DOI: 10.1002/jgrd.50865
论文题名: The effect of the Madden-Julian Oscillation on station rainfall and river level in the Fly River system, Papua New Guinea
作者: Matthews A.J. ; Pickup G. ; Peatman S.C. ; Clews P. ; Martin J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10926
结束页码: 10935
语种: 英语
英文关键词: maritime continent
; MJO
; precipitation
; river flow
; station rainfall
; TRMM
Scopus关键词: Catchments
; Climatology
; Precipitation (chemical)
; Rain gages
; Rivers
; Satellites
; Intraseasonal variability
; Madden-Julian oscillation
; Maritime Continent
; MJO
; Precipitation measurement
; River flow
; TRMM
; Tropical rainfall measuring missions
; Rain
; Madden-Julian oscillation
; precipitation (climatology)
; rainfall
; river system
; satellite data
; seasonal variation
; time series
; Fly River
; Papua New Guinea
英文摘要: The Madden-Julian oscillation (MJO) is the dominant mode of intraseasonal variability in tropical rainfall on the large scale, but its signal is often obscured in individual station data, where effects are most directly felt at the local level. The Fly River system, Papua New Guinea, is one of the wettest regions on Earth and is at the heart of the MJO envelope. A 16 year time series of daily precipitation at 15 stations along the river system exhibits strong MJO modulation in rainfall. At each station, the difference in rainfall rate between active and suppressed MJO conditions is typically 40% of the station mean. The spread of rainfall between individual MJO events was small enough such that the rainfall distributions between wet and dry phases of the MJO were clearly separated at the catchment level. This implies that successful prediction of the large-scale MJO envelope will have a practical use for forecasting local rainfall. In the steep topography of the New Guinea Highlands, the mean and MJO signal in station precipitation is twice that in the satellite Tropical Rainfall Measuring Mission 3B42HQ product, emphasizing the need for ground-truthing satellite-based precipitation measurements. A clear MJO signal is also present in the river level, which peaks simultaneously with MJO precipitation input in its upper reaches but lags the precipitation by approximately 18 days on the flood plains. Key Points 40% difference in rainfall stations between wet and dry MJO in New Guinea Difference in station data is much higher than in satellite data River levels also respond strongly to MJO rainfall ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63289
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Centre for Ocean and Atmospheric Sciences, School of Mathematics, University of East Anglia, Norwich, United Kingdom; Consulting Geomorphologist, Sutton NSW, Australia; Ok Tedi Mining Limited, Tabubil, Papua New Guinea
Recommended Citation:
Matthews A.J.,Pickup G.,Peatman S.C.,et al. The effect of the Madden-Julian Oscillation on station rainfall and river level in the Fly River system, Papua New Guinea[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)