Learning Objectives
5 objectives- Understand the fundamental concepts of marine chemistry and the composition of seawater.
- Explain biogeochemical cycles and their significance in marine ecosystems.
- Analyze the causes and effects of ocean acidification and marine pollution.
- Evaluate the impact of climate change on the marine environment and explore mitigation strategies.
- Apply knowledge of analytical techniques to study marine chemical processes.
Content Outline
PreviewUnit 2403: Marine Chemistry and Environmental Processes
1. Introduction to Marine Chemistry
- Composition of seawater
- Major ions: Na+, Cl-, Mg2+, SO4 2-, Ca2+, K+
- Trace elements and dissolved gases
- Physical and chemical properties of seawater
- Salinity, temperature, density
- pH and buffering capacity
- Unique characteristics of the marine environment
- Ionic ratios
- Residence times of elements
2. Biogeochemical Cycling in the Ocean
- Overview of biogeochemical cycles
- Carbon cycle in marine systems
- Carbon reservoirs and fluxes
- Role of phytoplankton and marine organisms
- Ocean as a carbon sink
- Nitrogen cycle
- Nitrogen fixation, nitrification, denitrification
- Role of microbes
- Sulfur cycle
- Sulfate reduction and oxidation
- Importance for marine sediments and organisms
3. Ocean Acidification
- Causes of ocean acidification
- Increased CO2 absorption from atmosphere
- Chemical processes involved
- Carbonic acid formation
- Changes in carbonate ion concentration
- Consequences for marine life
- Effects on calcifying organisms (corals, mollusks)
- Impact on marine ecosystems and biodiversity
- Potential solutions and mitigation
- Reducing CO2 emissions
- Geoengineering approaches
4. Nutrient Dynamics in Marine Ecosystems
- Essential nutrients for marine life
- Nitrogen, phosphorus, silicon, iron
- Sources of nutrients
- Upwelling, river input, atmospheric deposition
- Nutrient cycling processes
- Regeneration, uptake, limitation
- Importance for primary productivity and ecosystem health
5. Contaminants in the Marine Environment
- Types of contaminants
- Heavy metals, persistent organic pollutants (POPs), microplastics
- Sources and pathways
- Industrial discharge, agricultural runoff, atmospheric deposition
- Effects on marine organisms
- Bioaccumulation and biomagnification
- Toxicological impacts
- Human health implications
6. Marine Pollution and Remediation
- Types of marine pollution
- Plastic pollution
- Oil spills
- Eutrophication
- Environmental and ecological consequences
- Strategies for remediation
- Physical removal
- Bioremediation
- Prevention measures
- Policy, education, sustainable practices
7. Climate Change and the Ocean
- Impacts of climate change on the marine environment
- Sea level rise
- Ocean warming
- Changes in marine biodiversity and distribution
- Effects on ecosystem services
- Adaptation strategies
- Marine protected areas
- Restoration ecology
- Mitigation strategies
- Carbon sequestration
- Sustainable fisheries management
8. Marine Sediments and Geochemistry
- Composition and classification of marine sediments
- Sediment deposition processes
- Terrigenous, biogenic, authigenic
- Diagenesis and chemical transformations
- Role of sediments in the global carbon cycle
- Carbon burial and storage
9. Analytical Techniques in Marine Chemistry
- Spectroscopy methods
- UV-Vis, Atomic Absorption, Fluorescence spectroscopy
- Chromatography
- Gas Chromatography (GC), Liquid Chromatography (LC)
- Mass spectrometry
- Isotope ratio mass spectrometry, Inductively Coupled Plasma MS
- Applications in marine chemistry research
- Trace element analysis
- Isotopic studies
- Pollutant detection
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