Jason Smith

Postdoctoral Fellow, MBARI

Biological and environmental controls on nitrogen remineralization in the ocean

Tuesday, June 9, 2015
Pacific Forum—11:00 a.m.

The biological reprocessing of organic nitrogen into dissolved inorganic forms, termed remineralization, is an important component of the marine nitrogen and carbon cycles. Inorganic nitrogen (e.g. nitrate) availability commonly limits primary production in the ocean, therefore, where and how much nitrogen remineralization takes place in the water column has important feedback on oceanic CO2 uptake and carbon sequestration. Yet, our understanding of the factors that determine the magnitude and vertical distribution of nitrogen remineralization rates is severely lacking. Recent molecular, isotopic, and biogeochemical advancements now allow us to study nitrification, the terminal step in nitrogen remineralization and a significant source of N2O to the atmosphere, with unprecedented spatial and temporal resolution. This seminar will focus on recent experimental and observational efforts to identify the primary controls over nitrification in the sea and to establish new ways to locate and track subsurface remineralization ‘hot spots’ in global data sets or for targeted observation and experimentation with autonomous platforms.

Next: June 10—Jay Harman

Products

Data repository
Data policy
What is happening in Monterey Bay today?
Central and Northern California Ocean Observing System
Chemical data
Ocean float data
Slough data
Mooring ISUS measurements
M1 ISUS CTD Data Display
Southern Ocean Data
Mooring data
M1 Mooring Summary Data
M1 ADCP (CeNCOOS)
M1 Asimet
M1 Download Info
M1 EMeter
M1 Fluorometer (CeNCOOS)
M1 GPS Location
Molecular and genomics data
ESP Web Portal
Seafloor mapping
Upper ocean data
Spatial Temporal Oceanographic Query System (STOQS) Data
Tide prediction
Image gallery
Video library
Seminars
Previous seminars
David Packard Distinguished Lecturers
Research software
Video Annotation and Reference System
System Overview
Knowledgebase
Installation
Annotation Interface
Video Tape User Guide
Video File User Guide
Installation
Annotation Glossary
Query Interface
Basic User Guide
Advanced User Guide
Results
Installation
Query Glossary
FAQ
VARS Publications
Oceanographic Decision Support System
MB-System seafloor mapping software
MB-System Documentation
MB-System Announcements
MB-System Announcements (Archive)
How to Download and Install MB-System
MB-System Discussion Lists
MB-System FAQ
Matlab scripts: Linear regressions
Introduction to Model I and Model II linear regressions
A brief history of Model II regression analysis
Index of downloadable files
Summary of modifications
Regression rules of thumb
Results for Model I and Model II regressions
Graphs of the Model I and Model II regressions
Which regression: Model I or Model II?
Matlab scripts: Oceanographic calculations
Matlab scripts: Sound velocity
Visual Basic for Excel: Oceanographic calculations
Educational resources
MBARI Summer Internship Program
2017 MBARI Summer Internship Program
2017 Intern Projects and Mentors
Education and Research: Testing Hypotheses (EARTH)
EARTH workshops
2016—New Brunswick, NJ
2015—Newport, Oregon
2016 Satellite workshop—Pensacola, FL
2016 Satellite workshop—Beaufort, NC
EARTH resources
EARTH lesson plans
Lesson plans—published
Lesson plans—development
Lesson drafts—2015
Lesson drafts—2016 Pensacola
Center for Microbial Oceanography: Research and Education (C-MORE) Science Kits
Publications
Sample archive