Measurement report: Immediate impact of the Taal volcanic eruption on atmospheric temperature observed from COSMIC-2 RO measurements

doi:10.5194/acp-2020-513

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-513
	Measurement report: Immediate impact of the Taal volcanic eruption on atmospheric temperature observed from COSMIC-2 RO measurements
	Saginela Ravindra Babu and Yuei-An Liou
	2020-07-01
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	For the first time after 43 years of its previous eruption in 1977, the Taal volcano in the Philippines (14° N, 120.59° E) erupted in the afternoon of 12 January, 2020. Interestingly, the Taal volcanic eruption was associated with a strong anticyclonic circulation at the upper levels over the western Pacific region in the northern hemisphere. As a result, the volcanic plumes were carried through the background upper level strong winds to the anticyclone over the Pacific Ocean within a few days following the eruption. In this study, the detailed vertical structure and the day-to-day temperature variability in response to the eruption is delineated by using high-resolution temperature measurements from the recently launched Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC)-2 radio occultation (RO) data. We describe the vertical temperature structure near (within 2 degree radius) and away (~ 5 degree radius) from the volcano during its intense eruption day (13 January 2020). A significant temperature inversion at ~ 15 km altitude is observed in the nearest temperature profiles (within 2 degree radius). Multiple tropopauses are evident in the temperature profiles that are available away from the volcano (~ 5 degree radius). The cloud top altitude of 15.2 km detected from the RO bending angle anomaly method is demonstrated. Furthermore, the diurnal temperature and relative humidity anomalies are estimated over ± 5° latitude and longitude radius from the volcano center and over the region of 10–20° N, 160–180° E with respect to the mean temperature of one week before the eruption. A persistent warming layer is observed at 16–19 km altitude range in both regions for several days after the eruption. A strong increase of ~ 50 % relative humidity at 15 km altitude is also noticed just after the eruption in the Taal volcano region. The present work shows the advantages and usefulness of the newly-launched COSMIC-2 data for near real-time temperature monitoring at shorter time scales with sufficient data.
领域	地球科学
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/281752
专题	地球科学
推荐引用方式 GB/T 7714	Saginela Ravindra Babu and Yuei-An Liou. Measurement report: Immediate impact of the Taal volcanic eruption on atmospheric temperature observed from COSMIC-2 RO measurements[J]. Atmospheric Chemistry and Physics,2020.
APA	Saginela Ravindra Babu and Yuei-An Liou.(2020).Measurement report: Immediate impact of the Taal volcanic eruption on atmospheric temperature observed from COSMIC-2 RO measurements.Atmospheric Chemistry and Physics.
MLA	Saginela Ravindra Babu and Yuei-An Liou."Measurement report: Immediate impact of the Taal volcanic eruption on atmospheric temperature observed from COSMIC-2 RO measurements".Atmospheric Chemistry and Physics (2020).