what changes to the climate does global warming cause
Global warming is already reshaping Earth’s climate by raising temperatures, intensifying extremes, shifting rainfall, melting ice, and raising sea levels, which then disrupt ecosystems, economies, and human health.
What global warming is doing to the climate
- Rising global temperatures
- Average surface temperatures are increasing, with more frequent and longer-lasting heatwaves on every continent.
* Hot extremes now occur more often and reach higher peaks than they did just a few decades ago.
- More extreme weather
- Heat fuels more intense storms, including heavier downpours and stronger tropical cyclones in many regions.
* Climate change is linked to more frequent and severe droughts and wildfires, especially in already dry or warming regions.
* Changes in the jet stream and storm tracks can lock in persistent patterns, like prolonged drought in some areas and long-lasting storms in others.
- Shifts in rainfall and water cycles
- Warmer air holds more moisture, which means overall global precipitation increases, but it falls unevenly.
* Wet regions and seasons tend to get wetter with more intense rainfall, while dry regions and seasons get drier, increasing flood and drought risks.
* In many places, longer hot dry spells are now punctuated by short but very heavy rain events.
- Melting ice and rising seas
- Glaciers, ice sheets, and sea ice are losing mass rapidly, particularly in the Arctic and mountain regions.
* Thawing permafrost in polar and high mountain areas destabilizes ground and infrastructure and can release more greenhouse gases.
* Sea level is rising due to thermal expansion of warmer oceans and melting land ice, increasing coastal flooding and erosion.
- Changing climate zones and ecosystems
- Climate zones are shifting poleward and upslope, forcing many species to move, adapt quickly, or face local extinction.
* Deserts are expanding, coral reefs are stressed by warming and acidifying oceans, and many ecosystems are under combined pressure from heat, drought, and human land use.
* Wildfire seasons are lengthening and expanding into areas that historically saw few large fires.
- Impacts on people and health
- Heatwaves increase illness and death, especially among older people, young children, and those with existing health issues.
* Climate-driven extremes (floods, storms, wildfires, droughts) are contributing to humanitarian emergencies and displacement.
* Between 2030 and 2050, climate change is expected to cause hundreds of thousands of additional deaths per year from undernutrition, malaria, diarrhoea, and heat stress.
Mini sections: key climate shifts
1. Heat and “new normal” weather
Think of the old idea of “normal weather” as a moving target. As greenhouse gases trap more heat, the baseline temperature rises and extremes become more common.
- More record-hot days and nights, fewer cold extremes.
- Higher odds that any given heatwave is stronger, longer, and covers a larger area.
2. Water: too much, too little, wrong time
Global warming turbocharges the water cycle.
- Heavier downpours, flash floods, and river floods where moisture converges.
- Prolonged drought and “megadroughts” where evaporation increases but rainfall lags, as seen in the American West.
- Snow turning to rain in some mountain regions, changing river flow timing and flood risk.
3. Ice, oceans, and coastlines
The cryosphere (frozen parts of the planet) is highly sensitive to warming.
- Arctic warming faster than the global average, with shrinking summer sea ice and thawing permafrost.
- Glacier loss in many mountain regions, altering water supplies and flood risk downstream.
- Rising seas encroaching on low-lying coastal cities, wetlands, and islands.
4. Ecosystems and living things
Climate change is a stress multiplier for nature.
- Many species shift their ranges toward poles or higher elevations to stay within suitable climates.
- Rapid changes outpace the ability of some plants and animals to adapt, increasing extinction risk.
- Forests face combined threats from heat, drought, pests, and fires.
5. Human systems and health
Climate impacts cascade into food, water, economies, and health.
- Crop yields can drop under heat and drought stress, while floods damage fields and infrastructure.
- Water scarcity intensifies in many dry regions, while others deal with more frequent flooding.
- Health systems face added pressure from heat stress, changing disease patterns, and climate-related disasters.
Overview table of major climate changes
| Climate change | What global warming does | Examples |
|---|---|---|
| Temperature | Raises average temperatures and heat extremes. | [5][9][1]More intense and frequent heatwaves. | [1][5]
| Rain & drought | Strengthens the water cycle, increasing contrasts between wet and dry. | [2][6][5]Heavier downpours, longer droughts, megadrought in U.S. West. | [2][6][5]
| Storms | Can increase storm intensity and alter tracks and persistence. | [7][3][5]Stronger tropical cyclones, persistent blocking patterns causing long droughts or wet spells. | [3][7][5]
| Ice & snow | Accelerates melting of glaciers, sea ice, and snow cover. | [9][5][8][1]Retreating mountain glaciers, shrinking Arctic sea ice, reduced snowpack. | [5][9][1]
| Sea level | Raises sea level through thermal expansion and ice melt. | [8][9][5]More frequent coastal flooding and erosion in low- lying areas. | [5][8]
| Ecosystems | Shifts climate zones and stresses biodiversity. | [9][1][8]Species moving poleward or upslope; higher extinction risk. | [8][9]
| Human health | Increases heat illness, disaster risks, and climate-sensitive diseases. | [10][1]Additional deaths from heat stress, undernutrition, malaria, and diarrhoea projected 2030–2050. | [10]
Information gathered from public forums or data available on the internet and portrayed here.