globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL060818
论文题名:
Lunar gravitational atmospheric tide, surface to 50 km in a global, gridded data set
作者: Kohyama T.; Wallace J.M.
刊名: Geophysical Research Letters
ISSN: 0094-9548
EISSN: 1944-9279
出版年: 2014
卷: 41, 期:23
起始页码: 8660
结束页码: 8665
语种: 英语
英文关键词: atmospheric tides ; ERA-Interim reanalysis data ; lunar synodic cycle
Scopus关键词: Tides ; Time series ; Time series analysis ; Atmospheric tide ; Earth's surface ; FORECAST model ; Lunar synodic cycle ; Observational study ; Reanalysis ; Regression maps ; Robust patterns ; Moon ; amplitude ; atmospheric tide ; data set ; gravity field ; Moon ; time series ; wave propagation
英文摘要: The lunar gravitational semidiurnal atmospheric tide L2 is detected in the geopotential field in the ERA-Interim reanalysis by regressing the data for each of the four daily analysis times onto periodic lunar half-synodic cycle time series and differencing the resulting regression maps. A robust pattern dominated by zonal wave number 2 emerges, which agrees with tidal theory and with previous observational studies based on station data in terms of its amplitude, phase, and seasonality at the Earth's surface. Above the 100 hPa level, the tidal signal amplifies with height and it is downward propagating; below that level it is almost barotropic. The L2 signal is resolvable even in data for individual months of individual years. Monthly time series of tidal amplitude and phase exhibit a well-defined pattern of seasonality year after year. Since the ERA forecast model has no L2 gravitational forcing, the source of its L2 signal must be in the observations. © 2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921543630&doi=10.1002%2f2014GL060818&partnerID=40&md5=7f24fe5e01bed1c26a322b68259c77bc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6812
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Kohyama T.,Wallace J.M.. Lunar gravitational atmospheric tide, surface to 50 km in a global, gridded data set[J]. Geophysical Research Letters,2014-01-01,41(23).
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