Geographically and temporally weighted principal component analysis: a new approach for exploring air pollution non-stationarity in China, 2015–2019

IF 1 4区地球科学 Q4 GEOGRAPHY, PHYSICAL

Journal of Spatial Science Pub Date : 2022-01-26 DOI:10.1080/14498596.2022.2028270

Jiakuan Han, Xiaochen Kang, Yi Yang, Yinyin Zhang

引用次数: 1

Abstract

ABSTRACT In spatiotemporal applications, geographically weighted principal component analysis (GWPCA) is commonly adopted to describe spatial heterogeneity. However, time effects are ignored in GWPCA. In this study, the temporal effect was incorporated into GWPCA . Thus, an extended model, geographically and temporally weighted principal component analysis (GTWPCA), was developed to simultaneously explore spatial and temporal non-stationarity. The GTWPCA was implemented using a case study of air pollution in China. The results mainly show that GTWPC1 (the local component one in GTWPCA) corresponds to a ‘winning group’ with constantly varying ‘winning’ variables adapted to the spatiotemporal non-stationary characteristics of air pollution in China.

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地理和时间加权主成分分析：探索2015-2019年中国空气污染非平稳性的新方法

摘要在时空应用中，通常采用地理加权主成分分析（GWPCA）来描述空间异质性。但是，GWPCA忽略了时间效应。在本研究中，将时间效应纳入GWPCA。因此，开发了一个扩展模型，即地理和时间加权主成分分析（GTWPCA），以同时探索空间和时间的非平稳性。GTWPCA是通过对中国空气污染的案例研究来实施的。结果主要表明，GTWPC1（GTWPCA中的局部分量）对应于一个“获胜组”，其“获胜”变量不断变化，以适应中国空气污染的时空非平稳特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Spatial Science 地学-地质学

CiteScore

5.00

自引率

5.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Spatial Science publishes papers broadly across the spatial sciences including such areas as cartography, geodesy, geographic information science, hydrography, digital image analysis and photogrammetry, remote sensing, surveying and related areas. Two types of papers are published by he journal: Research Papers and Professional Papers. Research Papers (including reviews) are peer-reviewed and must meet a minimum standard of making a contribution to the knowledge base of an area of the spatial sciences. This can be achieved through the empirical or theoretical contribution to knowledge that produces significant new outcomes. It is anticipated that Professional Papers will be written by industry practitioners. Professional Papers describe innovative aspects of professional practise and applications that advance the development of the spatial industry.