Academic journal article Borneo Research Bulletin

The Relationships between Large-Scale Atmospheric Circulation and Surface Climate: A Case Study for Borneo

Academic journal article Borneo Research Bulletin

The Relationships between Large-Scale Atmospheric Circulation and Surface Climate: A Case Study for Borneo

Article excerpt

The principal aim of this project is to relate the large-scale atmospheric circulation (of Southeast Asian region) to the surface environmental elements of Borneo (especially the local climate). The understanding of the climatic processes that link these two aspects serves as the key theoretical basis. The two most significant synoptic forcings [thus] affecting the surface climatic elements of Borneo are the monsoon and the El Nino Southern Oscillation [ENSO], which are mutually interactive.

Three stages of analyses were involved. Borneo was first divided into six climatic subdivisions according to similarity in surface climate. The long-term characteristics and trends for the local climate were then evaluated based on these climatic groups. This first stage also included the task to develop daily weather types (WTs) based on precipitation and temperature variability. The second stage was synoptic typing, which attempted to classify the large-scale atmospheric circulation (which consist of both monsoon and ENSO signals) into a few identifiable modes that can explicitly represent physical reality. The final stage was to establish relationships and tele-connections with surface environmental elements: i.e. precipitation and temperature. There are three main typing schemes developed in this thesis- i. …

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