globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0158.1
Scopus记录号: 2-s2.0-84962219210
论文题名:
Homogenized time series of the atmospheric water vapor content obtained from the GNSS reprocessed data
作者: Ning T.; Wickert J.; Deng Z.; Heise S.; Dick G.; Vey S.; Schöne T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:7
起始页码: 2443
结束页码: 2456
语种: 英语
Scopus关键词: Climate change ; Time series ; Water vapor ; Weather forecasting ; Atmospheric water vapor ; Correlation coefficient ; European centre for medium-range weather forecasts ; First order autoregressive ; Global Navigation Satellite Systems ; Integrated water vapors ; Radiosonde datas ; Temporal shifts ; Global positioning system ; climate change ; climatology ; data acquisition ; error correction ; GNSS ; GPS ; homogeneity ; meteorology ; time series ; water vapor ; weather forecasting
英文摘要: The potential temporal shifts in the integrated water vapor (IWV) time series obtained from reprocessed data acquired from global navigation satellite systems (GNSS) were comprehensively investigated. A statistical test, the penalized maximal t test modified to account for first-order autoregressive noise in time series (PMTred), was used to identify the possible mean shifts (changepoints) in the time series of the difference between the GPS IWV and the IWV obtained from the European Centre for Medium-Range Weather Forecasts (ECMWF) interim reanalysis (ERA-Interim) data. The approach allows for identification of the changepoints not only in the GPS IWV time series but also in ERA-Interim. The IWV difference time series formed for 101 GPS sites were tested, where 47 of them were found to contain in total 62 changepoints. The results indicate that 45 detected changepoints were due to the inconsistencies in the GPS IWV time series, and 16 were related to ERA-Interim, while one point was left unverified. After the correction of the mean shifts for the GPS data, an improved consistency in the IWV trends is evident between nearby sites, while a better agreement is seen between the trends from the GPS and ERA-Interim data on a global scale. In addition, the IWV trends estimated for 47 GPS sites were compared to the corresponding IWV trends obtained from nearby homogenized radiosonde data. The correlation coefficient of the trends increases significantly by 38% after using the homogenized GPS data. © 2016 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49986
Appears in Collections:气候变化事实与影响

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作者单位: Section 1.1: GPS/Galileo Earth Observation, GFZ German Research Centre for Geosciences, Potsdam, Germany; Section 1.2: Global Geomonitoring and Gravity Field, GFZ German Research Centre for Geosciences, Potsdam, Germany; Lantmäteriet (the Swedish Mapping Cadastre and Land Registration Authority), Gävle, Sweden

Recommended Citation:
Ning T.,Wickert J.,Deng Z.,et al. Homogenized time series of the atmospheric water vapor content obtained from the GNSS reprocessed data[J]. Journal of Climate,2016-01-01,29(7)
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