Sentences with phrase «stick shaped proxy»

Jean S: Oh, I guess you simply forgot to exclude also the «Gaspe series» you later describe as «the most hockey - stick shaped proxy of all».

The four year unreported ad - hoc extension makes all the difference whether «the most hockey - stick shaped proxy of all» gets included or excluded to AD1400 network.

It just might be the most hockey - stick shaped proxy of all.

Oh, I guess you simply forgot to exclude also the «Gaspe series» you later describe as «the most hockey - stick shaped proxy of all».

Perhaps you'll join Montford in complaining that hockey - stick shaped proxies dominate reconstructions because they correlate well with temperature.

Montford doesn't just criticize hockey - stick shaped proxies, he bends over backwards to level every criticism conceivable.

Not exact matches

(c) You state «The autocorrelation of the «blade» segment of «hockey - stick» shaped proxies is significantly higher than the rest of the series».

The autocorrelation of the «blade» segment of «hockey - stick» shaped proxies is significantly higher than the rest of the series, this biases their estimates of autocorrelation parameters because their model assumes a stationary autocorrelation structure, making their simulated series unrepresentative of most of the length of hockey - stick series, as can be seen in this graph of lag - 1 autocorrelation coefficients.

Yet even when I «jack up» the autocorrelation to ridiculously high values, the hockey - stick - shaped PC # 1 still doesn't come close to matching the strength of PC # 1 from the MBH98 analysis of the NoAmer ITRDB proxies.

So you are unaware that removing one proxy from their study (Bristlecone pines) completely eliminates the hockey stick shape?

To my knowledge, the proxies you mention are for the most part (1) scarce, (2) incompletely validated, and / or (3) lacking in adequate (decadal or better) resolution for «hockey stick shape» determination.

M&M argued that the hockey stick relied for its shape on the inclusion of a small set of invalid proxy data (called bristlecone, or «strip - bark» records).

Moberg's proxy data ends in 1979, and then the hockey - stick shaped instrumental data is tendentiously grafted onto the end of the proxy record so as to hide the decline.

Basically the climatologists who have produced hockey stick shaped graphs have done so by carefully selecting proxies that produce the results they want.

The BCPs impart the hockey stick shape, the rest of the proxies are basically just white noise.

Explore cases where at least one proxy has a hockey - stick shape.

Wahl and Ammann reject this criticism of MM based on the fact that if one adds enough principal components back into the proxy, one obtains the hockey stick shape again.

«A further aspect of this critique is that the single - bladed hockey stick shape in proxy PC summaries for North America is carried disproportionately by a relative small subset (15) of proxy records derived from bristlecone / foxtail pines in the western United States, which the authors [MM] mention as being subject to question in the literature as local / regional temperature proxies after approximately 1850.

There is nothing to cite that the Natural Climate Oscillation is being altered by simplistic productions of «temperature plots» no matter HOW MANY supposed proxies are proffered and there is no value at all in wasting more time on the «hockey stick debacle», time to realise that the «hockey plot» is not proffering any worthwhile information on ANY Real process, and its entire «shape» was defined NOT by «data» but by an attitude of predetermination within the group of «experimenters».

The net effect of this decentering using the proxy data in MBH98 and MBH99 is to produce a «hockey stick» shape.

What is missing in all this is whether the higher order PC's that would have been derived from the red noise proxies, and included in the full PCA, would have eliminated the hockey stick shape in the full representation of the data, using the correct number of PC's.

2) The graph, which put the twentieth century warming in stark contrast with recent proxy records in the famous «hockey stick» shape appeared on the cover of the IPCC's third assessment report in 2001

Despite having no trend in the underlying proxies the MBH98 method regularly produces hockey stick - shaped PC1 s which then fit neatly against the temperature data, despite having, in principle, zero explanatory power.

The MBH pre-processing of dense proxy networks tends to «promote» the «hockey stick» shape into the first principal component of that subset.

Removing those proxies (again, IIRC) also removed most of the «hockey stick» shape from the «hockey stick».

The Yang Chinese composite, after the Mann PC1 and Yamal, had the third - largest hockey stick shape of the proxies illustrated in the IPCC AR4 spaghetti graph.

In fact most all of the proxies which actually show the hockey - stick shape do so for reasons not particularly related to temperature increases.

And, in fact, when one removes the black line from measured temperatures and looks at only proxies, the hockey stick shape goes away:

Advocates deemed the conglomeration of proxy temperature data from 7 land regions as scientific confirmation of the notorious hockey - stick - shaped temperature -LSB-...]

(Though if you can show a peer - reviewed analysis showing why said proxy should be a proxometer as opposed to other proxies which aren't hockey - stick shaped, that will do.)