{"title":"波罗的海开阔海域表层水域叶绿素 a 浓度的变化情况","authors":"Malgorzata Stramska, Jaromir Jakacki","doi":"10.1016/j.oceano.2024.02.003","DOIUrl":null,"url":null,"abstract":"<div><p>In situ, satellite and reanalysis data from numerical models were used to study the characteristic features of Chl variability in the Baltic Sea. The analysis is focused on the years 2003–2020 when regular observations of ocean color with the MODIS AQUA are available. In the Baltic Sea, there is a pronounced annual cycle in physical conditions in the water column, driven by seasonal cycles in atmospheric forcing. The seasonal cycle of Chl concentration does not conform to the picture known from classical models, with low phytoplankton concentration when nutrients are low. In contrast, in the Baltic Sea, the concentration of Chl is high even during the summer months when nutrients are depleted. This can be explained by a continuous supply of nutrients by runoff from land, as well as by a significant contribution to primary production by phytoplankton able to survive in environment poor in dissolved nutrients. There is also a considerable interannual variability in Chl. There are many possible cause/effect interactions involved, but the data series are still too short to make clear which of them are the most important. The most striking event was a spring bloom in 2008.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"66 2","pages":"Pages 365-380"},"PeriodicalIF":2.6000,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0078323424000162/pdfft?md5=ee8d5ef8fce66f26cac31c170f55e1a9&pid=1-s2.0-S0078323424000162-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Variability of chlorophyll a concentration in surface waters of the open Baltic Sea\",\"authors\":\"Malgorzata Stramska, Jaromir Jakacki\",\"doi\":\"10.1016/j.oceano.2024.02.003\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In situ, satellite and reanalysis data from numerical models were used to study the characteristic features of Chl variability in the Baltic Sea. The analysis is focused on the years 2003–2020 when regular observations of ocean color with the MODIS AQUA are available. In the Baltic Sea, there is a pronounced annual cycle in physical conditions in the water column, driven by seasonal cycles in atmospheric forcing. The seasonal cycle of Chl concentration does not conform to the picture known from classical models, with low phytoplankton concentration when nutrients are low. In contrast, in the Baltic Sea, the concentration of Chl is high even during the summer months when nutrients are depleted. This can be explained by a continuous supply of nutrients by runoff from land, as well as by a significant contribution to primary production by phytoplankton able to survive in environment poor in dissolved nutrients. There is also a considerable interannual variability in Chl. There are many possible cause/effect interactions involved, but the data series are still too short to make clear which of them are the most important. The most striking event was a spring bloom in 2008.</p></div>\",\"PeriodicalId\":54694,\"journal\":{\"name\":\"Oceanologia\",\"volume\":\"66 2\",\"pages\":\"Pages 365-380\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0078323424000162/pdfft?md5=ee8d5ef8fce66f26cac31c170f55e1a9&pid=1-s2.0-S0078323424000162-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Oceanologia\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0078323424000162\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"OCEANOGRAPHY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oceanologia","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0078323424000162","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OCEANOGRAPHY","Score":null,"Total":0}
引用次数: 0
摘要
研究使用了原地、卫星和数值模式再分析数据来研究波罗的海 Chl 变化的特征。分析主要集中在 2003-2020 年间,这几年可以利用 MODIS AQUA 对海洋颜色进行定期观测。在波罗的海,水体物理条件有明显的年周期,由大气强迫的季节周期驱动。Chl 浓度的季节周期与经典模型中的情况并不一致,当营养物质较低时,浮游植物的浓度也较低。与此相反,在波罗的海,即使在营养物质耗竭的夏季,Chl 的浓度也很高。这可以解释为陆地径流源源不断地提供营养物质,以及能够在溶解营养物质贫乏的环境中生存的浮游植物对初级生产做出了重大贡献。Chl 的年际变化也相当大。这其中可能存在许多因果关系,但由于数据序列太短,还无法明确其中哪些是最重要的。最引人注目的事件是 2008 年春季的水华。
Variability of chlorophyll a concentration in surface waters of the open Baltic Sea
In situ, satellite and reanalysis data from numerical models were used to study the characteristic features of Chl variability in the Baltic Sea. The analysis is focused on the years 2003–2020 when regular observations of ocean color with the MODIS AQUA are available. In the Baltic Sea, there is a pronounced annual cycle in physical conditions in the water column, driven by seasonal cycles in atmospheric forcing. The seasonal cycle of Chl concentration does not conform to the picture known from classical models, with low phytoplankton concentration when nutrients are low. In contrast, in the Baltic Sea, the concentration of Chl is high even during the summer months when nutrients are depleted. This can be explained by a continuous supply of nutrients by runoff from land, as well as by a significant contribution to primary production by phytoplankton able to survive in environment poor in dissolved nutrients. There is also a considerable interannual variability in Chl. There are many possible cause/effect interactions involved, but the data series are still too short to make clear which of them are the most important. The most striking event was a spring bloom in 2008.
期刊介绍:
Oceanologia is an international journal that publishes results of original research in the field of marine sciences with emphasis on the European seas.