1. Characterizing diurnal variations of the precipitable water vapor over the maritime continent of Indonesia from GPS and Altimetry measurements
- Author
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Wijaya, D., Kuntjoro, W., and Tanuwijaya, Z.
- Abstract
We used Global Positioning System (GPS) and Altimetry measurements to characterize the diurnal variations of the precipitable water vapor (PWV) over the maritime continent of Indonesia. Over the land, we derived the PWV values above 283 GPS receivers distributed over the country, while over the ocean, we utilized the on-board water vapor radiometer of TOPEX-JASON Altimetry missions. From the PWV time series, we estimated the phase and magnitude of the diurnal cycle using the least square adjustment. As for the PWV series derived by the TOPEX-JASON data, we applied the aliasing frequency in the adjustment.It is found that the magnitude of the diurnal variation over the land is larger than that over the ocean. A noticeable feature is that the PWV activity propagates toward the ocean between midnight and morning. This may correspond to the water vapor propagation toward the ocean, where over offshore regions, the convective dominantly occurs. A systematic modulation clearly dominates the diurnal variations that may correspond to intra-seasonal variability in the large-scale circulation pattern, with regimes associated with low-level easterlies or westerlies over the island., The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
- Published
- 2023
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