the water planet
Welcome! I'm excited to explore the cosmos and our own backyard with you. To help tailormake this journey, I'd love to know what sparked your curiosity.
Are you interested in learning more about Earth specifically, or are you more interested in the search for 'water worlds' in deep space?
I want to focus on Earth's oceans and climate.
It is great to focus on our home planet! Since you want to dive into Earth's oceans and climate, let's start by looking at why Earth is uniquely crowned the "" and how that massive liquid shield sets the stage for our global weather.
Your path
Earth's Oceans and Climate System
Water Worlds Beyond Earth (Comparison)
The Mighty Hydrosphere
When we look at Earth from space, its iconic blue color comes from the hydrosphere—the combined mass of water found on, under, and above our planet's surface.
About 71 percent of Earth's surface is covered by oceans. This vast body of water acts like a giant solar panel, absorbing heat from the Sun and distributing it around the globe. Without this fluid thermostat, our world would experience wild, uninhabitable temperature swings, much like our dry neighbor Mars.
To see how this water is distributed, let's look at the breakdown of Earth's total water reserves.
| Water Source | Percentage of Total Earth Water |
|---|---|
| Oceans (Saltwater) | ~96.5% |
| Glaciers & Ice Caps | ~1.74% |
| Groundwater | ~1.7% |
| Lakes, Rivers, & Atmosphere | ~0.06% |
Even though freshwater in lakes, rivers, and clouds seems abundant to us, it makes up just a tiny fraction of a percent of Earth's total water. The oceans are the true powerhouses driving our climate.
Are you ready to explore how these massive oceans move heat around the planet, or would you like to test your understanding of Earth's water distribution first?