Carbon transport and acidification of the north Pacific subtropical mode water-- 科学与技术前沿论坛

Carbon transport and acidification of the north Pacific subtropical mode water

报告简介：

The formation and movement of North Pacific Subtropical Mode Water (NPSTMW) play a crucial role in carbon absorption, transport, and storage. Through field observations and carbon isotope tracer analysis, we reveal the process of anthropogenic carbon transport via mode water circulation and finds that the acidification of mode water has accelerated over the past decade. The primary driver is the cooling of source water in the mode water formation region, which enhances the accumulation of anthropogenic carbon. Within the range of 137°E-149°E, all mode water shows evidence of anthropogenic carbon accumulation and accelerated acidification, largely controlled by mode water's role in carbon transport. Furthermore, carbon isotope tracer analysis indicates that the accelerated accumulation of anthropogenic carbon in mode water can be traced back to the surface waters of the formation region. The consistency of this accumulation rate in both vertical and horizontal dimensions suggests that mode water retains the fingerprint of anthropogenic carbon throughout its formation and transport. These findings deepen our understanding of carbon transport, storage, and acidification mechanisms in the North Pacific, providing a scientific basis for assessing the ecological effects of ocean acidification in this region.

报告人简介：

祁第

Di Qi, Ph.D. supervisor, has long been engaged in research on ocean carbon sinks, acidification, and related marine biogeochemical processes. He has been selected as a Distinguished Professor under the national "CJ Incentive Program" for major talent projects, a Young Top Talent under the National WR Program, a Distinguished Professor at Jimei University, and the Director of the Polar and Ocean Research Institute. He also serves as an expert on the Fifth Advisory Group of the National Natural Science Foundation of China's Shared Voyage Program, a member of the Expert Panel for National Key R&D Programs, a board member of the China Polar Alliance for Universities, a council member of the China Polar Young Scientists Association, and a member of the Global Ocean Acidification Observing Network (GOA-ON) China team. As the first or corresponding author, he has published over 30 SCI papers in journals such as Science, Nature Climate Change (cover article), Geophysical Research Letters, and Global Biogeochemical Cycles. His research achievements were selected as one of the "Top 10 Marine Science and Technology Advances in China in 2017" and were featured in the Frontier Science: China's Top 10 Scientific Advances of 2022 collection. He has received the Special Prize of the National Marine Engineering Science and Technology Award (ranked second), the Fujian Youth May Fourth Medal, and the title of "Most Beautiful Science and Technology Worker" in Fujian Province. He has led multiple national and provincial-level projects, including the National Key R&D Program, National Talent Programs, National Natural Science Foundation projects, the Fujian Provincial Major Undergraduate Teaching Reform Project, and the Fujian Outstanding Youth Fund.