File:Vostok Petit data.svgData sets used are: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/co2nat
File:Vostok-ice-core-petit.pngfrom the Vostok, Antarctica ice core as reported by Petit et al., 1999. Higher dust levels are believed to be caused by cold, dry periods. Data from: http://www
File:Vostok Petit data hu.svg This image is a derivative work of the following images: File:Vostok_Petit_data.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2011-09-25T17:39:49Z Hel-hama
File:Vostok Petit data-ml.svg This image is a derivative work of the following images: File:Vostok_Petit_data.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2011-09-25T17:39:49Z Hel-hama