Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2020.105068 |
Orographic biases in IMERG precipitation estimates in the Ebro River basin (Spain): The effects of rain gauge density and altitude | |
Andrés Navarro, Eduardo García-Ortega, Andrés Merino, José Luis Sánchez, Francisco J. Tapiador | |
2020-05-25 | |
发表期刊 | Atmospheric Research |
出版年 | 2020 |
英文摘要 | A gridded precipitation dataset derived from the high-density rain gauge network of the Ebro River Basin Authority is used to evaluate the performance of Integrated Multi-satellitE Retrievals for GPM (IMERG) level-3 estimates. Although aggregated values compare well, several differences are found between climate regions. The research investigates the role of orography and gauge density on IMERG performance. There are important discrepancies over un-instrumented areas in the Pyrenees (R2 = 0.31) but the correlation dramatically increases (R2 > 0.71) when at least one rain gauge is available for calibration, even in complex, high-altitude terrain (>1500 m). IMERG overestimates precipitation at both lower altitudes (<500 m), especially in summer and autumn because of convective activity, and mid-altitudes (600–1200 m) in the northwestern study area, where weather is dominated by the advection of wet maritime air masses. The main conclusion is that IMERG performance strongly depends on altitude and the precipitation regime. IMERG is nonetheless a suitable alternative to gridded gauge-derived only products for hydrologic operations, especially in areas with a sparse rain gauge network. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/271577 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Andrés Navarro, Eduardo García-Ortega, Andrés Merino, José Luis Sánchez, Francisco J. Tapiador. Orographic biases in IMERG precipitation estimates in the Ebro River basin (Spain): The effects of rain gauge density and altitude[J]. Atmospheric Research,2020. |
APA | Andrés Navarro, Eduardo García-Ortega, Andrés Merino, José Luis Sánchez, Francisco J. Tapiador.(2020).Orographic biases in IMERG precipitation estimates in the Ebro River basin (Spain): The effects of rain gauge density and altitude.Atmospheric Research. |
MLA | Andrés Navarro, Eduardo García-Ortega, Andrés Merino, José Luis Sánchez, Francisco J. Tapiador."Orographic biases in IMERG precipitation estimates in the Ebro River basin (Spain): The effects of rain gauge density and altitude".Atmospheric Research (2020). |
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