Climate, paleoclimate, huevos rancheros, and general asymmetry

Tuesday Links

with 3 comments

  • Jeffrey Park from Yale examines the relationship between temperature and CO2 at interannual time scales in Geophysical Research Letters.

Since 1979, at Mauna Loa and other observation sites, interannual coherence exhibits a 90° phase lag that suggests a direct correlation between temperatures and the time-derivative of CO2. The coherence transition can be explained if the response time of CO2 to a global temperature fluctuation has lengthened from 6 months to at least 15 months. A longer response time may reflect saturation of the oceanic carbon sink, but a transient shift in ocean circulation may play a role.

The combination of wind direction data from Ethiopia and θe distribution in Africa indicates that transpired moisture from the Sudd and the Congo Basin is likely responsible for the high isotopic values of rainfall in Ethiopia.


Written by delayedoscillator

December 8, 2009 at 1:52 pm

3 Responses

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  1. Hi there! Have you seen the regional reconstruction in Mann et al 2009?:;326/5957/1256

    Although they use more than 1000 proxies, I’ve been told (by a lay person, of course) that only 50 proxies go back to the Medieval Warm Period (supplementary material), therefore the extrapolation is so big that the regional reconstruction is not reliable. Any thoughts about it?

    Thanks in any case 😉


    December 11, 2009 at 10:40 pm

  2. Hi! Love this blog, it’s the best thing on tree rings that I’ve found. The CRU website is all messed up, do you know if there is anyplace the Yamal data is online? Or perhaps you can send it to me? I want to do a post at the Panda’s Thumb on the recent climate craziness, and just do a whole first-cut analysis in R. Kind of my winter-break project…


    December 21, 2009 at 2:27 am

  3. Yes, it appears as though the CRU webpages with the Yamal raw data are still being rebuilt since the illegal hack of their system. Let me see if I can email you the raw data, although it is always better to get from the original source.


    December 29, 2009 at 3:23 am

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