Comparison of Precipitable Water Vapor and Sea Surface Temperature Anomalies Over the Tanay and Legazpi, Philippines from 2013 to 2022

Precipitable Water Vapor (PWV) is a meteorological parameter used to characterize the amount of Integrated Water Vapor (IWV) present in vertical column of the atmosphere. The El Nino Southern Oscillation (ENSO) is a meteorological phenomenon that causes weather variability. ENSO is categorized as a warm phase and a cold phase, which are El Nino and La Nina, respectively. The impact of ENSO is not uniform and varies, so predicting and understanding its influence requires taking into account meteorological variables and their connection with it. This paper presents the analysis of the Precipitable Water Vapor anomaly (PWVa) and Sea Surface Temperature anomaly (SSTa) from 2013 to 2022 using radiosondes Precipitable Water Vapor (PWV) over Tanay (14.5797° N, 121.3313° E), and Legazpi (13.1506° N, 123.7283° E) from the Integrated Global Radiosonde Archive (IGRA) and Sea Surface Temperature (SST) from the National Oceanic and Atmospheric Administration (NOAA). The anomaly method was used for the PWV and SST values to calculate the PWVA and SSTa. Through the PWV radiosonde data over Tanay and Legazpi from 2013 to 2022, this study investigates the PWVa and SSTa. Moreover, the PWVa shows variation during the identified ENSO events from 2013 to 2022. A high standard deviation was found in Legazpi compared to Tanay, which is attributed to its location and distance to the sea. The negative correlation indicates the PWVa increases as the SSTa decreases, while the SSTa increases while the PWVa decreases, relative to the La Nina and El Nino events. Additional stations and a long-term analysis of the PWVa and SSTa are proposed for future studies to explore and refine our understanding of these relationships for improved forecasting and climate modeling purposes.