Results 31 to 40 of about 3,413 (211)

A Comparison of Atmospheric Boundary Layer Height Determination Methods Using GNSS Radio Occultation Data

Atmosphere, 2023
The accurate determination of Atmospheric Boundary Layer Height (ABLH) is crucial in various atmospheric studies and practical applications. In this study, we present a comprehensive comparative analysis of five distinct methods for estimating ABLH using
Cong Qiu, Xiaoming Wang, Haobo Li, Kai Zhou, Jinglei Zhang, Zhe Li, Dingyi Liu, Hong Yuan   +7 more
doaj   +1 more source

Wavelet Covariance Matrix Structure and Bayesian-Wavelet Estimation of Autoregressive Process Parameters with Long-Term Memory

پژوهش‌های ریاضی, 2020
Introduction The data obtained from observing a phenomenon over time is very common. One of the most popular models in time series and signal processing is the Autoregressive moving average model (ARMA).
Mahmod Afshari, Saeed Tahmasbi, Shabnam Shadman   +2 more
doaj  

Comparison of PBL Heights from Ceilometer Measurements and Greenhouse Gases Concentrations in São Paulo

Atmosphere, 2023
This paper presents a study conducted in São Paulo, Brazil, where the planetary boundary layer height (PBLH) was determined using ceilometer data and the wavelet covariance transform method.
Amanda Vieira dos Santos, Elaine Cristina Araújo, Izabel da Silva Andrade, Thais Corrêa, Márcia Talita Amorim Marques, Carlos Eduardo Souto-Oliveira, Noele Franchi Leonardo, Fernanda de Mendonça Macedo, Giovanni Souza, Pérola Pereira de Queiroz Lopes, Gregori de Arruda Moreira, Maria de Fátima Andrade, Eduardo Landulfo   +12 more
doaj   +1 more source

Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models [PDF]

Atmospheric Chemistry and Physics, 2020
The significance of planetary boundary layer (PBL) height detection is apparent in various fields, especially in air pollution dispersion assessments. Numerical weather models produce a high spatial and temporal resolution of PBL heights; however, their ...
L. Uzan, L. Uzan, S. Egert, P. Khain, Y. Levi, E. Vladislavsky, P. Alpert   +6 more
doaj   +1 more source

Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India [PDF]

Atmospheric Measurement Techniques, 2019
In this work, the height of the planetary boundary layer (PBLH) is investigated over Gwal Pahari (Gual Pahari), New Delhi, for almost a year. To this end, ground-based measurements from a multiwavelength Raman lidar were used.
K. Nakoudi, K. Nakoudi, K. Nakoudi, E. Giannakaki, E. Giannakaki, A. Dandou, M. Tombrou, M. Komppula   +7 more
doaj   +1 more source

Edge Detection Method for Determining Boundary Layer Height Based on Doppler Lidar

Atmosphere, 2021
The top of the boundary layer, referred to as the planetary boundary layer height (BLH), is an important physical parameter in atmospheric numerical models, which has a critical role in atmospheric simulation, air pollution prevention, and climate ...
Ya’ni Pan, Zhili Jin, Pengfei Tong, Weiwei Xu, Wei Wang   +4 more
doaj   +1 more source

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Variability of the Boundary Layer Over an Urban Continental Site Based on 10 Years of Active Remote Sensing Observations in Warsaw

Remote Sensing, 2020
Atmospheric boundary layer height (ABLH) was observed by the CHM15k ceilometer (January 2008 to October 2013) and the PollyXT lidar (July 2013 to December 2018) over the European Aerosol Research LIdar NETwork to Establish an Aerosol Climatology ...
Dongxiang Wang, Iwona S. Stachlewska, Xiaoquan Song, Birgit Heese, Anca Nemuc   +4 more
doaj   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Sound identification method of coal mine gas and coal dust explosion based on wavelet scattering transform

Meitan kexue jishu
To solve the problems of high false alarm rate and leakage rate of coal mine gas and coal dust explosion disaster alarm methods, and improve the accuracy of coal mine gas and coal dust explosion perception, sound identification method of coal mine gas ...
Xingchen YU, Xiaowei LI
doaj   +1 more source