摘要
本研究使用我国新一代火星大气模式GoPlanet-Mars(简称GoMars)V1在火星年MY24~MY36时段内的基础试验数据,在对模式模拟性能进行评估后,重点分析了MY24沙尘季北半球阿卡迪亚平原沙尘光学厚度(DOD)与大气热动力过程的演变特征。结果表明,在沙尘季的沙尘活动峰值时段,南北半球共有6个沙尘暴活动大值区;在强上升运动作用下,火星大气沙尘质量混合比在90~100 Pa达到极大值,约3.0×10^(-5)kg/kg;随着沙尘暴活动的增多增强,其对区域的火表温度、对流层大气温度均具有明显的影响,其中火表日最低温度对DOD增大的响应近乎同步,在DOD极大值前后夜间火表最低温度的增幅最大可达30 K,而火表温度日较差则下降50 K,且火表日最高温度对DOD的响应呈现滞后特征;沙尘活动峰值时段沙尘含量的显著增加增强了火星大气全球范围的经向环流。本工作为我们理解火星正常年份北半球沙尘季沙尘暴活动高值区DOD及大气热动力过程的演变特征增加了新的认识。
This study utilizes the baseline experimental data from the Chinese new generation of Martian atmospheric model,GoPlanet-Mars(referred to as GoMars)V1 during Martian Years(MY)24~36.After evaluating the model's simulation performance,we focus on analyzing the evolution characteristics of dust optical depth(DOD)and atmospheric thermodynamic processes in the Arcadia Planitia of the northern hemisphere during the dust season of MY24.The results show that during the dust storm peak activity periods,there are six major dust storm active zones distributed across both hemispheres.Under strong upward motion,the dust mass mixing ratio in the Martian atmosphere reaches its maximum(3.0×10^(-5) kg/kg)at 90~100 Pa.As the dust storm activity intensifies,it significantly affects both surface temperature and tropospheric atmospheric temperature.Notably,the daily minimum surface temperature responds nearly synchronously to increased DOD,with the nighttime surface temperature increase reaching up to 30 K around the peak DOD periods.Meanwhile,the diurnal surface temperature range decreases by 50 K,with the daily maximum surface temperature showing a lagged response to DOD variations.During peak dust activity periods,the substantial increase in atmospheric dust content enhances the global-scale meridional circulation on Mars.This work provides new insights into the evolution characteristics of DOD and atmospheric thermodynamic processes in the northern hemisphere's dust storm active zones during typical Martian years.
作者
刘鸿波
邓世雅
程旋
李艺苑
董理
刘娟娟
严若婧
刘帅
刘明宇
普业
LIU Hongbo;DENG Shiya;CHENG Xuan;LI Yiyuan;DONG Li;LIU Juanjuan;YAN Ruojing;LIU Shuai;LIU Mingyu;PU Ye(State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Science,University of Chinese Academy of Sciences,Beijing 100049,China;Deep Space Exploration Laboratory,Beijing 100195,China;National Key Laboratory of Earth System Numerical Modeling and Application,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;College of Marine Sciences,University of Chinese Academy of Sciences,Qingdao 266400,China;Chongqing Meteorological Bureau,Chongqing 401147,China)
出处
《第四纪研究》
北大核心
2025年第4期850-861,共12页
Quaternary Sciences
基金
天问三号任务关键技术攻关项目(批准号:TW3006)
国家自然科学基金项目(批准号:42475135)
中国科学院大气物理研究所十四五基本科研业务费支持项目共同资助。
