edu.ucar.opensky::articles:10879 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T13:38:30.274883 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7319wgv Understanding the drivers for the 20th century change of hydrogen peroxide in Antarctic ice-cores 2011-02-25T00:00:00Z publication https://n2t.org/ark:/85065/d7319wgv https://doi.org/10.1029/2010GL045992 Lamarque, Jean-François author McConnell, J. author Shindell, D. author Orlando, John J. author Tyndall, Geoffrey S. author UCAR/NCAR - Library publisher Observations and model simulations of an Antarctic ice-core record of hydrogen peroxide during the last ~150 years are analyzed. The observations indicate a relative increase in hydrogen peroxide by approximately 50% since 1900, with most of the change since the early 1970s. Using two model simulations spanning 1850 to present, we show that the modeled relative change in annual-mean surface hydrogen peroxide parallels the equivalent signal from the ice core record. In addition, we show that this relative change can be explained by the relative changes in tropospheric ozone concentration and mostly in ozone photolysis rates ( J(O ¹D)). The simulated signal is therefore intimately related to the changes in stratospheric ozone associated with increases in chlorofluorocarbons; this is further demonstrated using total ozone column observations and the associated observed change in ice-core hydrogen peroxide. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2011 American Geophysical Union. None eng geoscientificInformation