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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: Maurice Winn who wrote (40391)	6/2/2013 4:49:21 PM
From: Wharf Rat	1 Recommendation Read Replies (1) \| Respond to of 86356

"when the 0.7 degrees of extra heat finally makes it into the ocean, ", surface temps will be up another few degrees. "Sea level rise will be much less than the surface tension lift of water on the thermometer" Thermal expansion continues apace; the warmer all those molecules become, the faster they move, and the further they separate from each other. "Surface tension lift sea level rise" will get you an F in climate science, but "surface tension lift" and $4.50 will get you a large mocha at Pour Girls. One consequence of the large thermal capacity of the oceans is that it takes many years for the climate system to warm in response to GHG emissions; for example, as discussed in Chapter 6, global surface temperatures would continue to warm for many decades even if GHG concentrations and other climate forcings were stabilized at present values). Moreover, as heat is absorbed by the oceans, the volume of the water expands, causing sea levels to rise. Approximately 50 percent of the observed sea level rise since the late 19th century has been attributed to thermal expansion of the warming oceans (Gornitz et al., 1982). Ocean expansion is neither spatially uniform nor steady in time (Levitus et al., 2009; Lozier et al., 2008). Over the last half century, ocean thermal expansion has varied from approximately one quarter of the total sea level contribution (1961-1993) to a FIGURE 7.3 Increase in globally averaged ocean heat content (HC) for the topmost 700 m of the ocean. The dashed black line represents estimates from Levitus et al. (2005); the red line shows estimates from Levitus et al. (2009). For both lines, the values are calculated with respect to the 1957 to 1990 periods. The solid black line shows the positive trend in ocean heat content from 1969 to 2008. Units are 1022 Joules. SOURCE: Levitus et al. (2009). little over one half (1993-2003; Bindoff et al., 2007). books.nap.edu