Results 61 to 70 of about 941 (199)

Dumpsite Seabed Characterization of the San Pedro Basin, CA, From Autonomous Vehicle Observations

Journal of Field Robotics, EarlyView.
ABSTRACT A wide‐area seabed survey was conducted using autonomous underwater vehicles (AUVs) in a known dumpsite off the coast of Southern California that has been found to have widespread sediment contamination from the chemical dichlorodiphenyltrichloroethane (DDT).
Ryan A. McCarthy, Dylan Kriegman, Sophia T. Merrifield, Heidi Batchelor, Eric J. Terrill   +4 more
wiley   +1 more source

Development of wavelength locking circuit for 1.53 micron water vapor monitoring coherent differential absorption LIDAR

EPJ Web of Conferences, 2018
We have studied a ground based coherent differential absorption LIDAR (DIAL) for vertical profiling of water vapor density using a 1.5μm laser wavelength. A coherent LIDAR has an advantage in daytime measurement compared with incoherent LIDAR because the
Imaki Masaharu, Kojima Ryota, Kameyama Shumpei   +2 more
doaj   +1 more source

Feasibility Study of Multi-Wavelength Differential Absorption LIDAR for CO2 Monitoring

Atmosphere, 2016
To obtain a better understanding of carbon cycle and accurate climate prediction models, highly accurate and temporal resolution observation of atmospheric CO2 is necessary. Differential absorption LIDAR (DIAL) remote sensing is a promising technology to
Chengzhi Xiang, Xin Ma, Ailin Liang, Ge Han, Wei Gong, Fa Yan   +5 more
doaj   +1 more source

Mapping Scytonemin Pigment Content and Biocrust Functional Indicators Using High‐Resolution Multispectral Imagery

Remote Sensing in Ecology and Conservation, EarlyView.
We demonstrate that high‐resolution multispectral imagery combined with machine learning can accurately predict key biocrust functional indicators, particularly the UV‐protective pigment scytonemin, across dryland ecosystems. Using fine‐scale imagery acquired in the Chihuahuan Desert and Colorado Plateau, we identified spectral bands strongly ...
Raúl Román, Tong Qiu, Fernando T. Maestre, Elizabeth A. La Rue, Sergio Vargas Zesati, Anthony Schaefer, Ryan V. Trexler, Nicole Pietrasiak, Estelle Couradeau   +8 more
wiley   +1 more source

δ 13C carbon isotopic composition of CO2 in the atmosphere by Lidar [PDF]

EPJ Web of Conferences
A differential absorption lidar (DIAL) has been developed at LMD to measure the variation of stable isotopic composition of CO2, δ 13C, in the atmosphere.
Gibert Fabien, Edouart Dimitri, Cénac Claire   +2 more
doaj   +1 more source

Using Airborne Laser Scanning and Sentinel‐2 to Understand Subcanopy Light Regimes and Understory Diversity of Vascular Plants in Temperate Mountain Forests

Remote Sensing in Ecology and Conservation, EarlyView.
This study demonstrates that not just Airborne Laser Scanning, but also Sentinel‐2 can effectively estimate absolute canopy cover and canopy cover heterogeneity ‐ structural metrics that determine the subcanopy light regime, found to be linked to the vascular plant species richness in the understory of temperate mountain forests.
Felix Wieland‐Glasmann, Cornelius Senf, Kristin H. Braziunas, Rupert Seidl, Peter Annighöfer   +4 more
wiley   +1 more source

Comparative Assessment of Methane Emissions from Onshore LNG Facilities Measured Using Differential Absorption Lidar. [PDF]

Environ Sci Technol, 2023
Innocenti F, Robinson R, Gardiner T, Howes N, Yarrow N.   +4 more
europepmc   +1 more source

Underwater imaging without colour distortions requires RAW capture

Methods in Ecology and Evolution, EarlyView.
Abstract Consumer cameras are not designed to be scientific instruments, yet they are increasingly used in science not just to see, but to measure. This is possible because camera sensors respond approximately linearly to the light they receive, a property that can, in principle, support quantitative measurements of colour.
Derya Akkaynak, Michael S. Brown
wiley   +1 more source

Ozone Measurements Using the Refurbished Eureka Stratospheric Differential Absorption Lidar

Canadian Journal of Remote Sensing, 2019
The Stratospheric Ozone Differential Absorption Lidar (DIAL) located at the Polar Environment Atmospheric Research Laboratory (PEARL) in Eureka, Nunavut (80°N, 86°W) has been a powerful tool for the measurement of stratospheric ozone vertical profiles in
Alexey B. Tikhomirov, Ghazal Farhani, Emily M. McCullough, Robert J. Sica, Pierre F. Fogal, Thierry Leblanc, James R. Drummond   +6 more
doaj   +1 more source

Human Recreation and Fire History Shape Landscape Connectivity for an Endangered Forest Carnivore

Animal Conservation, EarlyView.
Roads and trails can impede wildlife movement, but their permeability varies with human use and fire history. We combined GPS telemetry from 45 endangered southern Sierra Nevada fishers (Pekania pennanti) with smartphone‐derived human mobility data to estimate crossing probability across road and trail segments. Fishers were about 2.5 times more likely
Mark A. Ditmer, Maksim Sergeyev, Helen E. Chmura, Jody M. Tucker, Gavin M. Jones, Kari E. Norman, Ronan B. Hart, Michael K. Schwartz, Andria M. Townsend, Rebecca E. Green, Sarah L. Stock, George Wittemyer   +11 more
wiley   +1 more source