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Only occur at high latudes only represent ocean

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Unformatted text preview: climate rarchives Tree ings What makes these good climate archives? hYp://www.oceanleadership.org / Ice cores hYp://dendrodan.wordpress.com/category/tree- rings/ hYp://www.sciencedaily.com/ Ideal [email protected] of climate archives •  •  •  •  •  •  [email protected] [email protected] (layers) Temporally extensive High temporal [email protected] Precisely datable Complement [email protected] archives Preserves a proxy that reflects climate Proxy •  Proxy – something that acts as a [email protected] for another What does tree ring width Late growth reflect? Early growth Tree rings •  Temperature •  Rainfall •  Length of growing season •  Drought Index Tree ring with correlated to drought index (PDSI) during instrumental record Used [email protected] ([email protected]) between tree ring width and modern drought index to reconstruct drought when no record existed This drought is worse Water management plans for...
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