JapanFlux2024 JP-Nuf Nagoya University Forest

To quantify the carbon sequestration capacity of urban and rural forests in specific climate zones.We compared the carbon sequestration of two temperate deciduous forests located in Nagoya and Toyota.The forest in Nagoya University represents an urban forest, while the one in Toyota represents a rural forest.The two cities differ in area and population density, with Nagoya having a total area of 327 km2 and a population density of 6503 persons/km2 , and Toyota having 919 km2 and a population density of 426 persons/km2 .The Nagoya University Experiment Forest has urban characteristics, while the Toyota Experiment Forest has rural characteristics. Due to their geographic proximity, the solar climates are considered similar, and any differences are thought to result from factors related to urbanization. Both forests were similar in age, approximately 70-80 years, with the evergreen coniferous red pine ( Pinus densiflora Siebold & Zucc.) being the dominant species.The red pine population gradually declined due to Pinus densiflora.After the pine disease, natural vegetation recovered. Over the past approximately 35-40 years, the red pine has been gradually replaced by the deciduous broadleaf oak ( Quercus serrata Murray ), which has become the dominant species.The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.为量化特定气候区城乡森林的固碳能力，本研究对比了位于名古屋与丰田的两处温带落叶林的固碳水平。其中名古屋大学（Nagoya University）实验林代表城市森林，丰田实验林则代表乡村森林。两座城市在面积与人口密度上差异显著：名古屋总面积327 km²，人口密度达6503人/km²；丰田总面积919 km²，人口密度仅426人/km²。名古屋大学实验林具有城市生态特征，而丰田实验林具备乡村生态特征。由于两地地理邻近，其太阳辐射气候条件被认为基本一致，观测到的固碳差异应归因于与城市化相关的各类因素。两处林分的林龄相近，约为70至80年，优势树种均为常绿针叶林赤松（*Pinus densiflora* Siebold & Zucc.）。赤松种群因赤松相关因素逐渐衰退，在遭遇松树病害后自然植被逐步恢复。在过去约35至40年间，赤松逐渐被落叶阔叶树枹栎（*Quercus serrata* Murray）替代，后者现已成为优势树种。本研究采用涡度协方差系统（eddy covariance system），对感热、潜热与二氧化碳的湍流通量进行了观测。