Ice Core Data
description
Transcript of Ice Core Data
CONNOR WALDRON + STEPHEN WALKERMRS. GEITHNER
P112/10 /12
Ice Core Data
Background Info
Ice core sample removed from ice sheetFrom the ice caps of Antarctica Greenland
or from high mountain glaciers (Citation 3).Lower layers are older than upper ice core
contains ice formed over a range of years (Citation 3).
Background Info Cont.
98% of Antarctic covered by the ice sheet 2,500 meters thick deepest location, 4,700 meters thick (Citation 3).
Ice sheet formed by accumulation of snow by drilling from the surface down we are drilling back in time.
Obtained with PICO electro-mechanical drill
How Does This Affect the Climate?
130,000-125,000 years ago warming period 1◦c-2◦c warmer than now called an inter-glacial (Citation 1).
120,000-20,000 years ago long cooling period called the Wisconsin Period last Great Ice Age (Citation 1).
19,000-15,000 years ago another warming period to next inter-glacial (which we are in) (Citation 1).
Inter Glacial today one of many reasons for global warming mostly due to humans
What are Isotopes?
Many quantities have been measured in ice cores to make conclusions about earths history such as oxygen isotope ratios carbon dioxide (citation 6). concentration methane concentration electrical conductivity and dust particle concentration.
Atoms of the same element have different numbers of neutrons The different possible versions of each element are called isotopes.
Two types O16 and O18 O16 reacts faster because O18 contains 2 more neutrons
Able to tell if climate changes whenO18 increases in ocean watersign of warming period
Carbon Dioxide
CO2 in the Ice Core RecordFor the first time in 400,000 yearsCO2 is at
390 parts per million continuing to rise at 2 parts per million (ppm) per year (Citation 5).
http://nicl-smo.unh.edu/video/index.shtml
Works Cited
Jouzel, J., R. D. Koster, R. J. Suozzo, G. L. Russell. 1994. Stable water isotope behavior during the last glacial maximum: A general circulation model analysis. Journal of Geophysical Research, 99: 25791-25802.
Antarctic Ice Cores and Environmental Change. Dr. T.H. Jacka, 1993. Web. 5 Dec. 2012. <http://www.chem.hope.edu/~polik/warming/IceCore/ IceCore2.html>.
"Ice Cores." Climate Data Information. N.p., 2010. Web. 6 Dec. 2012. <http://www.climatedata.info/Proxy/Proxy/icecores.html>.
"New Antarctic Ice Core Data: A Closer Look." New Ice Core Data: A Closer Look. N.p., 30 May 2000. Web. 6 Dec. 2012. <http://www.daviesand.com/Choices/ Precautionary_Planning/Closer_Look/index.html>.
"CO2 in the Ice Core Record." National Ice Core Laboratory Science Management Office. Dr. Richard Alley, n.d. Web. 10 Dec. 2012. <http://nicl-smo.unh.edu/video/index.shtml>.
"Isotopes." Isotopes and Radioactivity. N.p., n.d. Web. 10 Dec. 2012. <http://www.colorado.edu/physics/2000/isotopes/index.html>.