EMBARGOED—NOT FOR PUBLIC RELEASE BEFORE:
Monday, February 23, 2015
 3:00 PM US Eastern Standard Time
 8:00 PM Greenwich Mean Time
Tuesday, February 24, 2015
 5:00 AM Japanese Standard Time
 7:00 AM Australian Eastern Time
Global warming and global dryness
Model projections of carbon dioxide-induced global warming show that a robust narrowing
and deepening of the ascending branch of the Hadley Circulation, a component of global
atmospheric circulation, can drive a pattern of increased global dryness, suggesting an
association between greenhouse warming and recent prolonged worldwide droughts,
according to a study.
Article #14-18682: “Robust Hadley Circulation changes and increasing global dryness due to
CO2 warming from CMIP5 model projections,” by William K. M. Lau and Kyu-Myong Kim.
MEDIA CONTACT: William K. M. Lau, Earth System Science Interdisciplinary Center,
University of Maryland, College Park, MD; tel: 301-405-5395; e-mail: <wkmlau@umd.edu>
http://www.eurekalert.org/jrnls/pnas/14-18682.htm
AFTER THIS ARTICLE PUBLISHES, it will be available at
http://www.pnas.org/cgi/doi/10.1073/pnas.1418682112