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Figure 1. Global Temperature over the Years

First the temperature gradually increased.

Then we know green house gas emission might be the key.

Then the sea level rised too, while sea ice melt away.

Then the extreme weather is the “new normal”.

The fact come to us, and there’s more behind. Climate change is proved with numerous records, hoever, the name “global warming” is a bit misleading today, while the weather system is complicated and unpredictable, The extreme weather are more frequently arriving in our life.

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Figure 2. Carbon Dioxide Through the Years

Greenhouse gases are gases that absorb and emit infrared radiation in the wavelength range emitted by Earth*. In short, gases such H2O CO2 CH4 N2O can reflect the heat transmission flow, by block the radiation of heat. The quantity of H2O are limited on Earth, but the CO2 are basically generated by human activities. Thus, for a long period of time, people are tracking the quantity of CO2 and CO2 atmospheric concentration. CO2 contribute about 9-26% to the greenhouse effect. And for H20, it is at about 36-72%**.

Figure 3. Global CO2 atmospheric concentration

Figure 4. Global Sea Level Trend

Last but not least, my question is:(3) Is sea ice melting under the influence of global warming? Sea ice extent provided by the National Snow and Ice Data Center (NSIDC) is available from 1979–2018 for the Northern Hemisphere, Southern Hemisphere, and Globe. From the visulization we can see that the extend of sea level is deteriorating since 1949.

Global warming has caused the shrinking and reduction of the ice caps covering the North and South poles on the planet. In the 21st century, the Arctic region is expected to increase an additional 8°C, along with an increase in winter temperatures. Overall, less sea ice means more ocean surface that will emit heat and lead to a warmer climate.

Loss of ice has many effects and one of the them is sea level rise. Satellite data suggests over the last 20 years, the Greenland ice sheet has lost 140 billion tonnes of ice per year.This has raised sea levels by about 7.8 millimetres – 12 per cent of total sea level rise in that time. The newest climate models project that by 2100, Greenland’s ice sheet could contribute four to nine centimetres to sea level. ### sea level (8761724, Grand Isle, LA)

Figure 5. Global Global Mean Sea Level (GMSL) Data