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Climate signal mapping and an application to atmospheric tides
Author(s) -
Sherwood Steven C.
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011424
Subject(s) - tropopause , environmental science , atmospheric circulation , grid , general circulation model , meteorology , climatology , signal (programming language) , zonal and meridional , point (geometry) , remote sensing , geology , climate change , geodesy , troposphere , computer science , geography , mathematics , oceanography , programming language , geometry
When analyzing irregularly sampled data to obtain climate signals, a typical starting point is to use spatial analysis methods to map observations onto a regular grid. Clear benefits are possible, however, from an alternative approach in which the desired signals are first estimated directly at the observing locations. The most important benefits relate to accuracy and error analysis. These principles are illustrated using the example of atmospheric tides. When properly estimated, the tides agree remarkably well with those simulated by the Goddard Earth Observing System general circulation model and, above the tropopause, are comparable to the mean meridional flow.