Very, very few places actually NEED the fresh water that California has restricted out of use: That is, Crude oil can be piped long distances ONLY because it costs some 100.00 dollars per barrel. This “year” is less than half over.Ĭan someone comment on why nuclear power plants do not have seawater desalination as the preferred and standard cooling method.ġ. The current water year (2014-2015) will not end until the summer of 2015, exact dates depending on water agency policies. If you review the Lynch report, you will find that the lowest annual precipitation was the 1789-1790 water year. Slopes of the regression lines are close to zero. I did a linear regression analysis on the data, and also an extension (ref Bedient & Huber) of the data to present. The index stops at 1930, and DWR did an extension to 2000. The Lynch Index spreadsheet correlates the index from the 1931 report with the rainfall record for Los Angeles. Lynch, for the Metropolitan Water District of Southern California. The Lynch Index was based on the August 1931 report, “Rainfall and Stream Run-Off in Southern California Since 1769″ by H. The state climatologist at might provide some information. The CA Weather CD updated to 2009 does not appear to have that file. Jim Goodridge sent me a California Weather CD in 2002 that contained the file “Lynch Index.xls” that tabulates Southern California rainfall from 1769-1770 to 1999-2000. There is another set of California records going back to 1769 that you might consider, related to the “Lynch Index” that was in the California Weather Sumary CD. Christy: Thank you for your effort in bringing old records to light. My comment follows, with links to the original reports:ĭr. I responded with an addition of a rainfall record going back to 1769-1770. John Christy anayzed that as reported in a 2012 WUWT post: Much of California water storage depends on the Sierra snowpack. Thus, the palaeoclimatic record suggests that multi-year, decadal and even centennial-scale drier periods are likely to remain a feature of future North American climate, particularly in the area west of the Mississippi River. Past droughts, including decadal-length ‘megadroughts’ (Woodhouse and Overpeck, 1998), are most likely due to extended periods of anomalous SST (Hoerling and Kumar, 2003 Schubert et al., 2004 MacDonald and Case, 2005 Seager et al., 2005), but remain difficult to simulate with coupled ocean-atmosphere models. Multiple proxies, including tree rings, sediments, historical documents and lake sediment records make it clear that the past 2 kyr included periods with more frequent, longer and/or geographically more extensive droughts in North America than during the 20th century (Stahle and Cleaveland, 1992 Stahle et al., 1998 Woodhouse and Overpeck, 1998 Forman et al., 2001 Cook et al., 2004b Hodell et al., 2005 MacDonald and Case, 2005). IPCC Fourth Assessment Report: Climate Change 2007
Over the last 2,000 years a feature of the climate west of the Mississippi is drought. Note: I think the chart and claims are about PRECIPITATION. If we begin our search for a solution from reality, it is more likely that we can achieve a realistic long term solution. Wow… that was really a dry 30 year period.ĭo these facts mean that we are in good shape re California’s water supply? No!īut we shouldn’t be framing the search for a stable California water supply by starting from a wildly incorrect statement that seems focused on creating public panic. The current water year (October 2013 through September 2014) ranks as the 3rd driest in the last 120 years (at 52% of normal).Īs for the claim that this is the worst multi-year drought in California history – look at the period of 1910-40 on the WRCC chart. The driest year was 1924 (9.23 inches, or 40% of normal). Is it true that we are in the worst drought in California history? Let’s look at the facts for the last 120 years (1895 to present).Īs shown in this chart from the Western Regional Climate Center website ( ) - this is not even the 2nd driest water year for California in the last 120 years. Guest essay by Robert Moore The progression of the Palmer Drought Severity Index for California over the past three years.
0 kommentar(er)
