@misc{10481/104313,
year = {2025},
month = {5},
url = {https://hdl.handle.net/10481/104313},
abstract = {The atmospheric boundary layer (ABL) is the lowest layer of the atmosphere, where most of the interactions
between the atmosphere and the Earth’s surface occur. Within this layer, the air movements and the turbulent
processes facilitate the dispersion and transport of particles. This work quantifies the effect of ABL-dynamics
related variables on the surface pollen concentrations in the city of Granada, southeastern Spain. The Main
Pollen Season (MPS) of two pollen types (Olea and Cupressaceae) and Doppler lidar data for different height
ranges and ABL regimes were used for the period 2017-2022 and statistically analyzed based on Spearman
correlations and Generalized Linear Model (GLM). Olea pollen concentrations, mainly originating from sources in
the outskirts of the city, were significantly influenced by daytime wind direction, transporting high concentrations
into the urban area, explaining up to 28% of the variability of the Olea pollen concentrations in the ABL of
the city. At night, surface Olea pollen concentrations were affected by vertical wind, which explain the 5% of the
variability, leading to fluctuations associated with its vertical transport. For Cupressaceae pollen concentrations,
however, the pollen sources are located within the city and surface concentrations of Cupressaceae pollen are
predominantly influenced by the urban ABL. The variability in surface concentrations is partly determined by
diverse phenomena and conditions occurring across different regimes of ABL dynamics. Katabatic flows significantly
contributed to Cupressaceae pollen concentrations at night, while high turbulence produced by the
convective boundary layer (CBL) played a key role in their dispersion during daytime, explaining up to 10% of
the variability of the Cupressaceae pollen concentrations near to surface. The difference in the results between
both pollen types can be attributed to several interrelated factors such as location of sources, local weather
conditions, different ABL regimes, intrinsic characteristics of pollen, and the flowering phenology and interactions
with other environmental factors. The overall results demonstrate the substantial influence of ABL
dynamics on surface pollen concentrations (explain up to 29% of the variability for Olea pollen concentrations
and 37% for Cupressaceae ones), highlighting its crucial role in the particle transport, dispersion and distribution
in the atmosphere. These findings emphasize the need for a better understanding of the ABL to adequately
address air quality and public health challenges in urban environments.},
organization = {Junta de Andalucía (C-366-UGR23), (A-RNM-430-UGR20), (C-EXP-167-UGR23)},
organization = {University of Granada (LS2022-1), (LS2024-3),  PP2022.PP.34},
organization = {Consejería de Universidad, Investigación e Innovación},
organization = {Gobierno de España BIOD22_001, BIOD22_002},
organization = {Unión Europea – NextGenerationEU},
organization = {European Union's Horizon 2020  (871115), (101008004), (RED2022-134824-E)},
organization = {COST Action PROBE (CA18235)},
organization = {MCIN/AEI/10.13039/501100011033 PID2020-117825GB-C21, PID2020-117825GB-C22, PID2020-120015RB-I00, FPU 21/01436},
organization = {Universidad de Granada/CBUA},
publisher = {Elsevier},
keywords = {Doppler lidar},
keywords = {ABL},
keywords = {Turbulence},
keywords = {Pollen},
keywords = {dispersion},
title = {The Role of Atmospheric Boundary Layer Wind and Turbulence on Surface Pollen Levels},
doi = {10.1016/j.agrformet.2025.110584},
author = {Andujar-Maqueda, Juana and Ortiz Amezcua, Pablo and Cariñanos González, Paloma and Abril Gago, Jesús and De Linares Fernández, Concepción and De Arruda Moreira, Gregori and Bravo Aranda, Juan Antonio and Granados Muñoz, María José and Alados Arboledas, Lucas and Guerrero Rascado, Juan Luis},
}