Homogenization of Surface Wind Speed Over Global Land From 1973 to 2022

IF 3.8 2区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES
Zhengtai Zhang, Kaicun Wang
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引用次数: 0

Abstract

Although homogenization has been widely applied to historical records of surface air temperature, the homogenization of surface wind speed (SWS) data remains limited likely because the SWS is more sensitive to local environment, making it difficult to find suitable reference from nearby stations. To address this issue, we have developed a method for calculating geostrophic wind speed, which has been used as the reference to perform homogeneity detection and adjustment for the SWS at stations in China. Here, the method is applied to homogenize annual mean SWS from more than 3,600 stations over global land from 1973 to 2022. Although further confirmation from the metadata is required, the homogenization significantly reduces statistical inhomogeneity (p = 0.01) in the raw SWS. The results show that about 35% of the global stations exhibit inhomogeneities in SWS, and this phenomenon is more pronounced over North America and Europe. The homogenization has a minimal impact on the global average trend of SWS, but has major impacts on regional trends, especially in Europe, Asia, and Oceania. Compared with the raw SWS, the trend of homogenized SWS from 1973 to 2022 changed from −0.052 to −0.027 m s−1 per decade in Europe, and from −0.066 to −0.033 m s−1 per decade in Asia. In Oceania, the homogenization decreases the SWS trend from 0.24 to 0.081 m s−1 per decade. This study emphasizes the importance of considering the homogeneity of SWS data when analyzing its changes, particularly at regional scales.

1973 - 2022年全球陆地地面风速的均一化
虽然均质化技术已广泛应用于地表气温的历史记录,但由于地表风速对局地环境更为敏感,难以从附近台站找到合适的参考资料,因此对地表风速数据的均质化仍然存在局限性。为了解决这一问题,我们开发了一种计算地转风速的方法,并将其作为中国台站SWS均匀性检测和平差的参考。在这里,该方法应用于1973年至2022年全球陆地上3600多个站点的年平均SWS均质化。虽然需要从元数据中进一步确认,但均匀化显著降低了原始SWS的统计不均匀性(p = 0.01)。结果表明,全球约35%的台站在SWS上表现出不均匀性,这种现象在北美和欧洲地区更为明显。均一化对全球SWS平均趋势的影响较小,但对区域趋势的影响较大,特别是在欧洲、亚洲和大洋洲。与原始SWS相比,1973 - 2022年均匀化SWS的变化趋势在欧洲为−0.052 ~−0.027 m s−1 / 10年,在亚洲为−0.066 ~−0.033 m s−1 / 10年。在大洋洲,均一化使SWS趋势从0.24 m s−1 / 10减小到0.081 m s−1 / 10。本研究强调了在分析SWS数据变化时考虑其同质性的重要性,特别是在区域尺度上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres Earth and Planetary Sciences-Geophysics
CiteScore
7.30
自引率
11.40%
发文量
684
期刊介绍: JGR: Atmospheres publishes articles that advance and improve understanding of atmospheric properties and processes, including the interaction of the atmosphere with other components of the Earth system.
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