Climate Change and the Sea: A Major Disruption in Steady State and the Master Variables

Area of Science:

• Environmental Science
• Oceanography
• Climate Science

Background:

• Industrial revolution led to increased burning of fossil fuels, disrupting natural carbon, nitrogen, and sulfur cycles.
• Elevated atmospheric greenhouse gases have caused global warming and altered ocean chemistry (temperature, pH, pε).
• Widespread use of nitrogen and phosphorus fertilizers has resulted in coastal hypoxia and low dissolved oxygen.

Purpose of the Study:

• To highlight the significant impact of human activities on Earth's elemental cycles and marine environments.
• To underscore the consequences of altered atmospheric and oceanic conditions on marine ecosystems.
• To propose actions and alternatives for mitigating climate change and its effects on the sea.

Main Methods:

• Analysis of historical industrial emissions and their impact on elemental cycles.
• Assessment of changes in key oceanic variables (temperature, pH, pε) and their effects.
• Review of ecological impacts on coral reefs, fisheries, and marine ecosystems.

Main Results:

• Human activities have rivaled natural elemental cycles, disrupting atmospheric and oceanic steady states.
• Ocean warming, acidification, and deoxygenation threaten marine life and ecosystems.
• Degradation of coral reefs, fisheries, and overall marine biodiversity is evident.

Conclusions:

• Massive alteration of Earth's systems by human actions diminishes vital marine ecosystems.
• Implementing specific actions and alternatives can mitigate climate change impacts on oceans.
• Sustainable practices are essential for the future of both humans and marine ecosystems.