气候变化领域集成服务门户(CCPortal): Consistency of satellite-based precipitation products in space and over time compared with gauge observations and snow- hydrological modelling in the Lake Titicaca region

CCPortal

DOI	10.5194/hess-23-595-2019
	Consistency of satellite-based precipitation products in space and over time compared with gauge observations and snow- hydrological modelling in the Lake Titicaca region
	Satgé F.; Ruelland D.; Bonnet M.-P.; Molina J.; Pillco R.
发表日期	2019
ISSN	1027-5606
起始页码	595
结束页码	619
卷号	23 期号:1
英文摘要	This paper proposes a protocol to assess the space- time consistency of 12 satellite-based precipitation products (SPPs) according to various indicators, including (i) direct comparison of SPPs with 72 precipitation gauges; (ii) sensitivity of streamflow modelling to SPPs at the outlet of four basins; and (iii) the sensitivity of distributed snow models to SPPs using a MODIS snow product as reference in an unmonitored mountainous area. The protocol was applied successively to four different time windows (2000-2004, 2004- 2008, 2008-2012 and 2000-2012) to account for the space- time variability of the SPPs and to a large dataset composed of 12 SPPs (CMORPH-RAW v.1, CMORPH-CRT v.1, CMORPH-BLD v.1, CHIRP v.2, CHIRPS v.2, GSMaP v.6, MSWEP v.2.1, PERSIANN, PERSIANN-CDR, TMPA- RT v.7, TMPA-Adj v.7 and SM2Rain-CCI v.2), an unprecedented comparison. The aim of using different space scales and timescales and indicators was to evaluate whether the efficiency of SPPs varies with the method of assessment, time window and location. Results revealed very high discrepancies between SPPs. Compared to precipitation gauge observations, some SPPs (CMORPH-RAW v.1, CMORPH- CRT v.1, GSMaP v.6, PERSIANN, and TMPA-RT v.7) are unable to estimate regional precipitation, whereas the others (CHIRP v.2, CHIRPS v.2, CMORPH-BLD v.1, MSWEP v.2.1, PERSIANN-CDR, and TMPA-Adj v.7) produce a realistic representation despite recurrent spatial limitation over regions with contrasted emissivity, temperature and orography. In 9 out of 10 of the cases studied, streamflow was more realistically simulated when SPPs were used as forcing precipitation data rather than precipitation derived from the available precipitation gauge networks, whereas the SPP's ability to reproduce the duration of MODIS-based snow cover resulted in poorer simulations than simulation using available precipitation gauges. Interestingly, the potential of the SPPs varied significantly when they were used to reproduce gauge precipitation estimates, streamflow observations or snow cover duration and depending on the time window considered. SPPs thus produce space-time errors that cannot be assessed when a single indicator and/or time window is used, underlining the importance of carefully considering their space-time consistency before using them for hydroclimatic studies. Among all the SPPs assessed, MSWEP v.2.1 showed the highest space-time accuracy and consistency in reproducing gauge precipitation estimates, streamflow and snow cover duration. © 2019 Author(s).
语种	英语
scopus关键词	Chirp modulation; Clock and data recovery circuits (CDR circuits); Gages; Large dataset; Meteorological instruments; Radiometers; Snow; Stream flow; Different time windows; Hydrological modelling; MODIS snow products; Precipitation gauges; Precipitation products; Snow cover durations; Space-time accuracy; Space-time variability; Surface plasmon resonance; gauge; hydrological modeling; MODIS; mountain region; precipitation (climatology); satellite data; snow cover; spatiotemporal analysis; streamflow; Lake Titicaca
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159774
作者单位	Satgé, F., CNES, UMR Hydrosciences, University of Montpellier, Place E. Bataillon, Montpellier Cedex 5, 34395, France, IRD, UMR 228 Espace-Dev, Maison de la Télédétection, 500 rue JF Breton, Montpellier Cedex 5, 34093, France; Ruelland, D., CNRS, UMR Hydrosciences, University of Montpellier, Place E. Bataillon, Montpellier Cedex 5, 34395, France; Bonnet, M.-P., IRD, UMR 228 Espace-Dev, Maison de la Télédétection, 500 rue JF Breton, Montpellier Cedex 5, 34093, France; Molina, J., Universidad Mayor de San Andres, Instituto de Hidraulica e Hidrologia, Calle 30 Cota Cota, La-Paz, Bolivia; Pillco, R., Universidad Mayor de San Andres, Instituto de Hidraulica e Hidrologia, Calle 30 Cota Cota, La-Paz, Bolivia
推荐引用方式 GB/T 7714	Satgé F.,Ruelland D.,Bonnet M.-P.,et al. Consistency of satellite-based precipitation products in space and over time compared with gauge observations and snow- hydrological modelling in the Lake Titicaca region[J],2019,23(1).
APA	Satgé F.,Ruelland D.,Bonnet M.-P.,Molina J.,&Pillco R..(2019).Consistency of satellite-based precipitation products in space and over time compared with gauge observations and snow- hydrological modelling in the Lake Titicaca region.Hydrology and Earth System Sciences,23(1).
MLA	Satgé F.,et al."Consistency of satellite-based precipitation products in space and over time compared with gauge observations and snow- hydrological modelling in the Lake Titicaca region".Hydrology and Earth System Sciences 23.1(2019).