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Global warming strengthens atmospheric ducting
Atmospheric ducts (ADs) provide efficient electromagnetic wave channels for beyond line-of-sight (BLOS) propagation and can serve as a sensitive diagnostic factor for the change of lower atmosphere. Based on the ERA5 model-level reanalysis data (1979–2024), a global-scale assessment of the response of AD evolution to global warming has been revealed ...
xiaofeng Zhao +5 more
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Analysis and testing on the interference due to atmospheric duct of 5G
Dianxin kexue, 2022 Abstact: 5G (time division duplexing, TDD) system will be effected by the interference from 5G system due to atmospheric duct.The risk and current situation of 5G system in 2.6 GHz band were introduced and the interference characteristics of 5G interference due to atmospheric duct were summarized.Then based on the interference test results of the ...
Xingang SONG +3 more
openaire +2 more sources
Future InternetThe variations in the atmospheric refractivity in the lower atmosphere create a natural phenomenon known as atmospheric ducts. The atmospheric ducts allow radio signals to travel long distances.
Rasendram Muralitharan +3 more
doaj +1 more source
An artificial neural network predictor for tropospheric surface duct phenomena [PDF]
Nonlinear Processes in Geophysics, 2007 In this work, an artificial neural network (ANN) model is developed and used to predict the presence of ducting phenomena for a specific time, taking into account ground values of atmospheric pressure, relative humidity and temperature.
S. A. Isaakidis +3 more
doaj
Atmospheric ducts can transport sound in two directions [PDF]
Eos, Transactions American Geophysical Union, 2014 When conditions are right, temperature gradients and fast jets of wind can help to establish atmospheric ducts—pathways in the atmosphere that promote the propagation of low‐frequency acoustic waves (infrasound)—across long distances. Atmospheric ducts are part of the basis behind over‐the‐horizon radar, the source of some particularly clear mirages ...
openaire +1 more source
Sir Syed University Research Journal of Engineering and Technology, 2020 The propagation of microwave (MW) of frequencies above 300 MHz is affected by the existence and properties of the atmospheric duct. Atmospheric ducts exist in many areas of the world ocean, including the Arabian Sea.
Imran Ullah Khan
doaj
Coastal effects on radar propagation in atmospheric ducting conditions
Meteorological Applications, 2006 AbstractTwo models were used to assess the effects of coastal characteristics on radar propagation in ducting conditions in the Persian Gulf. The NCAR/Penn State MM5 model simulated atmospheric conditions at a 5‐km horizontal spatial and hourly temporal resolution on a day on which observations of ducts existed.
B. W. Atkinson, M. Zhu
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Marangoni ducts for energy harvesting [PDF]
, 2020 The possibility for harnessing energy from thermal or concentration gradients by the use of ducts lined with hydrophobic microcavities is discussed.
Heras Jiménez, Salvador Augusto de las +1 more
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Applicability of condensation particle counters to measure atmospheric clusters [PDF]
, 2008 This study presents an evaluation of a pulse height condensation particle counter (PH-CPC) and an expansion condensation particle counter (E-CPC) in terms of measuring ambient and laboratory-generated molecular and ion clusters. Ambient molecular cluster
O'Dowd, Colin D. +44 more
core +2 more sources
What can 14 CO measurements tell us about OH? [PDF]
, 2008 The possible use of 14CO measurements to constrain hydroxyl radical (OH) concentrations in the atmosphere is investigated. 14CO is mainly produced in the upper atmosphere from cosmic radiation.
Mak, J. +7 more
core +2 more sources