ANNUAL AND SEMI-ANNUAL VARIATIONS OF THE GPS-DERIVED PRECIPITABLE WATER VAPOR OVER SUMATRA ISLAND
| Autor: | Dudy D. Wijaya, Nabila S.E. Putri, Yan A. Rahmawan, Sidik T. Wibowo, Akhmad Y. Basuki, Muhammad S. Fathulhuda, Vera Sadarviana |
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| Rok vydání: | 2021 |
| Zdroj: | Jurnal Meteorologi dan Geofisika. 22:75 |
| ISSN: | 2527-5372 1411-3082 |
| DOI: | 10.31172/jmg.v22i2.835 |
| Popis: | We have utilized the Global Positioning System (GPS) data at 57 stations distributed over Sumatra Island to investigate spatio-temporal variations of the atmospheric precipitable water vapor (PWV). We focused on the annual and semi-annual cycles of the PWV. Our results show that Sumatra Island is divided into two distinct areas of annual and semi-annual cycles, where the boundary line between the areas is approximately at 2oS. While the annual cycle dominates the area over the southern side of 2oS, the semi-annual cycle is dominant over the northern side. Our results have further shown that the maximum phase of annual cycle occurs between January-March with considerably large amplitudes (10-15 mm). On the other side, the maximum phase of the semi-annual cycle in general occurs around November and May, whose amplitude is approximately between 1-5 mm. Our results are consistent with other results using rainfall data. |
| Databáze: | OpenAIRE |
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