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GPM Applications
Public Health
Pietro Ceccato
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Vector-Borne Diseases
Mosquito Sandfly
Malaria Leishmaniasis
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How Does Climate Information Help?
• Improve understanding of the mechanisms of climate impact on transmission and diseases
• Estimate populations at risk (risk mapping)
• Estimate seasonality of diseases and timing of interventions
• Monitor year-to-year variations in disease incidence (Early Warning Systems)
• Improve assessment of the impact of interventions (by removing climate as a confounder)
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Risk Mapping Seasonality
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Malaria Early Warning System
Case surveillance alone = late warning
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Impact AssessmentsEnable USAID/CDC President Malaria Initiative to account for the confounding effect of climate
variability when evaluating the national malaria control program’s interventions.
Lyon & Barnston, 2005
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Impact Assessments
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Which Prec. Products Do We Use for Research?Products Time Res Space Res Existence
TRMM-3B42 3-hourly and Daily 0.25 deg 1998-PresCMORPH Daily 0.25 deg 2002-PresCPC-RFE Daily 0.1 deg 2001-PresCPC-ARC Daily 0.1 deg 1995 - 2012TAMSAT 10-day ~0.05 deg 1983-2013CPC-RFE 10-day 0.1 deg 1999-PresGPCP Monthly 2.5 deg 1979-2010CMAP Monthly 2.5 deg 1979-2011TRMM-3B43 Monthly 2.5 deg 1998- 2013
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Monthly at 2.5-degree
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300 350 400
Gauge[mm]
Satellite[m
m]
GPCP_SG
CMAP
TRMM_3B43
N = 360 GPCP CMAP 3B43
CC 0.92 0.92 0.92
Bias 0.80 0.91 0.92
ME -30 -12 -12
Data: 1998-2004
Validation
Dinku et al., 2007; Dinku et al., 2010
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Validation10 Days at 1ºx1º
N=306
1DD 3B42 TAMSAT CMORPH
CC 0.68 0.68 0.79 0.83Bias 0.77 0.94 0.86 0.98ME -16 -4 -9 -1
Dinku et al., 2007; Dinku et al., 2010
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Improvement: IRI works with National Met. Agencies
A
CD
B
Rain gauge data (A), Satellite estimates (B), Gauge-only gridded products(C), and combined gauge-satellite product (D), over Ethiopia
Enhancing National Climate Services (ENACTS) products • Ethiopia,• Tanzania, • Madagascar, • West Africa (AGRYHMET)
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Which Prec. Products Do We Use Operationally?
Products Time Res Space Res Existence
TRMM-3B42 Daily 0.25 deg 1998-Pres
CMORPH Daily 0.25 deg 2002-Pres
CPC-RFE 10-day 0.1 deg 1999-Pres
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Which Prec. Products Do We Use Operationally?
TRMM and MODIS Land Surface Temperature are combined into a Vectorial Capacity Model for malaria transmission
proportion ofvectors surviving
feeding cycle
Temperature
humanbloodindex
humanpopulation
gontrophiccycle length
mosquitopopulation
probability ofdailly survival
Rainfallratio of humansto mosquitoes human biting
rate
sporogoniccycle length
human bitinghabit
probability ofsurviving
sporogeny
VectoralCapacity
productionfactor
Ceccato et al., 2012
Vectorial Capacity
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Access to Prec. via the IRI Data Library
Users want:• Easy access (visualization)• Easy download• Easy analysis• Spatial resolution at district level
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In specific countries: Enhancing National Climate Services (ENACTS) products.Ethiopia, Tanzania, Madagascar, West Africa (AGRYHMET)
Which Prec. Products Do We Use Operationally?
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IRI Data Library: Malaria Early Warning System http://iridl.ldeo.columbia.edu/maproom/Health/Regional/Africa/Malaria/System.html
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IRI Data Library: Desert Locust http://iridl.ldeo.columbia.edu/maproom/Food_Security/Locusts/index.html
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http://iri.columbia.edu
Pietro Ceccato, Stephen Connor, Tufa Dinku & Madeleine Thomson