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- W2384941739 abstract "Using the NCEP/NCAR reanalysis and in situ precipitation data from 1979 to 2009, the authors have investigated the climatological characteristics of Low-Frequency Oscillation(CLFO) in Maritime Continent Regions(MC) and their association with the precipitation disturbances in China. Our results demonstrate that climatologically, the apparent LFO exists in MC with a period of 30~60 days as derived from Outgoing Long-wave Radiation data from April to September. During the period from phases 1 to 4(5 to8) of the Low-Frequency, the variations of OLR in MC show that the convection in MC is relatively weak(active). The climatological low frequency OLR is found to propagate eastward in the tropics, and also has a phase propagation in the meridional direction. The wave train-like pattern is found from MC to the Philippine islands and then the Yangtze River in China and across the South China Sea, which looks similar to the EAP or P-J teleconnection. The Low-Frequency circulations and heating disturbances in different phases suggest some linkages between the CLFO in MC and the precipitation disturbances in China during the period from April to September. In the peak phase, the low-frequency convection is relatively weak due to divergence in the lower troposphere along with convergence in the upper troposphere, which excites the EAP wave train from MC to the Sea of Japan. The South Asia high shifts eastward due to the low-frequency anticyclone in southern China. As a result, less precipitation is observed in both the south of Changjiang River valley and Hetao area in China. More precipitation is found in southwestern China, Qinghai and Gansu provinces. In the transition phase from the valley to the peak of CLFO of OLR, the low-frequency cyclone-anticyclone-cyclone wave train is also be excited, resulting in South Asia high shifting southwestward. The convergence takes place in the upper and middle reaches of Yangtze River and Jilin Area, which facilitates more rainfall in these regions. Meanwhile, less rainfall is received in the Yellow-Huaihe River Valley and the Yunnan-Guizhou Plateau. The results aforementioned will be helpful for better understanding of the climatological low-frequency oscillations along with the phenomenon of seasonal phase lock of LFO, and will also be useful for better understanding of the precipitation changes in some regions in China in boreal summer." @default.
- W2384941739 created "2016-06-24" @default.
- W2384941739 creator A5047738309 @default.
- W2384941739 date "2013-01-01" @default.
- W2384941739 modified "2023-09-26" @default.
- W2384941739 title "THE CLIMATOLOGICAL LOW-FREQUENCY OSCILLATIONS IN MARITIME CONTINENT REGION AND THEIR POSSIBLE RELATIONS WITH PRECIPITATION CHANGES IN CHINA" @default.
- W2384941739 hasPublicationYear "2013" @default.
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