Image:Vostok 420ky 4curves insolation.jpg

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420,000 years of ice core data from Vostok, Antarctica research station.

Current period is at left.

From bottom to top:

Solar variation at 65°N due to Milankovitch cycles (connected to ¹⁸O).
¹⁸O isotope of oxygen gas.
Levels of methane (CH₄).
Relative temperature (converted from ²H isotope in ice).
Levels of carbon dioxide (CO₂).

[edit] Related images

Carbon dioxide, last 400kyr.	DO18 from EPICA and Vostok, last 40kyr.	From the Vostok and EPICA (Antarctica) and GRIP (Greenland) ice cores: d-o-18, last 140kyr.	From the Vostok and EPICA (Antarctica) and GRIP (Greenland) ice cores: d-o-18, last 40kyr.
As for Image:Epica-vostok-grip-40kyr.png but the green lines mark the temporal extent of the so-called Holocene Climatic Optimum.	This figure shows the variations in Earth's orbit, the resulting changes in solar energy flux at high latitude, and the observed glacial cycles.	Graph of Vostok CO2/T/dust from Petit 1999 paper.

[edit] Source

This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.

Note: This only applies to works of the Federal Government and not to the work of any individual US state, territory, commonwealth, county, subdivision, or municipality.

Source: http://www.usgcrp.gov/usgcrp/images/Vostok.jpg

File history

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(del) (cur) 06:03, 6 April 2005 . . SEWilco (Talk | contribs) . . 1600×1092 (193,421 bytes)
(del) (rev) 04:06, 4 April 2005 . . SEWilco (Talk | contribs) . . 1600×1092 (292,546 bytes) (420,000 years of ice core data from Vostok, Antarctica research station. Current period is at left. From bottom to top: * Solar variation at 65°N due to Milankovitch cycles (connected to <sup>18</sup>O). * <sub>18</sup>O isotope of [)