Spatial distribution of air pollutants in the middle reaches of the Yellow River Basin in winter 2015-2019

doi:10.13474/j.cnki.11-2246.2021.303

Abstract

Abstract: Based on the six air pollutants concentrations in the middle reaches of the Yellow River Basin (Shanxi section and Shaanxi section) in the winter of 2015-2019, this paper studies the variation characteristics of air pollutants in the middle reaches of the Yellow River Basin in winter. The results show that the concentrations of PM₁₀ and CO in the middle reaches of the Yellow River Basin decrease continuously from 2015 to 2019, and the O₃ concentration continues to increase, and the average concentrations of PM_2.5, SO₂ and NO₂ increase firstly and then decrease. The concentrations of NO₂, CO, PM_2.5, PM₁₀ and SO₂ are the lowest in 2019. The average concentration of O₃ is the highest in winter of 2019 (54 μg/m³). The concentration of PM_2.5 in the lower reaches of the study area is higher than that in the upper reaches, and gradually increases from north to south along the Yellow River. The concentration of PM_2.5 in the Shanxi section of the east side of the Yellow River is higher than that in the Shaanxi section of the west side. The spatial distribution of PM₁₀ concentration in the study area changes from high in the East and low in the west of the Yellow River in 2015-2016 to low in the upstream and high in the downstream in 2017-2019. The concentration of SO₂ in the east bank of the Yellow River is higher than that in the west bank. The high NO₂ value region change from the lower west of the Yellow River in 2015-2017 to the middle and upper reaches of the Yellow River in 2018-2019. The high CO concentration area is located in the lower reaches of the east side of the Yellow River. The spatial distribution of O₃ concentration is not obvious, but the concentration increases significantly in recent five years. So we need to strengthen the monitoring and prevention of ozone in the future.

Key words: middle reaches of the Yellow River, air pollutants, air quality, spatio-temporal distribution

CLC Number:

WANG Weisi, MA Qingxia, ZHANG Jianchen, LI Guangjia. Spatial distribution of air pollutants in the middle reaches of the Yellow River Basin in winter 2015-2019[J]. Bulletin of Surveying and Mapping, 2021, 0(10): 39-47.

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