User:Mleggett8/sandbox

Article Evaluation

The article contains information about the history and different types of negative feedback. The article focuses on negative feedback systems within a human body, the applications of negative feedback systems to mechanical and electrical engineering, and on the effects of negative feedback on the economy. Additionally, within the sections about mechanical and electrical engineering, the editors have included information about the mathematical processes by which one can determine the amounts of negative feedback in a system and ways to amplify and muffle the effects of negative feedback in one's results. The article contains many many links to external informational sources, and the scientific information appears to be cited and not contain any jargon.

There is more information about the engineering and biological applications, but not very much information about the economic or environmental applications of negative feedback systems.

The links to sources that I checked all worked and contained relevant information.

The Talk page contains a big argument about how to conclude the last paragraph of the page. Most of it is talking about specifics of mechanisms related to the math behind the mechanical and electrical engineering parts of the article so I don't really understand it. This page is part of the WikiProjects for Molecular and Cell Biology as well as Systems and is rated as a C-Class, High-Importance in both Projects.

Lead Section addition:

Negative feedback loops also play an integral role in maintaining the atmospheric balance in various systems on Earth. One such feedback system is the interaction between solar radiation, cloud cover, and planet temperature.

Article addition:

A basic and common example of a negative feedback system in the environment is the interaction among cloud cover, plant growth, solar radiation, and planet temperature. As incoming solar radiation increases, planet temperature increases. As the temperature increases, the amount of plant life that can grow increases. This plant life can then make products such as sulfur which increase the cloud cover. An increase in cloud cover means an increase in the albedo, or surface reflectivity, of the Earth. As albedo increases, however, solar radiation decreases. This, in turn, affects the rest of the cycle.

Cloud cover, and in turn planet albedo and temperature, is also influenced by the hydrological cycle. As planet temperature increases, more water vapor is produced, creating more clouds. The clouds then block incoming solar radiation, decreasing the temperature of the planet. This produces less water vapo r and there is then less cloud cover. The cycle then repeats in a negative feedback loop. In this way, negative feedback loops in the environment are stabilizing.

Bibliography Round 1

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Giannini, Alessandra; Biasutti, Michela; Verstraete, Michel M. (2008) "A Climate Model-Based Review of Drought in the Sahel: Desertification, the Re-Greening and Climate Change". Elsevier. 64 (3-4): 119-128 https://doi.org/10.1016/j.gloplacha.2008.05.004

Winton, Michael (2006) "Amplified Arctic Climate Change: What does surface albedo feedback have to do with it?". Geophysical Research Letters 33 (3) https://doi.org/10.1029/2005GL025244

Stevens, Graeme (2005) "Cloud Feedbacks in the Climate System: A Critical Review". Journal of Climate 18: 237-273 https://doi.org/10.1175/JCLI-3243.1