作为气候多变性指标的对流层上部风场特征

IF 0.9 4区 地球科学 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES
A. F. Nerushev, K. N. Visheratin, R. V. Ivangorodsky
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引用次数: 0

摘要

摘要--本文介绍了对 2007-2021 年期间欧洲第二代气象卫星 8 号-气象卫星 11 号静止气象卫星 SEVIRI 辐射计视场内北半球自由大气层风场特征时空变化的研究结果。据指出,在大西洋上空观测到了最大风速以及风速模数的最大月平均异常和季节异常。显示了区域平均风速模数的时变特征,即在 2015-2017 年之交,趋势符号由正变负。同时,从 2007 年到大西洋、整个研究区域和欧亚大陆(包括俄罗斯联邦的欧洲领土)趋势符号变化点的时间间隔内,正线性趋势与零显著不同,概率超过 95%,负趋势仅在大西洋显著。季节性风速变化与北极海冰面积和对流层 500 和 200 百帕高度的温度特征高度相关。根据对风速变化与主要气候特征和大尺度大气过程之间关系的分析,提出了与全球变暖有关的北极海冰面积加速减少对自由大气层风速的影响方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Characteristics of the Wind Field in the Upper Troposphere as Indicators of Climatic Variability

Characteristics of the Wind Field in the Upper Troposphere as Indicators of Climatic Variability

Abstract—The paper presents the results of a study of spatiotemporal variability of the characteristics of the wind field in the free atmosphere of the Northern Hemisphere in the SEVIRI radiometer field of view of European geostationary meteorological satellites of the second generation Meteosat 8Meteosat 11 in the time interval 2007–2021. It is noted that the maximum wind speeds, as well as the maximum average monthly and seasonal anomalies of the wind speed modulus, are observed over the Atlantic. A feature of the temporal variability of the area-averaged wind speed modulus is revealed, which consists in a change in the sign of the trend at the turn of 2015–2017 from positive to negative. At the same time, positive linear trends in the time intervals from 2007 to the points of a change in the sign of the trend over the Atlantic, the entire region under consideration and Eurasia, including the European territory of the Russian Federation, are significantly different from zero with a probability of more than 95% and the negative trend is significant only over the Atlantic. A high correlation was noted in the area of seasonal wind speed variations with the area of Arctic sea ice and temperature characteristics of the troposphere at levels of 500 and 200 hPa. Based on the analysis of the relationship between wind speed variability and the main climatic characteristics and large-scale atmospheric processes, a scheme is proposed for the effect of the accelerating reduction in the area of Arctic sea ice associated with global warming on wind speed in the free atmosphere.

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来源期刊
CiteScore
1.40
自引率
28.60%
发文量
56
审稿时长
6-12 weeks
期刊介绍: Izvestiya, Atmospheric and Oceanic Physics is a journal that publishes original scientific research and review articles on vital issues in the physics of the Earth’s atmosphere and hydrosphere and climate theory. The journal presents results of recent studies of physical processes in the atmosphere and ocean that control climate, weather, and their changes. These studies have possible practical applications. The journal also gives room to the discussion of results obtained in theoretical and experimental studies in various fields of oceanic and atmospheric physics, such as the dynamics of gas and water media, interaction of the atmosphere with the ocean and land surfaces, turbulence theory, heat balance and radiation processes, remote sensing and optics of both media, natural and man-induced climate changes, and the state of the atmosphere and ocean. The journal publishes papers on research techniques used in both media, current scientific information on domestic and foreign events in the physics of the atmosphere and ocean.
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