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Atticus Stovall

@stovallatticus.bsky.social

🌳 #Forest #ecology🌲 | #lidar lover | 🌎 @NASAGoddard | @thenasaearth | @univofmaryland | Opinions my own

25 Posts448 Follower388 Folgt
David Ho@davidho.bsky.social · 2y ago

We got a message from the university to remove any use of the "DEI", "diversity", "equity", or "inclusion" from all public-facing documents. They said that even "biodiversity" is being flagged by the federal government. We live in the dumbest timeline.

Atticus Stovall@stovallatticus.bsky.social · 2y ago

Coming back from a week of laser scanning fieldwork where I originally worked on my PhD and it was surreal. I've not been back for 10 years and, while some areas of the forest seemed almost frozen in time - others are experiencing massive dieback. A decade provides a lot of perspective.

Laser scanner in the forest at sunset
Atticus Stovall@stovallatticus.bsky.social · 2y ago

🚨 ‼️ NEW PAPER ALERT ‼️ 🚨 So honored to be included in this amazing effort led by Zoe Pierrat et al on proximal remote sensing. 👏👏👏 This work synthesizes loads of great info across the board - with keys discussions on synergies and a path forward for global proximal sensing networks!

Troy Magney@troymagney.bsky.social · 2y ago

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.
Atticus Stovall@stovallatticus.bsky.social · 2y ago

🎉 New Paper Day! 🎉 A great collaboration between the GEDI team and DLR led by Wenlu Qi! Integrating GEDI + TanDEM-X for pantropical mapping of canopy height, paving the way for better biomass maps. www.sciencedirect.com/science/arti...

Mapping large-scale pantropical forest canopy height by integrating GEDI lidar and TanDEM-X InSAR data

NASA's Global Ecosystem Dynamic Investigation (GEDI) mission provides billions of lidar samples of canopy structure over the Earth's temperate and pan…

sciencedirect.com

Brent Toderian@brenttoderian.bsky.social · 2y ago

Don’t forget Valencia, Spain. Don’t forget those who insisted that actions needed to avoid the #ClimateCrisis were “too expensive.” Don’t forget all the record-breaking, historic or “100 year” events we’ve seen lately. They’re not the “new normal. It’s going to keep getting exponentially worse.

A Valencia street filled with crumpled and piled cars left behind after the record-breaking flooding.