Sami Rifai
@samirifai.bsky.social
Ecosystem ecologist and remote sensing enthusiast.
Reposted by Sami Rifai
My latest: The Trump administration is not waiting for the next fiscal year -- or Congress -- to cut climate science at NOAA. A new document details the money it won't spend *this* year on climate research.
Trump administration pushes ahead with NOAA climate and weather cuts
Despite congressional resistance, agency aims to cut research spending now
www.science.org
August 25, 2025 at 8:40 PM
My latest: The Trump administration is not waiting for the next fiscal year -- or Congress -- to cut climate science at NOAA. A new document details the money it won't spend *this* year on climate research.
Does anyone have suggestions for (moderately priced) phenocams with an NIR band that are still being manufactured?
I get the sense that the standard StarDot cameras are no longer being sold, but haven't found an alternative apart from Campbell's CCFC which looks amazing but is def not cheap.
I get the sense that the standard StarDot cameras are no longer being sold, but haven't found an alternative apart from Campbell's CCFC which looks amazing but is def not cheap.
August 18, 2025 at 1:31 AM
Does anyone have suggestions for (moderately priced) phenocams with an NIR band that are still being manufactured?
I get the sense that the standard StarDot cameras are no longer being sold, but haven't found an alternative apart from Campbell's CCFC which looks amazing but is def not cheap.
I get the sense that the standard StarDot cameras are no longer being sold, but haven't found an alternative apart from Campbell's CCFC which looks amazing but is def not cheap.
Reposted by Sami Rifai
🚨 If you're interested in working on a coordinated response to the DOE climate report, please enter your info on this google form 🚨
Please RT this so as many people see it as possible.
forms.gle/BL9xUAfRxA...
Please RT this so as many people see it as possible.
forms.gle/BL9xUAfRxA...
DOE climate report response form
We are collecting names to assemble a writing team to respond to the DOE climate working group report. If you'd like to contribute, enter your info below. At this point, there is no guarantee what we'll do (if anything), but we want to keep our options open by collecting names. If you have any further questions, feel free to email me.
We are primarily looking for Ph.D. scientists at universities or government labs in appropriate fields. I realize that this will exclude some qualified people and I apologize, but we felt this was necessary for a variety of reasons.
forms.gle
July 31, 2025 at 6:35 PM
🚨 If you're interested in working on a coordinated response to the DOE climate report, please enter your info on this google form 🚨
Please RT this so as many people see it as possible.
forms.gle/BL9xUAfRxA...
Please RT this so as many people see it as possible.
forms.gle/BL9xUAfRxA...
Rare(!) 4-year fellowship available here in South Australia, targeted to people with a few years of postdoc experience and < 8 years post PhD.
careers.adelaide.edu.au/cw/en/job/51...
careers.adelaide.edu.au/cw/en/job/51...
Learn more about South Australia's new university for the future.
careers.adelaide.edu.au
July 22, 2025 at 12:44 AM
Rare(!) 4-year fellowship available here in South Australia, targeted to people with a few years of postdoc experience and < 8 years post PhD.
careers.adelaide.edu.au/cw/en/job/51...
careers.adelaide.edu.au/cw/en/job/51...
Reposted by Sami Rifai
I have an opportunity for a new PhD student in tropical tree ecophysiology in my lab. Some more details at the link below. Please pass along!
www.findaphd.com/phds/project...
www.findaphd.com/phds/project...
Responses of tropical forest trees to rising carbon dioxide - conifers versus angiosperms at James Cook University on FindAPhD.com
PhD Project - Responses of tropical forest trees to rising carbon dioxide - conifers versus angiosperms at James Cook University, listed on FindAPhD.com
www.findaphd.com
June 17, 2025 at 10:41 PM
I have an opportunity for a new PhD student in tropical tree ecophysiology in my lab. Some more details at the link below. Please pass along!
www.findaphd.com/phds/project...
www.findaphd.com/phds/project...
Reposted by Sami Rifai
New Article: "Leaf venation network evolution across clades and scales" rdcu.be/epLNP
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
June 6, 2025 at 5:24 PM
New Article: "Leaf venation network evolution across clades and scales" rdcu.be/epLNP
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
www.usgs.gov/landsat-miss...
Because of everything that has been going on... this really hits deeper than it should.
Because of everything that has been going on... this really hits deeper than it should.
A Final Farewell to Landsat 7
The Landsat 7 satellite will receive its final transmission from the U.S. Geological Survey (USGS) on June 4, 2025, at 1:08 PM CST. The satellite launched in April 1999 and will be decommissioned afte...
www.usgs.gov
June 6, 2025 at 12:01 AM
www.usgs.gov/landsat-miss...
Because of everything that has been going on... this really hits deeper than it should.
Because of everything that has been going on... this really hits deeper than it should.
Reposted by Sami Rifai
Come work with us @AmazonFACE! We have 4 postdoc positions open:
1) Wood Traits and Growth Relationships
2) Impacts on Biogeochemical Cycling
3) Vegetation Modelling – hydrological/hydraulic processes
4) Functional Traits related to Photosynthesis
More info: amazonface.unicamp.br/oportunidade...
1) Wood Traits and Growth Relationships
2) Impacts on Biogeochemical Cycling
3) Vegetation Modelling – hydrological/hydraulic processes
4) Functional Traits related to Photosynthesis
More info: amazonface.unicamp.br/oportunidade...
Oportunidades - AmazonFACE
O AmazonFACE está com quatro vagas de pós-doutorado disponíveis. Veja abaixo mais informações
amazonface.unicamp.br
April 14, 2025 at 1:14 PM
Come work with us @AmazonFACE! We have 4 postdoc positions open:
1) Wood Traits and Growth Relationships
2) Impacts on Biogeochemical Cycling
3) Vegetation Modelling – hydrological/hydraulic processes
4) Functional Traits related to Photosynthesis
More info: amazonface.unicamp.br/oportunidade...
1) Wood Traits and Growth Relationships
2) Impacts on Biogeochemical Cycling
3) Vegetation Modelling – hydrological/hydraulic processes
4) Functional Traits related to Photosynthesis
More info: amazonface.unicamp.br/oportunidade...
Reposted by Sami Rifai
Job Opportunity: Lecturer in Ecology and Global Change at University of Leeds.
We welcome dynamic applicants from across the world to join our team of tropical ecology and global change scientists.
jobs.leeds.ac.uk/Vacancy.aspx...
We welcome dynamic applicants from across the world to join our team of tropical ecology and global change scientists.
jobs.leeds.ac.uk/Vacancy.aspx...
May 16, 2025 at 8:04 AM
Job Opportunity: Lecturer in Ecology and Global Change at University of Leeds.
We welcome dynamic applicants from across the world to join our team of tropical ecology and global change scientists.
jobs.leeds.ac.uk/Vacancy.aspx...
We welcome dynamic applicants from across the world to join our team of tropical ecology and global change scientists.
jobs.leeds.ac.uk/Vacancy.aspx...
Reposted by Sami Rifai
🚨Report your NSF grant terminations! 🚨
We are starting to collect information on NSF grant terminations to create a shared resource as we have for NIH. The more information we collect, the more we can organize, advocate, and fight back! Please share widely!
airtable.com/appGKlSVeXni...
We are starting to collect information on NSF grant terminations to create a shared resource as we have for NIH. The more information we collect, the more we can organize, advocate, and fight back! Please share widely!
airtable.com/appGKlSVeXni...
April 19, 2025 at 12:11 AM
🚨Report your NSF grant terminations! 🚨
We are starting to collect information on NSF grant terminations to create a shared resource as we have for NIH. The more information we collect, the more we can organize, advocate, and fight back! Please share widely!
airtable.com/appGKlSVeXni...
We are starting to collect information on NSF grant terminations to create a shared resource as we have for NIH. The more information we collect, the more we can organize, advocate, and fight back! Please share widely!
airtable.com/appGKlSVeXni...
Reposted by Sami Rifai
🧪 Tip: You have the right to contest a grant termination, even though NSF says you don't. 🧵
On Friday, NSF terminated 402 grants (per Musk's DOGE).
The notification letters had one of the most egregious violations of fed regulations I've seen so far in these cases:
"not subject to appeal"
On Friday, NSF terminated 402 grants (per Musk's DOGE).
The notification letters had one of the most egregious violations of fed regulations I've seen so far in these cases:
"not subject to appeal"
Here's a copy of an NSF grant termination notice that went out today. "NSF is issuing this termination to protect the interests of the government pursuant...on the basis that they no longer effectuate the program goals or agency priorities." Not subject to appeal. #HigherEd #AcademicSky
![Text of email: Dear [redacted],
The U.S. National Science Foundation (NSF) has undertaken a review of its award portfolio. Each award was carefully and individually reviewed, and the agency has determined that termination of certain awards is necessary because they are not in alignment with current NSF priorities. Effective immediately, the following are terminated: [redacted]
NSF is issuing this termination to protect the interests of the government pursuant to NSF Grant General Conditions (GC-1) term and condition entitled Termination and Enforcement; on the basis that they no longer effectuate the program goals or agency priorities. This is the final agency decision and not subject to appeal. Costs incurred as a result of this termination may be reimbursed, provided such costs would otherwise be allowable under the terms of the award and the governing cost principles. In accordance with your award terms and conditions, you have 30 days from the termination date to furnish a summary of progress under the award and an itemized accounting of allowable costs incurred prior to the termination date.
Sincerely, [redacted] Division Director
Office of Budget Finance and Award Management (BFA)
Division of Grants and Agreements (DGA)](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:l3jbgdl7a5rtsfyrgjw7spkz/bafkreif3rmsl6htpibxg3loqsuazljaekd636abaavvfm4nkjplr5e6itu@jpeg)
April 20, 2025 at 4:33 PM
🧪 Tip: You have the right to contest a grant termination, even though NSF says you don't. 🧵
On Friday, NSF terminated 402 grants (per Musk's DOGE).
The notification letters had one of the most egregious violations of fed regulations I've seen so far in these cases:
"not subject to appeal"
On Friday, NSF terminated 402 grants (per Musk's DOGE).
The notification letters had one of the most egregious violations of fed regulations I've seen so far in these cases:
"not subject to appeal"
Reposted by Sami Rifai
This directly affects land-grant universities and their stakeholders as well. UF’s Department of Wildlife Ecology and Conservation be wrecked if we lost our Co-op Unit.
All wildlife research at USGS will be eliminated. All research and science centers. All coop units. BBS, BBL…. gone.
www.science.org/content/arti...
www.science.org/content/arti...
Trump swings budget ax at USGS biology research
Plan to eliminate $307 million ecosystem program could face obstacles in Congress
www.science.org
April 19, 2025 at 4:37 PM
This directly affects land-grant universities and their stakeholders as well. UF’s Department of Wildlife Ecology and Conservation be wrecked if we lost our Co-op Unit.
Reposted by Sami Rifai
Here is an article and a list of NOAA datasets expected to end and be unavailable in the next few weeks. Please make sure you get in and download what you need!!
eos.org/research-and...
eos.org/research-and...
NOAA Datasets Will Soon Disappear - Eos
NOAA has quietly reported that they will soon decommission 14 datasets, products, and catalogs related to earthquakes and marine, coastal, and estuary science.
eos.org
April 18, 2025 at 2:30 AM
Here is an article and a list of NOAA datasets expected to end and be unavailable in the next few weeks. Please make sure you get in and download what you need!!
eos.org/research-and...
eos.org/research-and...
Reposted by Sami Rifai
INPA procura candidato(a) para pós-doutorado no Projeto “Integrando a hidrologia do solo e características hidráulicas para entender os riscos de mortalidade às secas das árvores gigantes” com o projeto “GIGANTE” (www.caryinstitute.org/science/rese...).
@treeco-db.bsky.social @evangora.bsky.social
@treeco-db.bsky.social @evangora.bsky.social
March 31, 2025 at 10:27 AM
INPA procura candidato(a) para pós-doutorado no Projeto “Integrando a hidrologia do solo e características hidráulicas para entender os riscos de mortalidade às secas das árvores gigantes” com o projeto “GIGANTE” (www.caryinstitute.org/science/rese...).
@treeco-db.bsky.social @evangora.bsky.social
@treeco-db.bsky.social @evangora.bsky.social
Reposted by Sami Rifai
In our new paper in @science.org, we show that tropical forests are changing over time, but too slowly to track climate change. Our article, led by @jeaggu.bsky.social just out:
www.science.org/doi/10.1126/...
@oxfordgeography.bsky.social
@naturerecovery.bsky.social
@forestplots.bsky.social
www.science.org/doi/10.1126/...
@oxfordgeography.bsky.social
@naturerecovery.bsky.social
@forestplots.bsky.social
Tropical forests in the Americas are changing too slowly to track climate change
Understanding the capacity of forests to adapt to climate change is of pivotal importance for conservation science, yet this is still widely unknown. This knowledge gap is particularly acute in high-b...
www.science.org
March 7, 2025 at 7:56 AM
In our new paper in @science.org, we show that tropical forests are changing over time, but too slowly to track climate change. Our article, led by @jeaggu.bsky.social just out:
www.science.org/doi/10.1126/...
@oxfordgeography.bsky.social
@naturerecovery.bsky.social
@forestplots.bsky.social
www.science.org/doi/10.1126/...
@oxfordgeography.bsky.social
@naturerecovery.bsky.social
@forestplots.bsky.social
March 6, 2025 at 10:53 PM
Reposted by Sami Rifai
Are tropical forests in the Americas changing as adaptation to ongoing climate change? Yes, they are!
Are these changes enough to track their suitable climate?
Not quite! Check out our paper in @science.org www.science.org/doi/10.1126/... to see more of what our network has been working on!
Are these changes enough to track their suitable climate?
Not quite! Check out our paper in @science.org www.science.org/doi/10.1126/... to see more of what our network has been working on!
Tropical forests in the Americas are changing too slowly to track climate change
Understanding the capacity of forests to adapt to climate change is of pivotal importance for conservation science, yet this is still widely unknown. This knowledge gap is particularly acute in high-b...
www.science.org
March 6, 2025 at 9:10 PM
Are tropical forests in the Americas changing as adaptation to ongoing climate change? Yes, they are!
Are these changes enough to track their suitable climate?
Not quite! Check out our paper in @science.org www.science.org/doi/10.1126/... to see more of what our network has been working on!
Are these changes enough to track their suitable climate?
Not quite! Check out our paper in @science.org www.science.org/doi/10.1126/... to see more of what our network has been working on!
Join us in sunny South Australia! Postdoc position in my group at the University of Adelaide to use UAV LiDAR and remote sensing to examine forest recovery and responses to weather extremes: careers.adelaide.edu.au/cw/en/job/51...
Come and celebrate our 150th year. Explore our events, our history, and the foundation we’ve built for the future.
careers.adelaide.edu.au
January 15, 2025 at 1:30 AM
Join us in sunny South Australia! Postdoc position in my group at the University of Adelaide to use UAV LiDAR and remote sensing to examine forest recovery and responses to weather extremes: careers.adelaide.edu.au/cw/en/job/51...
Reposted by Sami Rifai
Post-doc opportunity in Oxdord for those with a background in Ecology and remote sensing:
my.corehr.com/pls/coreport...
my.corehr.com/pls/coreport...
Job Details
my.corehr.com
December 28, 2024 at 1:06 PM
Post-doc opportunity in Oxdord for those with a background in Ecology and remote sensing:
my.corehr.com/pls/coreport...
my.corehr.com/pls/coreport...
Reposted by Sami Rifai
📢 18-month postdoc in my lab doing drought modelling with either the UK land surface model JULES or machine learning. Up to you which. Please share widely (thanks)
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
December 11, 2024 at 10:31 AM
📢 18-month postdoc in my lab doing drought modelling with either the UK land surface model JULES or machine learning. Up to you which. Please share widely (thanks)
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
Using remote sensing to study climate impacts on vegetation? Consider submitting an abstract to "CCS.18: Monitoring Climate Change Impacts on Vegetation"
2025 IEEE International Geoscience and Remote Sensing Symposium is coming to Brisbane, Australia Aug 3-8
Submission due by 10 January 2025!
2025 IEEE International Geoscience and Remote Sensing Symposium is coming to Brisbane, Australia Aug 3-8
Submission due by 10 January 2025!
November 29, 2024 at 5:10 AM
Using remote sensing to study climate impacts on vegetation? Consider submitting an abstract to "CCS.18: Monitoring Climate Change Impacts on Vegetation"
2025 IEEE International Geoscience and Remote Sensing Symposium is coming to Brisbane, Australia Aug 3-8
Submission due by 10 January 2025!
2025 IEEE International Geoscience and Remote Sensing Symposium is coming to Brisbane, Australia Aug 3-8
Submission due by 10 January 2025!
Interested in using remote sensing to study forest recovery following fire?
Well have I got the postdoc advert for you! careers.adelaide.edu.au/cw/en/job/51...
Apply by Nov 21. Two year position based here in Adelaide, South Australia.
Well have I got the postdoc advert for you! careers.adelaide.edu.au/cw/en/job/51...
Apply by Nov 21. Two year position based here in Adelaide, South Australia.
Come and celebrate our 150th year. Explore our events, our history, and the foundation we’ve built for the future.
careers.adelaide.edu.au
November 11, 2024 at 3:49 AM
Interested in using remote sensing to study forest recovery following fire?
Well have I got the postdoc advert for you! careers.adelaide.edu.au/cw/en/job/51...
Apply by Nov 21. Two year position based here in Adelaide, South Australia.
Well have I got the postdoc advert for you! careers.adelaide.edu.au/cw/en/job/51...
Apply by Nov 21. Two year position based here in Adelaide, South Australia.
Reposted by Sami Rifai
I'd love to connect with anyone working in satellite remote sensing/earth observation! 🛰️🌏
I've started a list of everyone I've found so far - please let me know if you're missing from the list, or if there's anyone else I should add!
go.bsky.app/4PMRhNL
I've started a list of everyone I've found so far - please let me know if you're missing from the list, or if there's anyone else I should add!
go.bsky.app/4PMRhNL
October 20, 2024 at 2:28 AM
I'd love to connect with anyone working in satellite remote sensing/earth observation! 🛰️🌏
I've started a list of everyone I've found so far - please let me know if you're missing from the list, or if there's anyone else I should add!
go.bsky.app/4PMRhNL
I've started a list of everyone I've found so far - please let me know if you're missing from the list, or if there's anyone else I should add!
go.bsky.app/4PMRhNL
Reposted by Sami Rifai
This rather fantastic recent piece is a great illustration of the value of code review, as well as sensitivity analyses. doi.org/10.1038/s414...
But I think it is particularly instructive as commentary on our scientific process today. 🧵
But I think it is particularly instructive as commentary on our scientific process today. 🧵
Mathematical biases in the calculation of the Living Planet Index lead to overestimation of vertebrate population decline - Nature Communications
The Living Planet Index is a widely used metric to measure the global population trends of vertebrates. This in-depth analysis of the methodology underlying the index reveals fundamental issues and id...
doi.org
June 26, 2024 at 2:14 AM
This rather fantastic recent piece is a great illustration of the value of code review, as well as sensitivity analyses. doi.org/10.1038/s414...
But I think it is particularly instructive as commentary on our scientific process today. 🧵
But I think it is particularly instructive as commentary on our scientific process today. 🧵