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An international team of researchers begins gathering in the Indian Ocean in October 2011 to study an atmospheric pattern that affects weather worldwide. The six-month field campaign, known as DYNAMO (Dynamics of the Madden-Julian Oscillation), will help improve long-range weather forecasts and seasonal outlooks, and enable scientists to further refine computer models of global climate. The MJO was first recognized as an important weather-maker pattern by NCAR scientists Roland Madden and Paul Julian in the 1970s.
All images with the UCAR copyright must be credited to UCAR and may be reproduced in news stories about NCAR & UCAR activities. High-resolution of the animation is available; please send a request to Carlye Calvin.
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Tropical weather maker in motion. The Madden-Julian Oscillation is a cyclical disturbance of the tropical atmosphere with pulses that typically originate in the Indian Ocean every 30 to 60 days and travel eastward. During each pulse of the MJO, regional westerly winds replace easterly trade winds near the surface, and showers and thunderstorms increase, particularly over regions of high sea surface temperatures in the Indian and western Pacific oceans. |
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 DYNAMO project logo (Dynamics of the Madden-Julian Oscillation)
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 NCAR's S-Pol radar sits atop its portable shipping containers, with towering cumulus in the background, on location in the Maldives during the DYNAMO project. (©UCAR, photo by Michael Dixon, NCAR. This image is freely available for media use. For more information, see Media & nonprofit use.*)
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 NCAR's S-Pol radar against brightly lit cumulus clouds, on location in the Maldives during the DYNAMO project. (©UCAR, photo by Michael Dixon, NCAR. This image is freely available for media use. For more information, see Media & nonprofit use.*)
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 S-Pol Radar (©UCAR, photo by Carlye Calvin. This image is freely available for media use. For more information, see Media & nonprofit use.*)
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 The Oceanographic Research Vessel MIRAI (Photo courtesy Japan Agency for Marine-Earth Science and Technology - JAMSTEC.)
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 Texas A&M SMART-Radar, (©UCAR, photo by Carlye Calvin. This image is freely available for media use. For more information, see Media & nonprofit use.*)
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*Media & nonprofit use of images: Except where otherwise indicated, media and nonprofit use permitted with credit as indicated above and compliance with UCAR's terms of use. Find more images in the UCAR Digital Image Library.
The University Corporation for Atmospheric Research manages the National Center for Atmospheric Research under sponsorship by the National Science Foundation. Any opinions, findings and conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
