The Xiamen Symposium on Marine Environmental Sciences (XMAS 2027)

	Nicolas Gruber Professor of Environmental Physics Department of Environmental Systems Science, ETH Zurich Nicolas Gruber is an environmental physicist whose research focuses on the marine carbon cycle, ocean biogeochemistry, and the ocean’s uptake and storage of anthropogenic carbon dioxide. He has developed important methods for quantifying human-derived CO₂ in the ocean and its role in the global carbon budget. In 2024, he received the American Geophysical Union’s Roger Revelle Medal for his contributions to marine carbon cycle research and the quantification of anthropogenic carbon uptake and storage in the ocean.
	Mak A. Saito Senior Scientist and Stanley Watson Chair Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution Mak A. Saito is a chemical oceanographer whose research focuses on trace metal biogeochemistry and microbial oceanography. His work investigates the role of metals in marine microbial metabolism, including the function of metalloenzymes and their influence on ocean biogeochemical cycles. He also integrates molecular and proteomic approaches to understand how microorganisms regulate elemental cycling in the ocean.
	Shubha Sathyendranath Merit Remote Sensing Scientist Plymouth Marine Laboratory Shubha Sathyendranath is a marine scientist with extensive expertise in marine optics, ocean-colour remote sensing, marine primary production, phytoplankton ecology, and the use of satellite observations in climate studies. Her work has advanced the development of remote-sensing algorithms and the application of ocean-colour data to understand marine ecosystems and climate variability. She has received major international honours, including the A.G. Huntsman Award for Excellence in the Marine Sciences, the UNESCO/IOC Pannikkar Memorial Medal, and an MBE.
	Daniel Sigman Dusenbury Professor of Geological and Geophysical Sciences, Department of Geosciences, Princeton University. Daniel M. Sigman is a geochemist and oceanographer whose research investigates the global cycles of biologically important elements, particularly nitrogen and carbon. He has developed widely used isotopic methods to study nitrogen in the environment and has applied these tools to understand past changes in atmospheric carbon dioxide, the dynamics of ice ages, and the ocean’s role in climate change. His work also includes isotopic analysis of organic matter preserved in fossils to reconstruct past environmental conditions. A MacArthur Fellow, he has received the American Geophysical Union’s James B. Macelwane Medal and the Science Innovation Award of the European Association of Geochemistry. He is a Fellow of the AGU and the Geochemical Society, and was elected to the U.S. National Academy of Sciences (NAS) in 2026.
	Shang-Ping Xie Roger Revelle Chair and Distinguished Professor of Climate Science Scripps Institution of Oceanography, University of California San Diego Shang-Ping Xie is a climatologist and oceanographer whose research focuses on ocean–atmosphere interactions and their role in climate variability and change. He has made major contributions to the understanding of El Niño–Southern Oscillation, monsoon systems, and global warming through both theoretical and modeling approaches. His work has significantly advanced knowledge of the coupled climate system and its variability on regional and global scales. He is internationally recognized for his contributions to climate science and was elected to the U.S. National Academy of Sciences (NAS) in 2026.