What do scientists disagree about global warming?

Answer 1

The fact is that no scientist claims the planet has not warmed. It has by well over 10 degrees C in the past 10,000 years. What some science experts claim is that man is causing this issue by the burning of fossil fuels.

Until 1996, almost no scientist even claimed this. What was claimed, in the beginning, is that man may be a contributor to global warming. The reason for this was the fact that man started recording temperatures globally around 1850.

Two things were occurring at the same moment in this time period. Technology was really starting to move forward. The Steam engine came out and man started using fossil fuels. This was also the lowest temp period of what is called the mini ice age. Thus temps started to rise again.

The result of these two things occurring at the same time meant we had two events whose data correlated. As technology moved forward so did the rise in temps. Over this time period we did see a rise in temp of about 0.66 degrees.

Two occurring at the same time does not honestly or logically mean they are connected though. (It also does not mean to say they are NOT connected). At this same time their was a correlated decrease in the number pirate ships. This does not imply a relationship their either (although it could). A decrease in pirates does not mean an increase in temps. They corresponded, but were not related. We needed to determine f temp was related to human use of fossil fuel. Further study was needed.

This created an industry known as the green movement. There are now hundreds of scientists that rely on this movement for their funding. Results now correlate to the side of the argument that provides the most funding. The conclusion of this argument does mean a serious loss of income to many science agencies like the GISS and the IPCC.

The facts do not support man being a sole or major cause of warming. Almost no scientist claims this. What many do claim is that man could be a contributor. We know that almost all of the current warming trend occurred prior to man burning his first chuck of coal. (11 degrees total warming in past 10,000 years and 0.66 warming since 1850).

Interesting little tidbit: Most of our 0.66 degrees of warming that we have seen since man did start using fossil fuels occurred prior to World War 2. The planet then spent a few decades cooling down during a period of high fuel use (1960's and 70's). So much so that the science experts believed that man was causing serious cooling of the planet. Since then 0.2 degrees of this warming has occurred over the 1938 level, despite a sharp spike in fossil fuel use.

We also know that 1998 was the record warmest year and the IPCC claims we will see less warming for awhile. The term is now called climate change to allow for further funding despite the fact we do not see any warming trends globally. This allows for us to debate localized trends and ignore data that proves the world has cycles.

What specific issues?

Some science groups claim a decrease in rain, others claim an increase

Some say water Rise of 30 feet, others 12 inches (over 150 years)

The bottom line is that no matter what changes you will see on the planet, some group will claim it to be caused by global warming.

A:Two thousand five hundred (2500) scientists from the United Nations' Intergovernmental Panel on Climate Change (IPCC) believe:

1. The global average surface temperature has risen 0.6 ± 0.2 °C since the late 19th century, and 0.17 °C per decade in the last 30 years.
2. "Most of the warming observed over the last 50 years is attributable to human activities", particularly from the greenhouse gases carbon dioxide and methane.
3. If the greenhouse gas emissions continue then the global warming will also continue. Temperatures may increase by 1.4 °C to 5.8 °C between 1990 and 2100. As well as temperature increase there will be increases in some types of extreme weather and a projected sea level rise of 9 cm to 88 cm, excluding "uncertainty relating to ice dynamical changes in the West Antarctic ice sheet". The impacts of global warming will be significantly negative.

There are some scientists who disagree:

1. Thirty thousand scientists believe global warming is not happening.
2. Twenty scientists think the IPPC's projections above may be inaccurate and are sueing them.
3. Twenty four scientists think the cause of global warming is unknown.
4. Thousands more of scientists believe that global warming will cause no harm to the planet.

See the list (and add to it) at the Wikipedia link below.

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There are a total of roughly 3500 individuals that worked with the IPCC report on climate change. 53 of these people were science experts, not 2500. Over 20 of these experts have sued the IPCC for changing the context of their statement and drawing invalid conclusions.

The IPCC has missed virtually every projection they have ever made AND the modeling programs they use have been unable to repeat current events from past climates. There are over 100 "black box" mods needed to make the modeling systems they have used work. With enough false variables any modeling system will give you whatever you desire. Elephants can fly with enough false information provided to your program.

Just to show you how massively non science based the politics of this issue has become. We even have Physicists resigning from the " American Physical Society " because the science does not support the idea of man induced global warming yet the debate has been settled according to politicians. (attached link)

Answer 2

Experts can agree. 97% of peer-reviewed climate scientists agree that global warming is caused by the human activity of deforestation and the burning of fossil fuels.