DOI: 10.5194/hess-21-6559-2017
Scopus记录号: 2-s2.0-85039971646
论文题名: Evaluation of GPM IMERG Early, Late, and Final rainfall estimates using WegenerNet gauge data in southeastern Austria
作者: Sungmin O ; , Foelsche U ; , Kirchengast G ; , Fuchsberger J ; , Tan J ; , Petersen W ; A
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 12 起始页码: 6559
结束页码: 6572
语种: 英语
Scopus关键词: Gages
; Precipitation (meteorology)
; Rain gages
; Climate stations
; Global precipitation measurements
; Graphical methods
; Near real-time datum
; Passive microwaves
; Rainfall estimates
; Rainfall intensity
; Satellite retrieval
; Rain
; data set
; precipitation (climatology)
; precipitation intensity
; rainfall
; raingauge
; satellite constellation
; Austria
英文摘要: The Global Precipitation Measurement (GPM) Integrated Multi-satellite Retrievals for GPM (IMERG) products provide quasi-global (60° N-60° S) precipitation estimates, beginning March 2014, from the combined use of passive microwave (PMW) and infrared (IR) satellites comprising the GPM constellation. The IMERG products are available in the form of near-real-time data, i.e., IMERG Early and Late, and in the form of post-real-time research data, i.e., IMERG Final, after monthly rain gauge analysis is received and taken into account. In this study, IMERG version 3 Early, Late, and Final (IMERG-E,IMERG-L, and IMERG-F) half-hourly rainfall estimates are compared with gauge-based gridded rainfall data from theWegenerNet Feldbach region (WEGN) high-density climate station network in southeastern Austria. The comparison is conducted over two IMERG 0.1° ×0.1° grid cells, entirely covered by 40 and 39 WEGN stations each, using data from the extended summer season (April-October) for the first two years of the GPM mission. The entire data are divided into two rainfall intensity ranges (low and high) and two seasons (warm and hot), and we evaluate the performance of IMERG, using both statistical and graphical methods. Results show that IMERGF rainfall estimates are in the best overall agreement with the WEGN data, followed by IMERG-L and IMERG-E estimates, particularly for the hot season. We also illustrate, through rainfall event cases, how insufficient PMW sources and errors in motion vectors can lead to wide discrepancies in the IMERG estimates. Finally, by applying the method of Villarini and Krajewski (2007), we find that IMERG-F halfhourly rainfall estimates can be regarded as a 25 min gauge accumulation, with an offset of C40 min relative to its nominal time. © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78955
Appears in Collections: 气候变化事实与影响
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作者单位: Institute for Geophysics, Astrophysics, and Meteorology, Institute of Physics (IGAM/IP), NAWI Graz, University of Graz, Graz, Austria; FWF-DK Climate Change, University of Graz, Graz, Austria; Wegener Center for Climate and Global Change (WEGC), University of Graz, Graz, Austria; Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth Sciences Office, ST-11, NASA Marshall Space Flight Center, Huntsville, AL, United States
Recommended Citation:
Sungmin O,, Foelsche U,, Kirchengast G,et al. Evaluation of GPM IMERG Early, Late, and Final rainfall estimates using WegenerNet gauge data in southeastern Austria[J]. Hydrology and Earth System Sciences,2017-01-01,21(12)