Interannual Rainfall Variability over Northwestern Jawa and its Relation to the Indian Ocean Dipole and El Niño-Southern Oscillation Events

• Hamada Jun-Ichi

  Research Institute for Global Change, JAMSTEC

• Mori Shuichi

  Research Institute for Global Change, JAMSTEC

• Kubota Hisayuki

  Research Institute for Global Change, JAMSTEC

• Yamanaka Manabu D.

  Research Institute for Global Change, JAMSTEC

• Haryoko Urip

  Agency for Meteorology, Climatology and Geophysics

• Lestari Sopia

  Agency for the Assessment and Application of Technology

• Sulistyowati Reni

  Agency for the Assessment and Application of Technology

• Syamsudin Fadli

  Agency for the Assessment and Application of Technology

Bibliographic Information

Other Title

• Interannual rainfall variability over northwestern Java and its relation to the Indian Ocean dipole and El Niño–Southern Oscillation events
• Differences of rainfall characteristics between coastal and interior areas of central western Sumatera, Indonesia

Abstract

Interannual rainfall variability over northwestern Jawa, Indonesia and its relation to the Indian Ocean Dipole (IOD) and El Niño-Southern Oscillation (ENSO) events were investigated using daily rainfall data for 1973-2008. IOD events clearly influence interannual rainfall variation in the dry season (May-October) in northwestern Jawa. Drought conditions during the dry season occur in conjunction with simultaneous development of positive IOD and El Niño events, whereas wet conditions tend to appear in negative IOD (with or without La Niña) rather than single La Niña events. During positive (negative) IOD years, cooler (warmer) sea surface temperature (SST) surrounds the maritime continent and large-scale divergence (convergence) and lower (higher) atmospheric water vapor content are observed. These conditions tend to suppress (induce) rainfall in northwestern Jawa. On the other hand, interannual rainfall variation in the rainy season (November-April) is not closely related to ENSO/IOD, but rainfall tends to be abundant in “neutral” (non-ENSO/IOD) years. This may be influenced by Northern Hemisphere winter monsoon strength and/or northerly (cold) surges. Furthermore, decreasing trends are detected for rainfall amounts and number of rainy days in the rainy season.

Journal

• SOLA

  SOLA 8 (0), 69-72, 2012

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390001205223067776
• NII Article ID: 130004940962
• DOI: 10.2151/sola.2012-018
• ISSN: 13496476
• Web Site: https://www.jstage.jst.go.jp/article/sola/8/0/8_2012-018/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed