Clouds and the2002 LBA Field Campaign

Alexandre A. CostaAlexandre A. Costa

Universidade Estadual do Ceará / UECEUniversidade Estadual do Ceará / UECE

Questions

What’s Amazon clouds microstructure?What’s Amazon clouds microstructure? What are the differences in the What are the differences in the

microstructure of dry and wet season microstructure of dry and wet season clouds? clouds?

How do such differences influence the How do such differences influence the larger scales?larger scales?

Enhanced Enhanced surface surface fluxesfluxes

Tropical clouds and climate

Clouds Clouds greenhouse greenhouse effecteffect

Blocking ofBlocking of Solar RadiationSolar Radiation Release Release

of latent of latent heatheat

Conceptual model

Polluted cloudsPolluted clouds Too many dropletsToo many droplets Low precipitation Low precipitation

efficiencyefficiency Need of ice-phase to Need of ice-phase to

produce rainproduce rain

Wet season cloudsWet season clouds Fewer dropletsFewer droplets Relatively large Relatively large

precipitation efficiencyprecipitation efficiency Development of Development of

warm rainwarm rain

Platform

UECE’s instrumented aircraftUECE’s instrumented aircraft

Pressure, temperature and humidity sensors

FSSP and Csiro-KingOAP 200X and 200Y

CCN counter

Global Positioning System

Data Acquisition System

Instrumentation

Campaign Summary (Flight Legs)72 flight hours:72 flight hours:

20020921-1, 20020921-2,20020921-3, 20020921-4 (transit from Fortaleza to Ji-20020921-1, 20020921-2,20020921-3, 20020921-4 (transit from Fortaleza to Ji-Paraná)Paraná)

20020923-1, 20020924-1, 20020926-1, 20020927-1, 20020928-1 (cloud base 20020923-1, 20020924-1, 20020926-1, 20020927-1, 20020928-1 (cloud base sampling, cloud vertical profiles, aerosol sampling, aerosol instrumentation sampling, cloud vertical profiles, aerosol sampling, aerosol instrumentation intercomparison, from Ji-Paraná – very smoky)intercomparison, from Ji-Paraná – very smoky)

20020930-1, 20020930-2, 20021001-1, 20021001-2 (cloud base studies, cloud 20020930-1, 20020930-2, 20021001-1, 20021001-2 (cloud base studies, cloud vertical profiles from Vilhena and Alta Floresta)vertical profiles from Vilhena and Alta Floresta)

20021004-1, 20021004-2, 20021004-3, 20021005-1, 20021005-2, 20021006-1, 20021004-1, 20021004-2, 20021004-3, 20021005-1, 20021005-2, 20021006-1, 20021006-2 (cloud vertical profiles, cloud base studies from Ji-Paraná to the 20021006-2 (cloud vertical profiles, cloud base studies from Ji-Paraná to the north of Cruzeiro do Sul)north of Cruzeiro do Sul)

20021008-1, 20021009-1, 20021011-1, 20021011-2, 20021012-1, 20021013-1, 20021008-1, 20021009-1, 20021011-1, 20021011-2, 20021012-1, 20021013-1, 20021014-1 (cloud vertical profiles, cloud base studies from Ji-Paraná – cleaner)20021014-1 (cloud vertical profiles, cloud base studies from Ji-Paraná – cleaner)

200215-1. 200215-2, 200216-1, 200216-2 (return to Fortaleza)200215-1. 200215-2, 200216-1, 200216-2 (return to Fortaleza)

200218-1 (CCN sampling, cloud base studies, cloud vertical profiles from 200218-1 (CCN sampling, cloud base studies, cloud vertical profiles from Fortaleza)Fortaleza)

Preliminary Results

Preliminary Results

Preliminary Results