1990 至 2021 年瓜纳巴拉湾(里约热内卢)的平均海平面、潮汐成分和浪涌情况

IF 3.5 3区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES
Rodrigo Tecchio, Danilo Couto de Souza, Matheus Bonjour Laviola da Silva, Marcia Carolina de Oliveria Costa, Ricardo de Camargo, Joseph Harari
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引用次数: 0

摘要

瓜纳巴拉湾位于里约热内卢大都会区,是南半球最大的城市沿海地区之一,由于拥有多个港口,海上交通十分繁忙。这些设施受到海平面波动的影响,并受到大气和天文力量的影响,因此需要进行同步和气候分析,包括气象和天文潮汐现象。这项研究旨在评估 1990 年至 2021 年期间潮汐成分和相对平均海平面(MSL)的演变情况,以及大气对极端气象潮汐事件的影响,其中 MSL 超过±2 和 ±3(±29.98 和 ±44.97 厘米)个标准偏差。结果表明,主要潮汐成分(M 2、S 2、O 1、M 4、Q 1、K 1、K 2 和 N 2)尽管数量较小,但在振幅和相位的增加方面显示出积极的趋势。就相对 MSL 而言,观测到的增幅为 0.30 厘米-年-1,与卫星高度计全球序列的估计值和气候模式预测值一致。通过压力和风场分析,确定了与极端事件相关的大气系统的季节变化和演变模式。在正激浪的情况下,由于大陆上空存在高压中心,而海洋上空存在低压中心,从西南方向沿巴西南/东南海岸吹来非常强烈的风,导致海水堆积。反过来,负浪涌是由于海洋上空出现了反气旋,产生了与里约热内卢海岸平行的东北风,诱发了埃克曼输送,降低了海平面。因此,瓜纳巴拉湾的极端海平面事件并不是由当地力量引发的,而是取决于巴西南/东南沿海风的时间持续性和风向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Mean sea level, tidal components and surges in Guanabara Bay (Rio de Janeiro) from 1990 to 2021

Mean sea level, tidal components and surges in Guanabara Bay (Rio de Janeiro) from 1990 to 2021

Guanabara Bay, located in the Metropolitan Region of Rio de Janeiro, one of the largest urban coastal areas in the Southern Hemisphere, is subject to intense maritime traffic due to the presence of several ports. These facilities are affected by sea level fluctuations, influenced by atmospheric and astronomical forces, which motivates synoptic and climatological analysis, including meteorological and astronomical tidal phenomena. This study aimed to assess the evolution of tidal components and the relative mean sea level (MSL) between 1990 and 2021, as well as the atmospheric influence on extreme meteorological tide events, in which the MSL exceeded ±2 and ±3 (±29.98 and ±44.97 cm) standard deviations. The results have shown that, albeit small, the main tidal components ( M 2 , S 2 , O 1 , M 4 , Q 1 , K 1 , K 2 and N 2 ) indicated positive trends in the increase of amplitude and phase, despite the small quantities. For the relative MSL, an increase of 0.30 cm·year−1 was observed in agreement with estimates from global series from satellite altimeters and climate model predictions. Pressure and wind field analyses led to the identification of seasonal variability and the pattern of evolution of atmospheric systems associated with extreme events. In the case of positive surges, very intense winds from the SW, extending along the S/SE Brazilian coast, are caused by the presence of a high-pressure centre over the continent and low-pressure centres over the ocean, leading to water piling up. In turn, negative surges are caused by the presence of an anticyclone over the ocean, generating NE winds parallel to the coast of Rio de Janeiro, inducing Ekman transport and lowering the sea level. Therefore, the extreme sea level events in the Guanabara Bay are not triggered by local forces, but rather depend on the temporal persistence and direction of winds along the S/SE Brazilian coast.

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来源期刊
International Journal of Climatology
International Journal of Climatology 地学-气象与大气科学
CiteScore
7.50
自引率
7.70%
发文量
417
审稿时长
4 months
期刊介绍: The International Journal of Climatology aims to span the well established but rapidly growing field of climatology, through the publication of research papers, short communications, major reviews of progress and reviews of new books and reports in the area of climate science. The Journal’s main role is to stimulate and report research in climatology, from the expansive fields of the atmospheric, biophysical, engineering and social sciences. Coverage includes: Climate system science; Local to global scale climate observations and modelling; Seasonal to interannual climate prediction; Climatic variability and climate change; Synoptic, dynamic and urban climatology, hydroclimatology, human bioclimatology, ecoclimatology, dendroclimatology, palaeoclimatology, marine climatology and atmosphere-ocean interactions; Application of climatological knowledge to environmental assessment and management and economic production; Climate and society interactions
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