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Orographic Effects of the New Guinea...
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Riley, Justin Gerard.
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Orographic Effects of the New Guinea Mountains on the Eastward Propagation and Rainfall of the 2007--08 Madden-Julian Oscillation.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Orographic Effects of the New Guinea Mountains on the Eastward Propagation and Rainfall of the 2007--08 Madden-Julian Oscillation./
作者:
Riley, Justin Gerard.
面頁冊數:
62 p.
附註:
Source: Masters Abstracts International, Volume: 55-02.
Contained By:
Masters Abstracts International55-02(E).
標題:
Physics. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1600619
ISBN:
9781339097138
Orographic Effects of the New Guinea Mountains on the Eastward Propagation and Rainfall of the 2007--08 Madden-Julian Oscillation.
Riley, Justin Gerard.
Orographic Effects of the New Guinea Mountains on the Eastward Propagation and Rainfall of the 2007--08 Madden-Julian Oscillation.
- 62 p.
Source: Masters Abstracts International, Volume: 55-02.
Thesis (M.S.)--North Carolina Agricultural and Technical State University, 2015.
This study investigates the orographic effects of the New Guinea Mountains on the eastward propagation of the Madden-Julian Oscillation (MJO) and the rainfall associated with it during the strong 2007-08 event (MJO07-08). The eastward propagation of the MJO has been observed in the Indian Ocean and the Western Pacific Ocean. The corresponding deep convection and near-surface wind anomalies appears to move around the mountainous island of New Guinea, instead of going over it. This event is simulated by a numerical weather prediction, the Advanced Research Weather Research and Forecasting (ARW-WRF), model with a single domain of 5 km grid resolution. The simulated flow and moisture fields resemble the observed fields reasonably well. The simulated results are then analyzed to investigate the orographic effects on the dominant MCS and the embedded cloud clusters when it passes over the mountains. This simulation demonstrates a strong orographic blocking on the MCS by the New Guinea Mountains, such as the weakening of the deep convection, prohibiting the MJO from propagating over the mountain continuously, and regeneration of MCS on the lee side. The simulation also shows that the MJO goes through three different stages during its propagation across the New Guinea Mountains. During each of these stages the convection associated with the MJO is weakened by the orographic effects of the New Guinea Mountains until the eastward propagation is not continuous and there is a decrease of the heavy rainfall that is associated with the MJO. We also show that the higher resolution data from our mesoscale simulation was better at capturing the MJO than the lower resolution reanalysis data that was used in some previous studies.
ISBN: 9781339097138Subjects--Topical Terms:
516296
Physics.
Orographic Effects of the New Guinea Mountains on the Eastward Propagation and Rainfall of the 2007--08 Madden-Julian Oscillation.
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This study investigates the orographic effects of the New Guinea Mountains on the eastward propagation of the Madden-Julian Oscillation (MJO) and the rainfall associated with it during the strong 2007-08 event (MJO07-08). The eastward propagation of the MJO has been observed in the Indian Ocean and the Western Pacific Ocean. The corresponding deep convection and near-surface wind anomalies appears to move around the mountainous island of New Guinea, instead of going over it. This event is simulated by a numerical weather prediction, the Advanced Research Weather Research and Forecasting (ARW-WRF), model with a single domain of 5 km grid resolution. The simulated flow and moisture fields resemble the observed fields reasonably well. The simulated results are then analyzed to investigate the orographic effects on the dominant MCS and the embedded cloud clusters when it passes over the mountains. This simulation demonstrates a strong orographic blocking on the MCS by the New Guinea Mountains, such as the weakening of the deep convection, prohibiting the MJO from propagating over the mountain continuously, and regeneration of MCS on the lee side. The simulation also shows that the MJO goes through three different stages during its propagation across the New Guinea Mountains. During each of these stages the convection associated with the MJO is weakened by the orographic effects of the New Guinea Mountains until the eastward propagation is not continuous and there is a decrease of the heavy rainfall that is associated with the MJO. We also show that the higher resolution data from our mesoscale simulation was better at capturing the MJO than the lower resolution reanalysis data that was used in some previous studies.
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