Antarctic haze phenomena at Syowa Station, Antarctica: seasonal features and impacts on atmospheric chemistry

IF 8.4 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2025-08-01 DOI:10.1038/s41612-025-01176-9

Keiichiro Hara, Kano Osato, Masanori Yabuki, Kazuo Osada, Naohiko Hirasawa, Masataka Shiobara, Takashi Yamanouchi

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Abstract

Despite the cleanest conditions, haze phenomena were observed at Syowa Station, Antarctica. During our measurements period of 1997–2022, 113 haze events were identified. General characteristics of Antarctic haze such as duration and horizontal scale were obtained from haze event analyses. Antarctic haze near the surface was identified mostly during May–October. Seasonal features of the Antarctic haze appearance were that they were maximal in August and were associated with strong wind conditions and sea-ice extent. Aerosol enhanced layers (AELs) appeared in the surface – free troposphere (ca. 4 km). AELs were identified also in mid-April – October. Furthermore, surface ozone (O₃) was depleted during the Antarctic haze. The O₃ depletion amount was maximal during August and minimal during polar night (June). Findings suggest that Antarctic haze phenomena make important contributions to atmospheric oxidative capacity and cloud processes in the Antarctic troposphere.

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南极Syowa站的南极雾霾现象：季节特征及其对大气化学的影响

尽管天气最干净，但在南极的Syowa站仍观察到雾霾现象。在我们1997-2022年的测量期间，确定了113次雾霾事件。通过雾霾事件分析，得到了南极雾霾的一般特征，如持续时间和水平尺度。南极近地表雾霾主要发生在5 - 10月。南极雾霾出现的季节特征是8月最大，与大风条件和海冰范围有关。气溶胶增强层（AELs）出现在无表面对流层（约4公里）。在4月中旬至10月期间也发现了急性呼吸道感染。此外，在南极雾霾期间，地表臭氧（O3）被耗尽。O3耗损量在8月最大，极夜（6月）最小。研究结果表明，南极雾霾现象对南极对流层大气氧化能力和云过程有重要贡献。

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

期刊介绍： npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.