Evaluating several satellite precipitation estimates and global ground-based dataset on Sicily (Italy)

Hsu, K-L; Sorooshian, S

Risultato della ricerca: Paper

Abstract

The developing of satellite-based precipitation retrieval systems, presents great potentialities for several ap- plications ranging from weather and meteorological applications to hydrological modelling. Evaluating perfor- mances for these estimates is essential in order to understand their real capabilities and suitability related to each application. In this study an evaluation analysis of satellite precipitation retrieval systems has been carried out for the area of Sicily (Italy). Sicily is an island in the Mediterranean sea with a particular climatology and morphology, which is considered as an interesting test site for satellite precipitation products on the European mid-latitude area. A high density rain-gauges network has been used to evaluate selected satellite precipitation products. Sicily has an area of 26,000 km2 and the gauge density of the network considered in this study is about 250 km2/gauge. Four satellite products (CMORPH, PERSIANN, TMPA-RT, PERSIANN-CCS) along with two adjusted products (TMPA and PERSIANN Adjusted) have been selected for the evaluation. Evalua- tion and comparisons among selected products is performed with reference to the data provided by the gauge network of Sicily and using statistical and visualization tools. Results show that bias is relevant for all satellite products and climatic considerations are reported to address this issue. Moreover bias errors are observed for the adjusted products even though they are reduced respect to only-satellite products. In order to analyze this result, the ground-based precipitation dataset used by adjusted products (GPCC dataset), has been examined and weaknesses arising from spatial sampling of precipitation process have been identi ed for the study area. Therefore possible issues deriving from using global ground-based datasets for local scales are pointed out from this application.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2012

Fingerprint

gauge
hydrological modeling
product
climatology
visualization
weather
sampling
evaluation
rain
analysis
comparison
Mediterranean Sea
test

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Computer Science Applications

Cita questo

@conference{a32ecf2ba599494e9218b759f2ac575b,
title = "Evaluating several satellite precipitation estimates and global ground-based dataset on Sicily (Italy)",
abstract = "The developing of satellite-based precipitation retrieval systems, presents great potentialities for several ap- plications ranging from weather and meteorological applications to hydrological modelling. Evaluating perfor- mances for these estimates is essential in order to understand their real capabilities and suitability related to each application. In this study an evaluation analysis of satellite precipitation retrieval systems has been carried out for the area of Sicily (Italy). Sicily is an island in the Mediterranean sea with a particular climatology and morphology, which is considered as an interesting test site for satellite precipitation products on the European mid-latitude area. A high density rain-gauges network has been used to evaluate selected satellite precipitation products. Sicily has an area of 26,000 km2 and the gauge density of the network considered in this study is about 250 km2/gauge. Four satellite products (CMORPH, PERSIANN, TMPA-RT, PERSIANN-CCS) along with two adjusted products (TMPA and PERSIANN Adjusted) have been selected for the evaluation. Evalua- tion and comparisons among selected products is performed with reference to the data provided by the gauge network of Sicily and using statistical and visualization tools. Results show that bias is relevant for all satellite products and climatic considerations are reported to address this issue. Moreover bias errors are observed for the adjusted products even though they are reduced respect to only-satellite products. In order to analyze this result, the ground-based precipitation dataset used by adjusted products (GPCC dataset), has been examined and weaknesses arising from spatial sampling of precipitation process have been identi ed for the study area. Therefore possible issues deriving from using global ground-based datasets for local scales are pointed out from this application.",
keywords = "Satellite precipitation,; CMORPH; PERSIANN; TMPA; Mediterranean",
author = "{Hsu, K-L; Sorooshian, S} and {Lo Conti}, Francesco and Leonardo Noto",
year = "2012",
language = "English",

}

TY - CONF

T1 - Evaluating several satellite precipitation estimates and global ground-based dataset on Sicily (Italy)

AU - Hsu, K-L; Sorooshian, S

AU - Lo Conti, Francesco

AU - Noto, Leonardo

PY - 2012

Y1 - 2012

N2 - The developing of satellite-based precipitation retrieval systems, presents great potentialities for several ap- plications ranging from weather and meteorological applications to hydrological modelling. Evaluating perfor- mances for these estimates is essential in order to understand their real capabilities and suitability related to each application. In this study an evaluation analysis of satellite precipitation retrieval systems has been carried out for the area of Sicily (Italy). Sicily is an island in the Mediterranean sea with a particular climatology and morphology, which is considered as an interesting test site for satellite precipitation products on the European mid-latitude area. A high density rain-gauges network has been used to evaluate selected satellite precipitation products. Sicily has an area of 26,000 km2 and the gauge density of the network considered in this study is about 250 km2/gauge. Four satellite products (CMORPH, PERSIANN, TMPA-RT, PERSIANN-CCS) along with two adjusted products (TMPA and PERSIANN Adjusted) have been selected for the evaluation. Evalua- tion and comparisons among selected products is performed with reference to the data provided by the gauge network of Sicily and using statistical and visualization tools. Results show that bias is relevant for all satellite products and climatic considerations are reported to address this issue. Moreover bias errors are observed for the adjusted products even though they are reduced respect to only-satellite products. In order to analyze this result, the ground-based precipitation dataset used by adjusted products (GPCC dataset), has been examined and weaknesses arising from spatial sampling of precipitation process have been identi ed for the study area. Therefore possible issues deriving from using global ground-based datasets for local scales are pointed out from this application.

AB - The developing of satellite-based precipitation retrieval systems, presents great potentialities for several ap- plications ranging from weather and meteorological applications to hydrological modelling. Evaluating perfor- mances for these estimates is essential in order to understand their real capabilities and suitability related to each application. In this study an evaluation analysis of satellite precipitation retrieval systems has been carried out for the area of Sicily (Italy). Sicily is an island in the Mediterranean sea with a particular climatology and morphology, which is considered as an interesting test site for satellite precipitation products on the European mid-latitude area. A high density rain-gauges network has been used to evaluate selected satellite precipitation products. Sicily has an area of 26,000 km2 and the gauge density of the network considered in this study is about 250 km2/gauge. Four satellite products (CMORPH, PERSIANN, TMPA-RT, PERSIANN-CCS) along with two adjusted products (TMPA and PERSIANN Adjusted) have been selected for the evaluation. Evalua- tion and comparisons among selected products is performed with reference to the data provided by the gauge network of Sicily and using statistical and visualization tools. Results show that bias is relevant for all satellite products and climatic considerations are reported to address this issue. Moreover bias errors are observed for the adjusted products even though they are reduced respect to only-satellite products. In order to analyze this result, the ground-based precipitation dataset used by adjusted products (GPCC dataset), has been examined and weaknesses arising from spatial sampling of precipitation process have been identi ed for the study area. Therefore possible issues deriving from using global ground-based datasets for local scales are pointed out from this application.

KW - Satellite precipitation,; CMORPH; PERSIANN; TMPA; Mediterranean

UR - http://hdl.handle.net/10447/78714

M3 - Paper

ER -