Rainfall Distribution on the Metropolitan Area of Rio de ... · PDF fileTom Jobim Airport...
Transcript of Rainfall Distribution on the Metropolitan Area of Rio de ... · PDF fileTom Jobim Airport...
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Hugo Abi Karam
Laboratory of Experimental HydrometeorologyIGEO/CCCM/UFRJ
August 10, 2012
Rainfall Distribution on the Metropolitan Area of Rio de Janeiro
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Complex terrain
NASA
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Topography of the MARJ
SRTM-NASA
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Potential Temperature
Tom Jobim Airport (SBGL)
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Specific Humidity
Tom Jobim Airport (SBGL)
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Air pressure
Tom Jobim Airport (SBGL)
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Lift Condensation Level
Tom Jobim Airport (SBGL)
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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UHI along the months of year and hours of day
Marques Filho et al (2009)
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Meridional component of the wind
Tom Jobim Airport (SBGL)
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Features of the UHI of Rio
Presence of a diurnal UHI in Rio and São Paulo cities
The antropogenic flux is (very) small than the insolation
flux
Insolation is very large in the tropics
Sea breeze is able to reduce the amplitude of the
diurnal UHI in the afternoon and evening
Meridional component of the sea breeze (S) converges
on the northward steep terrain of Serra do Mar, at the
north edge of Guanabara bay.
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J. L. Flores R. et al (2012, being submitted)
MODIS surface temperatureretrieval
Diurnal Urban Heat IslandStructure
August 30, 2011
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Urban Heat Island (comparison)
30 Aug 2011, MODIS
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Precipitation
Espatial Structure
GEORIO raingauge network
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Time series analysis
Comparison of raingauge measurements throughout the network
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Rainfall Histogram ( for instance )
● Positive skewness
(mm by hour)Precipitation > 0
Tail Q > Q(98%)
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Cumulative distribution function
Rainfall rate (mm h-1)
m Q 90%
Anchieta rain gauge
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Distribution of hourly precipitation in Rio throughout the year (mm h-1)
Anchieta rain gauge Convective delay from summer to fall
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The South Atlantic Convergence Zone (SACZ)
Additional factor for severe weatherlarger water vapor density in average depth of the troposphere
SACZ can be correlated with high rainfall amountsin SE part of Brazil(Carvalho and Jones, 2002,2004)
EUMESAT, WV March 25, 2012
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Life cycle of Aedes aegypt
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Enough water (~10 cm) into the breeding jars will permit the metamorphosis of larvae and pupae
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Infectious Dengue disease Modeling: breeding and survival rates
Mortality rate of eggs throughout the year
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Proposition: linear reservoir model
Rainwater can accumulate water in urban containers in which the stagnant water is used to eclode eggs, breed larvae and pupae. The density of the larval population and food supply within the breeding water can be critical. This is a basic idea used in our proposed entomological parametrization.
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Basic structure of the White's infectious disease model used for dengue fever human population dynamics
J.C.B. Silva et al. (2012, submitted)
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Boxplot: sazonal variation of dengue infection notifications
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Degree-day correlation
Degree-day (J kg-1)since July 1st
Degree-day variation(J kg-1 s-1)
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Linear Point Vector Method (LPVM)
Kinematic properties: Vertical component of the vorticity vector Divergence Shearing deformation Stretching deformation
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Three weather stations (airports)
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Conceptual model
CONV
CONV
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Average meridional component of the wind
Average convergence (in blue)
Meridional Component of the Sea Breeze
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Convection at the fund of Guanabara Bay
LOCAL TIME17:45 h
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Metar report from SBGL
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Outlines
Introduction Urban Heat Island of Rio de Janeiro Precipitation Dengue infectious disease Modeling Sea-breeze flow Convection associated to the sea breeze Hydrological Modeling Calibration of solar radiation parameterizations Shadows effects in complex terrains
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Scarp of Serra do Mar
Northward of Metropolitan Area of Rio de Janeiro
Plainwater Hydrology
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Topographic Gradient
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Uphill Area (Source)
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HydroNet of INEA at the NW edge of the Guanabara Bay
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47Average diurnal cycle in the first months of 2011
Diurnal cycle of the rainfall and river heights
Rainfall River heights
Summer to fall
The time scale of the watershed is approximately 3 h
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Outlines
Introduction
Urban Heat Island of Rio de Janeiro
Precipitation
Dengue infectious disease Modeling
Sea-breeze flow
Convection associated to the sea breeze
Hydrological Modeling
Calibration of solar radiation parameterizations
Shadows effects in complex terrains
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Calibration of solar radiation models
Comparing two parameterizations?
Turn on OR turn off the n flags in the model namelist to define the essays of the factorial experiment 2n
Other way
Let's sure that every parametrerization was calibrated using the same data series (like in the momentum method), yielding zero bias (no sistematic erros).
Draw up the optimized parameters inline through the code of the mesoscale model.
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Multi-parameter optimization
”There are less than expected tropospheric aerosols”
Brute Forceand Simplex methods
Broadband solar radiation parameterizations useful for complex terrain in the tropics
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Shadows model → SEB
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The Urban Heat Island (UHI) in São Paulo (MASP) and Rio de Janeiro (MARJ) is characteristically diurnal, as a response to the large incoming of solar radiation in contrast to the nocturnal UHI in mid-latitude cities, where anthropogenic heat source is determinant.
Sea breeze advection of cold air is enough to reducing the intensity of the diurnal UHI of Rio A preliminary hourly climatology for precipitation in MARJ was proposed
Stations in the rain gauge network of Rio can be grouped by cluster analysis.
The convective precipitation delays in the afternoon from summer to fall
We have investigated numerically the relationship between precipitation, environment energetics and the dynamics infectious disease Dengue.
Enough amount of accumulated energy in the environment is a condition to ripen female mosquitoes.
Summary
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Perspectives
1. Modeling
Couple the models:ARPS, TEB, SHADOWS and TOPMODEL
2. Urban fluxes measurements
Radiometric and micrometeorological platform is been placed above the roof at the School of Meteorology in IGEO-UFRJ using a
configuration that is twin of the existent at the School of Atmospheric Science in IAG-USP
(Marques Filho et al., 2012, project FAPESP-FAPERJ)
E-mail: [email protected]
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Questions