Examining the Connection between Guam's Seasonal Rainfall and the El-Nino Southern Oscillation 1950-2023

Guam has seen an increase in water demand resulting in a need for imports of fresh water. Annual rainfall is impacted by both tropical cyclones and interannual climate variability. This interannual variability is represented by the El Nino Southern Oscillation (ENSO). Different phases of ENSO may produce deviations from the expected precipitation pattern. Knowledge of this deviation, may assist planners in compensating for changes in water supply. This study will analyze monthly precipitation values from 1950 thru 2023 on Guam in comparison to the ENSO phase. Data will be aggregated into the four seasons to identify ENSO phase impacts on seasonal precipitation. Descriptive and inferential techniques, particularly ANOVA will be employed. In addition, a phase lag of one season will also be tested for its impact on precipitation. It is anticipated that results of the analysis will identify seasons of higher or lower precipitation depending on the current and possibly previous season ENSO phase.

Name thesis:degree_name

Masters of Applied Geography

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Applied Geography

Grantor

Texas State University

Year dc:date.issued

2025

Author dc:creator

• King, Christie Lee

Advisor dc:contributor.advisor

• Dixon, Richard W.

Committee member dc:contributor.committeemember

• Blanchard-Boehm, Denise

• Guam
• El-Nino
• ENSO
• rainfall
• El-Nino Southern Oscillation

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/10877/23612

OAI identifier oai:identifier

oai:digital.library.txst.edu:10877/23612