期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 10, 页码 4173-4181出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL063856
关键词
GNSS meteorology; high-resolution tropospheric gradient; multiconstellation GNSS; numerical weather model; water vapor radiometer
资金
- National Natural Science Foundation of China [41474025]
The developing multi-Global Navigation Satellite Systems (GNSS) constellations have the potential to provide accurate high-resolution tropospheric gradients. Such data, closely linked to strong humidity gradients accompanying severe weather phenomena, are considered a new important data source for meteorological studies, e.g., nowcasting of severe rainfall events. Here we describe the development of a multi-GNSS processing system for the precise retrieval of high-resolution tropospheric gradients. The retrieved products were validated by using independent water vapor radiometer (WVR) observations and numerical weather model (NWM) data. The multi-GNSS high-resolution gradients agree well with those, derived from NWM and WVR, especially for the fast-changing peaks which were mostly associated with synoptic fronts. Compared to GPS-only gradients, the correlations with the validation data are significantly improved up to 20-35%. The new data product has significant potential to improve numerical weather prediction and to advance meteorological studies.
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