2022
DOI: 10.3390/rs15010046
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Long-Term Variability of Atmospheric Visual Range (1980–2020) over Diverse Topography of Pakistan

Abstract: A substantial drop in atmospheric visibility or visual range (VR) is documented in several parts of the world. We examined the long-term spatiotemporal variability in ground-based VR data for ten airports in Pakistan from 1980 to 2020. Average VR time series analysis was performed using nonparametric tests of Mann–Kendall (MK), Modified Mann–Kendall (MMK), Sen’s Slope (SS), and Sequential Mann–Kendall (SMK), followed by spatiotemporal mapping. Bad VR (<5 km) conditions prevailed over more than 60% of the st… Show more

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Cited by 4 publications
(2 citation statements)
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“…Buner, situated within the Malakand division, lies in a geographical expanse stretching from 34-11° to 34-43° North Latitude and from 72-13° to 72-45° East Longitude, encompassing an area of 1865 km². With a population of approximately 897,319 as per the 2017 census, this region is significant in terms of agricultural and livestock activities (14). The research methodology involved meticulous sample collection and laboratory analysis.…”
Section: Methodsmentioning
confidence: 99%
“…Buner, situated within the Malakand division, lies in a geographical expanse stretching from 34-11° to 34-43° North Latitude and from 72-13° to 72-45° East Longitude, encompassing an area of 1865 km². With a population of approximately 897,319 as per the 2017 census, this region is significant in terms of agricultural and livestock activities (14). The research methodology involved meticulous sample collection and laboratory analysis.…”
Section: Methodsmentioning
confidence: 99%
“…where n denotes the number of data in the sequence, x i and x j signify the data values in time series i and j (j > i), and the sign (x j − x i ) indicates the sign function [27].…”
Section: Sen + Mann-kendall Trend Analysismentioning
confidence: 99%