Powered by OpenAIRE graph
Found an issue? Give us feedback
addClaim

Further exploration of MJO initiation events and precursors as revealed by an MJO-like dynamical mode

Authors: Vargas-Martes, Rosa; Hartten, Leslie; McCaffrey, Katherine;

Further exploration of MJO initiation events and precursors as revealed by an MJO-like dynamical mode

Abstract

The Madden Julian Oscillation (MJO) is a tropical phenomenon that develops over the Indian Ocean as a large area of convection approximately 1000km across. This intraseasonal oscillation affects both weather and climate in extratropical regions, where most of the world's population resides. However, computational models do not represent the MJO adequately, and the scientific community has turned its attention to the MJO's initial stages. This research studies Primary MJO events (those arising in the absence of a pre-existing MJO signal) identified by four methods developed by previous researchers. Two of the methods focus mainly on precipitation while the other two focus on circulation. A multivariate MJO-like dynamical mode, obtained from unfiltered five-day-mean gridded data, was used to visualize the events during the 1998-2009 boreal winters. The contributions made to the MJO-like mode by the following variables were analyzed: outgoing long-wave radiation (OLR), sea level pressure (SLP), mid-tropospheric temperature (T400), and upper- and lower-level zonal winds (u200hPa and u850hPa). The mode was able to depict typical eastward-propagating events, and it was also able to show westwardpropagating and non-propagating events seen by other researchers. In addition, the mode depicts extratropical interactions and the areas of suppressed convection preceding events, as noted by previous studies. However, the mode did not represent the convection of all of the selected events. The study shows that the multivariate MJO-like dynamical mode was able to capture the complexity of MJO events, making it a useful tool for future MJO studies.

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Related to Research communities
Upload OA version
Are you the author of this publication? Upload your Open Access version to Zenodo!
It’s fast and easy, just two clicks!