Climate System

collapse Topic : Causes of Climate Change ‎(2)
Cyclical and Natural Changes
Human-Caused Changes
collapse Topic : Climate System ‎(12)
Atmospheric Circulation
Atmospheric Composition
Carbon Cycle
Climate Compared to Weather
Climate Feedbacks
Global Energy Balance
Greenhouse Effect
Ocean and Climate
Orbital Cycles
Regional Climates
Solar Radiation
Water Cycle
collapse Topic : Human Responses to Climate Change ‎(3)
Personal Responsibility
Risk Management
Social Values
collapse Topic : Impacts of Climate Change ‎(13)
Agricultural Changes
Economic Impacts
Ecosystem Changes
Extreme Weather
Freshwater Resources
Great Lakes Impacts
Melting Ice and Permafrost
Ocean Warming and Acidification
Plants and Animals
Public Health
Sea Level Rise
Surface Temperature Warming
collapse Topic : Measuring and Modeling Climate ‎(2)
Climate Modeling
Gathering and Measuring Climate Data

Water Cycle

The cycling of water is intimately linked with energy exchanges among the atmosphere, ocean, and land.

  • Water is necessary to sustaining life on Earth, and helps tie together the Earth's lands, oceans, and atmosphere into an integrated system. Precipitation, evaporation, freezing and melting and condensation are all part of the hydrological cycle - a never-ending global process of water circulation from clouds to land, to the ocean, and back to the clouds.

  • The impacts of climate change and variability on the quality of human life occur primarily through changes in the water cycle. As stated in the National Research Council's report on Research Pathways for the Next Decade (NRC, 1999): "Water is at the heart of both the causes and effects of climate change." (