This dataset contains measurements of nitrate in snow on the sea-ice. These vertical nitrate profiles were collected from snow pits that were dug at each ice station during the SIPEX II voyage in 2012. The snow depths range from 25-55 cm and snow samples were collected in 5 to 10 cm intervals from the snow surface to the top of the sea-ice. The snow was then melted and passed through a resin to collect the nitrate. The nitrate was then eluted with a strong NaCl solution and kept in bottles that were frozen at -20 degrees C. The samples were shipped frozen back to Seattle where they will be analysed using an ion chromatograph. The ion chromatograph outputs the data as text files. At this stage, samples have been collected but not analysed so no data currently exists.

This data set is the logged, annualised summer sea salt (December to March, DJFM) concentrations from the Law Dome ice core chemistry record, spanning 1000-2009 AD (dates apply to the year of JFM, so e.g. 1980 is an average of Dec 1979 and Jan-Mar 1980). The data are compiled from numerous ice cores drilled at the Law Dome site sequentially since 1987, and chronologically dated using volcanic horizons and annual layer counting. The cores used are (chronologically from oldest data to newest): DSS Main DSS97 DSS0102 DSS0809 DSS0910 The dataset has 37 'missing' summer values in instances where insufficient ice core material was available. These missing summers have been filled using linear interpolation. This work forms part of Australian Antarctic Science (AAS) project no. 757. The record was published as an ENSO and eastern Australian rainfall proxy record in: Vance, T. R., T. D. van Ommen, M. A. J. Curran, C. T. Plummer, A. D. Moy, (2012): A millennial proxy record of ENSO and eastern Australian rainfall from the Law Dome ice core, East Antarctica. Journal of Climate, doi: 10.1175/JCLI-D-12-00003.1

AM01 borehole drilled January 2002. Partial annual data retrieved for 2002, and 2003. AM01b borehole drilled mid-December 2003. No new thermistor strings deployed. Consult Readme file for detail of data files and formats. New data and readme added July 2006.

AM01 borehole drilled January 2002. Samples collected during drilling and scientific sampling phases of work. AWS continuing to operate.

AM03 borehole drilled December 2005. Consult Readme file for detail of data files and formats. 2011-2012 data may be final data from the unit owing to battery failure. The original project for this dataset was ASAC 1164, but recent data fall under the auspices of project AAS 4096.

AM04 borehole drilled January 2006. Consult Readme file for detail of data files and formats. 2011-2012 data may be final data from the unit owing to battery failure. The original project for this dataset was ASAC 1164, but recent data fall under the auspices of project AAS 4096.

AM05 borehole drilled December 2009. Profiling measurements conducted to test borehole diameter integrity.

AM04 borehole drilled January 2006. Profiling measurements conducted to test borehole diameter integrity.

AM01 borehole drilled January 2002. AM01b borehole drilled mid-December 2003. No new thermistor strings deployed. Consult Readme file for detail of data files and formats. 2011-2012 data may be final data from the unit owing to battery failure. The original project for this dataset was ASAC 1164, but recent data fall under the auspices of project AAS 4096.

AM04 borehole drilled January 2006. Annual data retrieved for 2006, and 2007. Consult Readme file for detail of data files and formats. New data for 2011 was added in November of 2011.