Troy Magney
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troymagney.bsky.social
Troy Magney
@troymagney.bsky.social
1.2K followers 370 following 17 posts
Plant ecophysiology, ecosystem ecology, tinkering | Plant Optics Lab @ University of Montana | https://magneylab.ucdavis.edu
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Reposted by Troy Magney
ucdavisplants.bsky.social
🍇Hyperspectral leaf reflectance predicts #grape berry Brix, pH, and acid across varieties and stages. Useful for harvest timing. (Troy S. Magney, Fallon Ely, Alexandra Z. Basquette, Jessica Lyons, Devin P. McHugh, Elisabeth J. Forrestel)
▶️ acsess.onlinelibrary.wiley.com/doi/10.1002/...
#PlantScience
Foliar and berry hyperspectral reflectance predicts winegrape berry composition across developmental stages and varieties
Hyperspectral reflectance of leaves and berries for predicting grapevine berry composition. Partial least square regression (PLSR) model calibrated and validated across 23 varieties over two growing.....
acsess.onlinelibrary.wiley.com
June 30, 2025 at 4:54 PM
troymagney.bsky.social
Feels surreal but this is my last week at UC Davis. Time is truly an enigma.

…after five great years, I will be moving to the University of Montana, as an Associate Professor and W.A. Franke Endowed Chair in the Department of Forest Management🌲🏔️and I could not be more excited. @umontana.bsky.social
June 25, 2025 at 6:00 PM
Reposted by Troy Magney
ucdavisplants.bsky.social
🍓From Computers and Electronics in Agriculture: Strawberry yield forecasting improves using YOLO phenology detection with weighted LSTM time-series models. (Andres Montes de Oca, Troy Magney, Stavros G. Vougioukas, Steven A. Fennimore, Mason Earles)
▶️ www.sciencedirect.com/science/arti...
Fig. 1. Data was collected over 4 acres in the USDA-ARS research farm located at Spence Rd., Salinas, CA. Data collection is done using a sensing kit equipped with: (1) Onboard computer, (2) Cellular module, (3) GPS, and (4) 2 RGB cameras.
June 16, 2025 at 4:06 PM
Reposted by Troy Magney
ucdavisplants.bsky.social
🖥️ From Ecological Modelling: Solar-induced chlorophyll fluorescence (SIF) - informed models improve crop gross primary production (GPP) estimates. New DayCent framework uses mechanistic light response and outperforms RUE. (Troy S. Magney, Francis Ulep)
▶️ www.sciencedirect.com/science/arti...
Fig. 5. Marginal posterior density of MLR-SIF parameter of KDF from Bayesian calibration process.
April 17, 2025 at 5:41 PM
Reposted by Troy Magney
eos.org
New research from @w-u-r.bsky.social shows that the world’s coldest forests will lose their tree covers because of continued warming. Story by @ktjandra.bsky.social

eos.org/articles/bor...
Boreal Forests May Be on the Move - Eos
A new model shows a tendency for tree cover to decline in warmer areas and increase in colder ones.
eos.org
February 3, 2025 at 2:41 PM
Reposted by Troy Magney
wkolby.bsky.social
Happy to share a new paper, "Effects of Hot Versus Dry Vapor Pressure Deficit on Ecosystem Carbon and Water Fluxes," led by the amazing Miriam Johnston w/ @mallorybarnes.bsky.social and others agupubs.onlinelibrary.wiley.com/doi/10.1029/...
January 27, 2025 at 4:56 PM
troymagney.bsky.social
New Tansley review paper from Zoe Pierrat & friends in @newphyt.bsky.social linking proximal remote sensing with ecosystem fluxes!

Synergies and best practices for hyperspectral reflectance, SIF, thermal, microwave and lidar 🌈🌲🗼🛰️🧪
nph.onlinelibrary.wiley.com/doi/10.1111/...
Overview of proximal remote sensing instruments at a flux tower site. Shown are three eddy-covariance towers with sonic anemometers collecting data to derive ecosystem fluxes. Shown for spectral reflectance and solar-induced fluorescence (SIF) is a hyperspectral sensor with a narrow field-of-view (FOV) and multi-directional scanning capabilities (Sections II.1 and II.2). We also show the direct emission of SIF from the forest canopy (Section II.2). For thermal infrared radiation, we show a fixed thermal camera and thermal radiation coming from the canopy (Section II.3). For microwave, we show two potential arrangements with antenna A receiving direct signals from under open-sky conditions as well as signals that are reflected from the underlying vegetated surface, and antenna B receiving a direct signal that is propagated downward through the vegetation canopy and attenuated by its moisture content (Section II.4). We also show a light detection and ranging (LiDAR) instrument emitting light to get a 3D representation of canopy structure (Section II.5). Above the forest are a drone, aircraft, and satellite to emphasize the potential of proximal remote sensing to complement observations across scales. In the inset plot, we show sample reflectance spectra for vegetation and wet soil and highlight key wavelength ranges for spectral reflectance. We also show typical SIF retrieval windows and LiDAR emission windows. Next to the reflectance spectra, we show sample radiance in the thermal infrared region, with example spectra for warm soil and cool vegetation. Finally, we show key measurement wavelength bands for microwave backscatter.
January 23, 2025 at 6:23 PM
Reposted by Troy Magney
profdesai.bsky.social
Flux Course, Spanish language edition, June 22-July 5 2025 in Mexico! Apply by Jan 31 for instructor or Mar 28 as student at fluxnet.org/tafe/
Details of the Flux Course Mexico - more at https://fluxnet.org/tafe/
January 15, 2025 at 7:43 PM
troymagney.bsky.social
Future #climate projections of tree cover suggest the boreal forest is headed for an open state (⬇️🌲in south & ⬆️🌲in north)

But, how will boreal tree cover dynamics influence—and be influenced by—climate feedbacks?

We discuss this in a new commentary @pnas.org. 🧪
www.pnas.org/doi/10.1073/...
Simplified conceptual diagram of potential feedbacks associated with a projected open forest state in the year 2100. The transition to an open forest state is closely tied to feedback processes such as changes in biomass and species composition, disturbance (wildfire, insects, wind), albedo, water availability, and permafrost dynamics
January 14, 2025 at 3:39 PM
Reposted by Troy Magney
renatobrgh.bsky.social
#JPL has so far been safe as well thanks to round the clock work of our first responders. But over 150 JPLers have lost homes that we know of so far. We are raising funds to support them through Caltech!

Please consider supporting:

caltech.imodules.com/controls/ema...

Thank you!
January 10, 2025 at 7:15 PM
Reposted by Troy Magney
albert-loren.bsky.social
Hello Blue Sky! Good to be here. How well can leaf reflectance spectra predict hydraulic traits in Amazon trees? Find out in our new RSE article led by Dr. Maquelle Garcia! authors.elsevier.com/c/1kGKn7qzT3...
authors.elsevier.com
January 10, 2025 at 8:12 AM
troymagney.bsky.social
Why does hyperspectral reflectance work for tracking plant physiological dynamics?

I recently wrote a commentary for @newphyt.bsky.social about that, targeted for a broad audience of plant scientists 🍃🌈🧪

nph.onlinelibrary.wiley.com/doi/10.1111/...
Hyperspectral reflectance integrates key traits for predicting leaf metabolism
Click on the article title to read more.
nph.onlinelibrary.wiley.com
December 16, 2024 at 4:31 PM
Reposted by Troy Magney
benbondlamberty.bsky.social
Scientists are expected to do peer reviewing but no one tells you HOW. After talking with several folks about this today at #AGU24 , it seems a good time to link to this presentation I made several years ago -- feel free to use/share! docs.google.com/presentation...
Effective, efficient, and fair peer reviewing 2023
Effective, efficient, and fair peer reviewing Ben Bond-Lamberty Based on a presentation at the AGU Early Career Scientist Workshop, 2019 1
docs.google.com
December 12, 2024 at 10:18 PM
troymagney.bsky.social
I sadly won't be at #AGU24 this year, but some of our lab members and science will be! 🍃🌈🌎🧪
December 9, 2024 at 2:17 PM
Reposted by Troy Magney
mostafaj.bsky.social
🌿📷🌡️ Calling all #NearSurfaceRemoteSensing enthusiasts at #AGU24!
Join us for the session "B21B – Advancing Environmental Monitoring through Near-Surface Imaging Technologies"
📅 Tuesday
⏰ 8:30–10:00 AM
📍 Room 151B
December 4, 2024 at 5:26 PM
Reposted by Troy Magney
profdesai.bsky.social
Looking for the latest global #fluxnet carbon NEE, water, GPP, transpiration upscaling 2001-2021 (daily 0.25 degree, monthly 0.05 deg) - Fluxcom-X paper now out in Biogeosciences: @jakenelson.bsky.social and crew, X-BASE: bg.copernicus.org/articles/21/... Data at: meta.icos-cp.eu/collections/...
X-BASE: the first terrestrial carbon and water flux products from an extended data-driven scaling framework, FLUXCOM-X
Abstract. Mapping in situ eddy covariance measurements of terrestrial land–atmosphere fluxes to the globe is a key method for diagnosing the Earth system from a data-driven perspective. We describe th...
bg.copernicus.org
November 18, 2024 at 1:52 PM
Reposted by Troy Magney
tombuckleylab.bsky.social
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
troymagney.bsky.social
Book chapter pre-print on scaling forest ecophysiology using optical techniques. 🍃->🌲🌳->🌎

It was impossible to cover as much as I wanted to, but wanted to share in case anyone has useful feedback, I'd love to hear from you and change accordingly!

essopenarchive.org/users/534071...
November 13, 2024 at 12:48 AM
troymagney.bsky.social
New paper in Ecology! 🌲❄️

"Seasonal timing of fluorescence and photosynthetic yields at needle and canopy scales in evergreen needleleaf forests" by Zoe Pierrat et al.

esajournals.onlinelibrary.wiley.com/doi/10.1002/...

PS I'm going to start using bsky more :)
August 20, 2024 at 5:24 PM
troymagney.bsky.social
Recent install of TSWIFT (Tower-Spectrometer on Wheels Investigating Frequent Timeseries) at Tonzi Ranch - excited to link optical and energy fluxes at this iconic oak savannah woodland site!

@ucdavisplants.bsky.social
February 21, 2024 at 6:39 PM
Reposted by Troy Magney
mallorybarnes.bsky.social
🌳 🌡️ For my first post here, I'm thrilled to share our latest research! We show how extensive reforestation in the SE US contributed to regional cooling in the 20th century. We also highlight the potential benefits of temperate zone reforestation for local & regional climate adaptation. 🌎 💚
A Century of Reforestation Reduced Anthropogenic Warming in the Eastern United States
<em>Earth's Future</em> is a transdisciplinary, open access AGU journal examining the state of the planet, sustainable and resilient societies, and the science of the Anthropocene.
agupubs.onlinelibrary.wiley.com
February 14, 2024 at 2:55 PM
troymagney.bsky.social
Really excited to share with my small following here this paper that summarizes the last 5 years of our work trying to understand how to track photosynthesis in evergreen forests across scales 🌲🌈

Led by Zoe Pierrat, and published in BioScience!

tinyurl.com/bioscizp
January 9, 2024 at 8:47 PM
troymagney.bsky.social
Looking forward to #AGU23! Come find these great scientists and humans from the Plant Optics Lab

Scientific Program link to our stuff: tinyurl.com/PlantOpticsL...
December 7, 2023 at 3:49 PM
troymagney.bsky.social
here's to hoping this platform takes off, I finally made it
November 8, 2023 at 5:00 PM