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AI does Climate Change

Saturday, August 26, 2023 5:22

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Having just watched (by chance) an old video talk given by Professor Ian Plimer on the Earth’s history and the many factors influenceng climate, I asked our robot thinker ChatGPT to do a mini essay:

Itemise and evaluate factors other than carbon dioxide that may affect climate change

Climate change is influenced by a variety of factors beyond carbon dioxide (CO2) emissions. These factors can have both natural and human-induced origins, and their impacts can either amplify or mitigate the effects of climate change. Here’s a list of some important non-CO2 factors:

Methane (CH4): Methane is a potent greenhouse gas, with a much higher heat-trapping potential than CO2 over a short period. It primarily comes from sources like livestock digestion, rice paddies, wetlands, landfills, and fossil fuel production. Addressing methane emissions is crucial as reducing them could provide significant short-term climate benefits.
Black Carbon (Soot): Black carbon consists of fine particulate matter emitted from incomplete combustion of carbon-based fuels, biomass burning, and industrial processes. It absorbs sunlight, warming the atmosphere and contributing to the melting of snow and ice, thus accelerating the warming of certain regions.
Aerosols: Aerosols are tiny particles suspended in the atmosphere that can either reflect sunlight back into space (cooling effect) or absorb sunlight and heat the atmosphere (warming effect). They can originate from natural sources like volcanoes or human activities like burning fossil fuels. Aerosols can have complex and sometimes counteracting effects on climate.
Land Use Changes: Deforestation, urbanization, and changes in land cover can influence climate by altering the Earth’s surface properties. Forests, for instance, act as carbon sinks, absorbing CO2, while urban areas with dark surfaces (such as asphalt) absorb more heat, contributing to the “urban heat island” effect.
Albedo Effect: Albedo refers to the reflective properties of a surface. Light-colored surfaces, like snow and ice, have a high albedo and reflect sunlight back into space. Dark surfaces, on the other hand, have a low albedo and absorb more heat. Melting ice reduces the planet’s albedo, leading to more heat absorption and further warming.
Water Vapor: Water vapor is the most abundant greenhouse gas in the atmosphere, and its concentration increases with higher temperatures. While it’s not directly controlled by humans, it acts as a feedback mechanism, amplifying the warming effect of other greenhouse gases.
Solar Variability: Changes in the sun’s output can influence Earth’s climate. While variations in solar radiation are relatively small and play a minor role in recent climate change, they have contributed to past climate variations.
Volcanic Activity: Volcanic eruptions release aerosols and gases into the atmosphere, which can have both warming (due to greenhouse gases like CO2) and cooling (due to aerosols reflecting sunlight) effects, depending on the type and magnitude of the eruption.
Ocean Circulation Patterns: Ocean currents play a significant role in redistributing heat around the planet. Changes in these currents, such as El Niño and La Niña events, can influence regional climates and weather patterns.
Industrial and Agricultural Emissions: Besides CO2 and methane, other greenhouse gases like nitrous oxide (N2O) from agricultural practices and industrial processes also contribute to climate change.
Human-made Reflective Surfaces: Urban planning and infrastructure choices can impact local climate through the use of reflective materials that reduce heat absorption.

Evaluating these factors involves considering their magnitudes, lifetimes in the atmosphere, and interactions with other components of the climate system. Addressing non-CO2 factors requires a comprehensive approach to climate policy that goes beyond CO2 reduction strategies.

————

It missed the Milankovitch (Orbital) Cycles but there’s plenty to chew on there.

I liked the talk – and the crack about plate tectonics ridding Australia of New Zealand (‘and that’s a good thing’) and hope to find a cheap copy of his latest book, Green Murder - WOB just sold out.

Source: http://theylaughedatnoah.blogspot.com/2023/08/ai-does-climate-change.html

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