Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-855-2017 |
A comparison of Loon balloon observations and stratospheric reanalysis products | |
Friedrich, Leon S.1; McDonald, Adrian J.1; Bodeker, Gregory E.2; Cooper, Kathy E.3; Lewis, Jared2; Paterson, Alexander J.1 | |
2017-01-19 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | New Zealand; USA |
英文摘要 | Location information from long-duration superpressure balloons flying in the Southern Hemisphere lower stratosphere during 2014 as part of X Project Loon are used to assess the quality of a number of different reanalyses including National Centers for Environmental Prediction Climate Forecast System version 2 (NCEP-CFSv2), European Centre for Medium-Range Weather Forecasts (ERA-Interim), NASA Modern Era Retrospective-Analysis for Research and Applications (MERRA), and the recently released MERRA version 2. Balloon GPS location information is used to derive wind speeds which are then compared with values from the reanalyses interpolated to the balloon times and locations. All reanalysis data sets accurately describe the winds, with biases in zonal winds of less than 0.37ms (-1) and meridional biases of less than 0.08ms (-1). The standard deviation on the differences between Loon and reanalyses zonal winds is latitude-dependent, ranging between 2.5 and 3.5ms (-1), increasing equatorward. Comparisons between Loon trajectories and those calculated by applying a trajectory model to reanalysis wind fields show that MERRA-2 wind fields result in the most accurate simulated trajectories with a mean 5-day balloon-reanalysis trajectory separation of 621 km and median separation of 324 km showing significant improvements over MERRA version 1 and slightly outperforming ERA-Interim. The latitudinal structure of the trajectory statistics for all reanalyses displays marginally lower mean separations between 15 and 35 degrees S than between 35 and 55 degrees S, despite standard deviations in the wind differences increasing toward the equator. This is shown to be related to the distance travelled by the balloon playing a role in the separation statistics. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394445600002 |
WOS关键词 | SOUTHERN-HEMISPHERE ; VORTEX ; TEMPERATURES ; ACCURACY ; FLIGHTS ; FIELDS ; ECMWF ; ERA |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/26167 |
专题 | 地球科学 |
作者单位 | 1.Univ Canterbury, Dept Phys & Astron, Canterbury, New Zealand; 2.Bodeker Sci, Alexandra, New Zealand; 3.X Project Loon, 1600 Amphitheatre Pkwy, Mountain View, CA 94043 USA |
推荐引用方式 GB/T 7714 | Friedrich, Leon S.,McDonald, Adrian J.,Bodeker, Gregory E.,et al. A comparison of Loon balloon observations and stratospheric reanalysis products[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Friedrich, Leon S.,McDonald, Adrian J.,Bodeker, Gregory E.,Cooper, Kathy E.,Lewis, Jared,&Paterson, Alexander J..(2017).A comparison of Loon balloon observations and stratospheric reanalysis products.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Friedrich, Leon S.,et al."A comparison of Loon balloon observations and stratospheric reanalysis products".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
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