Travis Longcore
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travislongcore.bsky.social
Travis Longcore
@travislongcore.bsky.social

Cities & nature, light pollution, species & landscape conservation, maps & spatial analysis 🌎 Adj. Prof. UCLA Inst. of the Environment and Sustainability

Environmental science 63%
Geography 16%

Reposted by Travis Longcore

My projects have always done all-sky measurements under all conditions because I'm concerned with the effects on wildlife, as well as interested in seeing the stars. For example, this paper --> iopscience.iop.org/article/10.1... where we show the influence of the % clouds on illuminance.
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Reposted by Travis Longcore

In 2010-2013, conservation teams on #Chichijima - 1 of the main islands in the #Ogasawara chain - captured & removed 131 feral cats. The goal was to reduce predation pressure on an endangered pigeon. The results were immediate: adult pigeon numbers rose from 111 to 966 www.nature.com/articles/s42...
A look at the devastating power loss across Jamaica following the historic crossing of Hurricane Melissa, captured by NOAA-21.
TIL the National Environmental Policy Act is the only thing preventing Donald Trump from dropping nuclear weapons all over the American West.
Good news everyone.

We have the EIS process to come to the rescue here, since I'm not joking, nuclear testing in the 70s and on was required to proceed an Environmental Impact Statement...

www.nrc.gov/docs/ML0331/...

The global biomass of mammals since 1850. On the bright side, a few more whales since the 1980s. www.nature.com/articles/s41...

Healthy forests have native pollinators.
Allowing domestic bees in a national park is akin to letting cattle graze in it. If beekeepers wanted healthy forests they would not introduce a competitor to wild pollinators.

Reposted by Travis Longcore

Allowing domestic bees in a national park is akin to letting cattle graze in it. If beekeepers wanted healthy forests they would not introduce a competitor to wild pollinators.

Big thanks to @uclasustainablela.bsky.social at for funding the Heat Resilient LA project and @countyofla.bsky.social for their collaboration. end/

Put these papers together and when it comes to _outdoor_ exposure to extreme heat, you need to bring shade to the people where they are -- bus stops, parking lots, dropoff/pickup locations -- and similarly provide cooling locations close to where they are (minimize walking to get there). 7/

And: Space-time dynamics in hazard exposure analysis: smartphone locations show pedestrian routes are inflexible to extreme heat events. www.nature.com/articles/s44... 6/
Space-time dynamics in hazard exposure analysis: smartphone locations show pedestrian routes are inflexible to extreme heat events - npj Natural Hazards
npj Natural Hazards - Space-time dynamics in hazard exposure analysis: smartphone locations show pedestrian routes are inflexible to extreme heat events
www.nature.com

This is part of our series of papers using 📱 smartphone data to understand extreme heat impacts in Los Angeles. See: Smartphone locations reveal patterns of cooling center use as a heat mitigation strategy 🧊 www.sciencedirect.com/science/arti... 5/
Smartphone locations reveal patterns of cooling center use as a heat mitigation strategy
The increasing frequency and duration of extreme heat events prompts questions regarding mitigation proposals and evaluation of current strategies suc…
www.sciencedirect.com

Planners should focus shade for cooling in areas of greater convenience (i.e. along daily routes) during extreme heat. Invest in cooling centers, streetscapes, workplaces, and residential comfort. 🌳🌳🌳🌳🌳🌳🌳 4/

People from socially vulnerable areas are more likely to visit parks in less vulnerable areas than vice versa. The higher quality parks in more wealthy areas are visited by people curating their environments through mobility. 🚋 🚗🚲 4/

Time of day and day of week are more important to park use than weather. But people do stay later in the evening at parks when it is super hot. 3/

Parks are used slightly less during extreme heat days than paired control days. Parks are good to reduce temperatures, but to alleviate heat in events but are used less when it is hot. Except the beach. People go to the beach in LA when it is very hot. 🏖️☀️🏄‍♀️ 2/

Reposted by Mark Lubell

🔥 New Paper Alert 🔥 -- from the incomparable @ioes.ucla.edu Senior Practicum in Environmental Science with the paper led by new alums Sammy Fruman and Bethany Woo --> anonymized smartphone data show park use in extreme heat 1/ #heat #hazards #mobility #cities www.sciencedirect.com/science/arti...
Smartphone location data show park use patterns in extreme heat (Los Angeles, California, USA)
Climate change, combined with the Urban Heat Island effect, will generate more frequent, intense extreme heat events. These events can induce heat str…
www.sciencedirect.com

Remembering a #lightpollution researcher gone too soon.
Four years ago today since Douglas died. We miss him every moment of every day. Loved so much by his family and many friends; a respected scientist and moth-er; a wearer of great shirts; and a Bellowhead superfan.

Reposted by Travis Longcore

Four years ago today since Douglas died. We miss him every moment of every day. Loved so much by his family and many friends; a respected scientist and moth-er; a wearer of great shirts; and a Bellowhead superfan.
Justice Sotomayor, not mincing words, also says that today's decision will lead to the "creation of [] a second-class citizenship status" for Latinos, who now will have the burden to "carry enough documentation to prove that they deserve to walk freely."

Reposted by Travis Longcore

Have a look at what Marko and his team are putting together, taking submissions on: - Biological Effects of Light Pollution - Impacts on Human Health - Urbanization and Light Pollution - Effects on Astronomy and Night Sky Obs - Dark Sky Protection and Policy - Methods for Measuring and Monitoring
I would like to invite you to attend the international ENLIGHT Conference, Novi Sad, Serbia, November 28-30, 2025.
The conference is dedicated to the different aspects of #lightpollution and #alan.
All details are available on the website:
👉 www.enlightproject.rs/enlight-conf...
ENLIGHT - ENLIGHT Conference
Welcome to the ENLIGHT Conference!
www.enlightproject.rs

So much interesting new ecological #lightpollution research being published, and I have to highlight this new paper in particular. Shielded lights and lower CCT (warmer colors) reduce flight call disruption of migratory birds in a pretty massive study in NM www.sciencedirect.com/science/arti...

Reposted by Travis Longcore

I would like to invite you to attend the international ENLIGHT Conference, Novi Sad, Serbia, November 28-30, 2025.
The conference is dedicated to the different aspects of #lightpollution and #alan.
All details are available on the website:
👉 www.enlightproject.rs/enlight-conf...
ENLIGHT - ENLIGHT Conference
Welcome to the ENLIGHT Conference!
www.enlightproject.rs

Reposted by Travis Longcore

News: Trump’s FCC wants to widen the (already huge) loophole that companies like SpaceX use when they want to launch tens of thousands of satellites while dodging environmental review studies. I’m busy with book revisions, but would happily chat with interested journalist friends. Thoughts below.

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Reminder that fascinating studies about moonlight influences on species behavior are also de facto studies about #lightpollution and especially #skyglow See photos at esajournals.onlinelibrary.wiley.com/doi/full/10.... an article in Ecology at doi.org/10.1002/ecy....
NEW: Extraordinary footage has emerged of the huge tsunami that hit Russia’s remote Kamchatka peninsula after the 8.8 magnitude earthquake on July 30th.

(🎥 Doni Nikz)