极地研究2018，Vol.30Issue(2)：132-139,8.DOI:10.13679/j.jdyj.20170042
北极扬马延岛大气边界层高度的气候特征分析
CLIMATOLOGICAL CHARACTERISTICS OF PLANETARY BOUNDARY LAYER HEIGHT AT JAN MAYEN, ARCTIC
摘要
Abstract
Based on 43 years' data of twice-daily radiosonde observations, this study investigated the temporal variability of the planetary boundary layer height (PBLH) at Jan Mayen, Norway, based on the Bulk Richardson Number method. It was found that the PBLH during daytime was higher than at night for most months. In addition, the monthly averaged PBLH in summer (around 262 m) was found much lower than in spring or winter (about 600 m). The PBLH variations showed good anticorrelation with surface relative hu-midity. Because of the influence of the Gulf Stream, the annual temperature difference at the Jan Mayen sta-tion is quite small and the surface temperature shows little seasonal variation. Surface relative humidity ex-hibits considerable seasonal variation, with a maximum value in summer and a minimum value in winter. The higher humidity in summer causes higher latent heat flux that restrains the convective process in the boundary layer, which leads to the lower summer PBLH. The long-term changes in PBLH at the studied sta-tion also revealed some interesting results. The annual mean PBLH decreased from 1973 to 1988, increased rapidly between 1988 and 1995, and then fluctuated between 500 and 600 m after 1995.关键词
大气边界层高度/扬马延岛/总体理查逊数Key words
Planetary boundary layer height/Jan Mayen/Bulk Richardson Number引用本文复制引用
张祥,张叶晖,韩靖博,张乐,史婉蓉..北极扬马延岛大气边界层高度的气候特征分析[J].极地研究,2018,30(2):132-139,8.基金项目
江苏省高等学校大学生创新创业训练计划项目(201610300016Z)、江苏省自然科学基金项目(BK20161531)、淮河流域气象开放研究基金(HRM201604)以及南京信息工程大学本科生优秀毕业论文(设计)支持计划项目(2018BSZC033)资助 （201610300016Z）
