Date of Award
January 2017
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Atmospheric Sciences
First Advisor
Dr. Jianglong Zhang
Abstract
Using ground-based observations, as well as reanalysis and Coupled Model Intercomparison Project Phase 5 (CMIP5) data, the long-term changes in precipitation and surface temperature are studied for the Northern Great Plains (NGP) region for the period of 1965-2005. Significant positive trends of ~1-2 °C/41 years in annual mean temperature are found across North Dakota and Minnesota. This study also suggests that the eastern part of the NGP region is wetter than the western part of the NGP, for the past 41 years. In addition, the spatial-temporal changes of precipitation and temperature of the region, as well as their linkages to Multivariate El-Niño-Southern Oscillation (ENSO) Index (MEI), are investigated through empirical orthogonal function (EOF) analysis using reanalysis and CMIP5 data. The NGP’s temperature field exhibits larger increasing trends in the winter season, while the largest variations in precipitation are found for the summer season. This study further indicates that MEI is positively correlated with winter temperature in North Dakota, and ENSO could also be associated with variations in summer precipitation of the NGP region.
Recommended Citation
Sampath, Akila, "An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains" (2017). Theses and Dissertations. 2143.
https://commons.und.edu/theses/2143