Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb transitive, statistics, economics to
manipulate data to remove long-termtrends in order toemphasise short-term changes.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Rypdal and Rypdal show that this result is an artifact forced when Scafetta and West did not detrend the two time series and show that SFI is a Lévy flight while GTA is a fractional Brownian processl
Never mind EliRabett 2009
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Rypdal and Rypdal show that this result is an artifact forced when Scafetta and West did not detrend the two time series and show that SFI is a Lévy flight while GTA is a fractional Brownian processl
Archive 2009-12-01 EliRabett 2009
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The Chi square goodness of fit test to a Poisson distribution for the untreated data yielded a p = 0.09, while the data worked by Willis E. to detrend and with cycle removal gave a Chi square goodness of fit to a Poisson distribution of p = 0.87.
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If you detrend, you can see a 60 year cycle of about 0.25C amplitude on top of that.
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Back to business, we have a figure to replicate. richardT , did I understand correctly, you detrend the simulated series as well?
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Re #105, Judith, the Mann-Emanuel use of the global SST to detrend the AMO, versus using a linear trend, is a red herring.
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They then attempt to “detrend” the tropical SST data not by taking out a linear trend, but by removing the global or at least hemispheric forcing of the surface temperatures.
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They then attempt to “detrend” the tropical SST data not by taking out a linear trend, but by removing the global or at least hemispheric forcing of the surface temperatures.
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In the case of the Polar Urals data, we KNOW that the raw ring-width data have strong biological growth trends and if we do not adequately detrend these trends, then we end up with a time series similar to the ones generated by both me and Steve see above.
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You need to look at year to year variance, to detrend, etc.
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