{"id":5242,"date":"2018-09-24T02:00:58","date_gmt":"2018-09-24T06:00:58","guid":{"rendered":"http:\/\/www.dontow.com\/?p=5242"},"modified":"2018-09-26T11:18:19","modified_gmt":"2018-09-26T15:18:19","slug":"is-global-warming-due-mostly-to-human-activities","status":"publish","type":"post","link":"https:\/\/www.dontow.com\/2018\/09\/is-global-warming-due-mostly-to-human-activities\/","title":{"rendered":"Is Global Warming Due Mostly to Human Activities?"},"content":{"rendered":"

An article “Environmental Problems: Global Disasters Waiting to Happen<\/a>” in the June 2018 release of this website discusses evidence that global warming (or climate change) is definitely occurring. The increase in the world\u2019s average temperature will have tremendous impacts on the livelihood of essentially all localities across the globe.\u00a0 If we don\u2019t take appropriate actions now, these problems are serious and could become insurmountable 50, 100 years from now. These insurmountable problems will be faced by our children, grandchildren, and great grandchildren due to the actions or in-actions that our leaders adopt today. impacts such as:<\/p>\n

Rising sea level, resulting in massive flooding along every coast.<\/li>\n<\/ul>\n
The 2015 Paris Climate Agreement is a symbol of hope that the leaders of the world are wise enough to recognize the problem and start to initiate actions to address the problem. [1]\u00a0 Unfortunately, our current president of the U.S., Donald Trump, has already announced that the U.S. will withdraw from the Paris Climate Agreement.<\/p>\n
The next critical question is whether global warming is due mostly to human activities.\u00a0 In other words, if global warming is due mostly to natural phenomena or is a historical trend of our planetary system, then there may not be much we as humans can do about it.\u00a0 This article discusses evidence from scientific analysis that global warming during the last 100+ years is primarily due to human activities.<\/p>\n
<\/p>\n
What is global warming?<\/strong>\u00a0 The sun radiates a lot of sunlight (in the visible wavelength) toward earth.\u00a0 Part of the sunlight is reflected back to space, and part of the sunlight is absorbed by the atmosphere, and part of the sunlight passes through the atmosphere unchanged (i.e., transparently). When the sunlight hits the surface of the earth, it interacts with the surface of the earth, part of that energy is transferred to the molecules of the surface of the earth by increasing their molecular motion.\u00a0 The earth’s surface then re-rediates that energy as heat (in the infrared wavelength) to the atmosphere.\u00a0 Some of that heat energy is absorbed by the earth’s atmosphere, and the rest is radiated back to space.\u00a0 The amount of the heat energy absorbed by the earth’s atmosphere depends on the types and amounts of material in the atmosphere.\u00a0 That energy trapped by the atmosphere can warm up the atmosphere and the surface of the earth.\u00a0 If we increase the amount of certain matter in the atmosphere, then the amount of energy absorbed by the atmosphere increases, thus increasing the temperature in the atmosphere and around the surface of the earth, including the water in the ocean.<\/p>\n
This is like sunlight entering a greenhouse, and part of the reflected sunlight gets trapped by the glass of the greenhouse and increases the temperature in the greenhouse.\u00a0 That is why global warming is also known as the greenhouse effect. because part of the energy re-radiated by the earth is absorbed by the earth’s atmosphere resulting in an increase in the temperature of the atmosphere and the surface of the earth.<\/p>\n
History and Current Status of Global Warming Research:<\/strong>\u00a0 Actually global warming research is not new.\u00a0 It goes back to 1859 when the Irish physicist John Tyndall found that carbon dioxide absorbed heat and so variation in the composition of the atmosphere could create changes in climate. Using Tyndall’s findings, the Swedish chemist and future Nobel laureate Svante Arrhenius pointed out in 1896 that the combustion of coal and petroleum could raise global temperatures.\u00a0 Numerous scientific research in the last 100 years have confirmed that the increasing amount of carbon dioxide in our atmosphere from burning coal, gas, and petroleum does contribute to global warming.\u00a0 Scientists can correlate the increase of carbon dioxide and therefore its contribution to global warming in the last 150 years.\u00a0 Besides carbon dioxide, our atmosphere contains other gases, such as water vapor, methane, nitrous oxide, ozone, chlorofluorocarbons, and hydrofluorocarbons.\u00a0 Similarly, scientists can estimate the contribution to global warming (or sometime global cooling) from other influencers in the last 150 years.\u00a0 Such research has repeatedly shown that over this extended period the contribution from carbon dioxide matches nicely with the increase in the earth’s surface temperature over the last 150 years.<\/p>\n
There are other natural (i.e., not man-made) influencers that may contribute to global warming.\u00a0 Here are the two most common examples of natural influencers:<\/p>\n
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Do changes to solar radiation contribute to global warming?\u00a0 It is true that over long periods (millions of years), changes in solar radiation has contributed to earth’s climate change, e.g., ice ages.\u00a0 However, all the research studies have shown that changes in the rate of solar heating over the last century cannot account for the magnitude of the rise in global mean temperature over this extended period.<\/li>\n
Are volcano eruptions causing global warming?\u00a0 Just the opposite, volcano eruptions inject sulphate aerosols high into the stratosphere, where they can remain aloft for a few years, but the sulphate aerosols will reflect incoming sunlight back into space, thus cooling the earth’s surface.\u00a0 Furthermore, once the sulphates drift back down to the surface of the earth, the cooling effect of volcanoes goes away.\u00a0 Both of these results are inconsistent with the observed data.<\/li>\n<\/ul>\n
As a matter of fact, the contribution to global warming from carbon dioxide alone would have increased the earth’s temperature even more than the observed curve.\u00a0 After taking into account that certain influencers actually decrease the earth’s temperature, such as volcano eruptions or man-made aerosol released into the atmosphere by various aerosol cans (e.g., for mosquito repellents), then the total contribution to global warming matches nicely with the observed increased in temperature over the last 150 years. [2]<\/p>\n
Political History and Implications:\u00a0 <\/strong>Actually fairly early top scientists and leaders of the U.S. government already realized the seriousness of the global warming problem.\u00a0 For example, in 1974, the CIA already issued a classified report that climate change had begun around 1960 due to the carbon dioxide problem, and had “already caused major economic problems throughout the world.”\u00a0 In 1978, Jason, the federal government’s premiere team of the most intelligent American scientists already issued a report that when the amount of carbon dioxide doubles in about 50+ years, disastrous climate changes would result, including rapid melting of the West Antarctic ice sheet.\u00a0 In 1979, Dr. Jule Charney, the father of modern meteorology and a team of the nation’s top oceanographers, atmospheric scientists and climate modelers issued a report validating the seriousness of the global warming problem.\u00a0 This study was commissioned by Dr. Frank Press, Scientific Advisor to President Carter.\u00a0 In other words, almost 40 years ago, the scientific results were already fairly extensive and definitive that the overwhelming majority of climate scientists believe strongly that global warming is both a fact and is caused by human activities.<\/p>\n
However, for various political reasons and the lobbying strength of the coal, gas, and oil industry. the necessary actions that can address and slow down the global warming problem were never implemented during the last almost 40 years.\u00a0 We know that if we don’t act to reduce emissions of carbon dioxide, the problem may escalate to a point of no return.\u00a0 The problem will be worse for our children, and become more worse for their children, and their children’s children.\u00a0 It seems that based on our inactions, their lives don’t seem to mean anything to us.\u00a0 We hope that at some point, the fears of our young people, will overcome the fears of the old, and a future generation will gather enough wisdom and power to act. [3]<\/p>\n
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[1]\u00a0 The 2015 Paris Climate Agreement is a voluntary agreement, and almost all the countries of the world are not doing nearly as much as what were projected.\u00a0 Nevertheless, its very existence is a recognition by the international community of the importance of this issue and the need to address it.<\/p>\n
[2] See, e.g., the article “Analysis: Why scientists think 100% of global warming is due to humans<\/a>“:\u00a0 https:\/\/www.carbonbrief.org\/analysis-why-scientists-think-100-of-global-warming-is-due-to-humans.<\/p>\n
[3] The whole 60-page August 5, 2018 issue of the New York Times Magazine <\/em>was about the global warming problem.<\/p>\n","protected":false},"excerpt":{"rendered":"
An article “Environmental Problems: Global Disasters Waiting to Happen” in the June 2018 release of this website discusses evidence that global warming (or climate change) is definitely occurring. The increase in the world\u2019s average temperature will have tremendous impacts on the livelihood of essentially all localities across the globe.\u00a0 If we don\u2019t take appropriate actions […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[6],"tags":[],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/posts\/5242"}],"collection":[{"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/comments?post=5242"}],"version-history":[{"count":25,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/posts\/5242\/revisions"}],"predecessor-version":[{"id":5321,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/posts\/5242\/revisions\/5321"}],"wp:attachment":[{"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/media?parent=5242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/categories?post=5242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dontow.com\/wp-json\/wp\/v2\/tags?post=5242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}