Mt. Erebus Saddle, Antarctica 04/05 Snowpit d18O and Chemical Data Rhodes, R.H.; Bertler, N.A.N.; Baker, J.A.; Sneed, S.; Oerter, H.; Arrigo, K.R. Rhodes, R.H. Bertler, N.A.N. Baker, J.A. Sneed, S. Oerter, H. Arrigo, K.R. earth science/paleoclimate/ice cores (ice age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,snow,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (nitrate,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (chloride,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (sample identification,null,null,null,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (magnesium,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (sulfate,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (sodium,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (methanesulfonate,snow,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Mt. Erebus Saddle>LATITUDE -77.515>LONGITUDE 167.6765) The Ross Sea contains the most biologically productive continental shelf in Antarctica and is a region where the annual formation of sea ice drives substantial amounts of bottom water formation. We present snow pit chemistry data from Mt Erebus Saddle that provide a quantitative proxy to reconstruct summer sea ice conditions and rates of marine primary production. The methylsulphonate (MS) record is strongly correlated with changes in the area of open water (R2 = 0.903, p < 0.05) caused by differences in atmospheric circulation and the sea-ice-damming effect of large icebergs, B-15 and C-19, which calved from the Ross Ice Shelf in 2000 and 2002 respectively. Furthermore, MS and phytoplankton net primary production correlate significantly (R2 = 0.927, p < 0.01). Our results demonstrate the potential of the Mt Erebus Saddle ice core to reconstruct sea ice and primary productivity variability in the Ross Sea beyond the observational record. STUDY NOTES: Major ions and oxygen isotope data from the Mt Erebus Saddle (MES) 04/05 snowpit. Mt. Erebus Saddle 04/05 snowpit, Antarctica: 77.52°S, 167.68°E, 1600m elev. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rhodes, R.H. Investigator : Bertler, N.A.N. Investigator : Baker, J.A. Investigator : Sneed, S. Investigator : Oerter, H. Investigator : Arrigo, K.R. 2012-07-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13176 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.xls English https://www.ncdc.noaa.gov/paleo/study/13176 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/erebus/erebus2009.xls Rhodes, R.H., N.A.N. Bertler, J.A. Baker, S.B. Sneed, H. Oerter, and K.R. Arrigo. 2009. Sea ice variability and primary productivity in the Ross Sea, Antarctica, from methylsulphonate snow record. Geophysical Research Letters, 36, L10704. doi:10.1029/2009GL037311. START YEAR: 1999 AD * END YEAR: 2004 AD 167.6765 -77.515 167.6765 -77.515