Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"Madden-Julian Oscillation (MJO)"”.
-
Teleconnective Influences on the Strength of Post-tropical Cyclones
… how teleconnections such as the El Niño Southern Oscillation (ENSO), the Madden-Julian Oscillation (MJO), the Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) contribute to the strength of a transitioning post-tropical storm. T-tests performed show strong …
-
Long-range statistical forecasting of Korean summer precipitation
… El NinÌ o / La NinÌ a state. We found that the Madden-Julian Oscillation (MJO), when conditioned with our seasonal index, showed skill in forecasting with lead times out to 20 days. Last, we found that tropical cyclone activity in Korea is impacted by ENSO on the interannual scale, and MJO on …
-
The Effect of Orbital Forcing on the MJO’s Amplitude and Phase Speed
The Madden-Julian Oscillation (MJO) has a pronounced seasonal cycle, drifting from the Southern Hemisphere in boreal winter to the Northern Hemisphere in boreal summer, with a maximum intensity during boreal winter in the Southern Hemisphere. The reason for this maximum intensity during boreal …
-
Role of multiscale atmospheric conditions in the evolution of convective organization during MJO-1 of DYNAMO/CINDY/AMIE
… organization during a central Indian Ocean Madden-Julian Oscillation (MJO) event observed by the DYNAMO/CINDY/AMIE field campaigns in October 2011. Shifts in reflectivity and dual-polarization characteristics of four precipitation types over two time periods, at the beginning and end of the …
-
Radiative feedbacks in tropical organized convection and the Madden-Julian oscillation
… convection, radiative feedbacks, and the Madden-Julian oscillation (MJO) using a set of observation-derived data products, including retrievals using spaceborne satellites and ground-based precipitation radar, along with combined products and reanalyses. The main findings in each chapter …
-
Surface heat fluxes and MJO propagation through the Maritime Continent
… hurdle in understanding the propagation of the Madden-Julian Oscillation (MJO). To understand the differing dynamics of MJO events that propagate versus stall over the MC, a new MJO tracking algorithm utilizing 30-96 day filtered NOAA Interpolated OLR anomalies is presented. Using this …
-
The Study of the Indian Ocean Response to Climatic Events Using Satellite Observations and Model Simulations
… the Indian Ocean Dipole (IOD), El Niño-Southern Oscillation (ENSO), and the Madden-Julian Oscillation (MJO). Simple Ocean Data Assimilation (SODA) reanalysis of Sea Surface Salinity (SSS) from 1871-2008 is used to study the salinity variations during numerous phases of IOD events. The dynamics …
-
The Madden-Julian oscillation and nonlinear moisture modes
The Madden-Julian oscillation (MJO), the dominant tropical intraseasonal variability with widespread meteorological impacts, continues to puzzle the climate research community on both theoretical and modeling fronts. Motivated by a recent interest in the role of humidity in tropical dynamics, this …
-
The Madden-Julian Oscillation and the diurnal cycle over the Maritime Continent: scale interactions and modelling
… is within the convective region of the Madden-Julian Oscillation (MJO), which provides the greatest variability on intra-seasonal time scales: large-scale (�107 km2) active and suppressed convective envelopes propagate slowly (�5 m s-1) eastwards between the Indian and Pacific Oceans. …
-
Intra-seasonal oscillations of convection over southern Africa
… (OLR) index and P-E index. A longer 40-60 day oscillation or Madden Julian Oscillation (MJO) and a shorter 20-30 day ISO are identified. The interaction between the Rossby waves of the mid-latitudes and the MJO of tropics appears to be the main cause of the 20-30 day ISO operating over southern …
-
On intraseasonal variability in the tropics: tropical cyclones, the Madden-Julian Oscillation, and equatorial waves
… by tropical cyclones, equatorial waves, and the Madden-Julian Oscillation (MJO). Because these phenomena have significant societal impacts on sub-seasonal time scales, and it is important to understand how they interact with the large-scale atmosphere. The first part of this thesis develops …
-
Comparison of cloud systems simulated with two-dimensional and three-dimensional cloud resolving models
… were used to produce 30-day simulations of the Madden-Julian Oscillation (MJO) during the first month of the Dynamics of the Madden-Julian Oscillation (DYNAMO) field campaign (October 2011) to study the effects of dimensionality to increase understanding of convective cloud processes and the …
-
The Madden-Julian Oscillation and Convective Aggregation
The Madden-Julian oscillation (MJO) is a region of enhanced precipitation which forms every 30-60 days over the Indian Ocean and slowly propagates to the east over the Pacific. Despite being the dominant mode of intraseasonal variability in the tropical troposphere, most numerical models struggle …
-
Towards using neural networks for geoscientific discovery
… to a geoscientific dataset. For example, the Madden-Julian Oscillation was discovered through Fourier transforms of tropical time-series, while the defining structures of the Northern Hemispheric annular modes were first captured using principal component analysis. These discoveries rooted in …
-
Toward better subseasonal-to-seasonal prediction: physics-oriented model evaluation and predictability of tropical cyclones
… and improvement. My thesis first evaluated the Madden-Julian oscillation (MJO) - the dominant mode of tropical subseasonal variability and an important source of predictability on S2S timescales. Both the Navy Operational Global Atmospheric Prediction System (NOGAPS) and Global Forecasting …
-
Coupled Air-Sea-Land Interactions: Understanding the MJO Eastward Propagation and Maritime Continent Barrier Effect
The Madden-Julian oscillation (MJO) is the leading mode of tropical intraseasonal variability affecting the global weather and climate. The MJO is characterized by large-scale organized convection and its associated circulation that develops over the tropical Indian Ocean (IO) and propagates into …