System boundary
Keep organism, habitat, water mass and human pressure at distinct scales, then show explicitly how the proposed mechanism links them. Relate that field focus to “Four stops to start” before moving to “What the ocean does for Earth.”
Learning path 01
Ocean Basics
Build the vocabulary and physical intuition needed to read an ocean map, a species guide, or a climate dataset.
Last updated 2026-09-28 · Reviewed against listed sources
Move from the ocean as an Earth system to depth, chemistry, circulation, and living communities. Each stop points to something you can inspect or calculate.
Four stops to start
01
What the ocean does for Earth
Heat storage, carbon exchange, weather, and habitat are connected processes.
02
From surface to seafloor
Depth changes light, pressure, temperature, oxygen, and the kinds of life that can persist.
03
Temperature and salinity
Small density differences help organize currents and move heat around the planet.
04
Read the evidence
Separate observations, estimates, model outputs, and unresolved questions.
Continue with a practical page
Interactive tool
Ocean zone identifier
Enter a depth and see the named zone, pressure, light, and typical adaptations.
Open resource →Field guidePhytoplankton
Meet the microscopic producers that connect light, carbon, and food webs.
Open resource →BackgroundOcean currents
A library page for the large-scale movement of heat, salt, and water.
Open resource →Ocean field notebook / paths
Field plan: Ocean Basics
Build the vocabulary and physical intuition needed to read an ocean map, a species guide, or a climate dataset.
Measurements to log
Pair a second measurement of the same process with a time series with an explicit baseline. Record depth, location, date, units and sampling effort so a change in conditions is not mistaken for a change in the ocean.
Change signal
Compare “What the ocean does for Earth” with “From surface to seafloor.” Decide whether the pattern represents exposure, response or recovery, and state the observation period needed to tell them apart.
Open the pre-dive checklist
- Which variable can be observed directly?
- Which mechanism needs a second instrument or comparison site?
- What result from the page sources and linked institutional records would change the planned conclusion?