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The CO2 problem in six easy steps (2022 Update)

Real Climate

Step 1: There is a natural greenhouse effect. This means that there is an upward surface flux of IR around (~398 W/m 2 ), while the outward flux at the top of the atmosphere (TOA) is roughly equivalent to the net solar radiation absorbed (~240 W/m 2 ). Step 2: Trace gases contribute to the natural greenhouse effect.

Radiation 352
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Deciphering the ‘SPM AR6 WG1’ code

Real Climate

Another clue indicating a shortcoming is if you look at the atmospheric CO 2 -concentrations over time to see how much impact the IPCC reports have had on the real policy-makers in the world (Figure below). The cause of our changing climate is the increase in atmospheric greenhouse gas concentrations that we have released into the air.

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Alaska Communities Struggle for Baseline Water Data Amid Climate Uncertainty

Circle of Blue

The summer of 2019 began with its usual verve, and as May turned to June turned to July, the height of the busy season, the sleepy town was still dreaming. But between June and August of 2019, fewer than three inches of rain had fallen , roughly half a foot behind seasonal averages. Fishing charters fill. Bellies, too.

2019 214
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A Dangerous Disruption

Legal Planet

The “for one year” part is crucial: stratospheric aerosols stay in the atmosphere roughly a year, so one gram offsets the heating effect of one ton only for the first year after the ton is emitted. SAI can offset the effects of greenhouse gases on global-average temperature, but not their total climatic and environmental effects.

Cooling 364
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A distraction due to errors, misunderstanding and misguided Norwegian statistics

Real Climate

A friend asked me if a discussion paper published on Statistics Norway’s website, ‘ To what extent are temperature levels changing due to greenhouse gas emissions? ’, was purposely timed for the next climate summit ( COP28 ). I don’t know the answer to his question. But this discussion paper is problematic for sure.

Sea Level 326
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California Climate Policy: A Preliminary Report Card

Legal Planet

California has done well in terms of total emission reductions – about a 10% reduction from 2009 to 2019. Electric power related emissions went down about 40% from 2009 to 2019. Total direct transportation emissions in 2019 were about the same as those a decade earlier. What’s the Overall Verdict?

2009 290
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Should the official Atlantic hurricane season be lengthened?

Real Climate

1 Average number of named storms by day of the year in the historical record from 1851–2019 (dark blue line). 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?

2020 255