Global Warming

Rationale: Sulfur hexafluoride (SF6) has an extremely high GWP, roughly 23,500 times greater than CO2 over a 100-year period, making it the most potent greenhouse gas listed.

Rationale: Svante Arrhenius was a Swedish scientist who in 1896 became the first to use basic principles of physical chemistry to calculate estimates of the extent to which increases in atmospheric CO2 will increase Earth's surface temperature.

Rationale: When white ice melts, it exposes darker ocean water or land underneath, which absorbs more solar radiation. This warms the surface further, causing more ice to melt—a classic positive feedback loop.

Rationale: The Mauna Loa Observatory in Hawaii, situated high on a volcano, provides an atmosphere relatively free from local pollution, serving as the benchmark site for continuous CO2 measurements.

Rationale: Energy supply, electricity production, and heat generation combined remain the single largest source of global greenhouse gas emissions due to the burning of coal, oil, and natural gas.

Rationale: CFCs are extremely potent greenhouse gases with GWPs thousands of times higher than CO2, contributing significantly to global warming in addition to depleting the stratospheric ozone layer.

Rationale: Radiative forcing expresses the net change in the energy balance of the Earth's climate system in Watts per square meter (W/m²).

Rationale: The Kyoto Protocol, adopted in 1997, operationalized the United Nations Framework Convention on Climate Change by committing industrialized countries to limit and reduce greenhouse gas emissions.

Rationale: When oceans absorb excess anthropogenic CO2 from the atmosphere, chemical reactions occur that decrease seawater pH, leading to ocean acidification.

Rationale: Volcanic eruptions inject sulfur dioxide and ash into the stratosphere, scattering incoming solar radiation and causing temporary global cooling, making it a natural forcing factor.

Rationale: While some CO2 is absorbed quickly by oceans and plants, a significant portion remains in the atmosphere for centuries to millennia, driving long-term climate change.

Rationale: As permafrost thaws, ancient organic matter decomposes, releasing stored carbon dioxide and methane into the atmosphere, further accelerating global warming.

Rationale: Water vapor is the most abundant greenhouse gas, but its concentration depends directly on air temperature; thus, it acts as a powerful feedback mechanism rather than an independent initial forcing agent.

Rationale: The Intergovernmental Panel on Climate Change (IPCC) periodically publishes comprehensive Assessment Reports synthesizing peer-reviewed climate science worldwide.

Rationale: The central goal of the Paris Agreement is to strengthen the global response to the threat of climate change by keeping a global temperature rise this century well below 2.0 degrees Celsius above pre-industrial levels and pursuing efforts to limit it to 1.5 degrees Celsius.

Rationale: Tropospheric ozone is a strong greenhouse gas and a major short-lived climate pollutant (SLCP) found in the lower atmosphere, formed by photochemical reactions involving air pollutants.

Rationale: Aerosols have complex effects; sulfate aerosols scatter and reflect sunlight back to space (cooling), whereas black carbon (soot) absorbs solar radiation and warms the atmosphere.

Rationale: A climate tipping point refers to a critical threshold when global or regional climate transitions from one stable state to another, often irreversibly.