Kaighin McColl
kaighin.bsky.social
Kaighin McColl
@kaighin.bsky.social
Associate Professor, Harvard
Department of Earth and Planetary Sciences and School of Engineering and Applied Sciences.
Land-atmosphere interactions, hydroclimate, land climate. Australian.
https://www.kaighin.org/
Reposted by Kaighin McColl
Harvard Forest is looking to hire a senior ecologist to take over its long-running eddy covariance towers. Application review will begin November 1; the position will remain open until it is filled.

careers.harvard.edu/job/senior-s...
Senior Scientist
careers.harvard.edu
October 16, 2025 at 2:03 PM
Harvard Forest is looking to hire a senior ecologist to take over its long-running eddy covariance towers. Application review will begin November 1; the position will remain open until it is filled.

careers.harvard.edu/job/senior-s...
Senior Scientist
careers.harvard.edu
October 16, 2025 at 2:03 PM
Reposted by Kaighin McColl
Maybe understanding soil moisture isn’t as complicated as we thought. New #AGUPubs research by Tara Gallagher & @kaighin.bsky.social

eos.org/research-spo...
May 23, 2025 at 12:10 PM
New paper: a radically simple theory for soil moisture, that explains much of the large-scale spatial and temporal variability relevant to climate. Surprisingly, VPD and plant physiology are not very important for understanding changes with warming.
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
April 21, 2025 at 6:29 PM
Reposted by Kaighin McColl
Come work at SU EES! There is a growing community of postdocs here
April 7, 2025 at 3:20 PM
Reposted by Kaighin McColl
Hidden among the Trump administration's first week assault on the American people is withdrawing the long-awaited EPA proposal on PFAS (forever chemicals) effluent limits in drinking #water.

www.ewg.org/news-insight...
www.ewg.org
January 26, 2025 at 12:56 AM
Reposted by Kaighin McColl
Our preprint (Brad Marston and me) with some perspectives on CDR and albedo is out: arxiv.org/abs/2501.01885
Removing Atmospheric Carbon Dioxide Using Large Land Or Ocean Areas Will Change Earth Albedo And Force Climate
When large surface areas of the Earth are altered, radiative forcing due to changes in surface reflectance can drive climate change. Yet to achieve the necessary scale to remove the substantial amount...
arxiv.org
January 6, 2025 at 3:34 AM
Reposted by Kaighin McColl
Really interesting work here from @dficklin.bsky.social and a stellar cast of coauthors: 'Vegetation Greening Mitigates the Impacts of Increasing Extreme Rainfall on Runoff Events' agupubs.onlinelibrary.wiley.com/doi/full/10....
Vegetation Greening Mitigates the Impacts of Increasing Extreme Rainfall on Runoff Events
The number and magnitude of extreme rainfall events are projected to increase throughout the global land surface Projected declines in event-based runoff ratio are found for a majority of the glo...
agupubs.onlinelibrary.wiley.com
December 20, 2024 at 4:59 PM
Reposted by Kaighin McColl
New preprint-> @czarakas.bsky.social shows that land-atm feedbacks occur in wet places! The "classic" view is soil moisture and precip can be correlated in dry-ish regions. We find a bigger role of the atm in wet places, where ET is dampened by lower evap demand. essopenarchive.org/doi/full/10....
Land-Atmosphere Feedbacks Dampen Surface Evapotranspiration Fluxes in Wet Regions
Terrestrial processes control land-to-atmosphere fluxes of water, energy, and carbon and are also influenced by climate. Feedbacks in the land-atmosphere coupled system can therefore potentially modul...
essopenarchive.org
December 11, 2024 at 5:31 PM
Reposted by Kaighin McColl
Late-breaking job ad for a tenure-track position in climate science (broadly defined) at Harvard. The committee will start reviewing applications on January 21, 2025. Please share with interested candidates.
academicpositions.harvard.edu/postings/14496
Tenure-Track Professor in Climate Science
The Department of Earth & Planetary Sciences (EPS) invites applications for a tenure-track faculty position in Climate Science. Climate Science is broadly defined and includes the study of the atmosph...
academicpositions.harvard.edu
December 17, 2024 at 2:51 PM
Late-breaking job ad for a tenure-track position in climate science (broadly defined) at Harvard. The committee will start reviewing applications on January 21, 2025. Please share with interested candidates.
academicpositions.harvard.edu/postings/14496
Tenure-Track Professor in Climate Science
The Department of Earth & Planetary Sciences (EPS) invites applications for a tenure-track faculty position in Climate Science. Climate Science is broadly defined and includes the study of the atmosph...
academicpositions.harvard.edu
December 17, 2024 at 2:51 PM
New paper: painting neighborhoods white is one way to offset warming from climate change. But, we show that doing this perversely causes temperatures to INCREASE in surrounding neighborhoods, due to unintended impacts on rainfall. This increases heat inequality.

doi.org/10.1029/2024...
December 3, 2024 at 7:29 PM
Reposted by Kaighin McColl
one of my Twitter bangers from 2021, reproduced here, with minor editing:

I've been collecting "lessons I've learned communicating climate on Twitter" over the last 8 years and finally thought I'd write a 🧵. This is mainly aimed at younger scientists, but others might find it useful.
November 22, 2024 at 4:42 PM
Reposted by Kaighin McColl
Our review of the direct response of stomata to temperature just came out in an issue (OK, it was 3 months ago but I just noticed).

We cover what (little) is known, & possible mechanisms and implications.

Several more papers in the works. Watch this space!

onlinelibrary.wiley.com/doi/abs/10.1...
The poorly‐explored stomatal response to temperature at constant evaporative demand
The direct response of stomata to temperature (the response when evaporative demand is held constant by adjusting ambient humidity) is very poorly known. This review summarises the current state of k...
onlinelibrary.wiley.com
November 14, 2024 at 2:21 AM
Starts in 45 minutes...
I'm giving a virtual talk today (November 18) at 2 pm ET. All welcome. It's on a simple theory for near-surface relative humidity over land. Among other things, the theory has major implications for projected changes in aridity with warming.
essic.umd.edu/events/an-an...
November 18, 2024 at 6:15 PM
I'm giving a virtual talk today (November 18) at 2 pm ET. All welcome. It's on a simple theory for near-surface relative humidity over land. Among other things, the theory has major implications for projected changes in aridity with warming.
essic.umd.edu/events/an-an...
November 18, 2024 at 1:45 PM
Reposted by Kaighin McColl
Do you write grants that require listing your recent collaborators? Creating that list can take a long time, but this page does the work for you! This will save the scientific community many thousands of hours. Thanks, Jordan! 🧪
NSF makes you say who you got conflicts (coauthored) with. We (really just Jordan Matelsky) just built you a tool for that. Literally one click: bib.experiments.kordinglab.com/nsf-coa
NSF COA | Jordan Matelsky
bib.experiments.kordinglab.com
November 12, 2024 at 7:42 AM
Reposted by Kaighin McColl
Delighted to share our perspective on theory and the future of land-climate science in Nature Geoscience

Free-to-view version: rdcu.be/dWEZI

www.nature.com/articles/s41...
Theory and the future of land-climate science
Nature Geoscience - Accelerating progress in land-climate science requires a renewed focus on developing theory to complement and underpin Earth system models and observations.
rdcu.be
October 14, 2024 at 2:38 PM
New paper: Why is relative humidity high in some places, and low in others? Surprisingly, there is no simple answer to this question, at least for the part of the atmosphere that we live in (near the land surface). We provide one.

journals.ametsoc.org/view/journal...
November 15, 2024 at 11:55 AM