DOI: 10.1002/jgrd.50811
论文题名: Space-time interpolation of satellite winds in the tropics
作者: Patoux J. ; Levy G.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 18 起始页码: 10405
结束页码: 10413
语种: 英语
英文关键词: interpolation
; scatterometer winds
Scopus关键词: Meteorological instruments
; Optimization
; Satellites
; Spectrum analysis
; Thermal stratification
; Tropics
; Wind
; Equatorial Pacific Ocean
; Optimal interpolation
; Satellite measurements
; Scatterometer winds
; Spatio-temporal averaging
; Stratified boundary layers
; Temporal and spatial
; Weather and climate models
; Interpolation
; boundary layer
; climate modeling
; interpolation
; optimization
; satellite data
; satellite imagery
; SeaWinds
; spatiotemporal analysis
; stratified flow
; surface wind
; tropical meteorology
; wind field
; Pacific Ocean
英文摘要: A space-time interpolator for creating average geophysical fields from satellite measurements is presented and tested. It is designed for optimal spatiotemporal averaging of heterogeneous data. While it is illustrated with satellite surface wind measurements in the tropics, the methodology can be useful for interpolating, analyzing, and merging a wide variety of heterogeneous and satellite data in the atmosphere and ocean over the entire globe. The spatial and temporal ranges of the interpolator are determined by averaging satellite and in situ measurements over increasingly larger space and time windows and matching the corresponding variability at each scale. This matching provides a relationship between temporal and spatial ranges, but does not provide a unique pair of ranges as a solution to all averaging problems. The pair of ranges most appropriate for a given application can be determined by performing a spectral analysis of the interpolated fields and choosing the smallest values that remove any or most of the aliasing due to the uneven sampling by the satellite. The methodology is illustrated with the computation of average divergence fields over the equatorial Pacific Ocean from SeaWinds-on-QuikSCAT surface wind measurements, for which 72 h and 510 km are suggested as optimal interpolation windows. It is found that the wind variability is reduced over the cold tongue and enhanced over the Pacific warm pool, consistent with the notion that the unstably stratified boundary layer has generally more variable winds and more gustiness than the stably stratified boundary layer. It is suggested that the spectral analysis optimization can be used for any process where time-space correspondence can be assumed. Key Points Interpolation of heterogeneous satellite data is optimizedSpatial and temporal ranges are chosen by matching variabilityIt has applicability to the assimilation of data in weather and climate models ©2013. American Geophysical Union. All Rights Reserved. 资助项目: ATM-0741832
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63294
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Atmospheric Sciences, University of Washington, 408 ATG Building, Seattle, WA 98195-1640, United States; NorthWest Research Associates, Redmond, WA, United States
Recommended Citation:
Patoux J.,Levy G.. Space-time interpolation of satellite winds in the tropics[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(18)