records of past climate change that
are preserved in the geochemistry of carbonates including speleothems (cave formations, e.g.
and stalagmites), foraminifera, otoliths, corals, stromatolites and pedothems. Ultimately, these records
will help to calibrate our understanding of: 1) seasonal climate
patterns in the past, and 2) atmospheric and oceanic circulation during rapid
events. I use a combination of micro-imaging and analytical techniques,
but the anchor of my work has been the WiscSIMS CAMECA ims-1280
at the University of Wisconsin-Madison. The WiscSIMS ion microprobe can
make high-precision measurements of
oxygen isotope ratios and trace element concentrations from
10-micron-diameter (or smaller) spots. The 10 micron spatial-resolution
represents an order of magnitude improvement over conventional
drill-sampling techniques and allows me to
interpretations of past environmental change.