首页 | 本学科首页   官方微博 | 高级检索  
     检索      

Planetary-Scale Wave Structures of the Earth’s Atmosphere Revealed from the COSMIC Observations
作者姓名:S. K. A. V. Prasad Rao ANISETTY  P. S. BRAHMANANDAM  G. UMA  A. Narendra BABU  HUANG Ching-Yuang  G. Anil KUMAR  S. Tulasi RAM  WANG Hsiao-Lan  CHU Yen-Hsyang
作者单位:Department of Atmospheric Sciences, National Central University, Chung-Li 32001, Taiwan, China;Institute of Space Science, National Central University, Chung-Li 32001, Taiwan, China;Department of Electronics and Communication Engineering, Koneru Lakshmmaih University, Vaddeswaram 522540, India;Department of Electronics and Communication Engineering, Lakkireddy Bali Reddy Engineering College, Mylavaram 521230, India;Department of Atmospheric Sciences, National Central University, Chung-Li 32001, Taiwan, China;Department of Physics, K L University, Vaddeswaram 522540, India;Indian Institute of Geomagnetism, New Panvel, Navi Mumbai 410218, India;Department of Atmospheric Sciences, National Central University, Chung-Li 32001, Taiwan, China;Institute of Space Science, National Central University, Chung-Li 32001, Taiwan, China
基金项目:Supported by the Science Council of Taiwan (NSC-101-2811-M-008-012).
摘    要:GPS radio occultation(GPS RO) method,an active satellite-to-satellite remote sensing technique,is capable of producing accurate,all-weather,round the clock,global refractive index,density,pressure,and temperature profiles of the troposphere and stratosphere.This study presents planetary-scale equatorially trapped Kelvin waves in temperature profiles retrieved using COSMIC(Constellation Observing System for Meteorology,Ionosphere,and Climate) satellites during 2006-2009 and their interactions with background atmospheric conditions.It is found that the Kelvin waves are not only associated with wave periods of higher than 10 days(slow Kelvin waves) with higher zonal wave numbers(either 1 or 2),but also possessing downward phase progression,giving evidence that the source regions of them are located at lower altitudes.A thorough verification of outgoing longwave radiation(OLR) reveals that deep convection activity has developed regularly over the Indonesian region,suggesting that the Kelvin waves are driven by the convective activity.The derived Kelvin waves show enhanced(diminished) tendencies during westward(eastward) phase of the quasi-biennial oscillation(QBO) in zonal winds,implying a mutual relation between both of them.The El Nino and Southern Oscillation(ENSO) below 18 km and the QBO features between 18 and 27km in temperature profiles are observed during May 2006-May 2010 with the help of an adaptive data analysis technique known as Hilbert Huang Transform(HHT).Further,temperature anomalies computed using COSMIC retrieved temperatures are critically evaluated during different phases of ENSO,which has revealed interesting results and are discussed in light of available literature.

关 键 词:宇宙观测  行星尺度  地球大气层  波结构  希尔伯特黄变换  开尔文波  温度分布  数据分析技术
收稿时间:2013/7/31 0:00:00
修稿时间:2013/10/22 0:00:00

Planetary-scale wave structures of the earth’s atmosphere revealed from the COSMIC observations
S. K. A. V. Prasad Rao ANISETTY,P. S. BRAHMANANDAM,G. UMA,A. Narendra BABU,HUANG Ching-Yuang,G. Anil KUMAR,S. Tulasi RAM,WANG Hsiao-Lan,CHU Yen-Hsyang.Planetary-scale wave structures of the earth’s atmosphere revealed from the COSMIC observations[J].Acta Meteorologica Sinica,2014,28(2):281-295.
Authors:S K A V Prasad Rao ANISETTY  P S BRAHMANANDAM  G UMA  A Narendra BABU  HUANG Ching-Yuang  G Anil KUMAR  S Tulasi RAM  WANG Hsiao-Lan and CHU Yen-Hsyang
Institution:1. Department of Atmospheric Sciences, National Central University, Chung-Li, 32001, Taiwan, China
2. Institute of Space Science, National Central University, Chung-Li, 32001, Taiwan, China
3. Department of Electronics and Communication Engineering, Koneru Lakshmmaih University, Vaddeswaram, 522540, India
4. Department of Electronics and Communication Engineering, Lakkireddy Bali Reddy Engineering College, Mylavaram, 521230, India
5. Department of Physics, K L University, Vaddeswaram, 522540, India
6. Indian Institute of Geomagnetism, New Panvel, Navi Mumbai, 410218, India
Abstract:GPS radio occultation (GPS RO) method, an active satellite-to-satellite remote sensing technique, is capable of producing accurate, all-weather, round the clock, global refractive index, density, pressure, and temperature profiles of the troposphere and stratosphere. This study presents planetary-scale equatorially trapped Kelvin waves in temperature profiles retrieved using COSMIC (Constellation Observing System for Meteorology, Ionosphere, and Climate) satellites during 2006–2009 and their interactions with background atmospheric conditions. It is found that the Kelvin waves are not only associated with wave periods of higher than 10 days (slow Kelvin waves) with higher zonal wave numbers (either 1 or 2), but also possessing downward phase progression, giving evidence that the source regions of them are located at lower altitudes. A thorough verification of outgoing longwave radiation (OLR) reveals that deep convection activity has developed regularly over the Indonesian region, suggesting that the Kelvin waves are driven by the convective activity. The derived Kelvin waves show enhanced (diminished) tendencies during westward (eastward) phase of the quasi-biennial oscillation (QBO) in zonal winds, implying a mutual relation between both of them. The El Niño and Southern Oscillation (ENSO) below 18 km and the QBO features between 18 and 27 km in temperature profiles are observed during May 2006–May 2010 with the help of an adaptive data analysis technique known as Hilbert Huang Transform (HHT). Further, temperature anomalies computed using COSMIC retrieved temperatures are critically evaluated during different phases of ENSO, which has revealed interesting results and are discussed in light of available literature.
Keywords:radio occultation technique  Kelvin waves  outgoing long-wave radiation (OLR)  quasi-biennial oscillation (QBO)  El Niñ  o and Southern Oscillation (ENSO)
本文献已被 CNKI 维普 SpringerLink 等数据库收录!
点击此处可从《Acta Meteorologica Sinica》浏览原始摘要信息
点击此处可从《Acta Meteorologica Sinica》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号