Joshua B. Fisher
@jbfisher.bsky.social
Associate Professor of Environmental Science & Policy at Chapman University
Science Lead at Hydrosat, Inc.
Project Scientist at UCLA
Former ECOSTRESS Science Lead at NASA JPL
Opinions mine
Science Lead at Hydrosat, Inc.
Project Scientist at UCLA
Former ECOSTRESS Science Lead at NASA JPL
Opinions mine
I was named to the 2025 world’s “most influential” (top 1% by citations) scientists list (Clarivate Highly Cited Researchers 2025)!
November 19, 2025 at 3:42 AM
I was named to the 2025 world’s “most influential” (top 1% by citations) scientists list (Clarivate Highly Cited Researchers 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/wp-content/u...
nmdoj.gov
November 18, 2025 at 10:38 PM
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/wp-content/u...
Reposted by Joshua B. Fisher
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.
September 4, 2025 at 10:42 PM
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.
Reposted by Joshua B. Fisher
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
August 20, 2025 at 12:38 PM
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
The Gifford Fire is the largest fire thus far this year in California. Captured by ECOSTRESS.
Data visualized by high-school student Krishiv Jaini
Data visualized by high-school student Krishiv Jaini
August 11, 2025 at 11:55 PM
The Gifford Fire is the largest fire thus far this year in California. Captured by ECOSTRESS.
Data visualized by high-school student Krishiv Jaini
Data visualized by high-school student Krishiv Jaini
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.
Data visualized by high-school student Kaitlin Cho.
August 11, 2025 at 11:52 PM
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.
Data visualized by high-school student Kaitlin Cho.
Happening now! Largest fire in France in nearly a hundred years. Captured by ECOSTRESS.
Data visualized by high school student Bill Chen.
Data visualized by high school student Bill Chen.
August 9, 2025 at 9:04 PM
Happening now! Largest fire in France in nearly a hundred years. Captured by ECOSTRESS.
Data visualized by high school student Bill Chen.
Data visualized by high school student Bill Chen.
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
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
August 9, 2025 at 2:56 AM
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
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
Sending ❤️ to Portugal, half of which is on fire right now. This fire, outside of Serabigões, captured by ECOSTRESS a few days ago.
August 6, 2025 at 5:06 AM
Sending ❤️ to Portugal, half of which is on fire right now. This fire, outside of Serabigões, captured by ECOSTRESS a few days ago.
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.
Image captured by 16-year-old Shreyas Chatterjee working with me this summer.
August 4, 2025 at 6:03 AM
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.
Image captured by 16-year-old Shreyas Chatterjee working with me this summer.
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.
August 1, 2025 at 5:07 AM
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.
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.
July 30, 2025 at 8:37 PM
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.
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!
July 3, 2025 at 4:50 PM
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!
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
www.nature.com/articles/s41...
@drwkid.bsky.social
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
www.nature.com
July 1, 2025 at 11:34 PM
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
www.nature.com/articles/s41...
@drwkid.bsky.social
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....
zslpublications.onlinelibrary.wiley.com/doi/full/10....
June 29, 2025 at 6:19 AM
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....
zslpublications.onlinelibrary.wiley.com/doi/full/10....
Reposted by Joshua B. Fisher
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,…
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 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…
spacenews.com
June 5, 2025 at 1:00 PM
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,…
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,…
Reposted by Joshua B. Fisher
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.
Bloodbath is right.
May 31, 2025 at 3:00 AM
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.
Bloodbath is right.
Reposted by Joshua B. Fisher
"The Great Wave" of carbon dioxide (CO₂) #ClimateChange #ScienceArt
Graphic produced by robbieandrew.github.io
Graphic produced by robbieandrew.github.io
May 31, 2025 at 1:48 AM
"The Great Wave" of carbon dioxide (CO₂) #ClimateChange #ScienceArt
Graphic produced by robbieandrew.github.io
Graphic produced by robbieandrew.github.io
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/ErEM0vdYk-4
Holland Hatch graduation commencement speech at Chapman University 2025
YouTube video by Josh Fisher
youtu.be
May 25, 2025 at 5:38 AM
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/ErEM0vdYk-4
Reposted by Joshua B. Fisher
Please delight yourselves in the magic of belowground research! wur.yuja.com/V/Video?v=89... Amazing video produced by the team of @moniqueweemstra.bsky.social from Wageningen University
Riddles in the Dark
In the dense and biodiverse San Emilio ForestGEO plot of Costa Rica, every tree tells a story. Not just above ground, but deep below the surface. Discover how different trees adapt to their environmen...
wur.yuja.com
May 20, 2025 at 11:59 AM
Please delight yourselves in the magic of belowground research! wur.yuja.com/V/Video?v=89... Amazing video produced by the team of @moniqueweemstra.bsky.social from Wageningen University
Currently in Costa Rica with a NASA team flying drones over my elevated CO2 sites.
NASA/Milan Loiacono
NASA/Milan Loiacono
May 18, 2025 at 4:05 AM
Currently in Costa Rica with a NASA team flying drones over my elevated CO2 sites.
NASA/Milan Loiacono
NASA/Milan Loiacono
Some of my recent work in here:
NASA Satellite Images Could Provide Early Volcano Warnings
www.nasa.gov/earth/natura...
NASA Satellite Images Could Provide Early Volcano Warnings
www.nasa.gov/earth/natura...
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
www.nasa.gov
May 17, 2025 at 3:07 PM
Some of my recent work in here:
NASA Satellite Images Could Provide Early Volcano Warnings
www.nasa.gov/earth/natura...
NASA Satellite Images Could Provide Early Volcano Warnings
www.nasa.gov/earth/natura...
New paper on the latest in science and applications synergies between high-resolution soil moisture and ET!
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
May 14, 2025 at 1:17 PM
New paper on the latest in science and applications synergies between high-resolution soil moisture and ET!
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...