ORIGINAL RESEARCH
Spatial Scale Effects of 2D and 3D Urban
Landscape Pattern on Atmospheric Particulate
Matter and Their Seasonal Changes
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1
School of Tourism and Geography, Jiujiang University, Jiujiang 332005, China
2
Jiangxi Yangtze River Economic Zone Research Institute, Jiujiang University, Jiujiang 332005, China
3
School of Resources and Environment, Jiujiang University, Jiujiang 332005, China
Submission date: 2024-09-04
Final revision date: 2024-11-19
Acceptance date: 2024-12-02
Online publication date: 2025-03-10
Publication date: 2026-01-30
Corresponding author
Qingming Leng
School of Resources and Environment, Jiujiang University, Jiujiang 332005, China
Pol. J. Environ. Stud. 2026;35(1):929-943
KEYWORDS
TOPICS
ABSTRACT
The urban landscape pattern has critical effects on atmospheric particulate matter (PM) pollution.
However, the effects may greatly differ with variations of the spatial scales and seasons, which remains
poorly understood. This study established a multiple spatial scale analysis on the impact of the urban
landscape pattern on PM pollution across different seasons in Nanchang, China, via regular and
redundancy analysis (RDA). Six 2D and six 3D metrics were employed to characterize the landscape
pattern with buffer radii of 100, 300, 600, 900, 1,200, 2,400, and 4,800 m centered at monitoring
stations. Results showed that the effects of the urban landscape pattern on PM pollution have significant
seasonal differences and spatial scale effects. Urban landscape pattern has a stronger influence on PM
pollution in fall and winter than in spring and summer. The explanatory ability of selected metrics on
PM concentrations first increased, then decreased, and finally increased as the scales increased, and
the highest accumulated explanatory ability was observed at the 900 m scale. At smaller scales (buffer
radii ≤ 900 m), the ability of 3D metrics was stronger than 2D metrics to explain the PM changes, and
at larger scales (buffer radii ≥ 1,200 m), the 2D metrics were more explanatory. Percentage of building
landscape (PLAND) and patch cohesion index (COHESION) were the key 2D metrics affecting PM
pollution, and spatial congestion degree (SCD) and landscape enclosing degree (LED) were the key
3D metrics. The results provide important implications in urban planning for effective PM pollution
mitigation.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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