Results 51 to 60 of about 1,272 (178)

The Role of Lightning in Atmospheric Chemistry

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Lightning has important effects on atmospheric constituents in primarily the middle and upper troposphere. We summarize the effects of lightning on atmospheric chemistry that have been published since the last major review in 2007. The estimates of NOx production by lightning (LNOx) are based on five methods: theoretical/laboratory estimates ...
Kenneth E. Pickering, Dale J. Allen, Heidi Huntrieser   +2 more
wiley   +1 more source

A COMPARISON OF SINGLE PHOTON AND FULL WAVEFORM LIDAR [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Single photon sensitive LiDAR sensors are currently competing with conventional multi-photon laser scanning systems. The advantage of the prior is the potentially higher area coverage performance, which comes at the price of an increased outlier rate and
G. Mandlburger, G. Mandlburger, H. Lehner, N. Pfeifer   +3 more
doaj   +1 more source

First Assessment of ICESat‐2 Summer Sea Ice Freeboard With Airborne Validation

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract ICESat‐2 has demonstrated solid performance in retrieving sea ice freeboard during winter, when sea ice surface types are well‐defined and leads provide reliable sea surface height references. Summer retrievals are challenging because melt ponds are not explicitly distinguished in the ATL07 surface classification and may be identified as ice ...
Ellen M. Buckley, Sahra Kacimi, Melinda Webster, Siddarth Harrison, Kutalmis Saylam, Nathan T. Kurtz, Rachel L. Tilling   +6 more
wiley   +1 more source

ASSESSMENT OF BOTTOM-OF-ATMOSPHERE REFLECTANCE IN LIDAR DATA AS REFERENCE FOR HYPERSPECTRAL IMAGERY [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
While airborne lidar has confirmed its leading role in delivering high-resolution 3D topographic information during the last decade, its radiometric potential has not yet been fully exploited.
A. Roncat, N. Pfeifer, C. Briese
doaj   +1 more source

Predicting Electrically Generated Hydrogen Oxides From Ultraviolet Radiation Emissions

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract Electrical discharges such as lightning and corona discharges generate extreme amounts of hydroxyl radical (OH), the atmosphere's most important oxidizer, enough for electrical discharges to be a globally significant source of OH. However, there are few field measurements of electrically generated OH (LOH), hindering attempts to better ...
J. M. Jenkins, W. H. Brune
wiley   +1 more source

Full-waveform Small-footprint LiDAR Multi-target Echo Waveform Lightweight Detection by Spatio-temporal Coupling Models

Leida xuebao
Small-footprint full-waveform Light Detection And Ranging (LiDAR) exhibits significant application potential owing to its high penetration capability and ability to capture complete echo data.
Zhen XIAO, Yanfeng GU, Yanze JIANG, Xian LI   +3 more
doaj   +1 more source

Tree Species Detection Accuracies Using Discrete Point Lidar and Airborne Waveform Lidar

Remote Sensing, 2012
Species information is a key component of any forest inventory. However, when performing forest inventory from aerial scanning Lidar data, species classification can be very difficult.
Eric C. Turnblom, L. Monika Moskal, Nicholas R. Vaughn   +2 more
doaj   +1 more source

A primer on forest structure measurement with lidar for ecologists

Ecosphere, Volume 17, Issue 8, August 2026.
Abstract Light detection and ranging (lidar) technology has fundamentally advanced the way we measure forest structure, facilitating new insights into ecological processes. Lidar for forest ecology applications is deployed on multiple types of platforms that operate from the ground, air, or space, and each has associated strengths and limitations ...
K. C. Cushman, Kamil Král, Angelica M. Almeyda Zambrano, Eben N. Broadbent, Martin Krůček, Alice Rosen, Sean M. McMahon   +6 more
wiley   +1 more source

Flood‐Scale Bedload Transport Dynamics From Acoustic Monitoring Compared With 2D Hydro‐Sedimentary Modeling

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 8, August 2026.
Abstract Accurate estimation of bedload fluxes is critical to understanding sediment transport processes and associated channel evolution in gravel‐bed rivers, however, traditional direct measurements using samplers are time‐consuming and complex. To overcome these limitations, new indirect methods have been developed to estimate fluxes from bedload ...
G. Piasny, P.‐A. Garambois, T. Geay, S. Zanker, L. Schmitt   +4 more
wiley   +1 more source

Formation process of the gravel‐dominated deposit from the 2011 Tohoku‐oki tsunami in Ofunato, northeastern Japan, inferred by integrating sedimentology and tsunami modelling

Sedimentology, Volume 73, Issue 5, Page 1378-1402, August 2026.
ABSTRACT Tsunami deposits serve as geological records of past events and are essential for understanding the occurrence and dynamics of tsunamis. However, conventional research has largely focused on sandy and boulder deposits, leaving gravel‐dominated tsunami deposits comparatively underexplored; furthermore, their characteristics and formation ...
Hidetoshi Masuda, Haruki Imura, Koki Nakata, Takashi Ishizawa, Daisuke Sugawara, Kazuhisa Goto   +5 more
wiley   +1 more source