Zobrazeno 1 - 10
of 1 241
pro vyhledávání: '"R. Kellner"'
Near-Complete Sampling of Forest Structure from High-Density Drone Lidar Demonstrated by Ray Tracing
Publikováno v:
Remote Sensing, Vol 16, Iss 15, p 2774 (2024)
Drone lidar has the potential to provide detailed measurements of vertical forest structure throughout large areas, but a systematic evaluation of unsampled forest structure in comparison to independent reference data has not been performed. Here, we
Externí odkaz:
https://doaj.org/article/382c85d711664651943416c099c5f772
Autor:
Peng Fu, Christian Clanton, Kirk M. Demuth, Verena Goodman, Lauren Griffith, Mage Khim-Young, Julia Maddalena, Kenny LaMarca, Logan A. Wright, David W. Schurman, James R. Kellner
Publikováno v:
Remote Sensing, Vol 16, Iss 12, p 2217 (2024)
Increases in organic carbon within agricultural soils are widely recognized as a “negative emission” that removes CO2 from the atmosphere. Accurate quantification of soil organic carbon (SOC) to a certain depth in the spatial domain is critical f
Externí odkaz:
https://doaj.org/article/5c9d152217e146a4b7151b910ded4099
Publikováno v:
Earth and Space Science, Vol 10, Iss 4, Pp n/a-n/a (2023)
Abstract The Global Ecosystem Dynamics Investigation (GEDI) lidar is a multibeam laser altimeter on the International Space Station (ISS). GEDI is the first spaceborne instrument designed to measure vegetation height and to quantify aboveground carbo
Externí odkaz:
https://doaj.org/article/ee9e4dfc01684baebcbefb2169730646
Autor:
K. C. Cushman, John T. Burley, Benedikt Imbach, Sassan S. Saatchi, Carlos E. Silva, Orlando Vargas, Carlo Zgraggen, James R. Kellner
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Abstract Field measurements demonstrate a carbon sink in the Amazon and Congo basins, but the cause of this sink is uncertain. One possibility is that forest landscapes are experiencing transient recovery from previous disturbance. Attributing the ca
Externí odkaz:
https://doaj.org/article/28723270b61340e780f6f1bcd7d11454
Autor:
K C Cushman, John Armston, Ralph Dubayah, Laura Duncanson, Steven Hancock, David Janík, Kamil Král, Martin Krůček, David M Minor, Hao Tang, James R Kellner
Publikováno v:
Environmental Research Letters, Vol 18, Iss 6, p 065009 (2023)
The Global Ecosystem Dynamics Investigation (GEDI) is a waveform lidar instrument on the International Space Station used to estimate aboveground biomass density (AGBD) in temperate and tropical forests. Algorithms to predict footprint AGBD from GEDI
Externí odkaz:
https://doaj.org/article/f1f0a5828b3b4a26b64c4606320b12a9
Autor:
Ralph Dubayah, John Armston, Sean P Healey, Jamis M Bruening, Paul L Patterson, James R Kellner, Laura Duncanson, Svetlana Saarela, Göran Ståhl, Zhiqiang Yang, Hao Tang, J Bryan Blair, Lola Fatoyinbo, Scott Goetz, Steven Hancock, Matthew Hansen, Michelle Hofton, George Hurtt, Scott Luthcke
Publikováno v:
Environmental Research Letters, Vol 17, Iss 9, p 095001 (2022)
Accurate estimation of aboveground forest biomass stocks is required to assess the impacts of land use changes such as deforestation and subsequent regrowth on concentrations of atmospheric CO _2 . The Global Ecosystem Dynamics Investigation (GEDI) i
Externí odkaz:
https://doaj.org/article/d9ca37056c614d88a76d90f63eea5b3e
Publikováno v:
Behaviour. 159:1319-1340
Animals vary in the complexity and size of the signal repertoire used in communication. Often, these behavioural repertoires include multiple signal types for the same process, for instance, courtship. In Enchenopa treehoppers (Hemiptera: Membracidae
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62b0bced0bedb16597fb476bebd53b8b
https://doi.org/10.1163/1568539x-bja10181
https://doi.org/10.1163/1568539x-bja10181
Autor:
David B Clark, Antonio Ferraz, Deborah A Clark, James R Kellner, Susan G Letcher, Sassan Saatchi
Publikováno v:
PLoS ONE, Vol 14, Iss 11, p e0224896 (2019)
Large trees, here defined as ≥60 cm trunk diameter, are the most massive organisms in tropical rain forest, and are important in forest structure, dynamics and carbon cycling. The status of large trees in tropical forest is unclear, with both incre
Externí odkaz:
https://doaj.org/article/a965f460519b46deb92be8bfb19f703c
Autor:
KC Cushman, John Armston, Ralph Dubayah, Laura I Duncanson, Steven Hancock, David Janík, Kamil Král, Martin Krůček, David Minor, Hao Tang, James R Kellner
Publikováno v:
Cushman, K, Armston, J, Dubayah, R, Duncanson, L I, Hancock, S, Janík, D, Král, K, Krůček, M, Minor, D, Tang, H & Kellner, J R 2023, ' Impact of leaf phenology on estimates of aboveground biomass density in a deciduous broadleaf forest from simulated Global Ecosystem Dynamics Investigation (GEDI) lidar. ', Environmental Research Letters, vol. 18, 065009 . https://doi.org/10.1088/1748-9326/acd2ec
The Global Ecosystem Dynamics Investigation (GEDI) is a waveform lidar instrument on the International Space Station used to estimate aboveground biomass density (AGBD) in temperate and tropical forests. Algorithms to predict footprint AGBD from GEDI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edeae726afea71d4d8adf21e0a9ab743
https://doi.org/10.1088/1748-9326/acd2ec
https://doi.org/10.1088/1748-9326/acd2ec
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