we've seen in Alaska and 🇨🇦 are forms of subsidence/slumping, whereas the craters in Siberia are explosive. 3/
With a lot of debate this week on how models simulate permafrost thaw & climate impacts, I want to explain how we actually MEASURE permafrost change. Follow this thread for the pretty scenes or the weird science. Here is me caught in a surprise ❄️ squall w/ permafrost gear. 1/
The traditional method of monitoring permafrost change is through the trusty frost probe. In this quick video I explain our work on 🔥-permafrost interactions while taking a frost probe measurement. 2/
Below check out a time lapse video of frost probing along one of our transects in the Northwest Territories 🇨🇦. I share these field sites with an array of incredible students & the fabulous @forestecogrp. 3/
@ClimateOfGavin@mammuthus@theresphysics Buckle up for a permafrost ride! This paper is a thought experiment that relies on my empirical & modeling work on permafrost C release. First, I ♥️ using models for thought experiments so that is a positive here. Below is what permafrost THAW looks like - it's complicated! 1/
@ClimateOfGavin@mammuthus@theresphysics Permafrost is represented very crudely in most models to date. We know these frozen soils store a lot of C, but we know that only a fraction of that C is vulnerable to decomposition post-THAW. As temp constraints are released, there are other mechanisms that protect that C. 2/
@ClimateOfGavin@mammuthus@theresphysics Only a fraction of permafrost C is vulnerable to release upon THAW, & of that most will be released as CO2. I study methane & yes it's important & likely to be more so in the future. The authors' thought experiment regarding fraction of methane release in this paper is silly. 3/