tag:blogger.com,1999:blog-4142988674703954802.post6930885890683910983..comments2024-09-09T00:23:57.023-07:00Comments on THE HOCKEY SCHTICK: Claim: Warming of 0.09°C over the past 55 years is 'slowly but steadily cooking the world’s oceans'Unknownnoreply@blogger.comBlogger6125tag:blogger.com,1999:blog-4142988674703954802.post-73619061507411996922014-03-05T10:37:55.668-08:002014-03-05T10:37:55.668-08:00Heat capacity of the ocean 0-2000m in J/K (Lubos)
...Heat capacity of the ocean 0-2000m in J/K (Lubos)<br />4.0E+24<br /><br />Average temperature ocean 0-2000m in Degrees C (Willis)<br />6<br /><br />Total heat content 0-2000m in J<br />4.0E+24 x 6 = 2.4E+25<br />(this may be nonsense, as it assumes that the heat content at 0 Deg.C is zero, right?)<br /><br />Change in heat content since 1960<br />2.6E+23<br /><br />Heat content change since 1960 in %<br />2.6E+23 / 2.4E+25 * 100 = 1.08<br /><br />% increase in heat content if ocean were to warm 1 K<br />4.0E+24 / 2.4E+25 = 16.67<br /><br />So to arrive at this 1 Degree C (K) warming would take roughly …<br />16.67% / 1.08% x 50years = 769 years<br />at current ocean warming speed.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-73216170310915757202014-03-03T22:02:55.592-08:002014-03-03T22:02:55.592-08:00http://earthobservatory.nasa.gov/Features/OceanCoo...http://earthobservatory.nasa.gov/Features/OceanCooling/page1.phpMShttps://www.blogger.com/profile/06714540297202434542noreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-79574661240266932682014-03-03T22:02:27.912-08:002014-03-03T22:02:27.912-08:00http://www.junkscience.org/Greenhouse/heat_2006_1....http://www.junkscience.org/Greenhouse/heat_2006_1.pdfMShttps://www.blogger.com/profile/06714540297202434542noreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-85542884076229440302014-02-06T10:35:45.965-08:002014-02-06T10:35:45.965-08:00Good points. Absolutely, the oceans control the at...Good points. Absolutely, the oceans control the atmosphere, the tail doesn't wag the dog.MShttps://www.blogger.com/profile/06714540297202434542noreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-18804632669146687062014-02-06T02:17:58.000-08:002014-02-06T02:17:58.000-08:00I cringe every time I see the heat content of anyt...I cringe every time I see the heat content of anything expressed in terms of 20 kiloton bombs. Such a metric does not even have the merit of "dumbing down".the physics so people can understand it. <br /><br />Who knows the significance of an atom bomb? Why not just use megaCalories or gigaCalories? A Calorie is a physical unit the is in common use. You can read abut Calories on your cornflakes box.<br /><br />The point that needs to be made in discussing the heat capacity of the oceans is that the top 3 meters (10 feet) of the ocean contains as much heat as the entire atmosphere right up to the top where it meets the vacuum of space.<br /><br />There is no mystery about this and it's not controversial. I will demonstrate how simple some of these calculations are. Not rocket science by a long shot.<br /><br />This calculation is based on two metrics that you can calculate easily. <br /><br />Air pressure is about 14 pounds per square inch at sea level. (Your car tires needs about twice this pressure.) <br /><br />Fourteen pounds per square inch is about 9.9 metric tons per square meter. Which tells us that the column of air weighs the same as a column of pure water 9.9 meters deep. [one cubic meter of pure water weighs one metric ton / 1000 kilograms.]<br /><br />The density of sea water is about 3% more than fresh water. So the column of air over a square meter of sea water weighs about the same as 9.6 cubic meters, a column of seawater 31.5 feet deep.<br /><br />So compared to water, how much heat would the air hold? Air has a heat capacity of 1005 J/kg/°K and seawater about 3993 J/kg/°K. So air by weight has about 25% of the heat capacity of seawater. <br /><br />We do not have to know what "J/kg/°K" means because we only use the ratio or percentage. The result is that 25% of 9.6 meters of seawater or 2.4 meters (8 feet) holds the equivalent of the entire heat capacity of the column of atmosphere standing above it.<br /><br />One last step. The oceans take up about 70% of the Earth's surface. So we adjust by dividing 2.4 meters by 0.7 and get 3.5 meters or 11.25 feet. <br /><br />The oceans have about the same heat capacity in the top 3.5 meters (11.25 feet) as the entire atmosphere.<br /><br />Satellite measurements give the average depth of the oceans as 3,682 meters. The oceans have about 100 times the heat capacity of the atmosphere.<br /><br />Note: The value of heat capacity of the atmosphere shown here is close to the figure.obtained by Julia Cole in the panel entitled "Heat Capacity" in the PDF <br /><br />She posted 3.2 meters probably using precise conversion figures while I do most of this from memory on an Excel spreadsheet.. High school stuff most of it and I left high school around 1950 or so. <br /><br />http://www.geo.arizona.edu/geo4xx/geos412/OcSci07.PhysProps.pdf<br /><br />As Richard Feynman liked to say, What is the meaning of it all?<br /><br />Well the meaning is clear I think. During an interglacial cycle of 100,000 years or so the oceans act as a huge heat buffer, heat sink. <br /><br />It would take a very long time for the atmosphere to heat the oceans to any significant depth, hundreds of years, perhaps 1000 years. But a very short time for the oceans either to warm the atmosphere or to cool the atmosphere probably decades.<br /><br />This probably explains why the various ocean oscillations, ENSO, AMO, and PDO have short cycles of 10 to 60 years. <br /><br />It probably also explains the 800-year lag in CO2 content of the atmosphere when the glaciers recede. The oceans take a long time to warm up when the glaciers melt and as the oceans warm they "outgas" CO2 for the same reason your Coca Cola outgases in a warm room.<br /><br />If you are keen to study climate, begin with the oceans and then study the atmosphere. Frank Waltershttps://www.blogger.com/profile/17403044995764984391noreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-46720862651207240272014-02-05T12:18:12.358-08:002014-02-05T12:18:12.358-08:00More recycling of this same propaganda today at Wu...More recycling of this same propaganda today at Wunderground:<br /><br />www.wunderground.com/news/where-global-warming-going-ocean-20140205 MShttps://www.blogger.com/profile/06714540297202434542noreply@blogger.com