Ocean Dead Zones: Causes, Impacts and Solutions
Ocean dead zones are hypoxic areas where marine life cannot survive, caused primarily by nutrient pollution from agriculture and sewage. They disrupt ecosystems, harm…
Topic archive
Oceans
Role of seas in heat transport, carbon storage, and climate regulation.
How the Ocean Absorbs Heat From the Atmosphere
The ocean absorbs the vast majority of excess heat trapped by greenhouse gases, acting as Earth’s primary heat sink. Through physical processes like solar…
Ocean Heat Content vs Sea-Surface Temperature: Understanding the Difference
Ocean heat content (OHC) measures the total thermal energy stored in the ocean, while sea-surface temperature (SST) is the temperature of the ocean's surface…
Why Marine Heatwaves Are Becoming More Dangerous
Marine heatwaves—prolonged periods of unusually warm ocean temperatures—are increasing in frequency, intensity, and duration due to human-caused climate change. These events disrupt marine ecosystems,…
Ocean Acidification vs Ocean Warming: Understanding Two Major Climate-Driven Threats to the Sea
Ocean acidification and ocean warming are two distinct but interconnected consequences of rising atmospheric carbon dioxide. Acidification refers to the ongoing decrease in seawater…
How Nutrient Pollution Creates Coastal Dead Zones
Coastal dead zones are areas of water with extremely low oxygen levels (hypoxia) caused by excessive nutrient pollution, primarily nitrogen and phosphorus from human…
Hypoxia vs Anoxia in Aquatic Ecosystems: Definitions, Causes, and Consequences
Hypoxia and anoxia are conditions of low and zero dissolved oxygen, respectively, in water bodies. They occur when oxygen consumption by biological and chemical…
Deoxygenation: Why the Ocean Is Losing Oxygen
Ocean deoxygenation is the decline in dissolved oxygen levels in the world's oceans, driven primarily by rising water temperatures and nutrient pollution. Warmer water…
Why the Oceans Absorb Carbon Dioxide
The oceans absorb carbon dioxide from the atmosphere because of a natural chemical equilibrium: CO2 dissolves in seawater and reacts with water to form…