Results 51 to 60 of about 1,690 (181)

Simultaneous Observations of Mesoscale Gravity Waves Over the Central US with CRRL Na Doppler Lidars and USU Temperature Mapper

EPJ Web of Conferences, 2016
We present the first coordinated study of a 1-h mesoscale gravity wave event detected simultaneously by a Na Doppler lidar at Boulder, CO (40.1°N, 105.2°W), and a Na Doppler lidar and an airglow temperature mapper (AMTM) at Logan, UT (41.7°N, 111.8°W) in
Lu Xian, Chen Cao, Huang Wentao, Smith John A., Zhao Jian, Chu Xinzhao, Yuan Tao, Pautet Pierre-Dominique, Taylor Mike J.   +8 more
doaj   +1 more source

Application of coherent lidar technique: Water vapor DIAL and data assimilation for three-dimensional wind flow reconstructions [PDF]

EPJ Web of Conferences
We recently expanded the wind sensing coherent Doppler lidar (CDL) technologies to the coherent differential absorption lidar (DIAL) and data assimilation with computational fluid dynamics (CFD) simulation.
Imaki Masaharu
doaj   +1 more source

The Influence of Aged Smoke on Urban Ozone: Aircraft Measurements in Chicago During the 2023 Canadian Wildfires

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract As large wildfires become more frequent and severe in North America due to heightened fuel aridity and fire weather conditions driven by anthropogenic climate change, wildfire smoke has an increasingly important influence on air quality. Transported smoke can impact urban boundary layer ozone (O3) directly, via the entrainment of O3 formed in ...
W. S. Chace, C. Womack, A. Ahern, K. Ball, K. H. Bates, B. Bohn, C. A. Brock, M. Coggon, J. D. Crounse, N. Desai, H. Fuchs, J. Gilman, J. Gristey, H. N. Huynh, R. Jackson, C. M. Jernigan, J. Kaiser, M. Lin, M. Lyu, A. M. Middlebrook, G. A. Novak, A. Novelli, J. Peischl, A. Piasecki, M. A. Robinson, A. Rollins, N. B. Schafer, M. Selby, C. Senff, A. Stainsby, C. E. Stockwell, S. J. Taylor, S. Thakali, V. Treadaway, P. R. Veres, C. Warneke, E. Waxman, P. O. Wennberg, G. M. Wolfe, L. Xu, K. Zuraski, S. S. Brown   +41 more
wiley   +1 more source

Atmospheric Boundary Layer Classification With Doppler Lidar [PDF]

Journal of Geophysical Research: Atmospheres, 2018
AbstractWe present a method using Doppler lidar data for identifying the main sources of turbulent mixing within the atmospheric boundary layer. The method identifies the presence of turbulence and then assigns a turbulent source by combining several lidar quantities: attenuated backscatter coefficient, vertical velocity skewness, dissipation rate of ...
A. J. Manninen, T. Marke, M. Tuononen, E. J. O'Connor   +3 more
openaire   +2 more sources

Rapid Hydraulic Modelling in Post‐Wildfire Channels Using a Tiered Framework

Earth Surface Processes and Landforms, Volume 51, Issue 8, August 2026.
A three‐tier hydraulic modelling framework enables rapid, safe calibration of post‐wildfire channel models using remote sensing and limited field data. Tested on two contrasting burned Colorado watersheds, discharge and salt tracer velocity measurements alone captured most of the achievable model accuracy, with detailed bathymetric survey adding little
Jack A. Derbique, Ryan R. Morrison, Nicholas Christensen, Daniel C. White   +3 more
wiley   +1 more source

Aircraft Wake Vortex Measurement with Coherent Doppler Lidar

EPJ Web of Conferences, 2016
Aircraft vortices are generated by the lift-producing surfaces of the aircraft. The variability of near-surface conditions can change the drop rate and cause the cell of the wake vortex to twist and contort unpredictably.
Wu Songhua, Liu Bingyi, Liu Jintao
doaj   +1 more source

Assessing Cloud and Precipitation Properties on Temporal Scales Using LASSO Simulations Over the ARM Eastern North Atlantic (ENA) Site

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract The representation of low clouds and precipitation remains a major source of uncertainty in Earth System Models (ESMs), particularly due to challenges in representing their sub‐grid variability and scale‐dependent sampling. This study evaluates the performance of preliminary simulations from the Large‐Eddy Simulation (LES) Atmospheric ...
Jiakun Liang, Daniel T. McCoy, William I. Gustafson Jr., Scott E. Giangrande, Satoshi Endo, John Rausch, Jennifer D. Small Griswold   +6 more
wiley   +1 more source

Utilizing NASA's Operation IceBridge Airborne SWE and Precipitation Products to Assess Surface Snow Over Alaskan Glaciers

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Accurately estimating Snow Water Equivalent (SWE) in glacierized regions is critical for glacier modeling and mass balance analysis yet remains challenging due to sparse observations and uncertainties in precipitation products. The objectives are twofold: (a) assess how well three widely used precipitation datasets—Stage IV (a radar–gauge ...
Yang Song, Ali Behrangi
wiley   +1 more source

Virtual Doppler Lidar Instrument

Journal of Atmospheric and Oceanic Technology, 2001
Abstract Doppler lidars measure the range-resolved line-of-sight wind component by extracting the Doppler shift of radiation backscattered from atmospheric aerosols and molecules. A virtual instrument was developed to simulate wind measurements by flying virtually over the atmosphere.
Leike, I., Streicher, J., Werner, C., Banakh, V., Smalikho, I., Wergen, W., Cress, A.   +6 more
openaire   +2 more sources

Vertical velocity observed by Doppler lidar during cops ? A case study with a convective rain event

Meteorologische Zeitschrift, 2013
Convective and Orographically-Induced Precipitation Study (COPS), conducted in the Black Forest region in Southern Germany and Eastern France during the summer of 2007.
Jenny Davis, Chris. Collier, Fay Davies, Ralph Burton, Guy Pearson, Paolo Di Girolamo   +5 more
doaj   +1 more source