iiinova — where your digital self keeps evolving

Reposted by Jon Wang (he/him)

Steve Crawford @astrocrawford.bsky.social · 13/12/2024

NASA has recently released updated websites for data! Check out the new Science, Earth, and Planetary data sites! #OpenScience #NASA #AGU24 science.data.nasa.gov earthdata.nasa.gov planetary.data.nasa.gov

science.data.nasa.gov

Science Data Portal

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Reposted by Jon Wang (he/him)

Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Hello! I'm proud to share a new wildfire paper in Environmental Research Letters - California had recent huge fires but tree loss rose much faster, relatively, than burned area. How much is the per-burned-area impact on tree cover losses rising, and why? Paper: doi.org/10.1088/1748-9326/ad86cf 1/7

doi.org

Rising forest exposure and fire severity from climate warming amplify tree cover losses from wildfire in California - IOPscienceSearch

Rising forest exposure and fire severity from climate warming amplify tree cover losses from wildfire in California, Jonathan A Wang, Michael L Goulden, Carl A Norlen, Ved Bhoot, Shane Coffield, James...

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Many thanks to collaborators at University of California, Irvine's Dept of Earth System Science who helped guide this study and the University of Utah School of Biological Sciences for the support! Not sure who is on the bsky yet. 7/7

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Categories of fire severity (high vs low) are hard to interpret, and might miss climate trends. Remote sensing advances are revealing nuance across ecoregions (big expansion of fire in dense northern forests!). Hope this can improve wildfires observation, forest management, and ecosystem models! 6/7

Two maps of California, with varying shades of green indicating the amount of tree cover in each area. Burned areas indicated in orange for the first decade, 1986-1996, on the left and the last decade, 2011-2021, on the right. Fires are present, but modest in area, on the left. Fires are much larger in extent on the right, particularly in the northern forests.

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Using a simple model of regional tree loss using burned area, fire severity, and forest exposure, we show that 47% (nearly half!) of observed tree losses can be attributed to increasing trends in fire severity and forest exposure. Climate warming will exacerbate this. 5/7

Line graph showing time on the x axis: year, 1985-2021 and cumulative tree loss in fire on the y axis. Lines and show the cumulative tree loss in modeling scenarios from 1985-2021 based on several scenarios. Black lines show the observed losses, reaching about 13,000 kilometers squared. The purple line represents a model scenario where fire severity is held constant, and it reaches about 10,000 kilometers squared. The red line shows the scenario where forest exposure is held constant, reaching about 8500 kilometers squared. The blue line shows the scenario where fire severity and forest exposure are held constant, and only burned area increases. It ends around 7500 kilometers squared.

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Increased forest exposure suggests more dense forests are vulnerable to severe wildfire. In the last decade, wildfire moved in climate space, impacting forests adapted to moister, cooler environments that might have resisted disturbance. 4/7

Graph showing summer temperature on the x-axis and precipitation on the y-axis. Each climate bin is colored with the average tree cover (grey to green, 0 to 80%) occupying that part of climate space in California. Black points indicate the location in climate space of fires in the first decade. Blue indicates the same for the middle decade, and red for the last. Large points show the decadal average. The large blue and black points in are clustered around 20 degrees C and 750 mm precipitation. The large red point (last decade) is located at about 18 degrees C and 850 mm precipitation.

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

Average fire severity and forest exposure rose by 30% and 41%, respectively, from 1985-2021. The average tree cover loss per burned area used to be 20%, but recently it has been 34%, on average (+70%!). Increased burned area drives most tree loss, but is not the sole factor! 3/7

Four panels. First panel: line graph with red line showing increasing burned area, black line showing increasing tree cover loss from 1985-2021. Second panel: Average forest exposure (as points) and standard deviation (as lines) increasing steadily from 1985-2021. Third Panel: Average fire severity and standard deviation (again, points and lines) increasing steadily over 1985-2021. Fourth panel: the average and standard deviation of the combined effect of forest exposure and fire severity (tree cover loss), again as points and lines, showing steady increases from 1985-2021.

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

We used remotely sensed fractional veg cover and disturbance data to quantify forest exposure (how densely treed were burned areas) and fire severity (relative tree loss) in the average wildfire. Disturbance data: doi.org/10.7910/DVN/CVTNLY Veg data: doi.org/10.7910/DVN/KMBYYM 2/7

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Jon Wang (he/him) @jonwang.bsky.social · 17/11/2024

doi.org

Rising forest exposure and fire severity from climate warming amplify tree cover losses from wildfire in California - IOPscienceSearch

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Jon Wang (he/him) @jonwang.bsky.social · 16/11/2024

My first field work experience was in a bog! We ate wild huckleberries the whole time.

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Reposted by Jon Wang (he/him)

Brian J. Enquist @bjenquist.bsky.social · 09/11/2024

Here is a starter pack for scientists and others interested in Macroecology - go.bsky.app/GBn9pNZ 🌎🧪🦋🌾

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Jon Wang (he/him) @jonwang.bsky.social · 09/11/2024

Neat!! Thanks for putting this together.

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Reposted by Jon Wang (he/him)

John Paul Helveston @jhelvy.bsky.social · 09/11/2024

Man it's so nice to just read interesting stuff and not be bombarded with obnoxious ads

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Jon Wang (he/him) @jonwang.bsky.social · 17/01/2024

Any ecophysiology people looking to do a postdoc with an awesome new lab in beautiful Salt Lake City? Deserts, plants, field work - all awesome stuff! Apply here: utah.peopleadmin.com/postings/157726

utah.peopleadmin.com

University of Utah Employment Site

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Jon Wang (he/him) @jonwang.bsky.social · 11/10/2023

We are seeking graduate students at the Dynamic Carbon and Ecosystems (DYCE) lab at the University of Utah for Fall 2024! We use remote sensing to study wildfire, vegetation, and carbon in terrestrial ecosystems. Learn more: www.dycelab.net

dycelab.net

Dynamic Carbon and Ecosystems Lab

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Jon Wang (he/him) @jonwang.bsky.social · 30/06/2023

Hi science friends. I finally made a website for my new lab at the University of Utah. Still a work in progress but some things are there. Check it out! www.dycelab.net

dycelab.net

Dynamic Carbon and Ecosystems Lab

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Jon Wang (he/him) @jonwang.bsky.social · 11/12/2022

Still recruiting for this post-doc position! utah.peopleadmin.com/postings/139679 If you're interested in studying land and carbon dynamics in Arctic-boreal North America, please apply! If you're at #AGU22, send me a note and we can make a time to meet in person to chat...

utah.peopleadmin.com

University of Utah Employment Site

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Jon Wang (he/him) @jonwang.bsky.social · 22/09/2022

We are recruiting a post-doc to join us at @UofUBiology to work on a NASA Terrestrial Ecology project. Looking for those interested in land cover, biomass, remote sensing, Arctic-boreal ecosystems! DM me with questions, please share widely! utah.peopleadmin.com/postings/139679

utah.peopleadmin.com

University of Utah Employment Site

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

By the way, the vegetation and disturbance datasets are publicly available. Fractional vegetation cover (tree shrub herb bare), 1985-2021, at 30 m resolution: doi.org/10.7910/DVN/KMBYYM. Disturbance type, also 1985-2021 and 30 m resolution: doi.org/10.7910/DVN/CVTNLY...

doi.org

Error: DOI Not Found

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

This work is a part of the @CA_CECS and we hope it improves land management and global ecology. Made possible by public data from @USGSLandsat! Many thanks to @uciess @ESPM_Berkeley and co-authors @randersonjt @ClarkeAKnight and not-on-Twitter Mike Goulden and John Battles! 5/n

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

Tree losses were concentrated in the hottest parts of the state. As summer temperatures continue to climb, even more of California's forests will be threatened by wildfire and climate stress. 4/n

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

Tree cover dynamics (dark green line, top panel) varied widely geographically. Northern forests were impacted by harvest and recent fires, but recovered when it rained in the 90s. Rapidly warming southern forests might be losing their ability to recover from disturbance. 3/n

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

Forests are key in natural climate solutions but are threatened by disturbances like fire, making their viability uncertain. Since 1985, forest growth in CA can't keep up with recent extreme wildfire seasons, resulting in a net loss of tree cover by 6.7%. 2/n

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Jon Wang (he/him) @jonwang.bsky.social · 06/07/2022

Check out our new paper in @AguAdvances! We used satellite data and machine learning to map annual disturbances and vegetation in California from 1985-2021 to see how fires are reshaping forests. Available now for the low low price of $0 open access:...

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Jon Wang (he/him) @jonwang.bsky.social · 02/05/2022

I have been shy to share this because there's a lot of imposter syndrome to manage. But I also can't wait to start! I would love tips on surviving and thriving in this role! Okay, I think that's enough exclamation points for one day.

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Jon Wang (he/him) @jonwang.bsky.social · 02/05/2022

I'll soon be looking for a postdoc and/or student interested in using data science and remote sensing to study global change impacts on Arctic-boreal, urban, and fire-prone ecosystems. Reach out or watch this space to learn more!

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Jon Wang (he/him) @jonwang.bsky.social · 02/05/2022

Hi friends. I am overjoyed to share I will soon move to SLC/@UUtah to join @UofUBiology as an assistant professor in January 2023!! I still can't believe how fortunate I am. Much love and gratitude to mentors, friends, and colleagues over the last decade+!

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Jon Wang (he/him) @jonwang.bsky.social · 01/03/2022

[ imposter syndrome intensifies ]

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Jon Wang (he/him) @jonwang.bsky.social · 20/01/2022

Help, I need your well-wishes! It is interview time. Gah!

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Jon Wang (he/him) @jonwang.bsky.social · 15/10/2021

Whew...job applications are really hard!

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Jon Wang (he/him) @jonwang.bsky.social · 02/08/2021

Almost time to submit an abstract to @theAGU fall meeting! If you study land disturbances and biogeochemical cycles, please consider submitting to session B080, Understanding Natural and Anthropogenic Disturbances in Biogeochemistry and Carbon-water Coupling! #AGU2021 @YueLi_LA

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Jon Wang (he/him) @jonwang.bsky.social · 10/05/2021

Bonus - I took the photo they are using for the feature! Taken by drone in the Northwest Territory in 2017 while I was sinking into muddy peatlands.

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Jon Wang (he/him) @jonwang.bsky.social · 10/05/2021

friends for help with the study!

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Jon Wang (he/him) @jonwang.bsky.social · 10/05/2021

This is mortifying to share because I hate hearing my own voice, but I'm thrilled to cross "interview on public radio" off my bucket list: www.sciencefriday.com/segments/arct… Thanks to @AlexaLim22 and @iraflatow for interview, and @randersonjt and Twitterless...

sciencefriday.com

Arctic Wildfires Are Burning An Important Carbon Sink

Fires in the far north may impact forests’ ability to sto...

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

In 2017, I visited the Northwest Territory and was shocked by how these truly huge forests are changing, how extensive the fire scars were. They'll require effort to protect and I'm honored to contribute my own carbon monitoring efforts to their conservation! Thanks everyone! 8/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

Finally, we compared our results to predictions from CMIP6 Earth system models, overestimated AGB growth by a factor of 3 due to the poor representation of fires. The models with red outlines represent fire processes, and the black ones lack fire processes. 7/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

We calibrated a regrowth model using chronosequence-derived average rates of AGB gain and loss due to fires and estimated the changing influence of fires on the AGB dynamics over longer timescales. These factors are far more important than variability in climate and CO2 6/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

Overall what we see is a modest net increase in AGB across the ABoVE domain. The dynamics of AGB growth, however, are heavily dominated by disturbances, and the net growth is cut by a third or so due to fires and harvest. 5/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

The long time series allowed us to track the dynamics of disturbance-driven losses and post-disturbance recovery on annual and decadal timescales. For example, here is a heavily harvested area in British Columbia. Apologies that the color scale changes! 4/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

The spatial detail allowed us to map the highly spatially heterogeneous distribution of boreal forest biomass across the 2.8 million km2 study domain. Shown are some examples of a fire-prone area (top row) and a heavily harvest area (bottom row) 3/8

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Jon Wang (he/him) @jonwang.bsky.social · 29/04/2021

By combining @usgslandsat time series with spaceborne lidar from ICESat, we mapped stocks and changes in aboveground biomass to better understand how disturbances impact carbon budgets. We want to understand what "greening" means in the far north. 2/8

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