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Matthew Morriss

@rockiceandsnow.bsky.social

Geomorphologist and outdoor enthusiast. Passionate educator and curious soul. Mapping Geologist @ UGS. Posts = my own. his/him pronouns. Author of: Cave records reveal recent origin of North America’s deepest canyon (PNAS)πŸ³οΈβ€πŸŒˆπŸ₯ΎπŸ§—‍♂️

802 Followers  |  416 Following  |  186 Posts  |  Joined: 13.08.2023
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Posts by Matthew Morriss (@rockiceandsnow.bsky.social)

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I've updated my RiverREM GUI to now work successfully with a custom centerline shapefile. You can find V1.0.1 on github at the link below (for windows only right now)
github.com/morrismc/REM...
@dpmanchee.bsky.social

17.02.2026 21:48 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

A few issues have been raised with the REM code I shared a few days ago. I'll try to fix those early next week when I'm back in the office!

14.02.2026 16:09 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

thanks for the issue! I'll try to update next week after the holiday here in the US!

14.02.2026 16:08 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Let's hope so!

14.02.2026 16:08 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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If you want to try my tool, which currently is only working on windows, please take a look at my latest v1.0.0 release: github.com/morrismc/REM...

everything should be projected in UTM!
if you have any issues, please log them on GH!
#ClaudeCode
@opentopography.org

09.02.2026 20:37 β€” πŸ‘ 11    πŸ” 2    πŸ’¬ 2    πŸ“Œ 1
New package automates river relative elevation model (REM) generation | OpenTopography

opentopography.org/blog/new-pac...

the open topography tool requires a bit more python know how and I've been using it for years. But with some new coding tools out there now, I wanted to put together a GUI interface for making REMs, linked in next post

09.02.2026 20:37 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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Relative elevation models are both compelling visualizations of fluvial systems but also frankly useful for geologic mapping of terraces or quantifying zones of potential flood inundation. Several years ago Open Topography coded up an method for using python to make REMs (see below) 🧡

09.02.2026 20:37 β€” πŸ‘ 38    πŸ” 9    πŸ’¬ 2    πŸ“Œ 0
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If you're not watching the Olympics, you should be! A quick dashboard made with #Claude for the Women's 3000 m speed skate. Highlighting the time per lap of each of the top four contenders. Gold Medal winner Lollobrigida is in a league of her own! #Olympics

09.02.2026 12:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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SLC is ideal for outdoor dining. Why are we stuck inside? [ANALYSIS] - Building Salt Lake I was recently in Durham, North Carolina. Along with my family, we ate outside three times – without trying. We simply walked to a restaurant and asked to sit outside. By contrast, when we got home to...

SLC is ideal for outdoor dining. Why are we stuck inside? [ANALYSIS] buildingsaltlake.com/slc-is-ideal... via @buildingsaltlake.bsky.social and @rockiceandsnow.bsky.social

03.02.2026 22:01 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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SLC is ideal for outdoor dining. Why are we stuck inside? [ANALYSIS] - Building Salt Lake I was recently in Durham, North Carolina. Along with my family, we ate outside three times – without trying. We simply walked to a restaurant and asked to sit outside. By contrast, when we got home to...

Wrote an OP-Ed about the lack of outdoor dining in SLC. I was able to quantify that SLC has a great number of days throughout the year when eating outdoors would be ideal - why doesn't our built environment reflect that? (written on personal time) buildingsaltlake.com/slc-is-ideal...

08.02.2026 13:52 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Turns out there have been other years with bad dry spells but we've been riding out a pretty bad one!

28.01.2026 23:47 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Much has been made of our dry winter thus far in the Northern Wasatch. Here's some fun SWE curves from two #SNOTEL sites. Not the worst year YET but not looking good....

28.01.2026 23:47 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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distracting myself from the trying moments by vibe coding fun plots

25.01.2026 15:22 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
This line graph illustrates the percentage change in agency staff levels from the previous year for nine major U.S. federal scientific and health organizations between the fiscal years 2016 and 2025. The agencies tracked include the CDC, Department of Energy, EPA, FDA, NASA, NIH, NIST, NOAA, and NSF. For the majority of the timeline between 2016 and 2023, the agencies show relatively stable fluctuations, generally staying within a range of +5% to -5% change per year. However, there is a dramatic and uniform plummet starting in the 2024–25 period. Every agency depicted shows a sharp downward trajectory, with staffing losses ranging from approximately -15% to over -25%. The Environmental Protection Agency (EPA) shows the most significant decline, dropping to roughly -26%, while the National Institute of Standards and Technology (NIST) shows the least severe but still substantial drop at approximately -15%.

This line graph illustrates the percentage change in agency staff levels from the previous year for nine major U.S. federal scientific and health organizations between the fiscal years 2016 and 2025. The agencies tracked include the CDC, Department of Energy, EPA, FDA, NASA, NIH, NIST, NOAA, and NSF. For the majority of the timeline between 2016 and 2023, the agencies show relatively stable fluctuations, generally staying within a range of +5% to -5% change per year. However, there is a dramatic and uniform plummet starting in the 2024–25 period. Every agency depicted shows a sharp downward trajectory, with staffing losses ranging from approximately -15% to over -25%. The Environmental Protection Agency (EPA) shows the most significant decline, dropping to roughly -26%, while the National Institute of Standards and Technology (NIST) shows the least severe but still substantial drop at approximately -15%.

This is the most astonishing graph of what the Trump regime has done to US science. They have destroyed the federal science workforce across the board. The negative impacts on Americans will be felt for generations, and the US might never be the same again.

www.nature.com/immersive/d4...

20.01.2026 22:53 β€” πŸ‘ 14450    πŸ” 8318    πŸ’¬ 90    πŸ“Œ 765
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Been a WARM winter in SLC, no appreciable snow at the airport thus far.... thankfully getting some in the mtns.

10.01.2026 02:54 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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gonna leave this one here.

07.01.2026 17:51 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

made in concert with Gemini

07.01.2026 17:42 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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My brother sent me this

28.08.2025 19:38 β€” πŸ‘ 2119    πŸ” 354    πŸ’¬ 13    πŸ“Œ 17
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New seafloor mapping offshore Kodiak Island, Alaska, reveals extensive submarine landslides In summer 2025, a research team led by the USGS worked with the NOAA ship Rainier to map a large swath of seafloor offshore of Kodiak Island, Alaska, along the Alaska-Aleutian Trench.

New seafloor mapping offshore Alaska in the Alaska-Aleutian subduction zone! #USGS #NOAA #MarineGeohazards πŸ§ͺβš’οΈπŸŒŠ

29.08.2025 01:17 β€” πŸ‘ 80    πŸ” 22    πŸ’¬ 0    πŸ“Œ 2

Its a map that put together a lot of existing 500k maps. not yet a seamless national product...

29.08.2025 11:46 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Yes, yes I do want to see this new geologic map!

28.08.2025 20:20 β€” πŸ‘ 18    πŸ” 3    πŸ’¬ 2    πŸ“Œ 0

just had a friend who was there recently! yikes!

21.08.2025 14:12 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Will Struble Tectonic Geomorphology and Surface Processes at the University of Houston

Can forests damp earthquake waves and thus limit co-seismic landslides? What does this mean for Critical Zone development? Postdoctoral position with Will Struble and a multi-disciplinary team (including me🌲🌲🌊🌳πŸͺΎ). Position is open until filled.

willstruble.com
#CZScience #Postdoc

20.08.2025 23:23 β€” πŸ‘ 10    πŸ” 6    πŸ’¬ 1    πŸ“Œ 0

Does anyone know a way to project terrace location and elevations onto a river long profile, both of which were done without using Matlab/Python/R? Basically a GIS based framework?

20.08.2025 22:59 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

congratulations!

20.08.2025 21:45 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
The barrier lake of the 21 July 2025 landslide in the Matia'an valley in Taiwan. Image by etaiwan.news.

The barrier lake of the 21 July 2025 landslide in the Matia'an valley in Taiwan. Image by etaiwan.news.

The 21 July 2025 rock avalanche in the Matia'an valley in Wanrong, east Taiwan is generating a lake that could have a volume of 86 million cubic metres at the point of overtopping. This poses a threat to at least seven downstream communities.
eos.org/thelandslide...

08.08.2025 06:33 β€” πŸ‘ 27    πŸ” 14    πŸ’¬ 0    πŸ“Œ 1
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The influence of wildfire on debris flows in a landscape of persistent disequilibrium: Columbia River Gorge, OR, USA Debris flow erosion in rocky catchments of northern Oregon (USA) is found to be relatively insensitive to fire conditions.

shamelessly made a bluesky account so I could plug my first first-author paper (!) on postfire erosion in steep rocky catchments -- go check her out!

www.science.org/doi/10.1126/...

11.08.2025 01:15 β€” πŸ‘ 45    πŸ” 16    πŸ’¬ 6    πŸ“Œ 1

NISAR has lifted off! And been successfully placed in its orbit! Good job, ISRO! Woohoo!

30.07.2025 12:31 β€” πŸ‘ 27    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0

Although large earthquakes generates strong shaking over a wide area, this is somewhat mitigated by the rupture being offshore. But if the rupture breaks the ocean floor, it generates destructive a tsunami that can spread across the ocean basin in the hours that follow.

30.07.2025 11:15 β€” πŸ‘ 6    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0

NISAR LAUNCHED!!! congrats to all those involved!

30.07.2025 12:36 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0