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Rescue and quality control of historical geomagnetic measurement at Sheshan observatory, China
Earth System Science Data ( IF 11.2 ) Pub Date : 2022-11-24 , DOI: 10.5194/essd-14-5195-2022 Suqin Zhang , Changhua Fu , Jianjun Wang , Guohao Zhu , Chuanhua Chen , Shaopeng He , Pengkun Guo , Guoping Chang
Earth System Science Data ( IF 11.2 ) Pub Date : 2022-11-24 , DOI: 10.5194/essd-14-5195-2022 Suqin Zhang , Changhua Fu , Jianjun Wang , Guohao Zhu , Chuanhua Chen , Shaopeng He , Pengkun Guo , Guoping Chang
The Sheshan Geomagnetic Observatory (International
Association of Geomagnetism and Aeronomy (IAGA) code SSH), China was built in Xujiahui, Shanghai in 1874 and moved to Sheshan, Shanghai at the end of 1932. So far, the SSH has a history of nearly 150 years. It is one
of the earliest geomagnetic observatories in China and one of the
geomagnetic observatories with the longest history in the world. In this
paper, we present the rescue and quality control (QC) of the historical data at the
SSH from 1933 to 2019. The rescued data are the absolute hourly mean values
(AHMVs) of declination (D), horizontal (H), and vertical (Z) components. Some of these data are paper-based
records and some are stored in a floppy disk in BAS, DBF, MDB, and other
file storage formats. After digitization and format transformation, we
imported the data into the Toad database to achieve the unified data
management. We performed statistics of completeness, visual analysis,
outliers detects, and data correction on the stored data. We then conducted
the consistency test of daily variation and secular variation (SV) by
comparing the corrected data with the data of the reference observatory, and the computational data of the COV-OBS model, respectively. The consistency test reveals good agreement. However, the individual data should be used with caution because these data are suspicious values, but there is not any explanation or change registered in the available metadata and logbooks. Finally, we present examples of the datasets in discriminating geomagnetic jerks and study of storms. The digitized and quality-controlled AHMVs data are available at: https://doi.org/10.5281/zenodo.7005471 (Zhang et al.,
2022).
更新日期:2022-11-24