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A Modeling Study Of The Influence Of Large Scale Wave Transport On Stratospheric Trace Gases
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Book Synopsis A Modeling Study of the Influence of Large Scale Wave Transport on Stratospheric Trace Gases by : Wanli Wu
Download or read book A Modeling Study of the Influence of Large Scale Wave Transport on Stratospheric Trace Gases written by Wanli Wu and published by . This book was released on 1996 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EOS Science Plan written by and published by . This book was released on 1999 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Atmospheric Transport in the Western Pacific Region by Measurements and Model Simulations by : Xiaoyu Sun
Download or read book The Atmospheric Transport in the Western Pacific Region by Measurements and Model Simulations written by Xiaoyu Sun and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major pathway for air entering the stratosphere is over the Tropical Western Pacific (TWP) region, and this key region influences the atmospheric composition in the stratosphere. Motivated by this, we used trace gas measurements by using the Fourier Transform Infrared (FTIR) Spectrometer and cirrus cloud measurements by using a ground-based COMpact Cloud Aerosol Lidar, COMCAL from the atmospheric observatory at Koror, Palau (7.34°N, 134.47°E}, in the heart of the Pacific warm pool) and combined model simulations to study the transport pathways, with a special focus on the stratosphere-troposphere exchange (STE) processes over this key region. The atmospheric transport dynamics in the TWP region are closely linked to the movements of the circulation system, particularly the Inter-Tropical Convergence Zone (ITCZ) associated with the up-welling branch of the Hadley cell. Given the limitations of traditional ITCZ indicators, such as the maximum tropical rain belt to determine the air mass origins, I have developed a tool termed the Chemical Equator (CE), modified from Hamilton et al., (2008) to study the Inter-hemispheric Transport (IHT). The CE is calculated by the model simulation of an artificial passive tracer by GEOS-Chem to discern the migration patterns of circulation systems and air mass origins. Subsequently, the CE was used to characterize tropospheric carbon monoxide (CO) and ozone (O3) column measurements using the FTIR Spectrometer and the ozone sondes, respectively. The observed low CO and O3 during summer and early autumn, contrasting with maxima in winter and early spring, were outlined by the seasonal meridian movement of the CE. Additionally, comparisons were made between CE and commonly used IHT indicators, such as satellite measurements of methane (CH4) and CO, and model simulations of sulfur hexafluoride (SF6). Particularly, the position of CE demonstrated agreement with the meridional gradient boundary of those trace gases. Consequently, the impact of IHT on the seasonal variation of the trace gases in the tropospheric TWP region suggests that CE holds the potential to differentiate diverse air mass origins influenced by large-scale atmospheric circulation. Upper-air observations targeting the Upper Troposphere and Lower Stratosphere (UTLS) were performed to detect cirrus cloud layers using Lidar, COMCAL. The annual cycle shows that cloud layer height peaks with the highest Cold Point Tropopause (CPT) in winter and reaches its minimum with the lowest CPT in summer. In comparison with similar cirrus cloud measurements obtained in other tropical sites, our measurements reveal that cirrus clouds detected over TWP are the coldest and highest. The prevalence of the coldest cirrus cloud layer detected over Palau corresponds to the cold trap, a region of exceptionally cold air, in UTLS over the TWP region. In order to build the relationship between STE in the UTLS region and measurements, we conducted trajectory analysis by Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model simulations based on cirrus cloud layer measurements. Our observation results reveal that only in winter with high supersaturation at the measured cirrus clouds, the air masses are further dehydrated and slowly ascend into the stratosphere. Conclusively, we present an atmospheric transport scheme over the TWP region based on horizontal IHT and vertical STE processes and provide observational and model simulation support for it. In the lower heights, from the surface to the free troposphere, the transport and air mass origins are characterized by the meridian movement of the CE. In the UTLS region, measurements of cloud layers and trajectories validate the pathways of STE. During summer, pristine air from the Pacific Ocean reaches Palau, with oceanic short-lived species injected into the stratosphere through rare and the highest overshooting tops. Conversely, Southeast Asia dominates air mass origins over the TWP region in winter, transporting a high level of anthropogenic species, such as O3 and CO, into the stratosphere via the pathway within the cold trap. This winter-specific cold trap pathway, seasonally persisting over Palau, plays a crucial role in altering the stratospheric atmosphere through the transport of troposphere-originate air masses.
Book Synopsis Scientific assessment of stratospheric ozone by :
Download or read book Scientific assessment of stratospheric ozone written by and published by . This book was released on 1990* with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Ozone, 1985: continued) Overview of atmospheric spectroscopy by :
Download or read book Atmospheric Ozone, 1985: continued) Overview of atmospheric spectroscopy written by and published by . This book was released on 1985 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Ozone, 1985: continued) Climatological means and variability of the middle atmosphere by :
Download or read book Atmospheric Ozone, 1985: continued) Climatological means and variability of the middle atmosphere written by and published by . This book was released on 1985 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Ozone, 1985 written by and published by . This book was released on 1986 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Ozone, 1985: Ozone reference profiles by :
Download or read book Atmospheric Ozone, 1985: Ozone reference profiles written by and published by . This book was released on 1985 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-12 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Programs by : National Science Foundation (U.S.)
Download or read book Guide to Programs written by National Science Foundation (U.S.) and published by . This book was released on 1994 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Curricula in the Atmospheric, Oceanic, Hydrologic, and Related Sciences by :
Download or read book Curricula in the Atmospheric, Oceanic, Hydrologic, and Related Sciences written by and published by . This book was released on 1998 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Middle Atmosphere written by PLUMB and published by Birkhäuser. This book was released on 2013-11-21 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: PAGEOPH, stratosphere, these differences provide us with new evidence, interpretation of which can materially help to advance our understanding of stratospheric dynamics in general. It is now weil established that smaller-scale motions-in particular gravity waves and turbulence-are of fundamental importance in the general circulation of the mesosphere; they seem to be similarly, if less spectacularly, significant in the troposphere, and probably also in the stratosphere. Our understanding of these motions, their effects on the mean circulation and their mutual interactions is progressing rapidly, as is weil illustrated by the papers in this issue; there are reports of observational studies, especially with new instruments such as the Japanese MV radar, reviews of the state of theory, a laboratory study and an analysis of gravity waves and their effects in the high resolution "SKYHI" general circulation model. There are good reasons to suspect that gravity waves may be of crucial significance in making the stratospheric circulation the way it is (modeling experience being one suggestive piece of evidence for this). Direct observational proof has thus far been prevented by the difficulty of making observations of such scales of motion in this region; in one study reported here, falling sphere observations are used to obtain information on the structure and intensity of waves in the upper stratosphere.
Book Synopsis Space Science in China by : Wen-Rui Hu
Download or read book Space Science in China written by Wen-Rui Hu and published by CRC Press. This book was released on 1997-08-20 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space science in China is one of the most active areas in modern science, and China has played a dynamic and steadily increasing role in this field since the 1960s. Until recently, however, activity in China was a mystery to the rest of the world. With the commercial importance of space, and the fact that space is now used as a "laboratory" to carry out various experiments, China has recently emerged as an important international competitor. Space Science in China provides a clear understanding of the latest research and progress in such wide-ranging areas as the development and research in solar-terrestrial science, space astronomy, geoscience, remote sensing, microgravity science, and life science.
Book Synopsis Scientific Assessment of Stratospheric Ozone, 1989 by :
Download or read book Scientific Assessment of Stratospheric Ozone, 1989 written by and published by . This book was released on 1990 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1990 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation- and Model-based Study of the Extratropical UT, LS by : Anne Kunz
Download or read book Observation- and Model-based Study of the Extratropical UT, LS written by Anne Kunz and published by Forschungszentrum Jülich. This book was released on 2010 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: