Parameter Keywords by Proxy or Reconstruction --------------------------------------------- Boreholes physical properties other Climate forcing carbon dioxide solar volcanic other Climate Reconstructions air temperature precipitation ground water lake level salinity sea level atmospheric circulation vegetation sea surface temperature streamflow solar radiation ice extent elevation lake salinity pH equilibrium line altitude sea ice ice elevation pseudo proxy Corals and Sclerosponges age control carbon isotopes physical properties oxygen isotopes trace metals chemistry Fauna age control other population count Fire History charcoal sediment establishment dates fire scar dates Historical document weather observation phenology ship logs crop harvests Ice Core age control atmospheric gas borehole measurements carbon isotopes chemistry instrumental data mineralogy nitrogen isotopes physical properties radiogenic isotopes oxygen isotopes hydrogen isotopes reconstruction accumulation Insect population abundance other Paleoclimate Modeling atmosphere model land model ocean model other model sea ice model Paleoceanography age control biomarkers carbon isotopes geochemistry lithology magnetic susceptibility nitrogen isotopes oxygen isotopes physical properties population abundance trace metals in carbonates other reconstruction radiogenic isotope Paleolimnology (Lake) age control carbon isotopes geochemistry hydrogen isotopes lake level magnetic susceptibility mineralogy reconstruction oxygen isotopes physical properties population abundance Plant Macrofossil age control population abundance other Pollen age control physical properties population abundance other Speleothems (Cave) age control carbon isotopes geochemistry lithology oxygen isotopes trace metals other Tree Ring carbon isotopes density hydrogen isotopes oxygen isotopes width Loess Lake Level Reconstruction Other Collections Instrumental atmospheric temperature precipitation pressure cryosphere Software Database Repository