Results 41 to 50 of about 1,690 (181)

Assessment of virtual towers performed with scanning wind lidars and Ka-band radars during the XPIA experiment [PDF]

Atmospheric Measurement Techniques, 2017
During the eXperimental Planetary boundary layer Instrumentation Assessment (XPIA) campaign, which was carried out at the Boulder Atmospheric Observatory (BAO) in spring 2015, multiple-Doppler scanning strategies were carried out with scanning wind ...
M. Debnath, G. V. Iungo, W. A. Brewer, A. Choukulkar, R. Delgado, S. Gunter, J. K. Lundquist, J. L. Schroeder, J. M. Wilczak, D. Wolfe   +9 more
doaj   +1 more source

River Sand and Gravel Mining: Global Drivers, Impacts, and Pathways for Sustainable Management

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract River sand and gravel are mined worldwide at volumes that now rival their natural replenishment, yet quantitative knowledge of this mining activity and its consequences lags far behind many other global environmental pressures. We synthesize 411 peer‐reviewed studies published since 1974 within a new Driver‐to‐Management Pathway for ...
Edward Park, Christopher R. Hackney, Dung Duc Tran, Mette Bendixen, Jim Best, Kai Wan Yuen, Hannah Runeckles, Md Sadiul Alam Chyon, Karl Kästner, Sonu Kumar, Halinishi Yusuf, Vanessa Lamb, Lars L. Iversen, Aelis Spiller, Rajiv Sinha, Eduardo Francisco da Silva, Enner Alcantara, Chengcheng Wu, Chengpeng Lu, Chu Jian, Jingyu Wang, Nguyen Duc Thien, Lian Feng, Priyank Pravin Patel, Jiachun Huang, Adam D. Switzer   +25 more
wiley   +1 more source

Observations of Wind Profile of Marine Atmosphere Boundary Layer by Shipborne Coherent Doppler Lidar

EPJ Web of Conferences, 2016
Pulsed Coherent Doppler Lidar (CDL) system is so good as to prove the feasibility of the marine atmosphere boundary layer detection. A ship-mounted Coherent Doppler lidar was used to measure the wind profile and vertical velocity in the boundary layer ...
Wu Songhua, Yin Jiaping, Liu Bingyi, Liu Jintao, Zhang Hongwei, Song Xiaoquan, Zhang Kailin   +6 more
doaj   +1 more source

Design of a Data Acquisition, Correction and Retrieval of Na Doppler Lidar for Diurnal Measurement of Temperature and Wind in the Mesosphere and Lower Thermosphere Region

Remote Sensing, 2023
Based on the resonance fluorescence scattering mechanism, a narrowband sodium (Na) lidar can measure temperature and wind in the mesosphere and lower thermosphere (MLT) region.
Yuan Xia, Xuewu Cheng, Zelong Wang, Linmei Liu, Yong Yang, Lifang Du, Jing Jiao, Jihong Wang, Haoran Zheng, Yajuan Li, Faquan Li, Guotao Yang   +11 more
doaj   +1 more source

Lateral Momentum Transfer in Ice‐Covered Rivers

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Ice cover alters river hydrodynamics by introducing surface roughness. This roughness modifies momentum redistribution and bed shear stress. Using theoretical arguments, we present an approach for the lateral momentum load in ice‐covered streams.
Javad Souri, Berkay Koyuncu, Leonardo P. Chamorro, Trung Bao Le   +3 more
wiley   +1 more source

Development and Demonstration of Navigation Doppler Lidar for Planetary Landing Missions [PDF]

EPJ Web of Conferences
A coherent Doppler lidar has been developed by NASA for providing vector velocity and altitude data to landing vehicles. Future robotic and manned missions to planetary bodies demand precise ground-relative velocity and altitude data to execute complex ...
Amzajerdian Farzin, Hines Glenn D., Gragossian Aram, Acevedo Elisa Leal, Hsu Jonathan, Laughter Sean. A., Dostart Nathan A., Heppler Jacob M., Follman Jacob J., Liles Kaitlin A.K., Martin Kimberly J., Litton Daniel. K.   +11 more
doaj   +1 more source

The Thermodynamic and Kinematic Structure of the Planetary Boundary Layer for a Summer Lake Breeze Day in Chicago

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract The planetary boundary layer (PBL) over Chicago is strongly modulated by interactions between the lake breeze and the urban heat island (UHI). This study focuses on characterizing the thermodynamic and kinematic processes governing the Chicago UHI and its interaction with the cooler air from Lake Michigan.
Robert Jackson, Joseph O’Brien, Jiali Wang, Dimitrios K. Fytanidis, Rao Kotamarthi, Paytsar Muradyan, Maxwell Grover, Bhupendra Raut, Scott Collis, Matthew Tuftedal, Greg Anderson, Timothy J. Wagner, Stephen W. Nesbitt, Haochen Tan, Daniel Wefer, Molly Hammond   +15 more
wiley   +1 more source

Comparison of Lower Stratosphere Wind Observations From the USTC's Rayleigh Doppler Lidar and the ESA's Satellite Mission Aeolus

Earth and Space Science, 2022
Since the first spaceborne Doppler wind lidar, Aeolus, was launched, global wind field observations from space have been possible. Several ground‐ and air‐based validations followed, although most of these comparisons remained below 10 km in the ...
Chong Chen, Xianghui Xue, Dongsong Sun, Ruocan Zhao, Yuli Han, Tingdi Chen, Hengjia Liu, Yiming Zhao   +7 more
doaj   +1 more source

Gravity Wave Energy Baselines (∼30–110 km) Established From Lidar Observations at McMurdo (77.84°S, 166.67°E), Antarctica: Energy Dissipation and Constituent Diffusion

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Lidar observations above McMurdo, Antarctica from 2011 to 2024 are used to characterize gravity wave (GWs) potential energies (Ep ${E}_{p}$) in the mesosphere and lower thermosphere (MLT). Alongside characterizations in the middle atmosphere (30–70 km), the GW baselines show dissipation at all altitudes from 30 to 110 km.
Jackson Jandreau, Xinzhao Chu, Yingfei Chen, Chester S. Gardner   +3 more
wiley   +1 more source

Doppler LIDAR Developments for Aeronautics

, 2016
Detecting atmospheric hazards such as wake vortices, turbulences, wind shear or wind gusts would improve flight and airport traffic safety. Moreover, to face the current and future challenges of air traffic growth in terms of environment, safety and costs, one of the major challenges is to increase runway throughput by optimizing the distance ...
Besson, C., Dolfi-Bouteyre, A., Canat, G., Cézard, N., Augère, B., Durecu, A., Lombard, L., Valla, M., Hallermeyer, A.   +8 more
openaire   +1 more source