冰封/非冰封期典型寒旱区湖泊底泥水界面氮磷原位同步变化特征

Key Points

• The research aims to investigate the changes in nitrogen and phosphorus concentrations at the sediment-water interface during frozen and non-frozen periods.
• In situ measurements using 2D micro-DGT and planar optodes at Ulansuhai Lake.
• Analysis of labile phosphorus, soluble reactive phosphorus, ammonium nitrogen, nitrite nitrogen, and nitrate nitrogen.
• Monitoring of pH and dissolved oxygen levels at the sediment-water interface.
• Significant spatial and temporal heterogeneity in nitrogen and phosphorus concentrations in sediments.
• Lower concentrations of nutrients during the frozen period compared to the non-frozen period.
• Nitrogen and phosphorus release during the non-frozen period increases the risk of water quality pollution.