Recent Changes for "Bring the Proxies up to date!" - Climate Audit 101

Bring the Proxies up to date!

Tillman — 2007-12-19 16:16:00

(quick edit)

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- Steve McIntyre recently undertook [http://www.climateaudit.org/?p=2183 fieldwork near Colorado Springs] to update the Graybill [need complete ref] proxies of (mostly) ["stripbark"] [http://en.wikipedia.org/wiki/Bristlecone_pine bristlecone pines] -- and to test the "the Starbucks Hypothesis: could a climate scientist have a Starbucks in the morning, collect tree rings through the day and still be home for dinner?" Both missions were accomplished, and the resulting tree-ring data promptly [http://www.climateaudit.org/?p=2422 archived]. Heavy equipment was not required, and the entire Almagre resampling program cost [http://www.climateaudit.org/?p=2501 about $4,000], paid for by CA readers contributions.	+ Steve McIntyre recently undertook [http://www.climateaudit.org/?p=2183 fieldwork near Colorado Springs] to update the Graybill and Idso (1993) proxies of (mostly) ["stripbark"] [http://en.wikipedia.org/wiki/Bristlecone_pine bristlecone pines] -- and to test the "the Starbucks Hypothesis: could a climate scientist have a Starbucks in the morning, collect tree rings through the day and still be home for dinner?" Both missions were accomplished, and the resulting tree-ring data promptly [http://www.climateaudit.org/?p=2422 archived]. Heavy equipment was not required, and the entire Almagre resampling program cost [http://www.climateaudit.org/?p=2501 about $4,000], paid for by CA readers contributions.

Bring the Proxies up to date!

KarlMogel — 2007-12-16 00:24:22

adding quote, italic, suggested link for explanation, etc

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- This question was posed to [http://en.wikipedia.org/wiki/Michael_Mann_%28scientist%29 Michael Mann] at [http://www.realclimate.org/index.php?p=11#comments Realclimate] His reply: "Most reconstructions only extend through about 1980 because the vast majority of tree-ring, coral, and ice core records currently available in the public domain do not extend into the most recent decades. While paleoclimatologists are attempting to update many important proxy records to the present, this is a costly, and labor-intensive activity, often requiring expensive field campaigns that involve traveling with heavy equipment to difficult-to-reach locations (such as high-elevation or remote polar sites)."	+ This question was posed to [http://en.wikipedia.org/wiki/Michael_Mann_%28scientist%29 Michael Mann] at [http://www.realclimate.org/index.php?p=11#comments Realclimate] His reply: ''"Most reconstructions only extend through about 1980 because the vast majority of tree-ring, coral, and ice core records currently available in the public domain do not extend into the most recent decades. While paleoclimatologists are attempting to update many important proxy records to the present, this is a costly, and labor-intensive activity, often requiring expensive field campaigns that involve traveling with heavy equipment to difficult-to-reach locations (such as high-elevation or remote polar sites)."''
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- For many of the tree-ring proxy sites, the calculated tree-ring temperature proxies diverge sharply from the actually-measured temperatures in the late 20th century: for example see [http://www.climateaudit.org/?p=899 Juckes et al. 2006] and [http://www.climateaudit.org/?p=150 Briffa’s Tornetrask Reconstruction]. This clearly calls into question the accuracy of tree-rings as a proxy for temperature. The contortions of the "Hockey Team" to account for the ["Divergence Problem"] make amusing reading: "What critics have observed and Juckes doesn’t discuss is that the average of 387 “temperature-sensitive” sites goes down in the last half of the 20th century (the Divergence Problem). But within the population of 387 sites, you can find some that go up. And surprise, surprise, the Team chooses them over and over. Tornetrask is used in ''every'' study. Juckes has taken cherry picking to a new height by even using it twice (Tornetrask and Fennoscandia, well disguised by the use of different lat/longs.) --[http://www.climateaudit.org/?p=899 Steve McIntyre]	+ For many of the tree-ring proxy sites, the calculated tree-ring temperature proxies diverge sharply from the actually-measured temperatures in the late 20th century: for example see [http://www.climateaudit.org/?p=899 Juckes et al. 2006] and [http://www.climateaudit.org/?p=150 Briffa’s Tornetrask Reconstruction]. This calls into question the accuracy of tree-rings as a proxy for temperature. The contortions of the ''"["The Hockey Team" Hockey Team]" to account for the ["Divergence Problem"] make amusing reading: "What critics have observed and Juckes doesn’t discuss is that the average of 387 “temperature-sensitive” sites goes down in the last half of the 20th century (the Divergence Problem). But within the population of 387 sites, you can find some that go up. And surprise, surprise, the Team chooses them over and over. Tornetrask is used in ''every'' study. Juckes has taken cherry picking to a new height by even using it twice (Tornetrask and Fennoscandia, well disguised by the use of different lat/longs.)"'' --[http://www.climateaudit.org/?p=899 Steve McIntyre]

Bring the Proxies up to date!

Tillman — 2007-12-15 23:40:46

add divergence category

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	+ + *[http://www.climateaudit.org/?cat=64 All CA articles/posts on Divergence]

Bring the Proxies up to date!

DaveDardinger — 2007-12-13 23:36:23

(quick edit)

Differences for Bring the Proxies up to date!

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- This question ws posed to [http://en.wikipedia.org/wiki/Michael_Mann_%28scientist%29 Michael Mann] at [http://www.realclimate.org/index.php?p=11#comments Realclimate] His reply: "Most reconstructions only extend through about 1980 because the vast majority of tree-ring, coral, and ice core records currently available in the public domain do not extend into the most recent decades. While paleoclimatologists are attempting to update many important proxy records to the present, this is a costly, and labor-intensive activity, often requiring expensive field campaigns that involve traveling with heavy equipment to difficult-to-reach locations (such as high-elevation or remote polar sites)."	+ This question was posed to [http://en.wikipedia.org/wiki/Michael_Mann_%28scientist%29 Michael Mann] at [http://www.realclimate.org/index.php?p=11#comments Realclimate] His reply: "Most reconstructions only extend through about 1980 because the vast majority of tree-ring, coral, and ice core records currently available in the public domain do not extend into the most recent decades. While paleoclimatologists are attempting to update many important proxy records to the present, this is a costly, and labor-intensive activity, often requiring expensive field campaigns that involve traveling with heavy equipment to difficult-to-reach locations (such as high-elevation or remote polar sites)."

Bring the Proxies up to date!

Tillman — 2007-12-13 00:45:01

create page

Differences for Bring the Proxies up to date!

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	+ [http://www.climateaudit.org/?p=89 Bring the Proxies Up to Date!!] "I will make here a very simple suggestion: if IPCC or others want to use “multiproxy” reconstructions of world temperature for policy purposes, stop using data ending in 1980 and bring the proxies up-to-date." + + This question ws posed to [http://en.wikipedia.org/wiki/Michael_Mann_%28scientist%29 Michael Mann] at [http://www.realclimate.org/index.php?p=11#comments Realclimate] His reply: "Most reconstructions only extend through about 1980 because the vast majority of tree-ring, coral, and ice core records currently available in the public domain do not extend into the most recent decades. While paleoclimatologists are attempting to update many important proxy records to the present, this is a costly, and labor-intensive activity, often requiring expensive field campaigns that involve traveling with heavy equipment to difficult-to-reach locations (such as high-elevation or remote polar sites)." + + For many of the tree-ring proxy sites, the calculated tree-ring temperature proxies diverge sharply from the actually-measured temperatures in the late 20th century: for example see [http://www.climateaudit.org/?p=899 Juckes et al. 2006] and [http://www.climateaudit.org/?p=150 Briffa’s Tornetrask Reconstruction]. This clearly calls into question the accuracy of tree-rings as a proxy for temperature. The contortions of the "Hockey Team" to account for the ["Divergence Problem"] make amusing reading: "What critics have observed and Juckes doesn’t discuss is that the average of 387 “temperature-sensitive” sites goes down in the last half of the 20th century (the Divergence Problem). But within the population of 387 sites, you can find some that go up. And surprise, surprise, the Team chooses them over and over. Tornetrask is used in ''every'' study. Juckes has taken cherry picking to a new height by even using it twice (Tornetrask and Fennoscandia, well disguised by the use of different lat/longs.) --[http://www.climateaudit.org/?p=899 Steve McIntyre] + + Steve McIntyre recently undertook [http://www.climateaudit.org/?p=2183 fieldwork near Colorado Springs] to update the Graybill [need complete ref] proxies of (mostly) ["stripbark"] [http://en.wikipedia.org/wiki/Bristlecone_pine bristlecone pines] -- and to test the "the Starbucks Hypothesis: could a climate scientist have a Starbucks in the morning, collect tree rings through the day and still be home for dinner?" Both missions were accomplished, and the resulting tree-ring data promptly [http://www.climateaudit.org/?p=2422 archived]. Heavy equipment was not required, and the entire Almagre resampling program cost [http://www.climateaudit.org/?p=2501 about $4,000], paid for by CA readers contributions.