气候变化领域集成服务门户(CCPortal): Identification of atmospheric and oceanic teleconnection patterns in a 20-year global data set of the atmospheric water vapour column measured from satellites in the visible spectral range

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DOI	10.5194/acp-21-5315-2021
	Identification of atmospheric and oceanic teleconnection patterns in a 20-year global data set of the atmospheric water vapour column measured from satellites in the visible spectral range
	Wagner T.; Beirle S.; Dörner S.; Borger C.; Van Malderen R.
发表日期	2021
ISSN	1680-7316
起始页码	5315
结束页码	5353
卷号	21 期号:7
英文摘要	We used a global long-Term (1995-2015) data set of total column water vapour (TCWV) derived from satellite observations to quantify to which extent the temporal pat terns of various teleconnections can be identified in this data set. To our knowledge, such a comprehensive global TCWV data set was rarely used for teleconnection studies. One im portant property of the TCWV data set is that it is purely based on observational data. We developed a new empirical method to decide whether a teleconnection index is signifi cantly detected in the global data set. We compared our new method to well-established hypothesis tests and found good agreement with the results of our approach. Based on our empirical method more than 40 teleconnection indices were significantly detected in the global TCWV data set derived from satellite observations. In addition to the satellite data we also applied our method to other global data sets derived from ERA-Interim. One important finding is that the spatial patterns obtained for the ERA TCWV data are very similar to the observational TCWV data set indicating a high consis tency between the satellite and ERA data. Moreover, similar results are also found for two selections of ERA data (either all data or mainly clear-sky data). This finding indicates that the clear-sky bias of the satellite data set is negligible for the results of this study. However, for some indices, also system atic differences in the spatial patterns between the satellite and model data set were found probably indicating possi ble shortcomings in the model data. For most "traditional"teleconnection data sets (surface temperature, surface pres sure, geopotential heights and meridional winds at different altitudes) a smaller number of significant teleconnection in dices was found than for the TCWV data sets, while for zonal winds at different altitudes, the number of significant tele connection indices (up to > 50) was higher. The strongest teleconnection signals were found in the data sets of tro pospheric geopotential heights and surface pressure. In all global data sets, no "other indices"(solar variability, strato spheric AOD or hurricane frequency) were significantly de tected. Since many teleconnection indices are strongly corre lated, we also applied our method to a set of orthogonalised indices, which represent the dominant independent temporal teleconnection patterns. The number of significantly detected orthogonalised indices (20) was found to be much smaller than for the original indices (42). Based on the orthogo nalised indices we derived the global spatial distribution of the cumulative effect of teleconnections. The strongest effect on the TCWV is found in the tropics and high latitudes. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	data set; empirical analysis; satellite data; teleconnection; water vapor; zonal wind; Satellites
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246995
作者单位	Satellite Remote Sensing Group, Max Planck Institute for Chemistry, Mainz, Germany; KMI-IRM, Royal Meteorological Institute of Belgium, Brussels, Belgium
推荐引用方式 GB/T 7714	Wagner T.,Beirle S.,Dörner S.,et al. Identification of atmospheric and oceanic teleconnection patterns in a 20-year global data set of the atmospheric water vapour column measured from satellites in the visible spectral range[J],2021,21(7).
APA	Wagner T.,Beirle S.,Dörner S.,Borger C.,&Van Malderen R..(2021).Identification of atmospheric and oceanic teleconnection patterns in a 20-year global data set of the atmospheric water vapour column measured from satellites in the visible spectral range.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Wagner T.,et al."Identification of atmospheric and oceanic teleconnection patterns in a 20-year global data set of the atmospheric water vapour column measured from satellites in the visible spectral range".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).