Research

The global carbon, phosphorus, oxygen, sulfur, and nitrogen cycles are fundamental processes regulating the movement and availability of these crucial elements essential for life on Earth. Each cycle plays a pivotal role in maintaining elemental balance within Earth surface systems and spheres, influencing biological processes, climate, and environmental sustainability.

At the Biogeochemistry Laboratory, IGG-CAS, our commitment lies in investigating the mechanisms and evolution of global biogeochemical cycles (C, P, O, S, and N). Through empirical data collection, cultivation experiments, extensive data analysis, and biogeochemical modeling, our research primarily focuses on understanding the operational mechanisms and controlling factors governing these cycles. Additionally, we explore the regulatory mechanisms of the global carbon cycle on Earth's climate throughout Earth history. Currently, our laboratory concentrates on three main research directions:

The evolution of global C, P, O, S and N cycles

Understanding how the carbon, phosphorus, oxygen, sulfur, and nitrogen cycles have evolved over time is crucial for comprehending their current dynamics and predicting future changes. This research direction encompasses tracing the historical variations in these elemental cycles across geological timescales. It involves gathering data from ancient rocks and ODP samples, along with conducting numerical simulations using either existing or newly developed models of varying complexities.

Mechanism of chemical weathering on land

Chemical weathering processes serve as Earth's thermostat, exerting a significant influence on nutrient availability. This research direction centers on examining the factors that impact weathering rates, including climatic conditions, vegetation cover, and the properties of rocks and soils, utilizing big data and advanced mathematical models. Understanding these mechanisms is pivotal for predicting climate changes and managing global elemental cycles.

Organic carbon cycle in soils and sediments

Soils and sediments function as crucial repositories for organic carbon, wielding a pivotal influence on the global carbon and oxygen cycles. This research direction concentrates on a comprehensive exploration of the intricate interplay among organic matter, microbial activity, and minerals within these environments. It involves scrutinizing processes like microbial-driven organic matter decomposition and the diverse protective effects that different minerals offer to organic matter. Understanding the destiny of organic carbon within soils and sediments holds significance not only for evaluating carbon storage potential but also for forecasting climate shifts. Additionally, it sheds light on the historical role of organic carbon cycles in oxygenating the Earth's atmosphere.