Colette L. Heald | Lightnews

Colette Heald

@coletteheald.bsky.social

5K followers 300 following 66 posts

Canadian 🇨🇦, ETH professor🇨🇭, atmospheric chemist, researcher, educator, wanderer, and wonderer

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Colette L. Heald is a Canadian-born professor at ETH Zurich who is an expert in atmospheric chemistry.

Source: Wikipedia

Environmental science 51%

Geology 19%

Posts Replies Media Videos

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · 9d

The Feeling You Haven't Had in a Long Time
Steve Driscoll
2021

Reposted by Colette L. Heald

Rosie Fisher @rosieafisher.bsky.social · 15d

Tbf, this is probably the actual best thing in 2026 so far… youtu.be/btqHDhO4h10?...

Mark Carney's full speech at the World Economic Forum

YouTube video by National Post

youtu.be

Reposted by Colette L. Heald

Mark Carney @mark-carney.bsky.social · 16d

Heureux d’avoir rencontré le président Macron à Davos, aujourd’hui.

Le Canada et la France uniront toujours leurs voix pour défendre la souveraineté, l’intégrité territoriale et la paix.

Reposted by Valerie M. Delmotte, Colette L. Heald, Halley E. Froehlich

Eos @eos.org · 20d

Update: A bid to safeguard the National Center for Atmospheric Research failed Thursday after the Senate passed a spending package without an amendment to save the center's funding. eos.org/research-and...

Trump Administration Plans to Break Up NCAR - Eos

The Trump administration is planning to dismantle the National Center for Atmospheric Research, one of the world’s leading climate and Earth science research laboratories, according to a statement fro...

eos.org

Reposted by Colette L. Heald

Linsey Marr @linseymarr.bsky.social · 23d

Whaaat?! The EPA's cost-benefit analysis of air pollution regulations can only consider costs to businesses but not health benefits?! This is nonsense.

GIFT ARTICLE: www.nytimes.com/2026/01/12/c...

E.P.A. to Stop Considering Lives Saved When Setting Rules on Air Pollution

www.nytimes.com

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · 29d

Winter Schoolhouse
Maud Lewis
c. 1958

Reposted by Colette L. Heald, Valerie Mueller

Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · Jan 4

After reviewing nearly 200 applications from prospective grad students and postdocs over the past few months for a couple different 🧪⚒️ postings, here are some tips, at least as they apply to North American positions. I hope they help future applicants. Share with your networks. 🧵

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · Dec 25

Home for Christmas
Maud Lewis
c. 1958

Reposted by Colette L. Heald

David John Gagne II @djgagnedos.bsky.social · Dec 17

NCAR and UCAR have released a statement. NSF has not provided any guidance to UCAR or NCAR leadership about this whole situation. news.ucar.edu/133054/ucar-...

UCAR statement on reports that NSF NCAR could be dismantled | NCAR & UCAR News

news.ucar.edu

Colette Heald @coletteheald.bsky.social · Nov 30

As someone who both loves the New Yorker and is learning German this does my head in. 🚫 to diaeresis

Reposted by Colette L. Heald

David Ho @davidho.bsky.social · Nov 30

Americans don't understand the big deal about electric kettles because we're on 120 VAC. Once we see how fast water boils at 230 VAC, there's no going back.

Reposted by Carly Reddington

Colette Heald @coletteheald.bsky.social · Nov 28

My last MIT student, Joe, explored what controls the ozone formed in fire plumes. His paper is out today in ACP. Happy Thanksgiving! acp.copernicus.org/articles/25/...

Investigating fire-induced ozone production from local to global scales

Abstract. Tropospheric ozone (O3) production from wildfires is highly uncertain; previous studies have identified both production and loss of O3 in fire-influenced air masses. To capture the total ozo...

acp.copernicus.org

Reposted by Colette L. Heald

Dr. Eva Pfannerstill @evayp.bsky.social · Nov 27

PhD Opportunity on Volatiles from Plants & Climate Change 🌍🧪
Join @fz-juelich.de to explore how future climate scenarios impact plant emissions and atmospheric chemistry using mass spectrometry measurements. Learn more: www.hitec-graduate-school.de/call2025/ --> Project 4! #PhDOpportunity

HITEC | HITEC Fellows Call 2025/2026

www.hitec-graduate-school.de

Reposted by Colette L. Heald

Jesse Kroll @jessekroll.bsky.social · Nov 24

Another terrifying article about Stardust, with (what I think is) some new info:
- they claim they'll finally release info on their secret particles starting in early 2026
- they plan a first atmospheric test in 2027
- they've been funding academic research (with one PI named)

Dave Levitan @davelevitan.bsky.social · Nov 23

This is a VERY long piece about solar geoengineering that starts, scientifically speaking, badly, but gets better, but still has a few issues.

The Strange and Totally Real Plan to Blot Out the Sun and Reverse Global Warming

A 25-person startup is developing technology to block the sun and turn down the planet’s thermostat. The stakes are huge — and the company and its critics say regulations need to catch up.

www.politico.com

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · Nov 23

Haida Raven
Bill Reid ~ Haida
1972

Reposted by Joel A. Thornton, Mikael Ehn, Dylan B. Millet , and 3 more Joel A. Thornton, Mikael Ehn, Dylan B. Millet, Jesse H. Kroll, Mattias Hallquist, Vinayak Sinha

Colette Heald @coletteheald.bsky.social · Nov 19

If you work on sources and impacts of VOCs (biogenic or anthropogenic) from measurement to modeling perspectives please submit an abstract to our atmospheric organics session at #EGU26! Our invited speakers are @dbm.bsky.social and @jacquirickard.bsky.social See you in Vienna! tinyurl.com/55vda8u7

Session AS3.2

meetingorganizer.copernicus.org

Reposted by Colette L. Heald

Frank Conniff @frankconniff.bsky.social · Nov 10

Thanks to Chuck Schumer, the assembly line at the Lucy/Charlie Brown football meme factory has broken down. Folks are advised to look for other metaphors until service can be restored.

Colette Heald @coletteheald.bsky.social · Nov 8

I approve of pavement vigilantism! It’s chaos out there! www.theguardian.com/lifeandstyle...

The ‘pavement vigilante’: why Cameron Roh is naming and shaming bad walking etiquette

He films people breaking his self-created ‘laws’ of street decorum and posts the videos online – with many viewers expressing their gratitude. So watch out if you’re rushing along on your phone or whe...

www.theguardian.com

Reposted by Colette L. Heald

Aaron Wherry @aaronwherry.bsky.social · Nov 6

I imagine that Brits trying to understand a fractured party system could look at Canadian political history.

Though recent Canadian history might suggest that party consolidation (at least under FPTP) is inevitable.

www.theguardian.com/commentisfre...

Britain’s two-party politics is fragmenting: what unintended consequences await? | Andy Beckett

On one hand, no more safe seats or long careers could mean less complacency. On the other, no big parties could mean greater corporate influence, says Guardian columnist Andy Beckett

www.theguardian.com

Reposted by Katharine Hayhoe, Colette L. Heald, Sebastian Karcher , and 1 more Katharine Hayhoe, Colette L. Heald, Sebastian Karcher, Daxton R. Stewart

Sara @sportsandsuffering.bsky.social · Oct 29

I regret to inform everyone that my pedantic brain couldn’t let me live until I knew whether or not dodger blue and blue jays blue are the same blue. They are ONE PANTONE NUMBER APART.

a graphic showing the pantone numbers for the two core colors of the toronto blue jays. they are skydome blue (pantone 293) and Stieb Navy (pantone 282)

a hat and canvas tote with the pantone number for Dodger Blue (294 C)

Reposted by Colette L. Heald

David Moscrop @davidmoscrop.com · Oct 28

It’s okay, Jays. You’ll get ‘em in game four, which starts ten minutes from now.

Reposted by Colette L. Heald

David Ho @davidho.bsky.social · Oct 25

Nēnē says hello

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · Oct 20

Diindiisi - Blue Jay
Luke Swinson ~ Anishinaabe
n.d.

Reposted by Colette L. Heald, Vinayak Sinha

Virginia Tech College of Engineering @vtengineering.bsky.social · Oct 20

Could a “smoke alarm” for airborne contaminants monitor and improve the quality of the air indoors? (Where Americans spend 90 percent of their time!)

An interdisciplinary research team led by @linseymarr.bsky.social will create such a system that could cut respiratory illnesses by 25 percent. 👏

Up to $40 million in federal funding fuels research to revolutionize clean indoor air

With the contract from the Advanced Research Projects Agency for Health, an interdisciplinary research team led by Virginia Tech and Linsey Marr will create a “smoke alarm” for airborne contaminants t...

news.vt.edu

Emanuel Maiberg @emanuelmaiberg.bsky.social · Oct 17

wikipedia's data shows that AI is siphoning traffic away from the site, which is a danger to its sustainability. ironically Wikipedia is more important than ever to users who want reliable information instead of slop, and to AI companies that need it for training data www.404media.co/wikipedia-sa...

Wikipedia Says AI Is Causing a Dangerous Decline in Human Visitors

“With fewer visits to Wikipedia, fewer volunteers may grow and enrich the content, and fewer individual donors may support this work.”

www.404media.co

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · Oct 15

Autumn Trees, Mulmur Twp - Ontario
Alan C. Collier
1987

Reposted by Colette L. Heald

John Kostyack @kostyack.bsky.social · Oct 12

The petrochemical industry is expanding production of PFAS in response to the data center boom, betting that the tech industry's toxic chemical releases face no serious prospect of regulation under the Trump regime. But campaigners know that the states have a powerful role.

Advocates raise alarm over Pfas pollution from datacenters amid AI boom

Tech companies’ use of Pfas gas at facilities may mean datacenters’ climate impact is worse than previously thought

www.theguardian.com

Reposted by Colette L. Heald

Canadian Paintings @canadianpaintings.bsky.social · Oct 10

Northern Lake
Lawren Harris
1923

Reposted by Scott C. Doney, Colette L. Heald

Philip Gourevitch @pgourevitch.bsky.social · Oct 10

MIT showing the way

www.nytimes.com/2025/10/10/u...

M.I.T. Rejects a White House Offer for Special Funding Treatment

www.nytimes.com

Reposted by Colette L. Heald

Jesse Kroll @jessekroll.bsky.social · Oct 10

Happy to see that MIT just rejected Trump's “Compact for Academic Excellence in Higher Education":

orgchart.mit.edu/letters/rega...

"With respect, we cannot support the proposed approach to addressing the issues facing higher education."

Regarding the Compact | MIT Organization Chart

orgchart.mit.edu

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