摘要
对流起沙是一种由热力对流湍流直接夹卷沙尘进入大气的起沙机制,由于其频繁发生,长期累积的沙尘排放贡献不可忽视。根据国内外研究现状,总结归纳对流起沙的发生机理和影响因素,介绍目前相关的参数化方案,并从发生条件和起沙通量等方面分析对流起沙与跃移起沙、尘卷风的异同。最后,对对流起沙的野外观测和参数化方案改进等方面提出建议:应加强对流起沙潜在活跃区的观测及比较不同沙源地对流起沙的特征,进一步构建土壤湿度、植被覆盖等影响因素的修正函数以提升模式模拟性能。
Convective turbulent dust emission(CTDE)is a new dust emission mechanism that thermal convective turbulent directly en⁃trains dust particles into the atmosphere.Due to frequent occurrence,the long-term contribution of CTDE cannot be ignored.In the light of the previous research,the mechanism and influencing factors of CTDE are summarized,the parameterization schemes of CTDE are introduced,and the similarities and differences between CTDE and saltation-bombardment and/or aggregation-disintegration dust emission as well as dust devil are compared in terms of occurrence condition and dust emission flux.Finally this paper provides a refer⁃ence for studying on CTDE and gives suggestions on field observation and improvement of parameterization for CTDE,including mea⁃suring CTDE events in potentially active areas,comparing the characteristics of CTDE between different dust sources,and building fur⁃ther correction functions of soil moisture and vegetation cover to improve the model performance.
作者
梁国豪
毛睿
SHAO Yaping
李晓岚
龚道溢
LIANG Guohao;MAO Rui;SHAO Yaping;LI Xiaolan;GONG Daoyi(Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education,Beijing Normal University,Beijing 100875,China;School of National Safety And Emergency Management,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China;Institute for Geophysics and Meteorology,University of Cologne,Cologne 50923,Germany;Shenyang Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110166,China;State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China)
出处
《干旱气象》
2023年第4期531-539,共9页
Journal of Arid Meteorology
基金
环境演变与自然灾害教育部重点实验室项目(2022-KF-04)
黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG-2220)共同资助。
关键词
对流起沙
跃移起沙
尘卷风
研究进展
convective turbulent dust emission
saltation-bombardment and/or aggregation-disintegration dust emission
dust devil
research progress
作者简介
梁国豪(1996-),男,山东枣庄人,硕士生,主要从事大气沙尘气溶胶研究。E-mail:lgh@mail.bnu.edu.cn;通信作者:毛睿(1980-),男,甘肃兰州人,教授,主要从事气候变化及其影响研究。E-mail:MR@bnu.edu.cn。
