Validation of ERA5-Land and NCEP/NCAR Reanalysis-Based Precipitation Data over the Sichuan-Yunnan Region Using Satellite Observations

Zongze Li

doi:10.54254/2753-8818/2025.21616

Research Article

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Published on 27 March 2025

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Li,Z. (2025). Validation of ERA5-Land and NCEP/NCAR Reanalysis-Based Precipitation Data over the Sichuan-Yunnan Region Using Satellite Observations. Theoretical and Natural Science,100,51-59.

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Validation of ERA5-Land and NCEP/NCAR Reanalysis-Based Precipitation Data over the Sichuan-Yunnan Region Using Satellite Observations

Zongze Li *^,1,

¹ School of Atmospheric Sciences, Nanjing University of Information Science & Technology, No. 219 Ningliu Road, Pukou District, Nanjing, Jiangsu, China

* Author to whom correspondence should be addressed.

https://doi.org/10.54254/2753-8818/2025.21616

Abstract

This study evaluates the applicability of ERA5-Land and NCEP/NCAR reanalysis precipitation data in the Sichuan-Yunnan region by comparing them with GPM-IMERG satellite observations from 1998 to 2023. The analysis focuses on seasonal variations in precipitation across Sichuan-Yunnan Region and its surrounding areas. Results indicate that both datasets effectively capture the seasonal precipitation patterns observed in IMERG, with precipitation peaking in summer, followed by autumn and spring, and reaching its lowest levels in winter. On average, summer precipitation is approximately seven times higher than in winter. Over the full study period (1998–2023), both datasets tend to overestimate precipitation compared to satellite observations. However, from 2010 to 2023, ERA5-Land exhibited smaller biases than NCEP/NCAR, whereas from 1998 to 2010, their biases were relatively similar. In terms of spatial distribution, ERA5-Land generally overestimates precipitation, particularly in the western Hengduan Mountains and in parts of Sichuan and Yunnan, where summer and autumn precipitation exceed 1000 mm. Meanwhile, NCEP/NCAR consistently identifies a high-precipitation center (peaking at around 500 mm) in Sichuan Province, with significant precipitation extending eastward into Sichuan and western Yunnan. During winter and spring, this high-precipitation center shifts further east, reaching southern Yunnan. Notably, in summer and autumn, NCEP/NCAR underestimates precipitation by approximately 650 mm in areas west of Sichuan and east of Yunnan.

Keywords

GPM-IMERG, NCEP/NCAR Reanalysis, ERA5-Land Reanalysis, Precipitation

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References

[1]. Skofronick-Jackson, G., Kirschbaum, D., Petersen, W., et al. The global precipitation measurement (GPM) mission's scientific achievements and societal contributions: Reviewing four years of advanced rain and snow observations. Quarterly Journal of the Royal Meteorological Society, 2018, 144(S1): 27-48.

[2]. Liu, Tingting, Zhu, Xiufang, Guo, Rui, et al. Analysis of the applicability of ERA5 reanalysis precipitation data in China. Arid Zone Geography, 2022, 45(1): 66-79.

[3]. Zhang, Ruoyu. The applicability of PREC/L reanalysis precipitation data in the Shiyang River Basin and its application study. [D] Wuhan: Huazhong University of Science and Technology, 2019: 1-8.

[4]. Lan, Yufeng, Hou, Junxing, Huang, Jiahong. Evaluation of three reanalysis precipitation datasets in southern China. Meteorological Research and Applications, 2020, 41(02): 14-20. DOI: 10.19849/j.cnki.CN45-1356/P.2020.2.03.

[5]. Cheng, Xiaoyu, Wang, Yanhua, Li, Guochun, et al. Comparative evaluation of three reanalysis precipitation datasets in China. Progress in Climate Change Research, 2013, 9(4): 258-265.

[6]. Ye, M. S., Yao, X. P., Zhang, T., et al. Intercomparison of CRA-Interim precipitation products with ERA5 and JRA-55. Journal of Tropical Meteorology, 2021, 27(2): 136-147.

[7]. Pendergrass, A. G., et al. "Nonlinear response of extreme precipitation to warming in CESM1." Geophysical Research Letters, 46.17-18 (2019): 10551-10560.

[8]. Jamet, Cédric, and William W. Hsieh. "Nonlinear atmospheric variability in the winter northeast Pacific associated with the Madden-Julian oscillation." Geophysical Research Letters, 32.13 (2005).

[9]. Qin, Yanhua, et al. "Spatio-temporal variations of nonlinear trends of precipitation over an arid region of northwest China according to the extreme-point symmetric mode decomposition method." International Journal of Climatology, 38.5 (2018): 2239-2249.

[10]. Bengtsson, Lisa, et al. "Impact of flow-dependent horizontal diffusion on resolved convection in AROME." Journal of Applied Meteorology and Climatology, 51.1 (2012): 54-67.

[11]. Guo, Chunrui, et al. "Does ERA5-Land Effectively Capture Extreme Precipitation in the Yellow River Basin?" Atmosphere, 15.10 (2024): 1254.

[12]. Li, Yanzhao, et al. "Evaluation of long-term and high-resolution gridded precipitation and temperature products in the Qilian Mountains, Qinghai-Tibet Plateau." Frontiers in Environmental Science, 10 (2022): 906821.

[13]. Fu, Guobin, et al. "Comparison of NCEP-NCAR and ERA-Interim over Australia." International Journal of Climatology, 36.5 (2016).

[14]. Huang, Xiaolong, Wu, Wei, Xu, Jianhui, et al. Evaluation of ERA5-Land precipitation reanalysis data in southwestern China. Plateau Meteorology, 2023, 42(06): 1562-1575.

[15]. Gao, Jinlan, Wen, Huayang, Zheng, Xiaoyi, et al. Evaluation of three reanalysis precipitation datasets in Anhui Province. Journal of Meteorology and Environment, 2023, 39(4): 47-56.

Cite this article

Li,Z. (2025). Validation of ERA5-Land and NCEP/NCAR Reanalysis-Based Precipitation Data over the Sichuan-Yunnan Region Using Satellite Observations. Theoretical and Natural Science,100,51-59.

Data availability

The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.

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About volume

Volume title: Proceedings of the 3rd International Conference on Mathematical Physics and Computational Simulation

Conference website: https://www.confmpcs.org/

ISBN：978-1-80590-015-3(Print) / 978-1-80590-016-0(Online)

Conference date: 27 June 2025

Editor：Anil Fernando

Series: Theoretical and Natural Science

Volume number: Vol.100

ISSN：2753-8818(Print) / 2753-8826(Online)

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