Seasonal Water Mass Mixing and Nutrient Dynamics Study

This research article examines the seasonal variations in water mass structure and nutrient dynamics in Kongsfjorden, an Arctic fjord. The study focuses on how the composition of water masses changes seasonally due to mixing among Atlantic Water, Polar Surface Water, and glacial meltwater. It details the impact of these changes on nutrient concentrations, particularly during spring and summer. In spring, the presence of Modified Atlantic Water promotes vertical mixing, resulting in uniform nutrient distribution. Conversely, summer conditions lead to significant stratification and nutrient depletion in the upper layers due to the influence of glacial meltwater. The article employs a nutrient anomaly approach to quantify biological impacts on nutrient levels, revealing substantial biological uptake of nutrients during the growing season. The findings highlight the transition from nutrient-rich conditions in spring to nutrient-limited conditions in summer, emphasizing the importance of understanding these dynamics in the context of climate change and its effects on Arctic ecosystems.