Results 71 to 80 of about 12,499 (195)

BRDFs acquired by directional radiative measurements during EAGLE and AGRISAR [PDF]

, 2008
Radiation is the driving force for all processes and interactions between earth surface and atmosphere. The amount of measured radiation reflected by vegetation depends on its structure, the viewing angle and the solar angle. This angular dependence is
Jia, L., Su, Z., Timmermans, J., Tol, C van der, Vekerdy, Zoltán, Weligepolage, K.   +5 more
core  

Projective Displacement Mapping for Ray Traced Editable Surfaces

Computer Graphics Forum, Volume 44, Issue 7, October 2025.
Abstract Displacement mapping is an important tool for modeling detailed geometric features. We explore the problem of authoring complex surfaces while ray tracing interactively. Current techniques for ray tracing displaced surfaces rely on acceleration structures that require dynamic rebuilding when edited.
Rama Hoetzlein
wiley   +1 more source

Modification and Comparison of Two Urban Vegetation Models Over Southern Ontario, Canada

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 9, September 2025.
Abstract Despite significant emissions of anthropogenic carbon dioxide (CO2 ${\text{CO}}_{2}$) in cities, fluxes of CO2 ${\text{CO}}_{2}$ to and from urban ecosystems can significantly impact local carbon budgets. In this work, we use the city of Toronto, Canada, as a testbed to compare two urban vegetation models: the Solar‐induced chlorophyll ...
Sabrina Madsen‐Colford, Lucy Hutyra, Ian Smith, Dien Wu, M. Altaf Arain, Ralf Staebler, William Ma, Natalia Restrepo‐Coupe, Debra Wunch   +8 more
wiley   +1 more source

Active Amplification of the Terrestrial Albedo to Mitigate Climate Change: An Exploratory Study

, 2005
This study explores the potential to enhance the reflectance of solar insolation by the human settlement and grassland components of the Earth's terrestrial surface as a climate change mitigation measure.
A. Henderson-Sellers, A. Henderson-Sellers, A.K. Knapp, ASTM, B. Govindasamy, B.P. Flannery, B.R. Bondada, C. Justice, C.B. Schaaf, C.D. Keeling, CIESIN (Center for International Earth Science Information Network), D. Balk, D.A. Sims, D.J. Hofmann, D.L. Hartmann, D.W. Keith, D.W. Keith, G. Myhre, G.B. Bonan, G.B. Bonan, G.B. Bonan, G.B. Bonan, G.P. Asner, G.P. Asner, HARC (Houston Advanced Research Center), J. Charney, J.E. Hansen, L.S. Rose, M. Apps, M. Jin, NAS (National Academy of Sciences), P.A. Dirmeyer, P.W. Stackhouse, R. Armstrong, R.A. Betts, R.H. Grant, R.M. Sud, R.N. Clark, R.S. DeFries, Robert M. Hamwey, S. Liang, St. Sandmeier, T.R. Loveland, V. Ramaswamy, Y Tian, Y. Dai, Y. Xue   +46 more
core   +2 more sources

Fluorescence Efficiency‐Derived Physiological Optimal Temperature Improving the Estimation of Photosynthesis

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract Terrestrial gross primary production (GPP) quantifies the rate of CO2 fixation in ecosystems through photosynthesis. The optimal temperature (Topt) is one of fundamental determinants in the vegetation photosynthesis model (VPM) model that constrains the temperature response of light use efficiency (LUE) under changing environmental conditions.
Zhaoying Zhang, Yongguang Zhang
wiley   +1 more source

Comprehensive Analysis of Bias in TEMPO NO2 Column Densities Through Pandora Observations

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 15, 16 August 2025.
Abstract Tropospheric Emissions: Monitoring of Pollution (TEMPO) is the first geostationary satellite instrument to monitor air pollutants across North America. This study uses Pandora observations to analyze the bias in TEMPO Level‐3 total column density of NO2 (TOTNO2) from August 2023 to December 2024.
Masoud Ghahremanloo, Caroline Nowlan, Gonzalo González Abad, Cecilia Garraffo, Xiong Liu, Huiqun Wang, Barron Henderson, Eric Baumann, Lukas Valin, Jeffrey A. Geddes, Xiaoyi Zhao   +10 more
wiley   +1 more source

Methodology and Modeling of UAV Push-Broom Hyperspectral BRDF Observation Considering Illumination Correction

Remote Sensing
The Bidirectional Reflectance Distribution Function (BRDF) is a critical spatial distribution parameter in the quantitative research of remote sensing and has a wide range of applications in radiometric correction, elemental inversion, and surface ...
Zhuo Wang, Haiwei Li, Shuang Wang, Liyao Song, Junyu Chen   +4 more
doaj   +1 more source

An Algorithm for Retrieval of Surface Albedo From Small View-Angle Airborne Observations Through the Use of BRDF Archetypes as Prior Knowledge

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015
Land surface albedo, qualifying the ratio of the radiant flux reflected from the land surface to the incident flux, is a key forcing parameter controlling the Earth's energy budget.
Ziti Jiao, Hu Zhang, Yadong Dong, Qiang Liu, Qing Xiao, Xiaowen Li   +5 more
doaj   +1 more source

Alpine greening deciphered by forest stand and structure dynamics in advancing treelines of the southwestern European Alps

Remote Sensing in Ecology and Conservation, Volume 11, Issue 4, Page 375-393, August 2025.
Multidecadal satellite observations, like those from Landsat, enable the study of vegetation greenness trends at extensive spatial and temporal scales. Alpine ecosystems show significant increases in vegetation greenness, but the ecological processes driving this greening are less understood.
Arthur Bayle, Baptiste Nicoud, Jérôme Mansons, Loïc Francon, Christophe Corona, Philippe Choler   +5 more
wiley   +1 more source

Comparisons of the v11.1 Orbiting Carbon Observatory‐2 (OCO‐2) XCO2 Measurements With GGG2020 TCCON

Earth and Space Science, Volume 12, Issue 7, July 2025.
Abstract The Orbiting Carbon Observatory 2 (OCO‐2) is NASA's first Earth observation satellite mission dedicated to studying the sources and sinks of carbon dioxide (CO2) on a global scale. The observations of reflected sunlight are inverted in a retrieval algorithm to produce estimates of the dry air mole‐fractions of CO2 (XCO2).
Saswati Das, Matthäus Kiel, Joshua Laughner, Gregory Osterman, Christopher W. O’Dell, Thomas E. Taylor, Brendan Fisher, Frédéric Chevallier, Nicholas M. Deutscher, Manvendra K. Dubey, Dietrich G. Feist, Omaira Garcia, David W. T. Griffith, Frank Hase, Laura T. Iraci, Rigel Kivi, Isamu Morino, Justus Notholt, Hirofumi Ohyama, David Pollard, Sébastien Roche, Coleen M. Roehl, Constantina Rousogenous, Mahesh Kumar Sha, Kei Shiomi, Kimberly Strong, Ralf Sussmann, Yao Té, Geoffrey Toon, Mihalis Vrekoussis, Pucai Wang, Thorsten Warneke, Paul Wennberg, Abhishek Chatterjee, Vivienne H. Payne, Debra Wunch   +35 more
wiley   +1 more source