气候变化领域集成服务门户(CCPortal): Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon

CCPortal

DOI	10.1029/2019JD031565
	Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon
	Poler G.; Garcia R.F.; Bowman D.C.; Martire L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:6
英文摘要	The study of infrasound (acoustic) and gravity waves sources and propagation in the atmosphere of a planet gives us precious insight on atmosphere dynamics, climate, and even internal structure. The implementation of modern pressure sensors with high rate sampling on stratospheric balloons is improving their study. We analyzed the data from the National Aeronautics and Space Administration Ultra Long Duration Balloon mission (16 May to 30 June 2016). Here, we focus on the balloon's transit of the Andes Mountains. We detected gravity waves that are associated to troposphere convective activity and mountain waves. An increase of the horizontal wavelengths from 50 to 70 km with increasing distance to the mountains is favoring the presence of mountain waves. We also report on the detection of infrasounds generated by the mountains in the 0.01–0.1 Hz range with a pressure amplitude increase by a factor 2 relative background signal. Besides, we characterized the decrease of microbaroms power when the balloon was flying away from the ocean coast. These observations suggest, in a way similar to microseisms for seismometers, that microbaroms are the main background noise sources recorded in the stratosphere even far from the ocean sources. Finally, we observed a broadband signal above the Andes, between 0.45 and 2 Hz, probably associated with a thunderstorm. The diversity of geophysical phenomena captured in less than a day of observation stresses the interest of high rate pressure sensors on board long-duration balloon missions. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	microbaroms; mountain gravity waves; pressure sensor; stratospheric balloon; thunderstorm
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186107
作者单位	Institut Supérieur de l'Aéronautique et de l'Espace, ISAE-SUPAERO, Toulouse University, Toulouse, France; Sandia National Laboratories, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Poler G.,Garcia R.F.,Bowman D.C.,et al. Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon[J],2020,125(6).
APA	Poler G.,Garcia R.F.,Bowman D.C.,&Martire L..(2020).Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon.Journal of Geophysical Research: Atmospheres,125(6).
MLA	Poler G.,et al."Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon".Journal of Geophysical Research: Atmospheres 125.6(2020).