Mesoscale variability of sea surface temperature in the North Atlantic
作者:
THOMAS VIEHOFF,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1989)
卷期:
Volume 10,
issue 4-5
页码: 771-785
ISSN:0143-1161
年代: 1989
DOI:10.1080/01431168908903918
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Analyses of mesoscale horizontal distributions of temperature were performed for an area of the North Atlantic using data from the NOAA-7 and NOAA-6 Advanced Very High Resolution Radiometer (AVHRR). The zonal and meridianal variance spectra have.slopes between —1.4 and —2.5 with a clear maximum at -2.0. This is also true for the direction-dependent structure functions. The isotropic part of the variance spectra has a mean slope of —2.2±0.17 at scales of 10— 100km; this lies between the slopes of -1 and —3 predicted by the theories of two-dimensional and geostrophic turbulence. A comparison between measurements and theories is difficult because of the insufficient applicability of these theories to boundary layers. Moreover, in some cases there are significant maxima in the variance spectra at scales between 50 km and 250 km.
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