Understanding Global Climate Change
Greenhouse Gasses


The Carbon Dioxide Greenhouse Effect 
The Discovery of Global Warming 

  In the 19th century, scientists realized that gases in the
  atmosphere cause a "greenhouse effect" which affects the
  planet's temperature. These scientists were interested
  chiefly in the possibility that a lower level of carbon
  dioxide gas might explain the ice ages of the distant past.
  At the turn of the century, Svante Arrhenius calculated that
  emissions from human industry might someday bring a global
  warming. In 1938, G.S. Callendar argued that the level of
  carbon dioxide was climbing and raising global temperature,
  but most scientists found his arguments implausible. It was
  almost by chance that a few researchers in the 1950s
  discovered that global warming truly was possible. 

  In the early 1960s, C.D. Keeling measured the level of carbon
  dioxide in the atmosphere: it was rising fast. Researchers began
  to take an interest, struggling to understand how the level of
  carbon dioxide had changed in the past, and how the level was
  influenced by chemical and biological forces. They found that the
  gas plays a crucial role in climate change, so that the rising
  level could gravely affect our future.


Atmospheric Transmission


Earth's Energy Imbalance (Radiative Forcing)
  The earth is absorbing more energy from the sun than it's
  giving up due to increasing greenhouse gas concentrations.
  The excess energy that the planet is absorbing is enormous.
  The total energy imbalance is now greater than 3.1 W/m^2.

  From the Laws of Thermodynamics earth must warm until it
  reaches a new equilibrium (Ein = Eout) at higher temperature.
  Given current concentrations of greenhouse gasses, the earth
  will continue to warm for centuries.

James Hansen (2012): Why I must speak out about climate change
  https://www.youtube.com/watch?v=fWInyaMWBY8   (17+ min)

Greenhouse CH4 Monitoring

Climate Change Indicators

IPCC (Intergovernmental Panel on Climate Change)
  https://www.ipcc.ch/reports/  <==
  https://www.ipcc.ch/ar6-syr/  <==

  Leading climate scientists have given their starkest warning
  yet-that we are rushing to the brink of climate catastrophe‚
  In a landmark report last Monday. The Intergovernmental
  Panel on Climate Change (IPCC) published its sixth
  assessment report, a comprehensive review of the world's
  knowledge of the climate crisis and how human actions are
  altering the planet. It shows in detail how close the world
  is to irreversible change.

  One of the key action points for policymakers is a warning
  that methane is playing an ever greater role in overheating
  the planet. The carbon-rich gas, produced from animal
  farming, shale gas wells, and poorly managed conventional
  oil and gas extraction, heats the world far more effectively
  than carbon dioxide-it has a "warming potential" more than
  80 times that of carbon dioxide-but has a shorter life in
  the atmosphere, persisting for about a decade before it

UNDRR -- GAR Special Report on Drought 2021

Fourth National Climate Assessment (NCA4), Volume I
Fourth National Climate Assessment (NCA4), Volume II

Tutorial: Evaluating and Explaining Climate Science

Skeptical Science: Climate Myths sorted by taxonomy 

Berkeley Earth: A skeptic's guide to climate change

Berkeley Earth: CO2 - Temperature Correlation