The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China
Abstract The Integrated Multi‐satellitE Retrievals for Global Precipitation Measurement mission (IMERG) aims to deliver the “best” precipitation estimation from space and has attracted much attention. The Version 05 of IMERG products including the near‐real‐time “Early” and “Late” run products (IMER...
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| Format: | Article |
| Language: | English |
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American Geophysical Union (AGU)
2019-12-01
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| Series: | Earth and Space Science |
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| Online Access: | https://doi.org/10.1029/2019EA000977 |
| _version_ | 1818287924170457088 |
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| author | Jianbin Su Haishen Lü Dongryeol Ryu Yonghua Zhu |
| author_facet | Jianbin Su Haishen Lü Dongryeol Ryu Yonghua Zhu |
| author_sort | Jianbin Su |
| collection | DOAJ |
| description | Abstract The Integrated Multi‐satellitE Retrievals for Global Precipitation Measurement mission (IMERG) aims to deliver the “best” precipitation estimation from space and has attracted much attention. The Version 05 of IMERG products including the near‐real‐time “Early” and “Late” run products (IMERG‐E and IMERG‐L, respectively), and the post‐real‐time “Final” run IMERG product (IMERG‐F) are assessed at both national and basin scales against gauge observations over Mainland China for a 4‐year period (from April 2014 to March 2018). As control products for comparison, their predecessor Tropical Rainfall Measurement Mission (TRMM) Multi‐satellite Precipitation Analysis (TMPA) products (i.e., TMPA‐RT and TMPA‐V7) are also employed. Components analysis confirms the best performance of IMERG‐F among the five SPEs in three different categories. All five SPEs feature increasing bias and root mean square difference (RMSD) with increasing daily gauge total precipitation, and such issue is less pronounced for IMERG‐F—as evidenced by the lowest bias and RMSD across all precipitation rates. Besides, compared to TMPA, IMERG products exhibit better accuracy in detecting real precipitation evens, especially for light‐to‐medium rain (<60 mm/day), but they do not demonstrate significant improvement in the assessment of severe over/underestimation. In the basin‐scale comparison, all five SPEs catch the key variation feature of basin‐averaged precipitation time series (except TMPA‐RT over Continental River Basin). Overall, IMERG‐F demonstrates the best performance over all nine basins despite the slight overestimation, followed by TMPA‐V7. IMERG‐E and IMERG‐L show performance close to or even better than TMPA‐V7 in terms of the correlation coefficient and RMSD. |
| first_indexed | 2024-12-13T01:48:13Z |
| format | Article |
| id | doaj.art-eff55b5babfc45e4bfb72c98568bc3d1 |
| institution | Directory Open Access Journal |
| issn | 2333-5084 |
| language | English |
| last_indexed | 2024-12-13T01:48:13Z |
| publishDate | 2019-12-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Earth and Space Science |
| spelling | doaj.art-eff55b5babfc45e4bfb72c98568bc3d12022-12-22T00:03:35ZengAmerican Geophysical Union (AGU)Earth and Space Science2333-50842019-12-016122461247910.1029/2019EA000977The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland ChinaJianbin Su0Haishen Lü1Dongryeol Ryu2Yonghua Zhu3State Key Laboratory of Hydrology‐Water Resources and Hydraulic Engineering, National Cooperative Innovation Center for Water Safety and Hydroscience, College of Hydrology and Water Resources Hohai University Nanjing ChinaState Key Laboratory of Hydrology‐Water Resources and Hydraulic Engineering, National Cooperative Innovation Center for Water Safety and Hydroscience, College of Hydrology and Water Resources Hohai University Nanjing ChinaDepartment of Infrastructure Engineering University of Melbourne Melbourne Victoria AustraliaState Key Laboratory of Hydrology‐Water Resources and Hydraulic Engineering, National Cooperative Innovation Center for Water Safety and Hydroscience, College of Hydrology and Water Resources Hohai University Nanjing ChinaAbstract The Integrated Multi‐satellitE Retrievals for Global Precipitation Measurement mission (IMERG) aims to deliver the “best” precipitation estimation from space and has attracted much attention. The Version 05 of IMERG products including the near‐real‐time “Early” and “Late” run products (IMERG‐E and IMERG‐L, respectively), and the post‐real‐time “Final” run IMERG product (IMERG‐F) are assessed at both national and basin scales against gauge observations over Mainland China for a 4‐year period (from April 2014 to March 2018). As control products for comparison, their predecessor Tropical Rainfall Measurement Mission (TRMM) Multi‐satellite Precipitation Analysis (TMPA) products (i.e., TMPA‐RT and TMPA‐V7) are also employed. Components analysis confirms the best performance of IMERG‐F among the five SPEs in three different categories. All five SPEs feature increasing bias and root mean square difference (RMSD) with increasing daily gauge total precipitation, and such issue is less pronounced for IMERG‐F—as evidenced by the lowest bias and RMSD across all precipitation rates. Besides, compared to TMPA, IMERG products exhibit better accuracy in detecting real precipitation evens, especially for light‐to‐medium rain (<60 mm/day), but they do not demonstrate significant improvement in the assessment of severe over/underestimation. In the basin‐scale comparison, all five SPEs catch the key variation feature of basin‐averaged precipitation time series (except TMPA‐RT over Continental River Basin). Overall, IMERG‐F demonstrates the best performance over all nine basins despite the slight overestimation, followed by TMPA‐V7. IMERG‐E and IMERG‐L show performance close to or even better than TMPA‐V7 in terms of the correlation coefficient and RMSD.https://doi.org/10.1029/2019EA000977TMAPIMERGMainland China |
| spellingShingle | Jianbin Su Haishen Lü Dongryeol Ryu Yonghua Zhu The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China Earth and Space Science TMAP IMERG Mainland China |
| title | The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China |
| title_full | The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China |
| title_fullStr | The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China |
| title_full_unstemmed | The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China |
| title_short | The Assessment and Comparison of TMPA and IMERG Products Over the Major Basins of Mainland China |
| title_sort | assessment and comparison of tmpa and imerg products over the major basins of mainland china |
| topic | TMAP IMERG Mainland China |
| url | https://doi.org/10.1029/2019EA000977 |
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