The Distribution of Cadmium and its Isotopes in the Subarctic Pacific

Authors

• J. M. Malloy, The Ohio State University
• H. R. Hunt, University of South Florida
• M. Sieber, University of South Florida
• S. Takano, Kyoto University
• H. Obata, The University of Tokyo
• T. M. Conway, University of South Florida

Document Type

Poster Session

Publication Date

1-10-2026

Abstract

• Cadmium (Cd) is a bioactive trace element that can act as a micronutrient, driving large scale chemical processes like photosynthesis and cellular respiration [1,2].
• The uptake of major nutrients is limited by dissolved iron (Fe) availability in high nutrient low chlorophyll (HNLC) surface regions like the subarctic Pacific [2,4].
• Upwelling of Cd-rich deepwater is a Cd source, in addition to riverine, atmospheric, and anthropogenic inputs [1].
• Dissolved cadmium isotopic compositions (δ114Cd) provide insight into the biogeochemical processes controlling Cd distributions throughout the water column, including biological uptake in surface waters, regeneration, and water mass mixing at depth.
• Here we present the first cross basin study of both Cd and δ114Cd from the Japanese GEOTRACES GP02 zonal transect of the subarctic Pacific.

Rights Information

Terms of use for work posted in Scholar Commons.

Scholar Commons Citation

Malloy, J. M.; Hunt, H. R.; Sieber, M.; Takano, S.; Obata, H.; and Conway, T. M., "The Distribution of Cadmium and its Isotopes in the Subarctic Pacific" (2026). Making Waves REU. 10.
https://digitalcommons.usf.edu/making-waves_reu/10