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CHUVA, meaning “rain” in Portuguese, is the acronym for the Cloud processes of tHe main precipitation systems in Brazil: A contribUtion to cloud resolVing modeling and to the GPM (GlobAl Precipitation Measurement). The CHUVA project has conducted five field campaigns; the sixth and last campaign is in isnide the GoAmazon campaign. CHUVA's main scientific motivation is to contribute to the understanding of cloud processes, which represent one of the least understood components of the weather and climate system.

CHUVA Project – The GoAmazon Campaign

X Band radar – all data available in CHUVA database (web access) – UF format volscan and RHI and level 1 – attenuation correction

Radar Strategy for First IOP

The X-Band radar scanning strategy for the Manaus campaign will produce one volume scan with 15 elevations (varying from 0.5 to 30 degrees), 7 elevation scans and 1 azimuth scan. All the scans is within a 10 minute window. a) The 15 elevations in the volume scan provide a detailed tri-dimensional look of the weather system structures. Precipitation and reflectivity CAPPIs is derived from this volume and is available at real time on the CHUVA experiment web page. b) 6 fixed-azimuth elevation scans will be performed, starting at 200 degrees and ending at 350 degrees, with an interval of 30 degrees, with a range of 180 degrees in elevation, as pictured below. This 200 degree orientation angle is necessary since our main instrumentation site is located 10 km and 200 degrees from the T3 site. c) The azimuth scan will be used to check the ZDR offset, since the antenna will be pointedal most vertically (89 degrees).

Second IOP – Proposal to run the same strategy, but special scan will be perfomed during flight and important weather situation. Open for discussion – radar operation group


Real Time Web based geographical Information System including radar data from CHUVA and SIPAM for real time assistance of Airplane Operation and Civil Defense Support during the Campaign.

On line – near real time data SIPAM S Band and X Band + satellite and Models

Very – Very – Very Prelimnary Results – more details in Micael´s Poster

Very – Very – Very Prelimnary Results

Monsoon Cloud Type (wet season) Convective Stratiform

6 km

4,5 km

Mostly liquid water – ice only in downdraft region

Mostly ice – plates and columnar

Research Topics for Second IOP GoAmazon (ACRIDICON-CHUVA+IARA)

1) Cloud Life Cycle and Aerosol effect Life cycle of rain cells (S Band and X Band) and GOES Satellite

Previsão Fortracc - Radar 25/11/2006 - 20:30Z

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19:45 20:00 20:15 20:30 20:45 21:00 21:15

Hora (Z)

Tam

anho

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pixe

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Previsão

Real

Check DSD, lifetime, size over the plume and outside. Check ice type and typical vertical distribution. Check dual-Pol characteristics against CPI and over clean and polluted regions. Water-mixed-ice layers differences

2) DSD parameterization – ice, liquid water, super cooled liquid water as F(life cycle, aerosol)

3) The turbulence Effect on cloud organization – Tracer Experiment.

4) W band radar (cloud radar) + X Band (radar) + airplane – differences between ordinary clouds and those that evolves to thunderstorm. Water-mixed-ice layers


5) Upper level divergence – mass flux and the differences among forest and deforested clouds – polluted and clear.


6) Microphysical properties and the first lightning

Figure 1 - Time-height plot de uma tempestade isolada do CHUVA-Vale em 10 de

Novembro do 2011 às 18:48 UTC. (a) refletividade (Zh, dBZ), (b) refletividade diferencial

(Zdr, dB) e fase diferencial específica (Kdp, okm

-1). Linha preta em (a) é o raio efetivo em 6

km de altitude para região com mais de 20 dBZ. Na Fig. 1b e 1c a linha tracejada preta

representa a área com Zdr and Kdp negativos dividido pela área total, enquanto a linha azul é

mínimo Zdr e Kdp, respectivamente. As linhas verticais preta e azul denotam relâmpagos IN

e NS, os números são a multiplicidade dos relâmpagos. Fonte: Mattos et al. (2014).

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