The KLIWAS North Sea Climatology. Part II: Assessment against Global Reanalyses
| العنوان: | The KLIWAS North Sea Climatology. Part II: Assessment against Global Reanalyses |
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| المؤلفون: | Annika Jahnke-Bornemann, Detlef Stammer, Nils H. Schade, Lydia Gates, Iris Hinrichs, Birger Tinz, Remon Sadikni |
| المصدر: | Journal of Atmospheric and Oceanic Technology. 35:127-145 |
| بيانات النشر: | American Meteorological Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Atmospheric Science, 010504 meteorology & atmospheric sciences, Atmospheric pressure, Ocean Engineering, 010502 geochemistry & geophysics, Atmospheric sciences, 01 natural sciences, Atmosphere, Air temperature, Climatology, Environmental science, Climate model, North sea, 0105 earth and related environmental sciences |
| الوصف: | Observational reference datasets are needed in atmosphere and ocean for quality assessments of climate models and for the evaluation of atmospheric reanalyses. To meet this demand on the regional scale, the Climate Water Navigation (KLIWAS) North Sea climatology (KNSC) was developed. This paper uses KNSC to assess the quality of five atmospheric reanalysis products [ERA-40; ERA-Interim; NCEP-1; 20CR, version 2 (20CRv2); and MERRA] over the North Sea from 1979 to 2001. Differences in sea level pressure (2-m air temperature) can be found in coastal regions for ERA-40/ERA-Interim and MERRA, and are more pronounced during positive (negative) phases of the NAO. 20CRv2 shows biases over the entire North Sea and all seasons of several hectopascals. ERA-40 and ERA-Interim show a negative 2-m air temperature bias relative to KNSC along the coastal mainland of Europe, especially during winter months, possibly a result of a remaining land influence. Mean differences result from winter and fall, mostly remaining within measurement uncertainties. Despite the upgrades in the model setup, ERA-Interim shows negligible differences from ERA-40. 20CRv2 and MERRA show positive (negative) biases during the summer (winter) half year. NCEP-1 follows ERA-40/ERA-Interim but mostly with slightly higher differences. All five reanalyses reproduce the decadal variability and climate shift signals present in KNSC fields. Overall, only 20CRv2 has to be considered as clearly unsatisfactorily regarding biases, MAE, and RMSE compared to all other datasets investigated. This study suggests that similar intercomparison studies, performed over other parts of the world’s oceans, especially coastal regions, can be very helpful in identifying shortcomings in atmospheric reanalysis products. |
| تدمد: | 1520-0426 0739-0572 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9f1ad7dd60789fa1ef57b72399352213 https://doi.org/10.1175/jtech-d-17-0045.1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........9f1ad7dd60789fa1ef57b72399352213 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15200426 07390572 |
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