Very - Inpe

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[email protected]
CHUVA Project – The GoAmazon Campaign
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
CHUVA Project – The GoAmazon Campaign
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 ice – plates and columnar
Mostly liquid water – ice only in downdraft region
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
300
Tamanho (numero pixels)
250
200
Previsão
150
Real
100
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
50
0
19:45
20:00
20:15
20:30
20:45
21:00
21:15
Hora (Z)
2) DSD parameterization – ice, liquid water, super cooled liquid water as F(life cycle, aerosol)
Research Topics for Second IOP GoAmazon (ACRIDICON-CHUVA+IARA)
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
Research Topics for Second IOP GoAmazon (ACRIDICON-CHUVA+IARA)
5) Upper level divergence – mass flux and the differences among forest and deforested clouds –
polluted and clear.
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
6) Microphysical properties and the first lightning
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).
Thanks
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