- 著者
- Inovasita Alifdini Teruhisa Shimada
- 出版者
- 公益社団法人 日本気象学会
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- vol.18, pp.154-158, 2022 (Released:2022-07-17)
- 参考文献数
- 23
- 被引用文献数
- 2
This study investigates the diurnal variation of surface wind divergence in the seas of the Maritime Continent by using satellite scatterometer observations and atmospheric reanalysis data. This is the first study to demonstrate the distribution and seasonal variation of the diurnally varying surface winds in the Maritime Continent in terms of wind divergence. Wind divergence develops from the coasts of the islands toward the center of the seas and dominates during the afternoon and evening hours. Wind convergence dominates over the seas during the nighttime and morning hours. The offshore extensions of the wind divergence and convergence from the coast differ regionally and thus show the asymmetric patterns with respect to the center of the seas. In particular, strong wind divergence develops from the southern coasts of the Java Sea and the Arafura Sea to extend northward beyond the center of the seas. The diurnal amplitudes of wind divergence vary seasonally and reach a peak in September in most of the seas. The switching times between wind divergence and convergence are almost fixed throughout the year regardless of the monsoon reversal.
- 著者
- Inovasita Alifdini Teruhisa Shimada
- 出版者
- 公益社団法人 日本気象学会
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- pp.2022-025, (Released:2022-06-15)
- 被引用文献数
- 2
This study investigates the diurnal variation of surface wind divergence in the seas of the Maritime Continent by using satellite scatterometer observations and atmospheric reanalysis data. This is the first study to demonstrate the distribution and seasonal variation of the diurnally varying surface winds in the Maritime Continent in terms of wind divergence. Wind divergence develops from the coasts of the islands toward the center of the seas and dominates during the afternoon and evening hours. Wind convergence dominates over the seas during the nighttime and morning hours. The offshore extensions of the wind divergence and convergence from the coast differ regionally and thus show the asymmetric patterns with respect to the center of the seas. In particular, strong wind divergence develops from the southern coasts of the Java Sea and the Arafura Sea to extend northward beyond the center of the seas. The diurnal amplitudes of wind divergence vary seasonally and reach a peak in September in most of the seas. The switching times between wind divergence and convergence are almost fixed throughout the year regardless of the monsoon reversal.
- 著者
- Teruhisa Shimada
- 出版者
- Meteorological Society of Japan
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- vol.17, pp.191-195, 2021 (Released:2021-10-22)
- 参考文献数
- 18
This study investigated the distributions of strong surface winds in the vicinity of Cape Erimo and the synoptic conditions favorable for inducing the strong winds by using scatterometer wind measurements and atmospheric reanalysis data. The wind around Cape Erimo is highly constrained by the topography, and the prevailing wind directions are split between westerly to west-northwesterly winds during the cool season and the easterly to northeasterly winds during the warm season. The zonal wind components in the region surrounding Cape Erimo are significantly correlated with the east–west sea level pressure gradient, which works as an index for the strong winds in the vicinity of Cape Erimo. Using composite analysis based on the index, the following atmospheric fields are presented. The low-pressure system passing over the Okhotsk Sea induces the northwesterly winds to the south of Cape Erimo during the cool season. The well-organized southwesterly winds are observed in the east of Cape Erimo when the southwesterly winds dominate during the warm season. The low-pressure system passing over Japan enhances the easterly winds around Cape Erimo during the cool season. The developed Okhotsk high induces strong winds to the southwest of Cape Erimo during the warm season.
- 著者
- Teruhisa Shimada
- 出版者
- Meteorological Society of Japan
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- pp.2021-033, (Released:2021-09-29)
This study investigated the distributions of strong surface winds in the vicinity of Cape Erimo and the synoptic conditions favorable for inducing the strong winds by using scatterometer wind measurements and atmospheric reanalysis data. The wind around Cape Erimo is highly constrained by the topography, and the prevailing wind directions are split between westerly to west-northwesterly winds during the cool season and the easterly to northeasterly winds during the warm season. The zonal wind components in the region surrounding Cape Erimo are significantly correlated with the east–west sea level pressure gradient, which works as an index for the strong winds in the vicinity of Cape Erimo. Using composite analysis based on the index, the following atmospheric fields are presented. The low-pressure system passing over the Okhotsk Sea induces the northwesterly winds to the south of Cape Erimo during the cool season. The well-organized southwesterly winds are observed in the east of Cape Erimo when the southwesterly winds dominate during the warm season. The low-pressure system passing over Japan enhances the easterly winds around Cape Erimo during the cool season. The developed Okhotsk high induces strong winds to the southwest of Cape Erimo during the warm season.