Diurnal variations in primary and secondary organic aerosols in an eastern China coastal city: The impact of land-sea breezes

Zhang, Qiang; Hu, Wei; Ren, Hong; Yang, Jianbo; Deng, Junjun; Wang, Dawei; Sun, Yele; Wang, Zifa; Kawamura, Kimitaka; Fu, Pingqing

doi:10.1016/j.envpol.2023.121016

Cited by 10 publications

(4 citation statements)

References 86 publications

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“…S17b †). 83,84 Long-range transport of pollution from the North China Plain during the heating season is one important cause of haze events in Shanghai, 85 which is consistent with the hot area in the north wind section with a high windspeed in the CPF polar plots of PNC N5 and PNC N ′ 5 (Fig. S17 †).…”

Section: Source Apportionmentsupporting

confidence: 69%

Traffic, marine ships and nucleation as the main sources of ultrafine particles in suburban Shanghai, China

Wang,

Huo,

Chen

et al. 2023

Environ. Sci.: Atmos.

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Section: Source Apportionmentsupporting

confidence: 69%

Traffic, marine ships and nucleation as the main sources of ultrafine particles in suburban Shanghai, China

Wang,

Huo,

Chen

et al. 2023

Environ. Sci.: Atmos.

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“…In this way, the distinct transforming process between the sea breeze and land breeze can be observed. The transfer distance and influence height of SLB can be distinguished (Q. Zhang et al., 2023). In addition, the wind speed of sea breeze should be greater than 1 m·s −1 and the wind speed of land breeze should be greater than 0.5 m·s −1 (Bei et al., 2018).…”

Section: Methodsmentioning

confidence: 99%

Weakened Sea‐Land Breeze in a Coastal Megacity Driven by Urbanization and Ocean Warming

et al. 2023

Self Cite

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The sea‐land breeze (SLB) occurs regularly in coastal areas and influences the local climate and atmospheric environment. Fifteen‐year observations (2005–2019) from urban, coastal, and marine stations were collected to examine the trend in the number of SLB days (SLBD) in Tianjin, a coastal megacity in China. The number of SLBD in Tianjin generally showed a decreasing trend with an annual average decline rate of 3.89%. The average land breeze speed decreased by 0.20 m·s−1 and sea breeze speed decreased by 0.69 m·s−1 in the examined 15 years. Simultaneously, the distance of influence of SLB in summer was reduced by ∼30 km. The Weather Research and Forecasting model developed with high‐resolution land use data and variations in the sea surface temperature (SST) was applied to investigate the mechanisms leading to the weakening of SLB. The increasing SST led to a reduction in the temperature difference between sea and land, which was found to be the dominant factor driving the weakening of SLB in summer. The changes in the density and height of buildings due to urbanization altered the wind direction in the coastal areas, which in turn drive the reduction of the sea breeze during fall, while increased surface temperature at night in urban areas led to the reduction of the land breeze. With projections indicating ocean warming and increasing urbanization, the SLB will become weaker and occur less frequently in the future, probably leading to more frequent air pollution due to poor ventilation in coastal cities.

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“…According to Xing et al [8] and Pace et al [43], sea breezes circulation causes pollutant deposition at island locations. In addition to being influenced by local emissions, meteorological conditions also have a role in the variance in air pollution components [44]. As shown in Figure S1, Zhoushan, an island region, has a strong relative variation in wind direction, mainly from the southeast, south, and southwest.…”

Section: Vertical Profiles Of Aerosols No 2 and Hchomentioning

confidence: 99%

Differences in the Vertical Distribution of Aerosols, Nitrogen Dioxide, and Formaldehyde between Islands and Inland Areas: A Case Study in the Yangtze River Delta of China

Ou,

Hu,

Xing

et al. 2023

Remote Sensing

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Due to the difference of industrialization degree and meteorological conditions, there are obvious differences in the composition of air pollution between islands and inland areas. With Zhoushan (ZS) and Nanjing (NJ) representing islands and inland cities in the Yangtze River Delta, the differences in vertical distribution of atmospheric components were investigated. A combination of multi-axial differential optical absorption spectroscopy (MAX-DOAS), weather research and forecasting (WRF), and potential source contribution function (PSCF) models were used to obtain vertical distribution data for aerosols, nitrogen dioxide (NO2) and formaldehyde (HCHO), meteorological factors, and pollution sources in summer 2019. The findings indicate that, except for the aerosol extinction coefficient (AE), the atmospheric composition at the ZS site was not significantly stratified. However, the AE, NO2, and HCHO at NJ all displayed a decreasing trend with altitude. Here is the interesting finding that the ZS site has a higher AE value than the NJ site, while NJ displays higher NO2 and HCHO columns than the ZS site. This discrepancy was primarily attributable to Zhoushan City’s extremely low traffic emissions when compared to inland cities. In addition, HCHO in the YRD region was significantly affected by human activities. Analysis of potential pollution sources found that regional transport contributed to differences in atmospheric composition at different altitudes in different regions. Aerosols, NO2, and HCHO in Nanjing were significantly affected by transport in inland areas. Aerosols in Zhoushan were easily affected by transport in the Yellow Sea and East China Sea, and NO2 and HCHO were significantly affected by transport contributions from surrounding areas in inland areas. The study strongly suggests that land and sea breezes play an important role in the vertical distribution of aerosols over island regions.

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Diurnal variations in primary and secondary organic aerosols in an eastern China coastal city: The impact of land-sea breezes

Cited by 10 publications

References 86 publications

Traffic, marine ships and nucleation as the main sources of ultrafine particles in suburban Shanghai, China

Traffic, marine ships and nucleation as the main sources of ultrafine particles in suburban Shanghai, China

Weakened Sea‐Land Breeze in a Coastal Megacity Driven by Urbanization and Ocean Warming

Differences in the Vertical Distribution of Aerosols, Nitrogen Dioxide, and Formaldehyde between Islands and Inland Areas: A Case Study in the Yangtze River Delta of China

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