WIGOS WORKSHOP 2019 Session 2.2 GSMaP - Integrated application with developer and user collaboration - Takuji Kubota and Moeka Yamaji Earth Observation Research Center (EORC) Japan Aerospace Exploration Agency (JAXA)
Q2.2-1 Does your organization use GSMaP (https://sharaku.eorc.jaxa.jp/GSMaP_NOW/index.htm)? 1. Yes 2. No, but want to use 3. Not interested Presenter’s comments GSMaP can be a helpful tool to know precipitation over areas where the ground observation network is not sufficient. We’re happy to know utilizations of 6 agencies, and positive responses from 10 agencies. This presentation can help you to know what the GSMaP is and the effective way to use the GSMaP data. 2 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Q2.2-2 Do you have resources to use satellite observation data? 1. Enough 2. Yes, but not enough 3. No Presenter’s comments Wider utilizations of the satellite data with smaller resources will be desirable. Communications in the workshop may help you. An introductory book of the GSMaP utilization (https://www.eorc.jaxa.jp/GPM/doc/data_utilization/2016_jireishu_e.pdf) also may help you. 3 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Satellite Merits of Satellite Global observation with the same time interval 4 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Heavy rainfall causing serious damage over western Japan in July 2018 Accumulated hourly White: Cloud Color: Rainfall (Blue/weak to Red/Heavy) 5 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Global Satellite Mapping of Precipitation D ual-Frequency P recipitation R adar Gauge-adjusted Quoted by JMA website Providing reference standard G PM M icrowave Geostationary satellite I mager G lobal JMA Himawari, P recipitation and other M easurement GEO satellites Constellation satellites Core satellite Precipitation Microwave IR Imager Radar Radiometer Multi-satellite Rainfall Product: GSMaP • hourly global rainfall data • 0.1x0.1deg. lat/lon distribution • in near real time 6 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
GSMaP Product • hourly global rainfall data • 0.1x0.1deg. lat/lon distribution • in near real time GSMaP registered users 国内 海外 毎月合計 累計 The number of GSMaP registration users Registration number 140 5000 4500 4000 120 (data analysis users) 4000 3000 100 月 登 3500 毎 録 登 者 録 累 3000 者 計 80 ( オセアニア ( 人 人 ） 2500 ） 60 2000 アフリカ 1500 不明 40 1000 20 500 0 0 Feb. 2019 Sep. 2008 登録日 ヨーロッパ About 4611 registered users from 117 countries at the end of Feb.2019 オセアニア Oceania 2% アフリカ number of GSMaP registration users for each country 不明 オセアニア ヨーロッパ , 270 , 6% Africa 4% アフリカ 北米・中南米 不明 日本 Europe 7% 北米・中南米 , 9% ヨーロッパ Japan Americas 9% 日本 , 1373 , 33% 32% 北米・中南米 日本 Asia There are many users from overseas. (except for Japan) アジア（海外）（中東含む） , 1915 , 46% 78% users are originated from Asian countries. アジア（海外）（中東含む） 46 % アジア（海外）（中東含む） 7 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019 日本 アジア（海外）（中東含む） 北米・中南米 ヨーロッパ アフリカ オセアニア 不明 日本 アジア（海外）（中東含む） 北米・中南米 ヨーロッパ アフリカ オセアニア 不明 日本 アジア（海外）（中東含む） 北米・中南米 ヨーロッパ アフリカ オセアニア 不明
GSMaP Product list Product name Variables Resolution Latency Update interval Standard Hourly Precip Rate Horizontal: 3 days 1 hour 0.1 × 0.1 product ( GSMaP_MVK ) deg.lat/lon Gauge-adjusted Hourly Precip Rate ( GSMaP_Gauge ) Temporal: 1 hour Near-real-time Hourly Precip Rate 4 hours product ( GSMaP_NRT ) GSMaP uses NOAA/CPC unified rain gauge (2-3 day latency, daily) Gauge-adjusted Hourly Precip Rate (GSMaP_Gauge_NRT) Real-time Hourly Precip Rate 0 hours 0.5 hour product ( GSMaP_NOW ) In addition, there are reanalysis products (GSMaP_RNL, GSMaP_RNL_Gauge), calculated with Japanese 55-year reanalysis (JRA55), and GSMaP Riken NowCast (GSMaP_RNC, Otsuka et al. 2016) by AICS/RIKEN. 8 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Extension of GSMaP_NOW • JAXA has provided the GSMaP realtime product (GSMaP_NOW) in the domain of JMA GEO-Himawari since Nov. 2015. – The rainfall estimates are provided just now (0hr-latency) • The GSMaP_NOW domain has been extended to the EUMETSAT GEO region (Meteosat/MSG) since 1 st Nov 2018. Previous GSMaP_NOW (JMA GEO-Hiimawari region) Updated GSMaP_NOW (JMA GEO-Hiimawari region + EUMETSAT Meteosat/MSG) Extension of the NOAA GOES regions is on-going. 9 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Validation results of the GSMaP Japan • Radar/Raingauge-Analyzed Precipitation data - provided by JMA - Resolution: 1km/30-min JMA 20 C-band Doppler weather radars JMA 1300 rain gauge stations U.S. • Multi-Radar Multi-Sensor (MRMS) Dataset - provided by NASA GV team - Resolution: 0.01 o / 2-min 10 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Validation in the U.S. • The GSMaP_MVK v6 product well-corresponded to the MRMS data over the US. US MRMS data Shade: sampling +40% GSMaP MVK [mm/h] red dot: mean 0% red bar: stddev -40% • June-July-August 2015 • daily mean precipitation MRMS NMQ[mm/h] in 1.5 x 1.5 degrees was calculated. 11 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Validation in the Japan • The GSMaP_MVK v6 product well-corresponded to the JMA Radar/gauge data over the Japan, except for higher rain rates over the Japan (probably due to the orographic heavy rainfall). Japan JMA Radar/gauge data Shade: sampling +40% red dot: mean 0% red bar: stddev GSMaP MVK [mm/h] -40% • June-July-August 2015 • daily mean precipitation JMA Radar/gauge [mm/h] in 1.5 x 1.5 degrees was calculated. 12 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
GSMaP validation for various spatial/temporal resolutions • Validation analyses in Japan using JMA radar/gauge analyzed data and GSMaP_NRT were conducted in various resolutions. • The accuracy got better as the spatial/temporal resolution became coarser. Correlation Coefficient 3-month accumulated precip(JJA 2015) RMSE (a) JMA radar/gauge data (b) GSMaP NRT temporal res. [hour] temporal res. [hour] 1 3 6 12 24 1 3 6 12 24 1.20 0.93 0.78 0.63 0.51 0.1 0.1 0.37 0.45 0.49 0.53 0.58 Spatial res. [deg] Spatial res. [deg] 1.00 0.82 0.70 0.58 0.47 0.3 0.3 0.45 0.52 0.55 0.59 0.63 0.86 0.72 0.63 0.52 0.42 0.5 0.5 0.51 0.56 0.60 0.62 0.67 0.70 0.61 0.54 0.45 0.37 0.8 0.8 0.57 0.61 0.64 0.67 0.71 0.66 0.58 0.51 0.43 0.35 1.0 1.0 0.61 0.65 0.68 0.70 0.73 ※ The unit for RMSE is unified to mm/h. High res. Low res. 0.1 deg. 1-hourly 1.0 deg. 24-hourly 0.5 deg. 6-hourly CC:0.37 CC:0.60 CC:0.73 GSMaP NRT [mm/h] GSMaP NRT [mm/h] GSMaP NRT [mm/h] RMSE 1.20 mm/h RMSE 0.63 mm/h RMSE 0.35 mm/h from 25 ％ -tile to 75 %tile 50%tile mean 13 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019 JMA radar/gauge data[mm/h] JMA radar/gauge data[mm/h] JMA radar/gauge data[mm/h]
Integration of Satellite data and Ground Radar data Good Algorithm • development World coverage in hourly time-scale Bad GSMaP • Less accurate (due to (MW-IR merged product) passive sensors) Calibrator Calibrator Satellite radar Good • Accurate Good • Stable calibration • Accurate • World coverage • Frequent observation in a Bad specific region • Not frequent observation Bad in a specific region • Unreliable calibration Ground radar • Limited coverage 14 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Integration of Radar + GSMaP (Philippines) Ground DPR Ground radar radar Weighting function , beam considering ground radar height beam height Integrated Rainfall (Radar + GSMaP ) GSMaP (not calibrated) Calibrated GSMaP 15 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
Integration of Radar + GSMaP (Fiji) Ground DPR Ground radar radar Weighting function , beam considering ground radar height beam height Integrated Rainfall (Radar + GSMaP ) GSMaP (not calibrated) Calibrated GSMaP 16 RA II WIGOS Workshop - Regional WIGOS Centres (RWCs) and its services for Members, Tokyo, Japan,6-9 March 2019
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