文献类型：期刊文献

中文题名：基于WACCM6模式的平流层臭氧年际异常对南极春季海冰的影响

英文题名：Impacts of Interannual Stratospheric Ozone Anomalies on Antarctic Spring Sea Ice Based on WACCM6

作者：陈振锋[1];常舒捷[1];次仁[2];徐婷[3];何浩天[1]

机构：[1]广东海洋大学海洋与气象学院,广东湛江524088;[2]西藏大学生态环境学院,西藏拉萨850000;[3]深圳市气象局,广东深圳518040

年份：2026

卷号：46

期号：2

起止页码：94

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：北大核心2023、、北大核心

基金：国家自然科学基金面上项目(42475082);粤西热带海洋生态环境广东省野外科学观测研究站项目(2024B1212040008);粤西海洋动力生态灾害机理与预警报技术研究创新团队项目(2023KCXTD015);高水平大学重点学科海洋科学建设项目(231420003,080503032101);现代化海洋牧场人工智能创新研究团队项目(2024KCXTD042);广东省气象局科技项目(GRMC2023Q25)。

语种：中文

中文关键词：平流层臭氧;南极海冰;WACCM6;阿蒙森海-别林斯高晋海;威德尔海

外文关键词：stratospheric ozone;Antarctic sea ice;WACCM6;Amundsen-Bellingshausen Seas;Weddell Sea

中文摘要：【目的】分析南极春季(9―11月)臭氧年际异常对海冰变化的影响,为探究海冰变化的原因提供参考。【方法】基于全大气层大气化学气候模式WACCM6,采用时间序列分析、滑动t检验、高低臭氧年合成分析、滞后相关分析和显著性检验等方法,分析南极春季平流层臭氧年际异常及其对海冰热力过程和动力过程的影响机制。【结果与结论】WACCM6可以较好再现南极春季月平均臭氧柱总量的年际变化。合成结果表明,海冰变化主要出现在60°S―70°S的冰缘带。阿蒙森海-别林斯高晋海(ABS)和威德尔海变化最明显。HadISST结果与WACCM6模式结果一致。当春季平流层臭氧偏高时,ABS海区海冰减少,而威德尔海区海冰增加。这种变化主要由热力过程和动力过程共同作用。在热力过程方面,平流层臭氧增加会改变辐射加热结构,这一变化会使高纬平流层温度升高。同时,冰缘带附近的能量发生变化,ABS海区地表能量增加,近地层气温升高,因此海冰形成受到抑制,并且融化加快。威德尔海区情况相反,地表能量减少,气温降低,所以海冰更容易维持和增加。在动力过程方面,平流层温度升高会对应高纬位势高度增加,造成西风减弱,同时极涡变弱,在高纬地区形成下沉气流。该信号向下传到对流层,并改变风场。同时,阿蒙森低压和近地层风场发生变化。风场变化会通过Ekman输送改变海洋水平输运,从而进一步影响海冰分布。因此,ABS海区海冰减少,而威德尔海区海冰增加。

外文摘要：【Objective】This study aims to analyze the impact of Antarctic spring(from September to November)ozone interannual variability on sea ice,and to provide a reference for investigating the causes of sea ice variations.【Methods】Based on the Whole Atmosphere Community Climate Model version 6(WACCM6),time series analysis,sliding t-test,composite analysis of high-and low-ozone years,lag correlation analysis,and significance testing were used to analyze the interannual variability of Antarctic spring stratospheric ozone and its impact mechanism on the thermal and dynamical processes of sea ice.【Results and Conclusion】WACCM6 can reproduce the interannual variability of monthly average Antarctic spring total column ozone well.Composite analysis shows that sea ice changes associated with ozone anomalies mainly occur in the marginal ice zone(60°S―70°S).The response is most pronounced in the Amundsen-Bellingshausen Seas(ABS)and the Weddell Sea.The HadISST results agree well with the WACCM6 simulations.When stratospheric ozone is higher than normal in spring,sea ice decreases in the ABS region and increases in the Weddell Sea.This change is caused by the combined action of thermal and dynamical processes.From a thermal perspective,an increase in stratospheric ozone alters the radiative heating structure,leading to a rise in stratospheric temperatures at high latitudes.At the same time,there is a change in energy near the ice edge zone,with an increase in surface energy in the ABS area and a rise in near surface temperatures.As a result,sea ice formation is suppressed and melting accelerates.The situation in the Weddell Sea area is the opposite,with reduced surface energy and lower temperatures,making it easier to maintain and increase sea ice.In terms of dynamical processes,an increase in stratospheric temperature is associated with enhanced geopotential height at high latitudes,which weakens the westerlies and leads to a weakening of the polar vortex,thereby inducing downward motion in high latitude regions.This signal is transmitted downwards to the troposphere and changes the wind field.At the same time,changes occurred in the Amundsen low-pressure system and the near surface wind field.wind field changes can alter ocean horizontal transport through Ekman transport,thereby affecting sea ice distribution.Therefore,the sea ice in the ABS area has decreased,while the sea ice in the Weddell Sea area has increased.