干旱区生态环境知识资源中心(Arid): Validity, reliability and certainty of PERSIANN and TRMM satellite-derived daily precipitation data in arid and semiarid climates

Arid

DOI	10.1007/s11600-022-00801-y
	Validity, reliability and certainty of PERSIANN and TRMM satellite-derived daily precipitation data in arid and semiarid climates
	Khojand, Keyvan; Shaghaghian, Mahmood Reza; Ghadampour, Zahra; Sabzevari, Touraj
通讯作者	Shaghaghian, MR
来源期刊	ACTA GEOPHYSICA
ISSN	1895-6572
EISSN	1895-7455
出版年	2022
卷号	70 期号:4 页码:1745-1767
英文摘要	Having doubts about the adequacy of reliability level of satellite-derived precipitation products, along with their application in large number of hydrological models, has led to many studies on evaluating the efficiency of such data. In this study, two new procedures were proposed to compute reliability and certainty degrees of PERSIANN and TRMM 3B42RT data sets, and six traditional indicators were used to evaluate their validation. In addition, the cumulative density function (cdf) of the above-mentioned data sets was compared with the ground-based observations in 23 synoptic stations in Fars, Iran. The Kolmogorov-Smirnov test was performed using the data sets at 5% significance level which led to the result of null hypothesis that was not being rejected, suggesting that the satellite-derived daily precipitation data (SDDPD) and ground-based observations are drawn from the same distribution. Results indicated that TRMM and PERSIANN follow quite similar probability pattern of ground-based observations in arid and semiarid climate, respectively. However, data probability pattern of TRMM cannot be considered similar to ground-based observations in arid region, neither can PERSIANN in semiarid climate. Among common cross-validating attributes, the values of ME and BIAS, in addition to RMSE and MAE, led to the conclusion that in PERSIANN, the rainfall daily rates are almost underestimated while TRMM overestimates the values mainly in semiarid regions. Moreover, the PERSIANN was found to be significantly correlated with IDM (De Martonne aridity Index), and the values of underestimation increased with growth of the index. The reliability values of SDDPD over the study area, for both TRMM and PERSIANN, show the reverse trend with increasing IDM in almost all acceptable error intervals. Along with effects of climate conditions, the reliability degrees of PERSIANN seem quite more consistent at different acceptable error intervals in comparison with the corresponding values of TRMM. In addition to validity and reliability, the error entropy of SDDPD, as an index for uncertainty degree, increases as the IDM rises, which is theoretically corresponds with reliability concept. However, in comparison with PERSIANN, TRMM data set, overall, has higher degree of uncertainty. In addition, to evaluate effect of daily rainfall intensity on the uncertainty degree of SDDPD, the uncertainty degree slightly increases as daily rainfall intensifies to about 15 mm/day. But for higher daily rainfall intensities, on the other hand, the uncertainty degree seems to gradually decline as the daily rainfall increases.
英文关键词	PERSIANN Arid and semiarid climates Validity Reliability Certainty
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000805520800001
WOS关键词	ANALYSIS TMPA PRODUCTS ; DENSITY GAUGE DATASET ; PERFORMANCE EVALUATION ; RAINFALL ESTIMATION ; WEST-AFRICA ; MULTISATELLITE ; VALIDATION ; REGION ; 3B42 ; V7
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391529
推荐引用方式 GB/T 7714	Khojand, Keyvan,Shaghaghian, Mahmood Reza,Ghadampour, Zahra,et al. Validity, reliability and certainty of PERSIANN and TRMM satellite-derived daily precipitation data in arid and semiarid climates[J],2022,70(4):1745-1767.
APA	Khojand, Keyvan,Shaghaghian, Mahmood Reza,Ghadampour, Zahra,&Sabzevari, Touraj.(2022).Validity, reliability and certainty of PERSIANN and TRMM satellite-derived daily precipitation data in arid and semiarid climates.ACTA GEOPHYSICA,70(4),1745-1767.
MLA	Khojand, Keyvan,et al."Validity, reliability and certainty of PERSIANN and TRMM satellite-derived daily precipitation data in arid and semiarid climates".ACTA GEOPHYSICA 70.4(2022):1745-1767.