Collaborative Research: Tropical waves and their effects on circulation from 3D GPS radio occultation sampling from stratospheric balloons in Strateole-2
合作研究:热带波及其对 Strateole-2 平流层气球 3D GPS 无线电掩星采样的环流影响
基本信息
- 批准号:1642650
- 负责人:
- 金额:$ 110.34万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-02-01 至 2025-01-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
The tropical upper troposphere and lower stratosphere are home to a variety of wave motions which play key roles in weather, climate, and atmospheric circulation. Waves which are broad (horizontal wavelengths spanning several degrees latitude) but shallow (vertical wavelengths of about one to four kilometers), generated by large areas of tropical convection, are the subject of this investigation. These waves are of interest for three reasons: first, the waves can induce the formation of cirrus clouds in the tropical tropopause layer (TTL), the transition zone between the troposphere and stratosphere that extends from about 14km to 18.5km. TTL cirrus can form as rising air motions associated with the waves depress air temperatures and cause water vapor to freeze out as cirrus ice crystals. The resulting clouds may be too thin to see from the ground or from satellites, yet they have an important climatic effect as they trap outgoing infrared radiation and thus warm the atmosphere. The prevalence of such clouds is difficult to quantify, and the relative importance of wave motions as a source of TTL cirrus, in comparison to cirrus formation due to outflow of ice particles from deep cumulus clouds, is not known.Second, the freezing out of water vapor by wave-induced temperature depression could be an important constraint on the amount of water vapor entering the stratosphere. The TTL is sometimes referred to as the "gateway to the stratosphere", as most of the water vapor in the stratosphere over the entire globe enters through the TTL. The stratosphere is extremely dry compared to the troposphere, but stratospheric water vapor is nevertheless important as it has a relatively strong greenhouse effect and can lead to the formation of the polar stratospheric clouds which are key to the formation of the ozone hole.Third, waves can transport momentum from the troposphere to the stratosphere, and wave momentum transport is the primary driver of the stratospheric Quasi-Biennial Oscillation (QBO), an alternation between easterly and westerly winds occurring over the global tropics with a cycling time in excess of two years. While the QBO is narrowly confined to the low-latitude stratosphere, it can influence weather and climate worldwide through its effects on prominent modes of climate variability such as the North Atlantic Oscillation. While the theory of wave momentum transport is well established, uncertainties remain as to the relative importance of different wave types in driving the QBO, and current weather and climate models have difficulty in simulating it.This project seeks to improve understanding of waves in the TTL by building and launching a balloon-borne instrument which receives positioning signals from satellites of the Global Navigation Satellite System (GNSS, which includes the GPS satellites launched by the US). The GNSS signals are refracted as they pass through the atmosphere, and the amount of refraction can be used to infer air temperature in the upper troposphere. Because the profiles are retrieved from the rising and setting, or occultation, of the GNSS satellites relative to the receiver, the balloon-borne instrument has the acronym ROC, for Radio OCcultation.ROC is developed for use on balloons flow as part of the Strateole-2 field campaign organized by the Centre National d'Etudes Spatiales (CNES), the French Space Agency, and the Laboratoire de Meteorologie Dynamic (LMD) of the University of Paris-Saclay. Strateole-2 is a five-year campaign, with a small validation deployment in 2018 and full science deployments in 2020-2021 and 2022-2023. Balloons are launched from the Seychelles (about 5S in the Indian Ocean), with the expectation that each balloon will circle the earth for up to 90 days and observe the TTL between 20S and 15N. This award supports US participation in the validation campaign and the first full science deployment, along with post-campaign analysis. It is one of three awards made to US PIs for participation in Strateole-2, the full set being AGS-1643022, AGS-1642277/1642246, and AGS-1642650/1653644. ROC is oriented to retrieve signals from GNSS satellites on either side of the balloon flight path, with observations taken between 8km and the flight level of about 20km and a vertical resolution between 200m and 250m. The observing geometry is such that observations at lower levels are farther away from the balloon, so that observations at 18, 15, and 12km altitude correspond to distances of roughly 100, 200, and 300km on either side of the balloon. The waves of interest have periods from hours to days and ROC can record two to three occultations per hour. Thus the three-dimensional structure of the waves is captured by the ROC measurements as the balloon advances along its trajectory.ROC is accompanied by two other instruments which provide complementary observations. One is the Balloonborne Cloud Overshoot Observation Lidar (BeCOOL), provided by the Laboratoire Atmospheres, Milieux, Observations Spatiales (LATMOS, a laboratory of the Institut Pierre Simon Laplace) in collaboration with CNES. The lidar provides measurements of cirrus clouds which can be combined with ROC observations to examine the role of wave motions in generating cirrus clouds. The other is the Temperature SENsor (TSEN), an instrument from LMD which records atmospheric temperature and pressure at the gondola. Gondola displacements are precisely determined by ROC, and TSEN observations are used to factor out gondola movement relative to the ambient wave motion (these are super-pressure balloons which fly at a level of constant density). The displacement data are then used to estimate the wave momentum flux at flight level associated with the large-scale waves observed by ROC.The work has scientific broader impacts due to the value of the observations for addressing a variety of questions regarding the effect of wave motions on TTL clouds, stratospheric humidity, and the QBO. Observations collected in this project will be made available to the research community from servers at the Laboratory for Atmospheric and Space Physics at the University of Colorado so that they can be freely examined by the research community. The project also engages undergraduate students through a research class, offered simultaneously at the University of California San Diego, the University of Arizona (UA), and the Autonomous University of Mexico (UNAM), in which students design a research project based on a test flight of ROC. The class is followed by undergraduate research internships at UCSD, UA, the Research Experiences in Solid Earth Sciences for Students (RESESS) program at UNAVCO (the University NAVSTAR Consortium, dedicated to applying GNSS technology to earth science), and the Significant Opportunities in Atmospheric Research and Science (SOARS) program of the University Corporation for Atmospheric Research. Beyond these broader impacts, the project supports two graduate students.
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Equatorial waves resolved by balloon-borne Global Navigation Satellite System radio occultation in the Strateole-2 campaign
- DOI:10.5194/acp-22-15379-2022
- 发表时间:2022-12
- 期刊:
- 影响因子:6.3
- 作者:B. Cao;J. Haase;M. Murphy;M. Alexander;M. Bramberger;A. Hertzog
- 通讯作者:B. Cao;J. Haase;M. Murphy;M. Alexander;M. Bramberger;A. Hertzog
Optimizing Simultaneous Water Level and Wave Measurements From Multi‐GNSS Interferometric Reflectometry Over 1 Year at an Exposed Coastal Site
在暴露的沿海地点优化多GNSS干涉反射仪的同步水位和波浪测量一年多
- DOI:10.1029/2022ea002767
- 发表时间:2023
- 期刊:
- 影响因子:3.1
- 作者:Sepúlveda, Ignacio;Cao, Bing;Haase, Jennifer S.;Murphy, Michael J.
- 通讯作者:Murphy, Michael J.
Around the World in 84 Days
- DOI:10.1029/2018eo091907
- 发表时间:2018-03
- 期刊:
- 影响因子:0
- 作者:J. Haase;M. Alexander;A. Hertzog;L. Kalnajs;T. Deshler;S. Davis;R. Plougonven;P. Cocquerez;Stéphanie Venel
- 通讯作者:J. Haase;M. Alexander;A. Hertzog;L. Kalnajs;T. Deshler;S. Davis;R. Plougonven;P. Cocquerez;Stéphanie Venel
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Jennifer Haase其他文献
Willentliches Vergessen – Voraussetzung für Flexibilität und Veränderungsfähigkeit in einer sich permanent verändernden Welt
Willentliches Vergessen – 在永久的世界中灵活地考虑和维护
- DOI:
10.1007/s11612-019-00466-0 - 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Arnulf Schüffler;C. Thim;Jennifer Haase;N. Gronau;A. Kluge - 通讯作者:
A. Kluge
Do Digital Jobs Need an Image Filter? Factors Contributing to Negative Attitudes
数字作业需要图像过滤器吗?
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
P. Hanel;G. L. Coelho;Jennifer Haase - 通讯作者:
Jennifer Haase
Jennifer Haase的其他文献
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{{ truncateString('Jennifer Haase', 18)}}的其他基金
Collaborative Research: Four-Dimensional (4D) Investigation of Tropical Waves Using High-Resolution GNSS Radio Occultation from Strateole2 Balloons
合作研究:利用 Strateole2 气球的高分辨率 GNSS 无线电掩星对热带波进行四维 (4D) 研究
- 批准号:
2402728 - 财政年份:2024
- 资助金额:
$ 110.34万 - 项目类别:
Continuing Grant
RAPID: Sentinel-1 and ALOS-2 InSAR interferograms to support community modeling, mapping, and estimation of hazards from strike-slip and thrust fault interactions in Haiti.
RAPID:Sentinel-1 和 ALOS-2 InSAR 干涉图支持对海地走滑和逆冲断层相互作用造成的危害进行群落建模、测绘和估计。
- 批准号:
2150704 - 财政年份:2021
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
Element: Data: HDR: Enabling data interoperability for NSF archives of high-rate real-time GPS and seismic observations of induced earthquakes and structural damage detection in OK
元素:数据:HDR:在 OK 中实现高速实时 GPS 和诱发地震地震观测以及结构损伤检测的 NSF 档案的数据互操作性
- 批准号:
1835372 - 财政年份:2018
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
US-France Workshop to Establish an International Collaboration for the Strateole-2 Campaign on Science of the Equatorial Upper Troposphere / Lower Stratosphere
美法研讨会为赤道对流层上层/平流层下层科学的Strateole-2运动建立国际合作
- 批准号:
1404241 - 财政年份:2014
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
RAPID: The GNSS Instrument System for Multistatic and Occultation Sensing (GISMOS) for Future Application to Precipitation Processes in Atmospheric River Events
RAPID:用于多基地和掩星传感 (GISMOS) 的 GNSS 仪器系统,用于未来应用于大气河流事件降水过程
- 批准号:
1454125 - 财政年份:2014
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
Climate Feedbacks in the Antarctic from Stratospheric Balloon GPS Radio Occultation Soundings
平流层气球 GPS 无线电掩星探测对南极气候的反馈
- 批准号:
1261680 - 财政年份:2012
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
Collaborative Research: Investigating the Characteristics of Lower Tropospheric Airborne GPS Radio Occultation Observations and Their Impact in Hurricane Studies
合作研究:调查低对流层机载 GPS 无线电掩星观测的特征及其对飓风研究的影响
- 批准号:
1301835 - 财政年份:2012
- 资助金额:
$ 110.34万 - 项目类别:
Continuing Grant
Climate Feedbacks in the Antarctic from Stratospheric Balloon GPS Radio Occultation Soundings
平流层气球 GPS 无线电掩星探测对南极气候的反馈
- 批准号:
1043676 - 财政年份:2011
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
Collaborative Research: Investigating the Characteristics of Lower Tropospheric Airborne GPS Radio Occultation Observations and Their Impact in Hurricane Studies
合作研究:调查低对流层机载 GPS 无线电掩星观测的特征及其对飓风研究的影响
- 批准号:
1015904 - 财政年份:2010
- 资助金额:
$ 110.34万 - 项目类别:
Continuing Grant
SGER: Antarctic GPS Radio Occultation Profiling from Stratospheric Balloons
SGER:平流层气球的南极 GPS 无线电掩星剖面
- 批准号:
0814290 - 财政年份:2008
- 资助金额:
$ 110.34万 - 项目类别:
Standard Grant
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Collaborative Research: Intertropical Convergence Zone Variations from Stable Oxygen Isotope Tree-ring Records in the Tropical Americas
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