Sign in

Joshua B. Fisher

@jbfisher.bsky.social
280 followers 23 following 57 posts

Associate Professor of Environmental Science & Policy at Chapman University Science Lead at Hydrosat, Inc. Former ECOSTRESS Science Lead at NASA JPL Opinions mine

PostsRepliesMedia
Joshua B. Fisher @jbfisher.bsky.social · 24/09/2026
Today I was selected as an AGU Union Fellow!! This is so cool. Joining a great list of people I look up to and respect. www.agu.org/honors/annou...
agu.org
2026 Honorees Announcement | AGU
We applaud the 2026 Honoree’s achievements and thank all volunteers, nominators and supporters for their commitment to this program.
020
Reposted by Joshua B. Fisher
Belinda Medlyn @bmedlyn.bsky.social · 11/08/2026
EucFACE is looking for a new technical engineer! Please share with skilled engineers interested in working at our flagship forest free-air CO2 enrichment experiment in Western Sydney @westsyduhie.bsky.social jobs.smartrecruiters.com/WesternSydne...
View of a Free-Air CO2 Enrichment ring in a eucalypt canopy, with crane above. Beautiful blue sky. A fantastic work environment!
087
Reposted by Joshua B. Fisher
Greg Goldsmith @canopyinclouds.bsky.social · 22/07/2026
Our group @ecologicalsociety.bsky.social #ESA2026: LB11-129-Diurnal hysteresis of GPP in a tropical forest PS26-105-C and N cycling in tropical forests w/ elevated CO2 COS179-04-LiDAR vegetation structure in tropical forests w/ elevated CO2 LB20-201-A preliminary inventory of ET for Portugal
072
Joshua B. Fisher @jbfisher.bsky.social · 11/05/2026
Evapotranspiration Everywhere, All the Time: Towards a Unified View From Earth Observation onlinelibrary.wiley.com/doi/10.1111/... @youngryel.bsky.social
onlinelibrary.wiley.com
Evapotranspiration Everywhere, All the Time: Towards a Unified View From Earth Observation
This paper discusses the evolution and revolution of Earth observation for evapotranspiration (ET), as we advanced from the first Landsat satellite and development of ET models through the progressio...
133
Joshua B. Fisher @jbfisher.bsky.social · 13/04/2026
Our work made the front page of the OC Register Sunday paper. (I might add that my student, Ashley, and our work were above Sabrina Carpenter and Coachella...) www.ocregister.com/2026/04/12/p...
010
Joshua B. Fisher @jbfisher.bsky.social · 18/01/2026
news.chapman.edu/2026/01/14/w...
news.chapman.edu
What Can You Do With an Environmental Science Degree?
This guide breaks down environmental science careers, job outlook, skills, and education pathways.
000
Joshua B. Fisher @jbfisher.bsky.social · 15/01/2026
"Hydrosat…so hot right now." 🔥🔥🔥🛰️ payloadspace.com/hydrosat-clo...
payloadspace.com
Hydrosat Closes $60M Series B to Grow Its Constellation
Hydrosat plans to use the new funds to expand beyond its two sats in orbit, and double its workforce to keep up with growing demand.
010
Joshua B. Fisher @jbfisher.bsky.social · 18/12/2025
Climate change has increased global evaporative demand, except in S. Asia... Find out why/how inside! www.nature.com/articles/s43...
doi.org
Climate change has increased global evaporative demand except in South Asia - Communications Earth & Environment
Irrigation in South Asia has increased soil and air moisture, leading to more cloud cover and reduced solar radiation, which has regionally counteracted the global rise in evaporative demand, accordin...
021
Joshua B. Fisher @jbfisher.bsky.social · 19/11/2025
I was named to the 2025 world’s “most influential” (top 1% by citations) scientists list (Clarivate Highly Cited Researchers 2025)!
010
Joshua B. Fisher @jbfisher.bsky.social · 18/11/2025
Evapotranspiration data from OpenET were used in a US Supreme Court agreement between New Mexico, Texas, and Colorado over shared/disputed water. This is the first time that satellite remote sensing has been used in the US Supreme Court. nmdoj.gov/wp-content/u...
nmdoj.gov
010
Joshua B. Fisher @jbfisher.bsky.social · 23/09/2025
news.chapman.edu/2025/09/23/c...
news.chapman.edu
Chapman University Rises Nearly 10% in U.S. News & World Report Rankings
Chapman University has once again advanced in the annual U.S. News & World Report rankings of America’s Best Colleges, climbing 11 spots nationally. The new ranking continues Chapman’s upward trajecto...
010
Reposted by Joshua B. Fisher
Kali Middleby @kalimiddleby.bsky.social · 04/09/2025
Featured on the cover of @globalchangebio.bsky.social is a thermal image of Elaeocarpus Grandis taken at @jcuofficial.bsky.social Daintree Rainforest Observatory. In this species we find that populations originating from warmer climates have narrower leaves with higher rates of water loss.
0195
Reposted by Joshua B. Fisher
Charlotte Grossiord @charlottegrossiord.bsky.social · 20/08/2025
New PhD position in Plant Ecophysiology🌳 Study how atmospheric & soil drought shape tree carbon & water relations at the VPDrought experiment in Switzerland. Start Jan 2026. Apply here: m.refline.ch/273855/1759/... @wslresearch.bsky.social
15559
Joshua B. Fisher @jbfisher.bsky.social · 12/08/2025
The Gifford Fire is the largest fire thus far this year in California. Captured by ECOSTRESS. Data visualized by high-school student Krishiv Jaini
010
Joshua B. Fisher @jbfisher.bsky.social · 12/08/2025
Phoenix just hit the hottest Aug day in recorded history. ECOSTRESS saw it a couple days before with temps of 124F/51C at 9.20AM. Data visualized by high-school student Kaitlin Cho.
020
Joshua B. Fisher @jbfisher.bsky.social · 09/08/2025
Happening now! Largest fire in France in nearly a hundred years. Captured by ECOSTRESS. Data visualized by high school student Bill Chen.
020
Joshua B. Fisher @jbfisher.bsky.social · 09/08/2025
Compilation of fires burning in Portugal as captured by ECOSTRESS. This image was a collaboration from multiple high school students piecing together the individual fires. Bill Chen Kaitlin Cho Krishiv Jaini Taara Reddy Ray Schaffer Lucas Zaninovich
020
Joshua B. Fisher @jbfisher.bsky.social · 06/08/2025
Sending ❤️ to Portugal, half of which is on fire right now. This fire, outside of Serabigões, captured by ECOSTRESS a few days ago.
020
Joshua B. Fisher @jbfisher.bsky.social · 04/08/2025
Interesting volcanic activity happening at Hawai’i, captured by ECOSTRESS. Volcanic activity here seems to have accelerated anomalously since Dec. Image captured by 16-year-old Shreyas Chatterjee working with me this summer.
010
Joshua B. Fisher @jbfisher.bsky.social · 01/08/2025
Progression of Evaporative Stress from ECOSTRESS leading up to the Palisades fire in LA earlier this year. Things start off generally alright, then those winds smacked into LA and fast-dried the veg, which fueled the uncontrollable fires.
121
Joshua B. Fisher @jbfisher.bsky.social · 30/07/2025
One of my students, Bill Chen, was looking at the Airport Fire in SoCal from last year using ECOSTRESS. Interesting to see the topographic variability in the temperatures.
010
Joshua B. Fisher @jbfisher.bsky.social · 17/07/2025
www.newyorker.com/magazine/202...
newyorker.com
Do We Need Another Green Revolution?
As the global population grows, we’ll have to find ways of feeding the planet without accelerating climate change.
000
Joshua B. Fisher @jbfisher.bsky.social · 03/07/2025
Hydrosat picked up this scorching heatwave sweeping Europe yesterday. Surface temperatures exceeding 67C/150F! It’s great that we can now capture these temps at high resolution globally and with increasing frequency towards daily as we continue to get our constellation online. Stay safe out there!
031
Joshua B. Fisher @jbfisher.bsky.social · 02/07/2025
Another new paper published today using ECOSTRESS again to predict wildfire—this time burn severity—one week before occurrence across New Mexico. This paper also outlines a framework for using machine learning with these data and applications. www.nature.com/articles/s41... @drwkid.bsky.social
nature.com
Assessment of spatial autocorrelation and scalability in fine-scale wildfire random forest prediction models - Scientific Reports
Scientific Reports - Assessment of spatial autocorrelation and scalability in fine-scale wildfire random forest prediction models
032
Joshua B. Fisher @jbfisher.bsky.social · 29/06/2025
New paper using ECOSTRESS and machine learning that predicted Australia’s black summer fires a week ahead of occurrence, mostly using high resolution water use efficiency and evaporative stress data. zslpublications.onlinelibrary.wiley.com/doi/full/10....
053
Reposted by Joshua B. Fisher
SpaceNews @spacenewsinc.bsky.social · 05/06/2025
Hydrosat poised to launch second thermal-infrared satellite SAN FRANCISCO -- Hydrosat announced plans June 5 to gather thermal-infrared imagery with a second satellite launching later this month on the SpaceX Transporter-14 rideshare. VanZyl-2 has four times the imaging capacity of VanZyl-1,…
spacenews.com
Hydrosat poised to launch second thermal-infrared satellite
SAN FRANCISCO -- Hydrosat announced plans June 5 to gather thermal-infrared imagery with a second satellite launching later this month on the SpaceX Transporter-14 rideshare. VanZyl-2 has four times the imaging capacity of VanZyl-1, Hydrosat's first spacecraft launched in August. VanZyl-1 observes 2 million square kilometers daily. “On our VanZyl-2 satellite we are able to image 8 million square kilometers per day,” Pieter Fossel, CEO of Washington-based Hydrosat, told…
041
Reposted by Joshua B. Fisher
Paul Byrne @theplanetaryguy.com · 31/05/2025
Inspired by @jtuttlekeane.bsky.social and @ohdearz.bsky.social, here's what the White House proposed budget cuts to NASA would do to the entirety of the agency's Science Mission Directorate. Bloodbath is right.
27702320
Reposted by Joshua B. Fisher
Zack Labe @zacklabe.com · 31/05/2025
"The Great Wave" of carbon dioxide (CO₂) #ClimateChange #ScienceArt Graphic produced by robbieandrew.github.io
Graph of carbon dioxide designed as the painting of "The Great Wave off Kanagawa" by Katsushika Hokusai.
15474183
Joshua B. Fisher @jbfisher.bsky.social · 25/05/2025
My student, Holland Hatch, graduated today, won the top award for our major, and was selected to give the commencement speech. She’s traveled with me to Costa Rica & New Mexico serving key leadership roles. In short, she’s been amazing. I will miss her and wish her the best. youtu.be/ErEM0vdYk-4
youtu.be
Holland Hatch graduation commencement speech at Chapman University 2025
YouTube video by Josh Fisher
030
Joshua B. Fisher @jbfisher.bsky.social · 18/05/2025
Currently in Costa Rica with a NASA team flying drones over my elevated CO2 sites. NASA/Milan Loiacono
040
Joshua B. Fisher @jbfisher.bsky.social · 17/05/2025
Some of my recent work in here: NASA Satellite Images Could Provide Early Volcano Warnings www.nasa.gov/earth/natura...
nasa.gov
NASA Satellite Images Could Provide Early Volcano Warnings  - NASA
Scientists know that changing tree leaves can indicate when a nearby volcano is becoming more active and might erupt. In a new collaboration between NASA and
030
Joshua B. Fisher @jbfisher.bsky.social · 14/05/2025
New paper on the latest in science and applications synergies between high-resolution soil moisture and ET! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
020
Joshua B. Fisher @jbfisher.bsky.social · 25/04/2025
www.youtube.com/watch?v=13up...
youtube.com
Fieldwork Research at Chapman University
YouTube video by Schmid College, Chapman University
030
Reposted by Joshua B. Fisher
Eos @eos.org · 16/04/2025
The evidence- and project-based approach of instructional materials designed for “Observing Earth from Above,” offers a model for STEM education that can transform students’ attitudes toward science. eos.org/science-upda...
eos.org
A Diverse New Generation of Scientists Observes Earth from Above - Eos
Project-based learning and a modular class design help students from various backgrounds and universities gain hands-on experience with environmental remote sensing.
121
Joshua B. Fisher @jbfisher.bsky.social · 16/04/2025
Work led by Robert Bogue linked to our ELEVATE project using geological CO2 as a natural FACE experiment. Trees got greener with more CO2. Biological CO2 sensors and data loggers! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
000
Joshua B. Fisher @jbfisher.bsky.social · 15/04/2025
Today I went to the OC Fire Authority Headquarters and Emergency Command Center. We learned about their critical information needs and how we can integrate our technology into their decision-support systems to optimize fire management and emergency response.
030
Reposted by Joshua B. Fisher
FLUXNET @fluxnet.bsky.social · 10/04/2025
We’re excited to launch Meet the Fluxers, a podcast bridging the gap between eddy covariance flux scientists and people whose work and lives are influenced by ecosystem fluxes. fluxnet.org/2025/04/10/i...
fluxnet.org
Introducing Meet the Fluxers - FLUXNET
(blog post from Maoya Bassiouni) We’re excited to launch Meet the Fluxers, a podcast bridging the gap between eddy covariance flux scientists and people whose work and lives are influenced... More
0117
Joshua B. Fisher @jbfisher.bsky.social · 31/03/2025
Hydrosat has been named one of TIME’s Top Greentech Companies of 2025! It’s validating to be recognized that our work is driving meaningful climate impact through innovation. time.com/collection/a...
time.com
America's Top GreenTech Companies of 2025
TIME and Statista have named 250 companies reducing environmental impact
000
Joshua B. Fisher @jbfisher.bsky.social · 25/03/2025
I'm very excited to share some of Hydrosat's new data from our first satellite! We really can get high resolution thermal (+VNIR) data from space at a very small fraction of the cost of traditional satellites. The future is bright for TIR remote sensing! hydrosat.com/2025/03/25/h...
061
Joshua B. Fisher @jbfisher.bsky.social · 13/03/2025
ECOSTRESS detects Submarine Ground Water Discharge science.iirs.gov.in/ecostress-de...
science.iirs.gov.in
ECOSTRESS detects Submarine Ground Water Discharge (SGD) near Okha Coast, Gujarat, India - Sudhur Manthan Science Portal of IIRS
Ashish Joshi, Suresh Kannaujiya, Shefali Agarwal, R. S. Chatterjee and R. P. Singh Submarine groundwater discharge (SGD) is the flow of groundwater from land to sea that occurs in the sub-surface. Gro...
010
Reposted by Joshua B. Fisher
Trevor Keenan @trevorkeenan.bsky.social · 10/03/2025
Earthshot Labs is hiring! If you are a remote sensing scientist with experience using satellite observations for advanced forestry applications, take a look and consider applying. It is a fantastic team on a mission to restore and protect forests worldwide. www.linkedin.com/jobs/view/40...
linkedin.com
Earthshot hiring Senior Geospatial Data Scientist in United States | LinkedIn
Posted 10:47:19 PM. Apply here: https://forms.gle/WE7uZyKW1ysmzdh39Earthshot is a climate tech company focused on…See this and similar jobs on LinkedIn.
12121
Reposted by Joshua B. Fisher
Science Magazine @science.org · 19/02/2025
Scientists are now organizing events, called Stand Up for Science, on 7 March in Washington, D.C., and state capitals. So far, they have attracted more than 100 volunteers from some 30 states who are hoping to rally support for research as a public good. scim.ag/4328LAD
scim.ag
‘I really wanted something to happen.’ The students behind the Stand Up for Science protests
New group hopes to turn out researchers for 7 March demonstrations against Trump administration policies
2723360
Reposted by Joshua B. Fisher
Dr. Cynthia Chang @drcynthiacchang.bsky.social · 19/02/2025
The committee on Science, Space, and Technology are collecting testimony of Federal employees fired in the past days. Please share with your colleagues and friends. The more testimony, the better we can argue against this injustice.
democrats-science.house.gov
Were you fired by President Trump? | House Committee on Science, Space and Technology
The House Committee on Science, Space and Technology
011980
Joshua B. Fisher @jbfisher.bsky.social · 05/02/2025
020
Joshua B. Fisher @jbfisher.bsky.social · 03/02/2025
Taking some air quality measurements at the [former] home of my friend, Blake. We also tested air and took soil samples from the nearby school that Blake and his community is considering putting their kids back into.
020
Joshua B. Fisher @jbfisher.bsky.social · 02/02/2025
I just got back from New Mexico training over a hundred state, federal, and university employees on how to use a new tool we developed for managing water resources. A water manager said our system is a "game changer...that will revolutionize our work," potentially saving the State millions of $.
150
Reposted by Joshua B. Fisher
Shawn Serbin @doctorjackpine.bsky.social · 24/01/2025
A cool paper led by Wouter Hantson and Dan Hayes at UMaine shows the results of our multi-year project in Alaska to study fine-scale permafrost gradients and their characteristics using #RemoteSensing. Together with Daryl Yang and @jbfisher.bsky.social. #NGEEArctic iopscience.iop.org/article/10.1...
An image showing the conceptual overview of the Arctic permafrost thaw gradients studied in the linked scientific article. A series of images on the left show different thaw gradient types, drained thaw lakes, ice wedge polygons, water tracks, and shrub encroachment from the top to bottom.  On the right is an image showing how to use remote sensing platforms to map of thaw gradients using drones, aircraft and satellites
092
Reposted by Joshua B. Fisher
Troy Magney @troymagney.bsky.social · 23/01/2025
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.
16529
Joshua B. Fisher @jbfisher.bsky.social · 19/01/2025
ECOSTRESS reveals pre-fire vegetation controls on burn severity for Southern California wildfires of 2020 onlinelibrary.wiley.com/doi/full/10....
onlinelibrary.wiley.com
ECOSTRESS reveals pre‐fire vegetation controls on burn severity for Southern California wildfires of 2020
Aim Topography, climate and plant water stress influence the spatial patterns of burn severity (damage to soils and vegetation associated with wildfires); however, the relative importance of these p...
010