Long term evolution of the surface refractivity for arctic regions
dc.contributor.author | Bettouche, Y. | |
dc.contributor.author | Kouki, A. | |
dc.contributor.author | Agba, B. | |
dc.contributor.author | Obeidat, Huthaifa A.N. | |
dc.contributor.author | Alhassan, H. | |
dc.contributor.author | Rodriguez, Jonathan | |
dc.contributor.author | Abd-Alhameed, Raed | |
dc.contributor.author | Jones, Steven M.R. | |
dc.date.accessioned | 2019-06-28T11:38:12Z | |
dc.date.available | 2019-06-28T11:38:12Z | |
dc.date.issued | 2019-07 | |
dc.identifier.citation | Bettouche Y, Kouki A, Agba B et al (2019) Long term evolution of the surface refractivity for arctic regions. Radio Science. 54(7): 602-611. | en_US |
dc.identifier.uri | http://hdl.handle.net/10454/17153 | |
dc.description | Yes | en_US |
dc.description.abstract | In this paper, local meteorological data for a period of 35 years (from 1979 to 2013) from Kuujuaq station have been used to calculate the surface refractivity, N and to estimate the vertical refractivity gradient, dN1, in the lowest atmospheric layer above the ground. Monthly and yearly variations of the mean of N and dN1 are provided. The values obtained are compared with the corresponding values from the ITU maps. The long-term trend of the surface refractivity is also investigated. The data demonstrate that the indices N and dN1 are subject to an evolution which may have significance in the context of climate change (CC). Monthly means of N show an increasing departure from ITU-R values since 1990. Yearly mean values of the dN1 show a progressive decrease over the period of study. Seasonal means of dN1 show a decrease over time, especially for summer. Such a trend may increase the occurrence of super-refraction. However, currently available ITU-R recommendations for microwave link design assume a stationary climate, so there is a need for a new modelling approach. | en_US |
dc.language.iso | en | en_US |
dc.rights | ©2019 American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's self-archiving policy. | |
dc.subject | Surface refractivity | en_US |
dc.subject | Water vapour pressure | en_US |
dc.subject | Vertical refractivity gradient | en_US |
dc.title | Long term evolution of the surface refractivity for arctic regions | en_US |
dc.status.refereed | Yes | en_US |
dc.date.Accepted | 2019-06-22 | |
dc.date.application | 2019-07-02 | |
dc.type | Article | en_US |
dc.type.version | Published version | en_US |
dc.identifier.doi | https://doi.org/10.1029/2018RS006671 | |
refterms.dateFOA | 2019-06-28T11:38:34Z |