Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2
This paper evaluates a representation of winter stratospheric circulation in the Antarctic that is based on CRA-40, a 40-year global reanalysis dataset released by the China Meteorological Administration, and compares it with representations based on two other state-of-the-art reanalysis datasets: t...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Science Press
2025-03-01
|
| Series: | Earth and Planetary Physics |
| Subjects: | |
| Online Access: | http://www.eppcgs.org/article/doi/10.26464/epp2025010?pageType=en |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849761316269457408 |
|---|---|
| author | ZiXu Wang JingGao Hu Jing-Jia Luo Jian Rao ZongZe Li LiuChi Yan |
| author_facet | ZiXu Wang JingGao Hu Jing-Jia Luo Jian Rao ZongZe Li LiuChi Yan |
| author_sort | ZiXu Wang |
| collection | DOAJ |
| description | This paper evaluates a representation of winter stratospheric circulation in the Antarctic that is based on CRA-40, a 40-year global reanalysis dataset released by the China Meteorological Administration, and compares it with representations based on two other state-of-the-art reanalysis datasets: the fifth-generation atmospheric reanalysis provided by the European Centre for Medium-Range Weather Forecasts (ERA-5) and the Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2). In terms of climatology, we find that CRA-40 portrays a stronger and colder polar vortex in the middle and lower stratosphere than ERA-5, but a weaker and warmer one than MERRA-2. However, disagreement among the three reanalyses is confined mainly to the period before 1999, and is largely reduced after that time. On the interannual timescale, portrayals of the intensity and area of the 10-hPa polar vortex are quite consistent among the three reanalyses, with correlation coefficients greater than 0.9 between each pair of reanalyses. In addition, the central dates of most sudden stratospheric deceleration (SSD) events at 10 hPa in the three reanalyses differ by less than one day, indicating that CRA-40 is also highly consistent with the other two reanalysis datasets regarding daily evolution. Our analyses suggest that CRA-40 performs comparably to ERA-5 and MERRA-2 in characterizing winter circulation in the Antarctic middle and lower stratosphere. |
| format | Article |
| id | doaj-art-37d3a95f0f6a4c5d8ca23c512c55e5d1 |
| institution | DOAJ |
| issn | 2096-3955 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Science Press |
| record_format | Article |
| series | Earth and Planetary Physics |
| spelling | doaj-art-37d3a95f0f6a4c5d8ca23c512c55e5d12025-08-20T03:06:04ZengScience PressEarth and Planetary Physics2096-39552025-03-019245245910.26464/epp2025010LE546-wangzixu-FPerformance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2ZiXu Wang0JingGao Hu1Jing-Jia Luo2Jian Rao3ZongZe Li4LiuChi Yan5Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, ChinaState Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaThis paper evaluates a representation of winter stratospheric circulation in the Antarctic that is based on CRA-40, a 40-year global reanalysis dataset released by the China Meteorological Administration, and compares it with representations based on two other state-of-the-art reanalysis datasets: the fifth-generation atmospheric reanalysis provided by the European Centre for Medium-Range Weather Forecasts (ERA-5) and the Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2). In terms of climatology, we find that CRA-40 portrays a stronger and colder polar vortex in the middle and lower stratosphere than ERA-5, but a weaker and warmer one than MERRA-2. However, disagreement among the three reanalyses is confined mainly to the period before 1999, and is largely reduced after that time. On the interannual timescale, portrayals of the intensity and area of the 10-hPa polar vortex are quite consistent among the three reanalyses, with correlation coefficients greater than 0.9 between each pair of reanalyses. In addition, the central dates of most sudden stratospheric deceleration (SSD) events at 10 hPa in the three reanalyses differ by less than one day, indicating that CRA-40 is also highly consistent with the other two reanalysis datasets regarding daily evolution. Our analyses suggest that CRA-40 performs comparably to ERA-5 and MERRA-2 in characterizing winter circulation in the Antarctic middle and lower stratosphere.http://www.eppcgs.org/article/doi/10.26464/epp2025010?pageType=encra-40era-5merra-2antarctic stratospherereanalysis intercomparison |
| spellingShingle | ZiXu Wang JingGao Hu Jing-Jia Luo Jian Rao ZongZe Li LiuChi Yan Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 Earth and Planetary Physics cra-40 era-5 merra-2 antarctic stratosphere reanalysis intercomparison |
| title | Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 |
| title_full | Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 |
| title_fullStr | Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 |
| title_full_unstemmed | Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 |
| title_short | Performance of CRA-40 reanalysis in representing the Antarctic winter stratospheric circulation: a comparison with ERA-5 and MERRA-2 |
| title_sort | performance of cra 40 reanalysis in representing the antarctic winter stratospheric circulation a comparison with era 5 and merra 2 |
| topic | cra-40 era-5 merra-2 antarctic stratosphere reanalysis intercomparison |
| url | http://www.eppcgs.org/article/doi/10.26464/epp2025010?pageType=en |
| work_keys_str_mv | AT zixuwang performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 AT jinggaohu performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 AT jingjialuo performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 AT jianrao performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 AT zongzeli performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 AT liuchiyan performanceofcra40reanalysisinrepresentingtheantarcticwinterstratosphericcirculationacomparisonwithera5andmerra2 |