The 10 global indicators of climate change by NOAA

According to NOAA (National Oceanic and Atmospheric Organization of the United States), there is no doubt warms the Earth's climate. To gather data from NOAA and other organizations to process and combine to make a change, a time series of global average temperature has irrefutable evidence of warming global temperatures. These changes are futures observations of natural phenomena in the world, such as rising sea reconfirmation flowering plants in early spring, melting glaciers, warming of surface temperatures of lakes and reduced Arctic ice (to name a few).

To come to the conclusion that our climate is guaranteed in a warming of NOAA, several things, as they call indicators of global climate change.

1. Surface temperature, elevation

The global surface temperature data of air temperature on land surface temperature. Although fluctuations occur from year to year, in a period of global warming seen with the 10 warmest years have all occurred in the last twelve years.

2. Surface temperature increase of the United States

The revolt of the Earth's surface temperature is also felt in the United States is not at odds with the expectations of global warming.

3. Sea levels rises

Over the past 100 years sea level has risen at a rate of 1.7 mm / year. Since 1993, the rate of 3.5 mm / year is accelerated. The increase in ocean heat is a major cause of rising sea levels.

4. Ocean temperatures are rising

Ocean waters are warming. Also in line with the sea level, thus increasing the ocean. 2009 was the fourth warmest year for sea water, after 1988, 2003 and 2005.

5. Northern Hemisphere snowed that cover annual retreats

The last decade has been an average annual snowfall of retirement. Since the spring and summer 70, when most affected by this warming trend.

6. Glacier shrinks

The total volume of glaciers is back at a rapid pace. The process of contraction has been around for over a century, with a more rapid decline in the last 10 years. The disappearance of glaciers affect sea levels but also the availability of water in some regions such as Asia or South America.

7. Extreme weathers events are increasing

Over the past four decades, extreme weather events (natural disasters) have increased dramatically.

8. Global climate models show the human effect on climate change

Observed by global climate models, the warming of half a century, the warming trend is not explained by natural factors to be alone but they are mainly caused by human factors.

9. Increase concentrations of carbon dioxide in the atmosphere

Changed over the past 800,000 years CO2 levels in the atmosphere of 170 ppm (parts per million) to 300 ppm. In May 2010, CO2 levels have reached 392.94 ppm, the highest concentration in the last 800,000 years.

10. The sun's energy has not increased

The quantity of solar energy that reaches the top of our atmosphere has not increased, while global temperatures are rising on Earth. This means that it is extremely unlikely that the sun will be part of global warming cheek.