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The year 2023 was by far the warmest in Earths recorded history, and perhaps in the past 100,000 years , shattering the previous record set in 2016 by 0.27C (0.49F). Albedo is the total reflection of incoming solar radiation by Earth. But why were 2023 and 2024 so warm? What is albedo?
The fact that there is a natural greenhouse effect (that the atmosphere restricts the passage of infra-red (IR) radiation from the Earth’s surface to space) is easily deducible from; i) the mean temperature of the surface (around 15ºC) and, ii) knowing that the planet is normally close to radiative equilibrium. in IPCC TAR).
The observed reduction in surface warming trend over the period 1998 to 2012 as compared to the period 1951 to 2012, is due in roughly equal measure to a reduced trend in radiative forcing and a cooling contribution from natural internal variability, which includes a possible redistribution of heat within the ocean ( medium confidence ).
This knowledge can help with solar radiation management in marine ecosystems, including the Great Barrier Reef. One of the worst mass bleaching events occurred in 2016 and 2017 on the Great Barrier Reef, causing bleaching on 91% of the system’s reefs. Over the past two decades, coral reefs have declined at unprecedented rates.
Student in the Department of Atmospheric Science at Colorado State University Most people remember the water cycle they learned in school: water evaporates from lakes, rivers, and the ocean, air carrying this moisture rises, cools, condenses, and forms clouds, and these clouds precipitate water back down to the surface.
Cool heads and clear thinking are mandatory in the competitive world of front-line research as academic leaders strive for that winning – and sustainable – combination of visibility, recognition and impact that will set their physics programmes apart from the rest of the field.
The issue is that total human radiative forcing includes several parts that heat and some that cool, so counting separate heating contributions like this leaving out the cooling parts gives too much heating.). The most important recent change was a new measurement of methane’s infrared absorption in 2016.
Figure 1: Size reference for atmospheric particles (US EPA 2016) and a general structure of freshly created black carbon. Interactions and Indirect Environmental Effects Clouds are a beautiful feature of our atmosphere, but they also have an important role: cooling. April 19, 2016. link] Jacobson, Mark Z. March 26, 2014.
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