DOI: 10.1126/science.1229881 , 940 (2013); 339 Science et al. Y. Fan Global Patterns of Groundwater Table Depth This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles ): February 25, 2013 www.sciencemag.org (this information is current as of The following resources related to this article are available online at http://www.sciencemag.org/content/339/6122/940.full.html version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/content/suppl/2013/02/20/339.6122.940.DC1.html can be found at: Supporting Online Material http://www.sciencemag.org/content/339/6122/940.full.html#ref-list-1 , 8 of which can be accessed free: cites 214 articles This article http://www.sciencemag.org/cgi/collection/geochem_phys Geochemistry, Geophysics subject collections: This article appears in the following registered trademark of AAAS. is a Science 2013 by the American Association for the Advancement of Science; all rights reserved. The title Copyright American Association for the Advancement of Science, 1200 New York Avenue NW, Washington, DC 20005. (print ISSN 0036-8075; online ISSN 1095-9203) is published weekly, except the last week in December, by the Science on February 25, 2013 www.sciencemag.org Downloaded from