Annals of Geophysics | 卷:57 |
Nowcasting the lightning activity in Peninsular Malaysia using the GPS PWV during the 2009 inter-monsoons | |
Mohd. Alauddin Mohd. Ali1  Wayan Suparta2  Ja’afar Adnan2  | |
[1] Universiti Kebangsaan Malaysia, Department of Elecrical, Electronic and System Engineering, Selagor,; | |
[2] Universiti Kebangsaan Malaysia, Space Science Centre (ANGKASA), Institute of Climate Change, 43600 Bangi, Selangor,; | |
关键词: GPS PWV; Lightning; SAFIR; Inter-monsoon; Nowcasting; | |
DOI : 10.4401/ag-6373 | |
来源: DOAJ |
【 摘 要 】
The spatial and temporal radio wave delay of the Global Positioning System (GPS) signal can be manipulated to estimate the precipitable water vapor (PWV) which favorable for meteorological applications. A rapid change of the water vapor amount was a precondition for the unbalanced atmospheric charges, which noticeably associated with the development of convective cloud as a lightning chamber. According to this fact, GPS derived PWV will be utilized to nowcasting the lightning event for the next couple of hours. The variances of PWV of four-selected station of the Peninsular Malaysia during the past two inter-monsoons events in May and November 2009 were analyzed. To clarify the response, the changes of PWV in hourly Δ (max-min) before the lightning event was investigated with minimum value 2 mm and is maintained at least three consecutive hours. There are 177 samples were extracted from this method and 69% of the sample showed the lightning occurrence with an average duration was after the six consecutive hours. The lightning day with 2 mm Δ was also higher than the fair weather of 6.3%. These findings suggest that the GPS data can be proposed further as a guide to nowcast the occurrence of lightning activity.
【 授权许可】
Unknown