极地研究

极地研究 ›› 2025, Vol. 37 ›› Issue (4): 757-774.DOI: 10.13679/j.jdyj.20240061

• 研究论文 • 上一篇    下一篇

基于COSMIC掩星观测的北极大气边界层高度特征研究

王芬1,常亮1,李黎黎2   

  1. 1上海海洋大学海洋科学与生态环境学院, 上海 201306;
    2华象科技(南京)有限公司, 江苏 南京 210019
  • 收稿日期:2024-06-24 修回日期:2024-10-16 出版日期:2025-12-30 发布日期:2026-01-12
  • 通讯作者: 常亮
  • 基金资助:
    国家自然科学基金面上项目资助

Characteristics of the Arctic planetary boundary layer height in COSMIC occultation data

WANG Fen1, CHANG Liang1, LI Lili2   

  1. 1College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China;
    2Huaxiang Technology (Nanjing) Ltd., Nanjing 210019, China
  • Received:2024-06-24 Revised:2024-10-16 Online:2025-12-30 Published:2026-01-12

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摘要：

基于折射率梯度法, 本文采用COSMIC掩星数据, 估计了2007—2019年的北极大气边界层高度(PBLH), 并利用全球无线电探空数据集(IGRA)进行了验证, 同时分析了北极PBLH的时空变化规律, 探讨了PBLH、逆温特性和低云之间的潜在联系。结果表明: (1)陆地和海洋上PBLH均在夏季最高, 其次是秋季和春季, 在冬季达到最小值; (2)贴地逆温(SBI)强度(频率)在冬、秋季比在春、夏季强(高), 而低悬逆温(EI)强度在冬、夏季强于春、秋季, 且EI频率在夏、秋季强于冬、春季; (3)陆地和海洋上PBLH与SBI和EI强度的月平均变化特征均相反, 其中陆地PBLH与低云云量的月平均变化特征均是在夏季最高(最多)而在冬季最低(最少), 但海洋PBLH和低云云量没有明显关系; (4)只有陆地的低云云量异常与PBLH异常在春季呈显著负相关, 在秋季呈显著正相关。在陆地上, 各季节低云云量异常与SBI强度异常均呈现出负相关性, 但与EI强度异常仅在夏季呈显著正相关。而在海洋上, 低云云量异常仅与SBI强度异常在秋季呈显著负相关。

关键词: 逆温, 低云云量, COSMIC掩星数据, 大气边界层高度, 北极地区

Abstract: On the basis of the refractive index gradient method, the Arctic planetary boundary layer height (PBLH) from 2007 to 2019 was estimated using radio occultation data from the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) satellite and was verified using Integrated Global Radiosonde Archive radiosonde observations. The spatiotemporal variation of the PBLH was analyzed, focusing on the potential relationship between PBLH, temperature inversion characteristics, and low cloud fraction (Low CF). The results are as follows: (1) PBLH over land and ocean was the highest in summer, second highest in autumn, third highest in spring, and the lowest in winter. (2) The intensity and frequency of Surface-based inversion (SBI) are higher in winter and autumn than in spring and summer, whereas the intensity of elevated inversion (EI) is higher in winter and summer than in spring and autumn. The frequency of EI is higher in summer and autumn than in winter and spring. (3) The monthly mean variations of PBLH and those of SBI and EI intensities over land and ocean exhibit opposite trends. The monthly variations of PBLH and Low CF cover over land are the highest in summer and the lowest in winter, but there is no obvious relationship between PBLH and Low CF over ocean. (4) Between the anomalies in Low CF amount over land and PBLH anomalies, there is a significant negative correlation in spring and a positive correlation in autumn. For each season over land, the anomalies of Low CF amount are negatively correlated with the anomalies of SBI intensity, but are only positively correlated with the anomalies of EI intensity in summer. However, over the ocean, anomalies of Low CF amount are only significantly negatively correlated with SBI intensity anomalies in autumn.

Key words: temperature inversions, low cloud fraction (Low CF), COSMIC occultation data, planetary boundary layer height, Arctic