Intermediate plumes of low oxygen in the southeastern Baltic Sea

The spatial and temporal distribution of suspended matter in the southeastern part of the Baltic Sea was studied in the context of the transition from oxygenated to anoxic conditions. Semi-enclosed water bodies, such as the shallow Baltic Sea, play a key role in the global carbon cycle. Carbon-containing particles, both organic and inorganic, settle within the total suspended matter, making it important to understand the patterns of its distribution. The main sources of suspended matter in the southeastern part of the Baltic Sea are primary production and abrasion processes in the coastal zone. From the intensively mixed coastal zone, the suspended matter is transported to the Gdańsk Deep, where benthic nepheloid layers indicate complex sedimentation conditions, suggesting that this area cannot be considered a simple carbon sink. Intermediate nepheloid layers form during the seasonal shift from oxygenated to anoxic conditions, especially when local maxima of dissolved hydrogen sulfide detach from the seabed. The concentration of dissolved oxygen in the water varies significantly depending on the season, both in the surface and bottom layers, reaching its peak in winter and spring and its minimum in summer and autumn.

show abstract

Variability of saltwater flow in the Hoburg Channel, Baltic Sea: in situ measurements vs NEMO modelling

Paka,

Zhurbas,

Golenko

et al. 2024

jour

View full text Add to dashboard Cite

A half-year long time series of the bottom layer velocity measured in situ in the Hoburg Channel displayed seven-day oscillations of the saltwater flow. The flow was characterized by alterations of surges with the increase of northward velocity to approximately 0.2–0.3 m/s and blockages when the northward velocity vanishes or becomes small negative. The measured time series of the northward velocity component was surprisingly highly correlated with the simulation by NEMO reanalysis at the correlation coefficient of 0.82 and the 95 % confidence limits of 0.76–0.86. The seven-day oscillations were accompanied by almost synchronous oscillations of the southeast component of the wind vector. It can be considered convincing evidence that the seven-day oscillations in the saltwater flow were caused by wind forcing.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Intermediate plumes of low oxygen in the southeastern Baltic Sea

Cited by 3 publications

References 12 publications

Earth system changes in marginal seas

Earth system changes in marginal seas

Total suspended matter in the Gdansk deep at oxygenated / anoxic conditions in 2018—2023

Variability of saltwater flow in the Hoburg Channel, Baltic Sea: in situ measurements vs NEMO modelling

Contact Info

Product

Resources

About