Seidnitzer Selene Nahir, Getino Mamet Leandro Nicolás, Soria Gaspar
Universidad Nacional de la Patagonia San Juan Bosco, Boulevard Brown 3051, Puerto Madryn, Chubut, U9120ACD, Argentina.
Centro para el Estudio de Sistemas Marinos, CCT CONICET-CENPAT, Boulevard Brown 2915, Puerto Madryn, Chubut, U9120ACD, Argentina.
Mar Environ Res. 2025 Feb;204:106914. doi: 10.1016/j.marenvres.2024.106914. Epub 2024 Dec 17.
Windstorm patterns associated with beach strandings of the commercially important Tehuelche scallop, Aequipecten tehuelchus, in San José Gulf, Patagonia, were analyzed to understand the windstorms recurrence given their potential impact on the dynamics of the resource. Although the phenomenon of scallop strandings has been recognized for a long time, the lack of environmental records has made it difficult to thoroughly study the meteorological conditions that trigger these events. The availability of reanalysis data has the potential to address this data gap; however, its feasibility must first be validated. To address this, the first step was to characterize and compare hourly wind intensity (m/s) and direction (degrees) data from the fifth-generation global climate reanalysis (ERA5), provided by the European Centre for Medium-Range Weather Forecasts, with in situ wind data for the 2013-2020 period. The study focused on wind conditions during reported Tehuelche scallop strandings along the northern coast of the gulf. Subsequently, a historical search for southerly windstorms with characteristics similar to those responsible for past strandings was conducted using the ERA5 database, covering the period from 1950 to 2023. Overall, ERA5 accurately captured the dates, durations, intensities, and directions of southerly windstorms at high temporal resolution (hourly), though with a slight tendency to underestimate wind intensities of higher winds. The estimated mean annual frequency of ERA5-detected southerly windstorms with intensities higher than 11 m/s was 5.4 storms per year, with durations ranging from 12 to 74 h. These windstorms can occur throughout the year, with an increased frequency and duration during winter. ERA5 proved to be a valuable tool for characterizing windstorms, complementing in situ data and providing insight into past stranding events where no observational data were available.
对巴塔哥尼亚圣何塞湾具有商业重要性的特维尔切扇贝（Aequipecten tehuelchus）海滩搁浅事件相关的风暴模式进行了分析，以了解风暴的重现情况，因为它们可能会对该资源的动态产生影响。尽管扇贝搁浅现象早已为人所知，但由于缺乏环境记录，很难全面研究引发这些事件的气象条件。再分析数据的可用性有可能填补这一数据空白；然而，其可行性必须首先得到验证。为此，第一步是将欧洲中期天气预报中心提供的第五代全球气候再分析（ERA5）的每小时风速（米/秒）和风向（度）数据，与2013 - 2020年期间的现场风速数据进行特征描述和比较。该研究聚焦于海湾北岸报告的特维尔切扇贝搁浅期间的风况。随后，利用ERA5数据库对1950年至2023年期间与过去搁浅事件具有相似特征的南风风暴进行了历史搜索。总体而言，ERA5能够以高时间分辨率（每小时）准确捕捉南风风暴的日期、持续时间、强度和风向，不过对于较高风速的强度有轻微低估的趋势。ERA5检测到的强度高于11米/秒的南风风暴的估计年均频率为每年5.4次，持续时间从12小时到74小时不等。这些风暴全年都可能发生，冬季频率和持续时间会增加。ERA5被证明是表征风暴的宝贵工具，它补充了现场数据，并为过去没有观测数据的搁浅事件提供了见解。
