Science, Tech, Math › Social Sciences Marine Isotope Stages Building A Paleoclimatic History of the World Share Flipboard Email Print Science Photo Library / STEVE GSCHMEISSNER / Getty Images Social Sciences Archaeology Basics Ancient Civilizations Excavations History of Animal and Plant Domestication Psychology Sociology Economics Environment Ergonomics Maritime By K. Kris Hirst Archaeology Expert M.A., Anthropology, University of Iowa B.Ed., Illinois State University K. Kris Hirst is an archaeologist with 30 years of field experience. Her work has appeared in scholarly publications such as Archaeology Online and Science. our editorial process Twitter Twitter K. Kris Hirst Updated November 04, 2019 Marine Isotope Stages (abbreviated MIS), sometimes referred to as Oxygen Isotope Stages (OIS), are the discovered pieces of a chronological listing of alternating cold and warm periods on our planet, going back to at least 2.6 million years. Developed by successive and collaborative work by pioneer paleoclimatologists Harold Urey, Cesare Emiliani, John Imbrie, Nicholas Shackleton, and a host of others, MIS uses the balance of oxygen isotopes in stacked fossil plankton (foraminifera) deposits on the bottom of the oceans to build an environmental history of our planet. The changing oxygen isotope ratios hold information about the presence of ice sheets, and thus planetary climate changes, on our earth's surface. How Measuring Marine Isotope Stages Work Scientists take sediment cores from the bottom of the ocean all over the world and then measure the ratio of Oxygen 16 to Oxygen 18 in the calcite shells of the foraminifera. Oxygen 16 is preferentially evaporated from the oceans, some of which falls as snow on continents. Times when snow and glacial ice buildup occur therefore see a corresponding enrichment of the oceans in Oxygen 18. Thus the O18/O16 ratio changes over time, mostly as a function of the volume of glacial ice on the planet. Supporting evidence for the use of oxygen isotope ratios as proxies of climate change is reflected in the matching record of what scientists believe the reason for the changing amount of glacier ice on our planet. The primary reasons glacial ice varies on our planet was described by Serbian geophysicist and astronomer Milutin Milankovic (or Milankovitch) as the combination of the eccentricity of Earth's orbit around the sun, the tilt of the Earth's axis and the wobble of the planet bringing the northern latitudes nearer to or farther from the sun's orbit, all of which changes the distribution of incoming solar radiation to the planet. Sorting Out Competing Factors The problem is, however, that although scientists have been able to identify an extensive record of global ice volume changes through time, the exact amount of sea level rise, or temperature decline, or even ice volume, is not generally available through measurements of isotope balance, because these different factors are interrelated. However, sea level changes can sometimes be identified directly in the geological record: for example, datable cave encrustations which develop at sea levels (see Dorale and colleagues). This type of additional evidence ultimately helps sorts out the competing factors in establishing a more rigorous estimation of past temperature, sea level, or the amount of ice on the planet. Climate Change on Earth The following table lists a paleo-chronology of life on earth, including how the major cultural steps fit in, for the past 1 million years. Scholars have taken the MIS/OIS listing well beyond that. Table of Marine Isotope Stages MIS Stage Start Date Cooler or Warmer Cultural Events MIS 1 11,600 warmer the Holocene MIS 2 24,000 cooler last glacial maximum, Americas populated MIS 3 60,000 warmer upper Paleolithic begins; Australia populated, upper Paleolithic cave walls painted, Neanderthals disappear MIS 4 74,000 cooler Mt. Toba super-eruption MIS 5 130,000 warmer early modern humans (EMH) leave Africa to colonize the world MIS 5a 85,000 warmer Howieson's Poort/Still Bay complexes in southern Africa MIS 5b 93,000 cooler MIS 5c 106,000 warmer EMH at Skuhl and Qazfeh in Israel MIS 5d 115,000 cooler MIS 5e 130,000 warmer MIS 6 190,000 cooler Middle Paleolithic begins, EMH evolves, at Bouri and Omo Kibish in Ethiopia MIS 7 244,000 warmer MIS 8 301,000 cooler MIS 9 334,000 warmer MIS 10 364,000 cooler Homo erectus at Diring Yuriahk in Siberia MIS 11 427,000 warmer Neanderthals evolve in Europe. This stage is thought to be the most similar to MIS 1 MIS 12 474,000 cooler MIS 13 528,000 warmer MIS 14 568,000 cooler MIS 15 621,000 ccooler MIS 16 659,000 cooler MIS 17 712,000 warmer H. erectus at Zhoukoudian in China MIS 18 760,000 cooler MIS 19 787,000 warmer MIS 20 810,000 cooler H. erectus at Gesher Benot Ya'aqov in Israel MIS 21 865,000 warmer MIS 22 1,030,000 cooler Sources Jeffrey Dorale of the University of Iowa. Alexanderson H, Johnsen T, and Murray AS. 2010. Re-dating the Pilgrimstad Interstadial with OSL: a warmer climate and a smaller ice sheet during the Swedish Middle Weichselian (MIS 3)? Boreas 39(2):367-376. Bintanja , R. "North American ice-sheet dynamics and the onset of 100,000-year glacial cycles." Nature volume 454, R. S. W. van de Wal, Nature, August 14, 2008. Bintanja, Richard. "Modelled atmospheric temperatures and global sea levels over the past million years." 437, Roderik S.W. van de Wal, Johannes Oerlemans, Nature, September 1, 2005. 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Age dating and the orbital theory of the ice ages: Development of a high-resolution 0 to 300,000-year chronostratigraphy. Quaternary Research 27(1):1-29. Suggate RP, and Almond PC. 2005. The Last Glacial Maximum (LGM) in western South Island, New Zealand: implications for the global LGM and MIS 2. Quaternary Science Reviews 24(16–17):1923-1940. Last Glacial Maximum - The Last Major Global Climate Change Bering Strait and the Bering Land Bridge The Next Ice Age Climate Change: The Archaeological Evidence Is There Any Upside to Global Warming? Paleoenvironmental Reconstruction A Overview of Global Warming An Overview of the Last Global Glaciation Clovis, Black Mats, and Extra-Terrestrials What Is Sea Level and How Is It Measured? A Geography and Overview of Earth's Arctic Region Antarctica: What's Beneath the Ice? Glacier Picture Gallery The Earth's 10 Biggest Mass Extinctions Tectonic Plates' Effect on Evolution What Is Physical Geography?