Document Type
Article
Publication Date
1-23-2025
Abstract
A new proliferation of optical instruments that can be attached to towers over or within ecosystems, or ‘proximal’ remote sensing, enables a comprehensive characterization of terrestrial ecosystem structure, function, and fluxes of energy, water, and carbon. Proximal remote sensing can bridge the gap between individual plants, site-level eddy-covariance fluxes, and airborne and spaceborne remote sensing by providing continuous data at a high-spatiotemporal resolution. Here, we review recent advances in proximal remote sensing for improving our mechanistic understanding of plant and ecosystem processes, model development, and validation of current and upcoming satellite missions. We provide current best practices for data availability and metadata for proximal remote sensing: spectral reflectance, solar-induced fluorescence, thermal infrared radiation, microwave backscatter, and LiDAR. Our paper outlines the steps necessary for making these data streams more widespread, accessible, interoperable, and information-rich, enabling us to address key ecological questions unanswerable from space-based observations alone and, ultimately, to demonstrate the feasibility of these technologies to address critical questions in local and global ecology.
Recommended Citation
Pierrat, Z.A., Magney, T.S., Richardson, W.P., Runkle, B.R.K., Diehl, J.L., Yang, X., Woodgate, W., Smith, W.K., Johnston, M.R., Ginting, Y.R.S., Koren, G., Albert, L.P., Kibler, C.L., Morgan, B.E., Barnes, M., Uscanga, A., Devine, C., Javadian, M., Meza, K., Julitta, T., Tagliabue, G., Dannenberg, M.P., Antala, M., Wong, C.Y.S., Santos, A.L.D., Hufkens, K., Marrs, J.K., Stovall, A.E.L., Liu, Y., Fisher, J.B., Gamon, J.A. and Cawse-Nicholson, K. (2025), Proximal remote sensing: an essential tool for bridging the gap between high-resolution ecosystem monitoring and global ecology. New Phytol. https://doi.org/10.1111/nph.20405
Notes S1 Recommended Best Practices for Proximal Remote Sensing provides guidance on instrument setup, retrievals, temporal aggregation, calibrations, metadata, and support data for spectral reflectance, solar-induced fluorescence, thermal infrared radiation, microwave, and LiDAR. Notes S2 Metadata recommendations for tower-mounted hyperspectral and SIF instruments provides example metadata formatting to facilitate the cross-compatibility of these data and reporting standards. Notes S3 Existing Publicly Available Data provides the status of proximal remote sensing data currently published following FAIR data principles. Table S1 Instrument descriptions for proximal spectral reflectance and SIF. Table S2 Instrument descriptions for proximal thermal infrared radiation. Table S3 Instrument descriptions for proximal microwave measurements. Table S4 Overview of existing publicly available proximal SIF datasets and a link to a more updated database. Table S5 Selection of available TLS datasets.
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The authors
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This work is licensed under a Creative Commons Attribution 4.0 License.

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This article was originally published in New Phytologist in 2025. https://doi.org/10.1111/nph.20405