Decadal Rainfall Variability in the Drylands of East Nusa Tenggara

Abstract

Abstract The drylands of East Nusa Tenggara (NTT) experience a predominantly dry climate characterized by low annual rainfall, which presents significant challenges to agricultural productivity in the region. This work used the monthly Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) dataset from 1991 to 2020 to analyze decadal rainfall variability in NTT’s drylands. The analysis categorized the data into three ten-year periods (1991-2000, 2001-2010, 2011-2020) to identify patterns and trends over time. The results reveal notable fluctuations in rainfall, with marked changes observed over the past three decades. During the first decade (1991-2000), many areas experienced wet anomalies. In contrast, the second decade (2001-2010) was characterized by widespread dry anomalies across most of the region. Rainfall levels increased once more in the third decade (2011-2020). Additionally, the correlation between the El Niño-Southern Oscillation (ENSO) phenomenon and rainfall in this area is relatively low, suggesting that other factors may influence rainfall variability in NTT. Understanding the elements that contribute to rainfall variability in NTT’s drylands is essential for developing effective mitigation strategies against potential droughts and for promoting sustainable natural resource management in the region. The findings of this study could have a significant impact on policy-making and resource allocation, empowering stakeholders to make informed decisions.

Access to Document

Other files and links

• Link to publication in Scopus
• Open Access Version Available

Fingerprint