Global Dimming - Rau's IAS

Global dimming is the gradual reduction in the amount of global direct irradiance at the surface of the earth. It is a concept that has been observed since systematic measurements began in the 1950s.
Global dimming, surprisingly, has an opposite effect to global warming as it produces cooling effects, so in essence, global dimming is beneficial to the environment, although it brings about elements of literal darkness on earth. The effects of global dimming vary by location, with some areas being badly affected than others.

Various Causes of Global Dimming

Impact on Water: Global dimming leads to a decrease in solar radiation reaching the Earth's surface, resulting in cooler water temperatures in certain regions. This reduces evaporation and the formation of water droplets, leading to reduced rainfall and potential drought and famine situations.
Drought in Sub-Saharan Africa: Global dimming has been linked to the severe drought and famine experienced in the Sahel region of sub-Saharan Africa in the 1970s.
Changes in Land Temperatures: Global dimming prevents a portion of solar energy and heat from reaching the Earth's surface, resulting in lower overall land temperatures. This can lead to colder days and a shift in global temperature patterns.
Effects on Plants: Diminished sunlight due to global dimming can adversely affect plant photosynthesis. As plants rely on sunlight for photosynthesis, a decrease in solar radiation can hinder their ability to convert water, carbon dioxide, and minerals into oxygen and energy-rich compounds.
Counteracting Global Warming: Global dimming, to some extent, counteracts the warming effects of greenhouse gas emissions, mitigating the pace of global warming.