Dobson, Brewer, ERA-40 and ERA-Interim original and merged total ozone data sets – evaluation of differences: a case study, Hradec Králové (Czech), 1961–2010

Earth System Science Data

M. Staněk¹  P. Skřivánková¹  L. Metelka¹  K. Vaníček¹ 

[1] Czech Hydrometeorological Institute, Hradec Králové, Praha, Czech Republic

Others  :  983687
DOI  :  doi:10.5194/essd-4-91-2012

【 摘 要 】

Homogenized data series of total ozone measurements taken by the regularlyand well calibrated Dobson and Brewer spectrophotometers at HradecKrálové (Czech) and the data from the re-analyses ERA-40 andERA-Interim were merged and compared to investigate differences between theparticular data sets originated in Central Europe, the Northern Hemisphere (NH) mid-latitudes. TheDobson-to-Brewer transfer function and the algorithm for approximation ofthe data from the re-analyses were developed, tested and applied forcreation of instrumentally consistent and completed total ozone data seriesof the 50-yr period 1961–2010 of observations. This correction has reducedthe well-known seasonal differences between Dobson and Brewer data below the1% calibration limit of the spectrophotometers. Incorporation of theERA-40 and ERA-Interim total ozone data on days with missing measurementssignificantly improved completeness and reliability of the data seriesmainly in the first two decades of the period concerned. Consistentbehaviour of the original and corrected/merged data sets was found in thepre-ozone-hole period (1961–1985). In the post-Pinatubo (1994–2010) era thedata series show seasonal differences that can introduce uncertainty inestimation of ozone recovery mainly in the winter-spring season when theeffect of the Montreal Protocol and its Amendments is expected. All the datasets confirm substantial depletion of ozone also in the summer months thatgives rise to the question about its origin. The merged and completed dataseries of total ozone will be further analyzed to quantify chemical ozonelosses and contribution of natural atmospheric processes to the ozonedepletion over the region. This case study points out the importance ofselection and evaluation of the quality and consistency of the input datasets used in estimation of long-term ozone changes including recovery of theozone layer over the selected areas. Data are available fromthe PANGAEA database at doi:10.1594/PANGAEA.779819.

【 授权许可】

   
© Author(s) 2012. This work is distributedunder the Creative Commons Attribution 3.0 License.