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Tina Laboy came to CMMAP for the summer from Millersville University. She is a sophomore there majoring in meteorology with a minor in computer science. While at CMMAP, Tina worked under Professor Eric Maloney studying the Madden-Julian Oscillation (MJO).

The MJO is a cycle of anomalous tropical wind and precipitation that starts in the Indian Ocean and propagates eastward into the Pacific Ocean. Variability is dominated by 30-60 day timescales. The processes that cause the MJO to propagate eastward are not well understood. Maloney et al. (2010) argued that zonal moisture advection is important to the eastward propagation of the MJO, and that advection of anomalous humidity by the background low-level zonal wind is integral to this propagation.

In her summer research, Tina used NCEP reanalysis winds to show that MJO propagation does not speed up when background zonal winds in the warm pool increase. In fact, propagation speed and background low-level zonal winds are significantly negatively correlated. Further, she found that while the strength of intraseasonal zonal moisture advection increases with MJO amplitude, MJO amplitude and zonal moisture advection strength show no significant relationship to MJO propagation speed. Other factors such as surface evaporation anomalies may help mediate MJO propagation speed. Understanding MJO propagation could advance the MJO and tropical cyclone forecasts on weekly timescales.

Tina's research interests include hurricanes and radar. She enjoys movies, music, reading, singing, star-gazing, and, as no suprise, cloud-watching.

Tina's research poster, Investigating How Background State Affects The Propagation of The MJO, is here (12MB PDF).