RT info:eu-repo/semantics/article
T1 Dust events characterization from visibility, trends and dust adversity index in the Canary Islands for the period 1980-2022.
A1 Alonso Pérez, Silvia
A1 Suárez Molina, D.
A1 Cuevas, E.
A1 Cana, L.
A1 Montero, G.
A1 Oliver, A.
A2 Ingeniería Industrial
K1 Air quality in the Canary Islands
K1 Data analysis 1980-2022
K1 Dust in suspension Canary Islands
AB Dust events in the Canary Islands have been documented since the late 19th century. However, during the past few years, several severe dust episodes have occurred in the Canary Islands, resulting in significant impacts on various sectors, such as aviation, air quality, and health, among others. These recent severe events have drawn the attention of both scientists and the general population, raising questions about whether these episodes are now more frequent and more severe. This study analyzes 483 dust events recorded in the Canary Islands over the last 40 years.Data analysis reveals that the average number of dust event days per year is approximately 24 days, and these events have an average duration of 1.8 days, both of which show a statistically significant decreasing trend over the series. Seasonal examination indicates that events occurring in the first and fourth quarters of the year have twice the duration of those in the other quarters. Furthermore, on an annual basis, events in the firstquarter exhibit negative trends in both average and minimum visibilities. This suggests that dust events in the Canary Islands are becoming shorter in duration but more intense in terms of visibility.In this article, the Dust Adversity Index (DAI) is introduced to objectively compare the severity of events. Finally, anomalies in geopotential have been utilized to determine the prevailing synoptic patterns during dust events. It is evident that the dominant synoptic pattern during the first and fourth quarters of the year consists of a low cut-off system located to the west of the Canary Islands and a high-pressure system to the north of the Iberian Peninsula.
SN 2405-8440
YR 2024
FD 2024
LK http://riull.ull.es/xmlui/handle/915/39720
UL http://riull.ull.es/xmlui/handle/915/39720
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 22-nov-2024