A question for readers: which of the following proxies are used to reconstruct past Southern Hemisphere temperature in the IPCC’s graphic (Figure 5.7b) showing SH reconstructions: 1. Graybill’s California strip-bark bristlecone chronologies 2. upside down and contaminated Finnish lake sediments 3. European instrumental temperature data 4. Antarctic ice core d18O isotope data covering the medieval […]
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