Distribution and dynamics of biogenic sulfur in the northeast Subarctic Pacific : insights from new and refined analytical techniques ...

• Main Author: Herr, Alysia Elizabeth
• Format: Text
• Language: English
• Published: University of British Columbia 2018
• Subjects: Subarctic
• Online Access: https://dx.doi.org/10.14288/1.0375753; https://doi.library.ubc.ca/10.14288/1.0375753

The northeast subarctic Pacific (NESAP) is a globally important source of the climate-active gas dimethylsulfide (DMS), yet the processes driving DMS variability across this region are poorly understood. This thesis aims to provide insight into the distribution and cycling of DMS and related sulfur compounds dimethylsulfoxide (DMSO) and dimethylsulfoniopropionate (DMSP) by examining new concentration data, together with biological cycling rates and related oceanographic variables. Chapter 2 examines the distribution of DMS at various spatial scales across contrasting oceanographic regimes of the NESAP. We present a new data set of high spatial resolution DMS measurements across hydrographic frontal zones, together with key environmental variables and biological rate measurements. We combine these new data with existing observations to produce a revised summertime DMS climatology for the NESAP. Our results suggest the presence of two distinct DMS cycling regimes corresponding to microphytoplankton-dominated ...