Evaluation of water vapor from CARRA reanalysis based on GNSS and radiosonde observation in the Arctic

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-01-11 DOI:10.1016/j.jastp.2025.106431

Ce Zhang , Shuaimin Wang , Yuling Zhao , Yujing Xu , Jiajia Zhang , Yanhan Mo , Hong Yu

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引用次数: 0

Abstract

The Arctic has a significant impact on global climate change because of its special geographical location. Meanwhile, water vapor is one of the most important atmospheric components influencing climate change. In this study, the accuracy of precipitable water vapor (PWV) from Copernicus Arctic Regional Reanalysis (CARRA) is evaluated with 45 Global Navigation Satellite System (GNSS), 13 radiosonde stations and ERA5 reanalysis during 2020–2022 in the Arctic. The mean bias values of CARRA PWV using GNSS PWV, radiosonde PWV and ERA5 PWV are 0.30 mm, −0.00 mm and 0.21 mm, respectively. The results show that the CARRA PWV is mostly overestimated compared with GNSS and ERA5 PWV and not much different for the radiosonde PWV. The RMSE values of CARRA PWV using GNSS PWV, radiosonde PWV and ERA5 PWV are 0.71 mm, 0.40 mm and 0.67 mm, respectively. The results indicate that CARRA PWV has good agreement with GNSS PWV, radiosonde PWV and ERA5 PWV, but CARRA PWV is better agreement with radiosonde PWV. Afterwards, the seasonal bias and RMSE values of CARRA PWV using GNSS PWV, radiosonde PWV and ERA5 PWV are analyzed. The RMSE in the warm season is obviously higher than that in the cold season. Finally, the monthly RMSE values of CARRA PWV are analyzed. The results show that the RMSE values of CARRA PWV with respect to GNSS PWV, radiosonde PWV and ERA5 PWV are large in the warm season and small in the cold season, thereby indicating that the accuracy of CARRA PWV has obvious seasonality. The RMSE values of CARRA PWV and radiosonde PWV are smaller than the RMSE values of CARRA and GNSS PWV and CARRA PWV and ERA5 PWV in every month. The results illustrate that CARRA PWV has better consistency with radiosonde PWV compared with GNSS and ERA5 PWV even in every month.

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.