中国福建省 2010 至 2023 年全球导航卫星系统推算的大气可降水水汽的时空特征和变异性

IF 2.9 3区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS
Weihua Pan, Shuiying Wang, Chuhan Su, Yongjiang Yu, Ling Li, Shenheng Weng
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引用次数: 0

摘要

大气可降水水汽(PWV)是影响降水和大气环境的重要因素。为定量研究中国福建省大气可降水水汽的时空分布及其特征,基于 2010-2023 年全球导航卫星系统(GNSS)资料、地面气象观测资料、气象探测资料和ERA5 资料,分析了福建省大气可降水水汽的日变化和季节变化。此外,还利用经验正交函数(EOF)、Mann-Kendall 检验和滑动 t 检验评估了月度 PWV 的时空特征。结果表明,地基 GNSS PWV 数据能够揭示福建上空 PWV 的分布和变化。具体而言,脉搏波速度的日分布随时间变化显著,东部沿海地区的脉搏波速度普遍高于西部山区。脉动脉值的季节变化特征与大气环流变化一致,夏季脉动脉值最大,其次是春季、秋季和冬季。此外,EOF 空间模式显示,东部沿海地区和内陆山区的 PWV 分布不同。脉动脉宽(PWV)的振荡强度从西北向东南加强,相应的脉动脉宽(PWV)时间序列显示出明显的季节变化。观测到的降水量与 PWV 不一致,更多受到当地地形和热力条件的影响。Mann-Kendall 检验和滑动 t 检验表明,过去 13 年福建上空的 PWV 没有发生突变,但未来有可能发生突变。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Spatio-Temporal Characteristics and Variability of GNSS-Derived Atmospheric Precipitable Water Vapor From 2010 to 2023 in Fujian Province, China

Spatio-Temporal Characteristics and Variability of GNSS-Derived Atmospheric Precipitable Water Vapor From 2010 to 2023 in Fujian Province, China

Atmospheric precipitable water vapor (PWV) is a crucial factor affecting precipitation and the atmospheric environment. To quantitatively investigate the spatio-temporal distribution and characteristics of the PWV in Fujian, China, its diurnal and seasonal variations are analyzed based on the global navigation satellite system (GNSS) data from 2010 to 2023, ground meteorological observations, meteorological sounding data and ERA5 data. Moreover, the spatio-temporal characteristics of the monthly PWV are assessed by using the empirical orthogonal function (EOF), the Mann-Kendall test and the sliding t-test. The results indicate that the ground-based GNSS PWV data is able to reveal the distribution and variation of PWV over Fujian. Specifically, the diurnal distribution of the PWV varies remarkably with time, and the PWV in the eastern coastal areas is generally higher than in the western mountainous areas. The seasonal variation characteristics of the PWV are consistent with the atmospheric circulation variations, with the largest amount of PWV in summer, followed by spring, autumn and winter. Moreover, the EOF spatial modes show that the PWV distributions are different in the eastern coastal areas and inland mountainous areas. The oscillation intensity of the PWV strengthens from the northwest to the southeast, and the corresponding time series of the PWV displays apparent seasonal variations. The observed precipitation is inconsistent with the PWV and is more affected by local terrain and thermodynamic conditions. The Mann-Kendall test and the sliding t-test indicate that the PWV over Fujian has not undergone abrupt changes during the past 13 years, but there is a possibility of sudden changes in the future.

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来源期刊
Earth and Space Science
Earth and Space Science Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
5.50
自引率
3.20%
发文量
285
审稿时长
19 weeks
期刊介绍: Marking AGU’s second new open access journal in the last 12 months, Earth and Space Science is the only journal that reflects the expansive range of science represented by AGU’s 62,000 members, including all of the Earth, planetary, and space sciences, and related fields in environmental science, geoengineering, space engineering, and biogeochemistry.
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