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Science begins with observations. All of these observations are interrelated. In the future if you want to claim I am connecting the fires in the Western states of the US to climate change please use this post.Trying to insinuate these wildfires in the west are caused by global warming is slanderous and false shame on you.
Global Temperature rise
The planet's average surface temperature has risen about 1.62 degrees Fahrenheit (0.9 degrees Celsius) since the late 19th century, a change driven largely by increased carbon dioxide and other human-made emissions into the atmosphere.4 Most of the warming occurred in the past 35 years, with the six warmest years on record taking place since 2014. Not only was 2016 the warmest year on record, but eight of the 12 months that make up the year — from January through September, with the exception of June — were the warmest on record for those respective months. 5
This is surely related to droughts and fires. By itself it doesn't "cause" the fires as we haven't risen to spontaneous combustion, but with increased heat you can get more evaporation, more drying and dry vegetation will burn easier.
Warming Ocean
The oceans have absorbed much of this increased heat, with the top 700 meters (about 2,300 feet) of ocean showing warming of more than 0.4 degrees Fahrenheit since 1969.6
This is related to the size, frequency and damage from storms. We can expect bigger, stronger and more frequent hurricanes, tropical storms, tropical depressions and rain events.
Glacial Retreat
Glaciers are retreating almost everywhere around the world — including in the Alps, Himalayas, Andes, Rockies, Alaska and Africa.8
This has a direct impact on these fires. As glacial ice retreats from highlands there is less melt water in the spring and summer causing the forest to dry.
Decreased Snow Cover
Satellite observations reveal that the amount of spring snow cover in the Northern Hemisphere has decreased over the past five decades and that the snow is melting earlier.9
This has a direct impact on these fires. As snow cover decreases there is less melt water in the spring causing the forest to dry.
Declining Arctic Sea Ice
Both the extent and thickness of Arctic sea ice has declined rapidly over the last several decades.11
This also has an impact on ocean currents and weather patterns. It also results in a negative feedback loop because ice reflects the sunlight out into space and ocean water absorbs the sunlight as heat. As Ice sheets shrink the warming effect of the sun on the Earth increases.
Extreme Events
The number of record high temperature events in the United States has been increasing, while the number of record low temperature events has been decreasing, since 1950. The U.S. has also witnessed increasing numbers of intense rainfall events.12
Keeping track of the number, size, intensity of these events gives us a way to gauge the impact that rising temperature globally is having on our weather. By definition if a "100 year event" starts happening every 10 years the climate has changed.
Evidence | Facts – Climate Change: Vital Signs of the Planet
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