How do scientists collect climate change data? Any suggestiong very welcome, thank you.
As other people have mentioned, they drill ice cores in Greenland and Antarctica and measure the gases trapped in bubbles and the isotopes of oxygen that the ice is made out of. They look at mud layers in lakes; they take measurements of temperature all over the world, not just using thermometers but also using the time it takes GPS signals to travel through the atmosphere and sound to travel through the ocean; they look at long term records of flowers blooming; they use satellites to measure how much infrared radiation the Earth is emitting and how much sunlight is being reflected; they measure the pH of the ocean and its total carbon content and on and on.

And unlike what one answerer said, they make this data freely available so that everyone can use and understand it.

In the short run, they compare statistics from year to year, decade to decade. Weather statistics only go back about a hundred and fifty years though.

For longer range, they must depend of what are called admiralty reports... sailors kept decent records of weather conditions in these.

In the even longer run, we can study evidence in tree rings and also in core samples of ice found at the poles, high altitude glaciers and other long term ice fields.

i agree with a previous answer.

They pull it out of their ***.

Or from algore%26#039;s ears.

By the way, whenever these Globalwarming NAZIS get data that does not agree with their pre-conceived bias, they simply don%26#039;t share this data with anyone.
This is why you must never trust any of these scientists who are biased. None of their %26quot;science%26quot; should be taken seriously, because it;s fatally flawed from the outset.

don%26#039;t listen to the Global Warming Nazis. Their %26quot;final solution%26quot; is to turn us all into lampshades. Or, since lamps are not globally friendly, their aim is to turn us all into soap

A couple different places

They have ice cores, which have air bubbles trapped in the ice which are like little samples of the atmosphere from thousands of years ago.

Tree rings are another thing they look at.

They also look at weather recording stations around the world.

There are quite a few more but I can%26#039;t remember them all.

They drill out large core samples from the polar ice cap. The air-bubbles trapped in the ice can tell the scientists a lot about carbon levels, oxygen, etc, and their effect on the environment.

The short hand is;
Rising tides, Declining Ice-bergs, constant uprise in the temperature and the common decline of earths natural species. Written not Quoted

typically by studying the ice from the Antartic.. they have been able to go back to the time of the Dinosaurs and discovered there was much more oxygen back then- which is how/why they got so big...

They pull it out of their ***, duh