Assessment of Climate Change Based on Annual Trend and Change of Temperature in Manokwari, West Papua

Abstract

A simple climate change assessment is carried out on annual air temperatures including average, maximum and minimum temperatures in Rendani, Manokwari for the period of 1993-2019. Parametric linear regression and nonparametric Mann-Kendall trend test (MK), Modified Mann-Kendall (MMK), Sen's Slope Estimator (SSE)are used to analyze trends and index numbers for analyzing the temperature changes. Homogenity test is performed using double mass curve and assumption of normality in the distribution is also investigated to meet the requirements of the linear regression trend test. There as a significant upward trend in the mean and minimum temperature with a slope of 0.029ºC/year and 0.069ºC/year, respectively. Meanwhile, the maximum temperature test shows no trend with a slope of 0.009ºC/year. Analysis of temperature changes using index numbers shows an increase in annual average temperature of 2.8% or 0.7°C, maximum temperature of 1.2% or 0.4°C, and minimum temperature of 3.1% or 0.8°C. The increase in annual air temperature in Manokwari City can generally be caused by several factors such as El Nino phenomenon, urbanization, population growth, and deforestation.

Evaluation of Groundwater Availability for Rice during Period 2018-2022 in Tuban Regency, East Java

“…In this method, the groundwater storage capacity in a specific region with certain crop conditions is used to determine the level of groundwater, surplus, and deficit. The data used in this method include precipitation or rainfall (CH), potential evapotranspiration (ETP), actual evapotranspiration (ETA), groundwater content (KAT), surplus, and deficit [2]. Java Island represents the largest distribution for the agricultural sector in Indonesia, including Tuban Regency in East Java.…”