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:// / Ice cores hYp:// rings/ hYp:// Ideal characteris@cs of climate archives •  •  •  •  •  •  Con@nuous deposi@on (layers) Temporally extensive High temporal resolu@on Precisely datable Complement exis@ng archives Preserves a proxy that reflects climate Proxy •  Proxy – something that acts as a subs@tute 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 rela@onship (func@on) 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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This note was uploaded on 04/01/2013 for the course EVS 311 taught by Professor Hersch during the Spring '13 term at University of Texas at Austin.

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