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Jonas Alsleben

@jalsleben.bsky.social
128 followers 201 following 4 posts

Geographer combining remote sensing and field data to disentangle the impacts of land use and climate on biodiversity and earth surface processes 🌏🛰️🌳⛰️🌱🗺️ Doctoral Researcher @humboldteolab.bsky.social, @humboldtuni.bsky.social he/him

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Reposted by Jonas Alsleben
Earth Observation Lab @humboldteolab.bsky.social · 16/07/2026
A new study by @jalsleben.bsky.social et al. introduces a national approach to map tree dieback across Germany using Sentinel-2 time series. Instead of just measuring greenness, it directly quantifies non-photosynthetic vegetation at a sub-pixel scale. Let's have a closer look ⬇️
Infographic announcing a new scientific publication titled "Mapping tree dieback using Sentinel-2 time series and generalized regression-based unmixing models reveals species-specific patterns across Germany" by Jonas Alsleben et al., published in the journal "Remote Sensing of Environment".

The top portion features a multi-panel graphic visualizing the progression of spruce dieback from 2019 to 2022 using Sentinel-2 satellite data. Color-coded from light beige (0% dieback fraction) to dark red (100% dieback fraction), it shows the spatial expansion of forest mortality in a selected area over time, paired with 2024 aerial imagery for validation. Earth Observation Lab Logo is shown in the bottom right corner.
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Earth Observation Lab @humboldteolab.bsky.social · 04/06/2026
EARSeL VP Jean-Christophe Schyns congratulates @lasseharkort.bsky.social for winning the Young Scientist Award at the Imaging Spectroscopy SIG. Lasse's presentation "Capturing the Pulse of the Dry Season" showed how EnMAP time series can disentangle different NPV types from space. Congrats, Lasse!
Picture with headline: "CONGRATULATIONS LASSE!" 
Picture shows Jean-Christophe Schyns, EARSeL Vice President, he congratulates Lasse Harkort on Stage for winning the Young Scientist Award at the EARSeL Special Interest Group on Imaging Spectroscopy. Lasse presented on "Capturing the Pulse of the Dry Season", where he showed how EnMAP time series allow disentangling different NPV types from space.
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Katarzyna Ewa Lewińska @kelewinska.bsky.social · 05/05/2026
🌍 After excluding clouds, shade and snow, how much #Sentinel-2 and #Landsat 🛰️ do we really have for 2025?! Continuing our mission and previous research (tinyurl.com/2kbwesbj), we added 2025 to our #GEE App tinyurl.com/322e63p2. Take advantage of this data when planning your #RemoteSensing analysis
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Earth Observation Lab @humboldteolab.bsky.social · 04/05/2026
Smallholder farming systems are notoriously difficult to map from space. Landscapes are fragmented and global maps often disagree, yet data on where farming actually happens is fundamental to designing effective land use and sustainability policies.
 A few things stood out in the data! 📊 ⬇️
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Earth Observation Lab @humboldteolab.bsky.social · 25/01/2026
The #GreenGrass 2.0 Project aims to enhance the resilience and long-term protection of grassland pasture systems in Germany with smart farming systems. Check out our new StoryMap to see how #remotesensing helps to develop these sustainable pasture management strategies ➡️ arcg.is/1LOKDC1
A scientific infographic titled "Leverage multi-decadal Landsat archive" illustrating how satellite data tracks grassland changes.
Credits: Image: Jonas Alsleben. Graphic: Alsleben, J., Jauker, F. Hostert, P. (November 07, 2025). Satellite-based grassland diversity indicators on a landscape scale (unpublished poster). AdZ Meeting Berlin.
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Earth Observation Lab @humboldteolab.bsky.social · 21/01/2026
From local fields to national scales: EOLab’s @jalsleben.bsky.social is contributing remote sensing expertise to the interdisciplinary GreenGrass 2.0 Project! 🌱🐄🛰️ Find out more about the project, research challenges, and methodological approaches in this StoryMap: arcg.is/1LOKDC1 #EarthObservation
A research graphic titled "From local to national scale: Earth Observation of semi-natural grasslands within the GreenGrass 2.0 project network." The background shows a cow grazing in a green pasture. The right side features two technical diagrams, illustrating spectral-temporal monitoring and intra-annual time series. Credits list Katja Janson, Scientist Jonas Alsleben, and PI Patrick Hostert.
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Earth Observation Lab @humboldteolab.bsky.social · 21/07/2025
Using Remote Sensing and Agro-Ecosystem Modelling 🛰️🌽📈, Esther Shupel Ibrahim analyzes impacts of climate change and diseases on smallholder agriculture in Nigeria and develops strategies to support and empower smallholder farmers. Find out more about her PhD research in this StoryMap: arcg.is/1bG48K
Header Image of Maize field with a picture of Esther Shupel Ibrahim and text: Research for Smallholder Farmers' Food Security in Nigeria
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Philippe Rufin @philrufin.bsky.social · 17/07/2025
🌍 🛰️ 🌱 🌽👨🏿‍🌾🛖💻⚙️ Preprint on national-scale satellite-based crop field delineation in smallholder landscapes is out: doi.org/10.48550/arX... 🌍 🛰️ 🌱 🌽👨🏿‍🌾🛖💻⚙️
National-scale map of mean field size across Mozambique. Selected zoom ins provide details on individual fields.
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Earth Observation Lab @humboldteolab.bsky.social · 27/06/2025
How well can we map NPV across temperate forest heterogeneity? Can we use NPV time series to reveal tree dieback? And how does dieback vary between species in Germany? Visit @jalsleben.bsky.social to discuss these questions: 📍 X5 Poster Area 🗓️ Friday, 13:00h #LPS25 #Sentinel2 #foresthealth
Announcement for upcoming Earth Observation Lab contribution at living planet symposium 2025:
Alsleben et al.: Monitoring Species-Specific Tree Dieback across Central European Temperate Forests using Sentinel-2 Time Series
Session: A.02.04 Advances in Monitoring and Management of
Forest Ecosystems
Where: X5 - Poster Area / Zone F-J
When: Friday 27.06.25 / 13:00 h
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Earth Observation Lab @humboldteolab.bsky.social · 27/06/2025
#LPS25 wildE presentation on High resolution reconstructions of Pan-European woody cover timeseries from 1990-2024 by Shawn Schneidereit upcoming in Hall F2 at 11:30h!
Announcement for upcoming Earth Observation Lab contribution at living planet symposium 2025:
Schneidereit et al.: High resolution reconstructions of Pan-European woody cover timeseries from 1990-2024
Session: A.02.04 Advances in Monitoring and Management of
Forest Ecosystems - PART 6
Where: Hall F2
When: Friday 27.06.25 / 11:30 h
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lasseharkort.bsky.social @lasseharkort.bsky.social · 22/06/2025
Excited to present at #LPS25! 🛰️ I’ll share how Phenological Feature Spaces help map vegetation fractions in semiarid rangelands. 🔗 Paper: www.sciencedirect.com/science/arti... Make sure to check @humboldteolab.bsky.social at #LPS25 eolab.geographie.hu-berlin.de #EOchat #LPS25
LPS 2025
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Katarzyna Ewa Lewińska @kelewinska.bsky.social · 20/06/2025
📣Attending @esa.int's #LPS25 next week? Make sure to catch the 𝐂.𝟎𝟓.𝟎𝟒 session (𝐓𝐮𝐞 𝟐𝟒𝐭𝐡 | 𝟏𝟔:𝟏𝟓-𝟏𝟕:𝟒𝟓 | 𝐇𝐚𝐥𝐥 𝐋𝟏/𝐋𝟐), during which I will talk about 🌍 global 🛰️ #Landsat and #Sentinel-2 data availability and how it shapes feasibility of long-term analyses. See you in Vienna!
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Earth Observation Lab @humboldteolab.bsky.social · 16/06/2025
Grateful to Prof. Mia Bennett (@cryopolitics.com ,Univ. of Washington) for stirring questions at today’s EO Lab colloquium. “Pixel Politics” probed who owns the satellites—and the narratives—behind our data. Exposure→engagement→empowerment: roadmap for critical #RemoteSensing
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Earth Observation Lab @humboldteolab.bsky.social · 12/06/2025
Meet the EnMAP-Box at the @esa.int #LivingPlanetSymposium. Come to our tutorial on Sun 22Jun, and poster on Wed 25Jun, right after the #EnMAP Mission session (C.05.05).
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HagollEO @hagolleo.bsky.social · 12/03/2025
Starting tomorrow (13th of March)
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Mike Wulder @mikewulder.bsky.social · 12/03/2025
Observations from 3 #Sentinel2 satellites! Increased revisit frequency. Terrific news! “This configuration will enhance the availability of Sentinel-2 data, with additional Sentinel-2 observations on the same relative orbit, occurring 2 days apart from Sentinel-2B and 1 day apart from Sentinel-2C.”
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Philippe Rufin @philrufin.bsky.social · 19/02/2025
Proud to be part of a great @eoafrica-rd.org team and an exciting project! Looking forward to the collaboration Prof. Natasha Ribeiro, @hostertp.bsky.social, @lennarteichfuss.bsky.social, João Chibue Domingos & Pauline Hammer! More info here: eolab.geographie.hu-berlin.de/research_pro...
eolab.geographie.hu-berlin.de
Sen4Moz | Earth Observation Lab
Copernicus Data for Mapping Shifting Cultivation Dynamics in Conservation Areas of Mozambique.
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Jonas Alsleben @jalsleben.bsky.social · 13/02/2025
Congratulations to @lasseharkort.bsky.social for his first Phd chapter! The maps reveal impressive patterns of management-driven fragmentation and woody-herbaceous cover along a rainfall gradient.
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Earth Observation Lab @humboldteolab.bsky.social · 13/02/2025
📣PNAS piece led by @philrufin.bsky.social: commercial very-high-resolution EO data is needed for monitoring SDG 2 indicators in smallholder landscapes but costs are prohibitive. A call for open access for sustainability-centered research: doi.org/10.1073/pnas... @humboldtuni.bsky.social
A drone capture of a smallholder farming landscape. Overlaid are squares of the size of typical optical satellite missions. Openly accessible data (e.g. Landsat or Sentinel-2) is often not sufficient to capture the landscape complexity in full detail, for example when trying to delineate individual fields. Here, one Landsat pixel contains fractions of multiple fields. Commercial data come at higher spatial resolution, offering potential to discriminate indivudual landscape components.
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Philippe Rufin @philrufin.bsky.social · 12/02/2025
Commercial very-high-resolution satellite imagery is crucial for monitoring smallholder farming systems (SDG 2), but paywalls block innovation and progress. We call for open access to these data for sustainability-centered research in @pnas.org! Read the full text here: doi.org/10.1073/pnas...
Photograph of smallholder farmer presenting seeds in her hand.
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Philippe Rufin @philrufin.bsky.social · 12/02/2025
We left behind ~10k followers on X, please reskeet to help us reach the community! #EOchat
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He YIN | 殷贺 @he-yin.bsky.social · 11/02/2025
Congratulations to Esmaeel Adrah on the publication of his first paper in #RSE! 👏 🏷️ In this paper, we integrated #GEDI, #Sentinel-1, and #Sentinel-2 data to map tree crops in a Mediterranean environment. www.sciencedirect.com/science/arti...
sciencedirect.com
Integrating GEDI, Sentinel-2, and Sentinel-1 imagery for tree crops mapping
Mapping tree crops is essential for resource management and supporting local livelihoods and ecosystem services. However, tree crops are often overloo…
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Gohar Ghazaryan @ggohar.bsky.social · 06/02/2025
Productive days at @esaearth.esa.int Digital Twin Earth Open Science Meeting! We presented #EOAgriTwin, a project that uses #EO data to assess stressors & build #DigitalTwin for drought, heat, pests & pathogens. Collab: @zalf.bsky.social, RSS, @humboldtuni.bsky.social, ICIPE & UCSC. 🔗 eoagritwin.eu
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Robert Pazur @robertpazur.bsky.social · 21/01/2025
Productive discussions on G4B grassland habitat and diversity remote sensing and protection with our partners at Humboldt University today. #G4B @g4biodiv.bsky.social @wslresearch.bsky.social @biodiversaplus.bsky.social @tkuemmerle.bsky.social
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Jonas Alsleben @jalsleben.bsky.social · 13/01/2025
Happy to share our new paper on soil-specific unmixing of croplands in Germany led by Felix Lobert. We adapted @katjakowalski.bsky.social’s approach using #Landsat and #Sentinel-2 🛰️ to account for soil variability using a soil reflectance composite developed at @thuenen.de EO: tinyurl.com/5n92ae5z
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