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Open AccessArticle

Intercomparison of Gridded Precipitation Datasets over a Sub-Region of the Central Himalaya and the Southwestern Tibetan Plateau

1
Geography Department, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
2
Department of Physical Geography, Stockholm University, Svante Arrhenius väg 8, 11418 Stockholm, Sweden
3
Laboratory for Climatology and Remote Sensing, Department of Geography, Philipps-Universität Marburg, Deutschhausstrasse 12, 35032 Marburg, Germany
4
Chair of Climatology, Technische Universität Berlin, Rothenburgstrasse 12, 12165 Berlin, Germany
5
Department of Civil Engineering, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany
*
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3271; https://doi.org/10.3390/w12113271
Received: 23 October 2020 / Revised: 13 November 2020 / Accepted: 16 November 2020 / Published: 21 November 2020
Precipitation is a central quantity of hydrometeorological research and applications. Especially in complex terrain, such as in High Mountain Asia (HMA), surface precipitation observations are scarce. Gridded precipitation products are one way to overcome the limitations of ground truth observations. They can provide datasets continuous in both space and time. However, there are many products available, which use various methods for data generation and lead to different precipitation values. In our study we compare nine different gridded precipitation products from different origins (ERA5, ERA5-Land, ERA-interim, HAR v2 10 km, HAR v2 2 km, JRA-55, MERRA-2, GPCC and PRETIP) over a subregion of the Central Himalaya and the Southwest Tibetan Plateau, from May to September 2017. Total spatially averaged precipitation over the study period ranged from 411 mm (GPCC) to 781 mm (ERA-Interim) with a mean value of 623 mm and a standard deviation of 132 mm. We found that the gridded products and the few observations, with few exceptions, are consistent among each other regarding precipitation variability and rough amount within the study area. It became obvious that higher grid resolution can resolve extreme precipitation much better, leading to overall lower mean precipitation spatially, but higher extreme precipitation events. We also found that generally high terrain complexity leads to larger differences in the amount of precipitation between products. Due to the considerable differences between products in space and time, we suggest carefully selecting the product used as input for any research application based on the type of application and specific research question. While coarse products such as ERA-Interim or ERA5 that cover long periods but have coarse grid resolution have previously shown to be able to capture long-term trends and help with identifying climate change features, this study suggests that more regional applications, such as glacier mass-balance modeling, require higher spatial resolution, as is reproduced, for example, in HAR v2 10 km. View Full-Text
Keywords: precipitation; reanalysis data; satellite retrieval; complex terrain; spatial resolution; temporal resolution; High Mountain Asia; Tibetan Plateau; third pole precipitation; reanalysis data; satellite retrieval; complex terrain; spatial resolution; temporal resolution; High Mountain Asia; Tibetan Plateau; third pole
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MDPI and ACS Style

Hamm, A.; Arndt, A.; Kolbe, C.; Wang, X.; Thies, B.; Boyko, O.; Reggiani, P.; Scherer, D.; Bendix, J.; Schneider, C. Intercomparison of Gridded Precipitation Datasets over a Sub-Region of the Central Himalaya and the Southwestern Tibetan Plateau. Water 2020, 12, 3271. https://doi.org/10.3390/w12113271

AMA Style

Hamm A, Arndt A, Kolbe C, Wang X, Thies B, Boyko O, Reggiani P, Scherer D, Bendix J, Schneider C. Intercomparison of Gridded Precipitation Datasets over a Sub-Region of the Central Himalaya and the Southwestern Tibetan Plateau. Water. 2020; 12(11):3271. https://doi.org/10.3390/w12113271

Chicago/Turabian Style

Hamm, Alexandra; Arndt, Anselm; Kolbe, Christine; Wang, Xun; Thies, Boris; Boyko, Oleksiy; Reggiani, Paolo; Scherer, Dieter; Bendix, Jörg; Schneider, Christoph. 2020. "Intercomparison of Gridded Precipitation Datasets over a Sub-Region of the Central Himalaya and the Southwestern Tibetan Plateau" Water 12, no. 11: 3271. https://doi.org/10.3390/w12113271

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