乔约翰逊, 联合国大学地球科学系教授兼系主任, was recently selected as a lecturer for the prestigious 2024-2025 海洋发现讲座系列.
20多年来， 海洋发现讲座系列 (formerly the Distinguished Lecturer Series) has brought the exciting scientific results and discoveries of the International Ocean Discovery Program (IODP) and its predecessor programs to academic research institutions, 博物馆和水族馆.
“It is an honor to be selected as an Ocean Discovery Lecturer,约翰逊说。, who lecture is title Embrace diagenesis: The role of methane in carbon and sulfur sequestration in marine sediments. “I am eager to share some of my own research discoveries with others.”
约翰逊, whose research career began in the Ocean Drilling Program (ODP) and launched his career in marine geology, has continued to participate on International Ocean Discovery Program (IODP) expeditions that sustained 约翰逊 and his students' scientific careers for the last 20 years.
约翰逊 says scientific ocean drilling is the only way to access the spectacular archive of Earth history that is preserved in marine sediments. 他目前对自生矿物的研究, 沉积物沉积后形成的, shows these minerals serve as geological archives of paleo-pore water conditions that reflect changing environmental conditions through time. 在甲烷存在的情况下, the precipitation of pyrite and authigenic carbonate is enhanced, increasing the capacity of marine sediments to sequester carbon and sulfur.
“Tracking the formation and geochemical evolution of these minerals throughout the sediment column allows us to reconstruct the mechanisms that regulate, 变换, 并随着时间的推移将碳和硫封存在海洋中,约翰逊说。.
Since 1991, the lecture series has given more than 1,000 presentations to diverse audiences. 讲座主题广泛, 包括季风历史, 冰盖动力学, 沉积物成岩作用, 构造, 地球微生物学, 和更多的.
