Real Climate

NOVEMBER 23, 2024

It’s 20 years since we started blogging on climate here on RealClimate (December 10, 2004). There is one graph that perhaps tells the story of what has happened since 2004, and it’s the Keeling curve shown in the figure below. In a nutshell, they are responsible for climate change, mainly due to an increased greenhouse effect.

2004 268

2004 Climate Change Atmosphere Carbon Dioxide 268

Real Climate

SEPTEMBER 6, 2023

Well, back in 1993 (before the more comprehensive critiques had been published), Hoyt and Schatten put together a long-term estimate of solar activity that relied on the SCL, based on the idea from FCL91 and scaled to a finding about cycling and non-cycling stars that turned out to be wrong too (Wright, 2004). 1273-1278, 2004.

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2005 2003 2015 2004 351

Real Climate

MARCH 4, 2021

Since it was a control simulation with no external “forcing” (no greenhouse gas changes, no variations in solar output, no volcanic eruptions, etc.), any oscillation that was produced has to be internally generated. Consider a parallel analysis (Figure 1-right) of the CMIP5 historical simulations.

Cooling 269

Cooling Ocean Radiation 2005 269

Real Climate

APRIL 2, 2021

But this also raises other questions: 1) Can we expect the season to continue to lengthen as global warming from increasing concentration of globally well mixed greenhouse gas (GWM-GHG) continues to warm the Atlantic SSTs? In particular, they don’t just respond to SST changes, but also how the atmosphere changes as the SSTs change.

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2020 2016 2008 Atmosphere 255

PA Environment Daily

JANUARY 21, 2022

million in Alternative Fuel Incentive Grants (AFIGs) to 18 cleaner fuel transportation projects statewide that will reduce greenhouse gas emissions and other air pollutants. Vehicles alone release 21 percent of carbon dioxide emissions in the state, a known greenhouse gas and direct contributor to climate change.

Nitrogen Oxides 52

Nitrogen Oxides Greenhouse Ground-Level Ozone Carbon Dioxide 52

PA Environment Daily

AUGUST 11, 2021

Greg Vitali Methane is a powerful greenhouse gas and Pennsylvania’s oil and gas industry is a major methane emitter. About 12,800 unconventional gas wells (think fracking) have been drilled in Pennsylvania since 2004. It’s time to finalize these regulations. Methane reduction is critical in addressing climate change. Read more here.

Regulations 57

Regulations Natural Gas Climate Change 2016 57

Edouard Stenger

NOVEMBER 15, 2022

It details 80 (+ 20) ways to slash global greenhouse gases emissions and achieve emissions levels that can be absorbed by Nature. Eventually, CO2 levels in the atmosphere would return to 350 ppm. Regeneration is the sequel and it brings myriads of concrete solutions to implement in every aspects of our lives.

2004 52

2004 Fossil Fuels Ocean Waste 52