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 10 of 10 for “"Sub-Seasonal"”.
-
A multi-scale modeling study of the impact of land surface heterogeneity on the convective boundary layer in the U.S. Midwest
… class in the U.S. Midwest. The interannual and sub-seasonal climate variability of this region are determined by atmospheric oscillations on multiple temporal and spatial scales. The principal factors contributing to the growing season rainfall in the U.S. Midwest include synoptic scale moisture …
-
Advancing Climate Science with Machine Learning
… The second climate problem that we target is sub-seasonal forecasting (SSF), the prediction of key climate variables, e.g., temperature and precipitation, on a 2-week to 2-month horizon. We investigate 10 machine learning models on SSF over the contiguous United States (U.S.). The experimental …
-
On intraseasonal variability in the tropics: tropical cyclones, the Madden-Julian Oscillation, and equatorial waves
… addresses some aspects of tropical intraseasonal variability, which is dominated 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 …
-
Surface-Atmosphere coupling over the central Arctic Ocean
… future climate changes and to produce improved seasonal and sub-seasonal mid-latitude weather forecasts. Both climate and numerical weather prediction models currently perform poorly over the Arctic region, especially in their representation of cloud occurrence, cloud radiative and microphysical …
-
Drivers of short-term variability in phytoplankton production in an embayment of the southern Benguela upwelling system: an observational and modelling study
… that are difficult to predict given the high sub-seasonal variability that characterises this region. To better understand this variability, net primary production (NPP), nitrate and ammonium uptake, and phytoplankton community composition were measured for ten days during the upwelling season …
-
Timescales of processes controlling water vapour entry to the stratosphere
… Expanding on earlier studies, the impact of sub-seasonal temperature variability on stratospheric water vapour is quantified in reanalysis and in one global climate model where it is found to be under-represented. Following on, the next chapter investigates the substantial interannual …
-
Approaching Arctic-midlatitude dynamics from a two-way feedback perspective
… from a two-way feedback perspective, mostly on sub-monthly timescales. Particular emphasis is placed on the influence of midlatitude circulation variability upon the Arctic, as this direction of influence is less-studied than the converse pathway. Reinforcing feedback loops are identified …
-
Subseasonal to seasonal prediction and predictability of extreme and severe weather
… of extreme and severe weather on the sub-seasonal to seasonal (S2S) timescale while exploring physical mechanisms that result in successful statistical prediction of atmospheric blocking, extreme temperatures, and severe weather activity. Successful prediction of extremes on the S2S …
-
The impact of submesoscales on the stratification dynamics in the Southern Ocean
Submesoscale dynamics O(1-10 km, hours to days) are considered to strongly affect the stratification of the upper ocean. In the Southern Ocean, studies of submesoscale dynamics are biased to regions preconditioned for strong frontal activity and topographical influence. This dissertation considers …