Geological Research Division, Korea Institute of Geoscience and Mineral Resources, Gwahang-no, Yuseong-gu, Daejeon, Republic of Korea.
Mar Environ Res. 2012 Oct;81:83-9. doi: 10.1016/j.marenvres.2012.08.007. Epub 2012 Aug 27.
Diatom fossils from core sediments and living diatoms from water samples of Notoro Lagoon in northern Japan were examined to evaluate natural climate effects on lagoon environmental changes. In 1974, the artificial inlet was excavated. Immediately after, the anoxic bottom water in Notoro Lagoon began to disappear due to an increasing water exchange rate. However, chemical oxygen demand (COD) in the bottom water of Notoro Lagoon gradually increased, with fluctuations, during the last 30 years. In addition, the dominant diatom assemblages in Notoro Lagoon shifted to ice-related and spring bloom taxa after the excavation. The dominant taxa of each year in the sediment core were also strongly related to the timing of lagoon ice melting. This is because the COD in Notoro Lagoon was affected by the deposited volume of blooming diatoms, which was controlled by the duration of ice cover and the timing of ice discharge to the Okhotsk Sea likely due to an air pressure pattern change over the northern North Pacific like the Pacific Decadal Oscillation (PDO).
对日本北部能登罗湖区沉积物中的化石硅藻和水样中的活体硅藻进行了研究，以评估自然气候对泻湖环境变化的影响。1974 年，人工入口被挖掘出来。此后，由于水交换率的增加，能登罗湖区缺氧底层水开始消失。然而，在过去的 30 年里，能登罗湖区底层水的化学需氧量（COD）逐渐增加，且有波动。此外，在挖掘之后，能登罗湖区的优势硅藻组合转向与冰相关和春季水华的分类群。此外，每年在沉积核心的优势分类群也与泻湖冰融化的时间密切相关。这是因为能登罗湖区的 COD 受到了水华硅藻沉积量的影响，而这又受到冰盖持续时间和冰排放到鄂霍次克海的时间的控制，这可能是由于北太平洋北部的气压模式变化，如太平洋年代际振荡（PDO）。
