Results 51 to 60 of about 5,525 (234)

The Use of Laser Sensing for Solving Meteorological Problems Related to Researching and Ensuring the Safety of Space Flights

Sensors
This paper is devoted to the issue of using laser (lidar) sensing to determine wind speed and direction when solving practical problems during the analysis of meteorological conditions in the area around spaceports. This issue is relevant both for making decisions on the possibility of a safe launch of a launch vehicle and for conducting search and ...
Anatoly S. Boreysho, Maxim A. Konyaev, Sergey Y. Strakhov, Andrey V. Trilis, Natalia V. Sotnikova   +4 more
openaire   +3 more sources

Evaluating the realism of double moment parameterised particle size distributions in a midlatitude frontal ice cloud with complex microphysics

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Uncertainties in the representation of ice particle size distributions (PSDs) cause inaccuracies in parameterisations of clouds. In this study, observed PSDs from a midlatitude frontal case study are compared with gamma PSDs with the same concentration and ice water content.
Rosie M. Mammatt, Christopher D. Westbrook, Jonathan Crosier, Karina McCusker   +3 more
wiley   +1 more source

Intercomparison of aerosol optical depths from four reanalyses and their multi-reanalysis consensus [PDF]

Atmospheric Chemistry and Physics
The emergence of aerosol reanalyses in recent years has facilitated a comprehensive and systematic evaluation of aerosol optical depth (AOD) trends and attribution over multi-decadal timescales.
P. Xian, J. S. Reid, M. Ades, A. Benedetti, P. R. Colarco, A. da Silva, T. F. Eck, T. F. Eck, J. Flemming, E. J. Hyer, Z. Kipling, S. Rémy, T. T. Sekiyama, T. Tanaka, K. Yumimoto, J. Zhang   +15 more
doaj   +1 more source

Evaluating anisotropy‐based Monin–Obukhov similarity theory over canopies and complex terrain

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study shows that an anisotropy‐based generalization of Monin–Obukhov surface‐layer scaling (SC23) applies readily across a wide range of atmospheric conditions with variable terrain, canopies, and land‐cover complexity. This work focuses on the scaling of velocity variances for 7 years at the 47 sites in the National Ecological Observation Network
Tyler S. Waterman, Ivana Stiperski, Nathaniel Chaney, Marc Calaf   +3 more
wiley   +1 more source

Meander‐Bend Erosion Dynamics Along a Gravel‐Bed River: Insights From Short‐Term UAV Monitoring

River Research and Applications, EarlyView.
ABSTRACT Riverbank erosion is a natural process in meandering rivers that contributes to sediment supply and geomorphic diversity, yet it can threaten infrastructure and human activities within the floodplain. Recently, many studies have used high‐resolution remote sensing technologies to measure bank erosion, but they often focus on technical aspects ...
Katarina Pavlek, Mateo Gašparović, Tomáš Galia   +2 more
wiley   +1 more source

A 3.5-Dimensional Variational Method for Doppler Radar Data Assimilation and Its Application to Phased-Array Radar Observations

Advances in Meteorology, 2010
A 3.5-dimensional variational method is developed for Doppler radar data assimilation. In this method, incremental analyses are performed in three steps to update the model state upon the background state provided by the model prediction.
Qin Xu, Li Wei, Wei Gu, Jiandong Gong, Qingyun Zhao   +4 more
doaj   +1 more source

Programmed unmanned aerial vehicles show great potential for monitoring marine megafauna in specific areas of interest

Remote Sensing in Ecology and Conservation, EarlyView.
Targeted conservation measures are contingent on robust knowledge of spatio‐temporal animal distribution in areas of interest. We explore unmanned aerial vehicle (UAV) transect monitoring as a novel method for standardized digital aerial surveys of marine megafauna by investigating the fine‐resolution spatio‐temporal distribution of harbour porpoises ...
Dinah Hartmann, Valdemar Palmqvist, Johanna Stedt   +2 more
wiley   +1 more source

Analysis of Cloud Top Parameters on the Qinghai-Xizang (Tibet) Plateau and Their Application in Airship Research

Gaoyuan qixiang
Stratospheric airships, due to their excellent performance, exhibit great potential in flight missions within the aerospace field.However, the complexity of the stratospheric environment presents significant challenges to flight safety.Therefore ...
YANG Molan, XU Wenkuan, BI Yitong, LÜ Weihao, YANG Yanchu, MIAO Jinggang   +5 more
doaj   +1 more source

New insights from the Jülich Ozone Sonde Intercomparison Experiment: calibration functions traceable to one ozone reference instrument [PDF]

Atmospheric Measurement Techniques
Although in principle ECC (electrochemical concentration cell) ozonesondes are absolute measuring devices, in practice they have several “artefacts” which change over the course of a flight.
H. G. J. Smit, D. Poyraz, R. Van Malderen, A. M. Thompson, A. M. Thompson, D. W. Tarasick, R. M. Stauffer, B. J. Johnson, D. E. Kollonige, D. E. Kollonige   +9 more
doaj   +1 more source

Application of remotely piloted aircraft systems in observing the atmospheric boundary layer over Antarctic sea ice in winter [PDF]

Polar Research, 2015
The main aim of this paper is to explore the potential of combining measurements from fixed- and rotary-wing remotely piloted aircraft systems (RPAS) to complement data sets from radio soundings as well as ship and sea-ice-based instrumentation for ...
Marius O. Jonassen, Priit Tisler, Barbara Altstädter, Andreas Scholtz, Timo Vihma, Astrid Lampert, Gert König-Langlo, Christof Lüpkes   +7 more
doaj   +1 more source