@misc{10481/104330,
year = {2025},
month = {5},
url = {https://hdl.handle.net/10481/104330},
abstract = {Using a methodology for the estimation of coarse particle exchanges via Doppler lidar, based on the eddy
covariance technique, profiles of vertical transport velocities were derived and analyzed. The methodology was
tested across diverse atmospheric conditions in two different Mediterranean dryland landscapes in Southeastern
Spain, namely Guadiana-UGR (extensive, inland olive grove), and Aguamarga (shrubland with maritime influence).
Firstly, study cases were analyzed and the main atmospheric mechanisms impacting particle transport
were identified. Convective mixing within the boundary layer was found to be the primary driver of the upward
particle transport. However, cloud cover was observed to attenuate the transport velocity, while significant
deposition events were observed during a Saharan dust outbreak. Secondly, positive transport velocities were
found during convective periods and lower, yet positive, values during non-convective periods. Higher transport
velocities were observed during a drier period at Guadiana-UGR, likely due to drier soil conditions. Aguamarga
exhibited notably lower transport velocities. Considering only the lowermost observational level (105 m above
the ground), net emission of particles was observed. Footprint analysis supported the representativeness of the
fluxes. Our findings provide novel insights into particle exchanges over Mediterranean drylands, quantifying the
turbulent transport and identifying its atmospheric drivers. Additionally, the considered ecosystems were found
to be net sources of particles during the study periods. These results highlight the role of drylands as emerging
contributors to global dust emissions in the context of climate change.},
organization = {MICIU/AEI/10.13039/501100011033 PID2020-117825GB-C21, PID2020-117825GB-C22, FPU21/01436, EST24/00285},
organization = {University of Granada (LS2022-1), (PPVS2024-06), (PPJIB-2024-12)},
organization = {European Union‘s Horizon 2020 (871115), (RED2022-134824-E), (H2020-INFRAIA-2020-1: 101008004)},
organization = {Junta de Andalucía (C-366-UGR23)},
organization = {Universidad de Granada/CBUA},
publisher = {Elsevier},
keywords = {Aerosol particles},
keywords = {Particle fluxes},
keywords = {Doppler lidar},
keywords = {Drylands},
keywords = {Particle emissions},
title = {Quantifying turbulent coarse particle transport over drylands of Southeastern Iberia using a stand-alone Doppler lidar methodology},
doi = {10.1016/j.atmosres.2025.108236},
author = {Abril Gago, Jesús and Ortiz Amezcua, Pablo and Kowalski, Andrew and Bravo-Aranda, Juan Antonio and Granados-Muñoz, María José and Andújar-Maqueda, Juana and Alados-Arboledas, Lucas and Guerrero Rascado, Juan Luis},
}