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Data for Seasonal Reversal of Nitrogen Oxide Fluxes Challenges the Air Quality Benefits of Urban Green Spaces

Identification

Clé publique

radar:r-0f535018be0bab4107ea52726569e7d2

Auteurs

Qian Yu

Année déclarée

2026

Langue déclarée

und

Type source

Dataset

Première détection

2026-11-13T15:29:13.852609+00:00

Dernière observation des métadonnées

2026-11-13T15:29:13.852609+00:00

Dernière vérification HTTP

Non effectuée

Résumé documentaire — langue originale

Urban green spaces (UGS) are widely promoted as a Nature-based Solution (<i>Nb</i>S) to mitigate nitrogen oxides (NOx= NO + NO₂), which are critical air pollutants that directly impair human health and drive the formation of ground-level ozone and secondary aerosols. However, the efficacy of this strategy remains debated because current assessments typically view UGS as passive sinks, neglecting the biogenic release of NO from managed urban soils. Here, we quantify the NOx exchange of UGS across China by integrating high-frequency field observations from nine urban plots with machine learning upscaling. Separate RF models were trained for each gas (NO and NO₂) under each vegetation-cover category (grassland/forest, high/low cover), resulting in eight distinct predictive models. The trained RF models were applied to predict hourly NO and NO₂ fluxes for January, April, July, and October 2023, corresponding to winter, spring, summer, and autumn, respectively.All input data were spatially aggregated to the target 27 km grid. For each grid cell, the predicted fluxes for the four UGS types were weighted by their respective area fractions (derived from the UGS distribution map) and summed to obtain the total UGS-mediated flux. Annual total fluxes were subsequently estimated by temporally interpolating and integrating the fluxes from the four seasonal snapshots.

Identifiants

DOI

10.6084/m9.figshare.33421414

Repères documentaires

Famille documentaire

dataset

Types déclarés par les sources

Dataset

Éditeurs

figshare

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Sources

DataCite · Document 1

• Document · https://figshare.com/articles/dataset/Data_for_Seasonal_Reversal_of_Nitrogen_Oxide_Fluxes_Challenges_the_Air_Quality_Benefits_of_Urban_Green_Spaces/33421414

Statut documentaire

Pertinence à examiner

Bibliothèque

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