Scientists come to opposite conclusions about the causes of recent climate change depending on which datasets they consider. For instance, the panels on the left lead to the conclusion that global temperature changes since the mid-19th century have been mostly due to human-caused emissions, especially carbon dioxide (CO2), i.e., the conclusion reached by the UN IPCC reports. In contrast, the panels on the right lead to the exact opposite conclusion, i.e., that the global temperature changes since the mid-19th century have been mostly due to natural cycles, chiefly long-term changes in the energy emitted by the Sun.About 615,000,000 results (0.30 seconds)
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How We Know Today's Climate Change Is Not Natural
https://blogs.ei.columbia.edu/2017/04/.../how-we-know-climate-change-is-not-natural/Apr 4, 2017 - Last week, the House Committee on Science, Space and Technology, chaired by climate contrarian Lamar Smith, R-Texas, held a hearing on ...
How do we know global warming is not a natural cycle? | Climate ...
www.climatecentral.org/library/faqs/how_do_we_know_it_is_not_a_natural_cycleNov 7, 2009 - Answer. If the Earth's temperature had been steady for millions of years and only started rising in the past half century or so, the answer would ...
How do we know? - Evidence | Facts – Climate Change: Vital Signs of ...
https://climate.nasa.gov/evidence/Vital Signs of the Planet: Global Climate Change and Global Warming. ...Not only was 2016 the warmest year on record, but eight of the 12 months that make up .... the Earth's natural greenhouse effect and suggested that slight changes in the ...
Human fingerprints on climate change rule out natural cycles
https://www.skepticalscience.com/global-warming-natural-cycle.htmHowever, internal forces do not cause climate change. ... and oceanic emissions of CO2 and know that they are small compared to anthropogenic emissions, but ...
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How Do We Know Humans Are Causing Climate Change? | Climate ...
https://www.climaterealityproject.org/.../how-do-we-know-humans-are-causing-climat...Feb 1, 2019 - Yes, we know humans are responsible for the climate changewe see ... as if we're wrapping another, not-so-natural blanket around the Earth.
Global warming isn't just a natural cycle » Yale Climate Connections
https://www.yaleclimateconnections.org/.../global-warming-isnt-just-a-natural-cycle/Sep 18, 2018 - Here's how we know that. ... Global warming isn't just anatural cycle. By Sara Peach on Sep ... The earth's temperature changesnaturally over time. Variations ... Earth's warming: How scientists know it'snot the sun. From Yale ...
How Do We Know that Humans Are the Major Cause of Global ...
https://www.ucsusa.org/global-warming/science.../human-contribution-to-gw-faq.htmlJump to Natural and human factors that influence the climate (known as ...- Natural climate drivers include the energy ... in snow and ice cover thatchange how much ... if it were not for these human-made and natural tiny particles.
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Both sets of panels are based on published scientific data, but each uses different datasets and assumptions. On the left, it is assumed that the available temperature records are unaffected by the urban heat island problem, and so all stations are used, whether urban or rural. On the right, only rural stations are used. Meanwhile, on the left, solar output is modeled using the low variability dataset that has been chosen for the IPCC’s upcoming (in 2021/2022) 6th Assessment Reports. This implies zero contribution from natural factors to the long-term warming. On the right, solar output is modeled using a high variability dataset used by the team in charge of NASA’s ACRIM sun-monitoring satellites. This implies that most, if not all, of the long-term temperature changes are due to natural factors.
Here is the link to the full paper.
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