Uma contribuição a climatologia da dinâmica da troposfera sobre a Amazônia (*)

Kousky, Vernon E.; Molion, Luiz Carlos Baldicero

doi:10.1590/1809-43921985153320

Cited by 7 publications

(4 citation statements)

References 6 publications

(6 reference statements)

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“…It is known from earlier work (Garstang et al 1994;Kousky and Molion 1981;Molion 1987) that intense and areally extensive squall-line MCSs form in the northeast coastal zone of South America, in response to daytime maximum of convergence, where the easterlies coming from the Atlantic slow down over the continent. This profound coastal convergence zone is evident in the NCEP-NCAR winds in Figs.…”

Section: Squall Lines Form In the Nec And Move Into The Amazon Regionmentioning

confidence: 99%

Extreme Summer Convection in South America

2010

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Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) and National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis data are used to indicate mechanisms responsible for extreme summer convection over South America. The three-dimensional reflectivity field is analyzed to define three types of extreme echo, deep convective cores, wide convective cores, and broad stratiform regions. The location and timing of these echoes are sensitive to midlatitude synoptic disturbances crossing the Andes. At the leading edges of these disturbances the nocturnal South American low-level jet (SALLJ) transports moisture along the eastern edge of the Andes from the tropical to the subtropical part of the continent. Where the SALLJ rises over lower but steep mountains on the east side of the southern central Andes, deep and wide convective cores are triggered in the evening. When the SALLJ withdraws to the north as the disturbance passes, nocturnal triggering occurs in the northeastern foothills of the central Andes. Extreme convection over the Amazon basin takes the form of broad stratiform regions that evolve from systems with wide convective cores moving into the center of the region from both the southwest and northeast. The systems from the northeast form at the northeast coast and are likely squall lines. Along the coast of the Brazilian Highlands, diurnal/topographic forcing leads to daytime maxima of deep convective cores followed a few hours later by wide convective cores. Wide convective cores and broad stratiform regions form in the South Atlantic convergence zone (SACZ) with a diurnal cycle related to continental heating.

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Section: Squall Lines Form In the Nec And Move Into The Amazon Regionmentioning

confidence: 99%

Extreme Summer Convection in South America

2010

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“…Another common feature of these SH winter waves is that they produce very little precipitation (convective or large-scale precipitation). Starting in the SH spring, the frontal systems continue to propagate over Brazil, but they move more slowly and they are very important in organizing regional convection [Kousky and Molion, 1981;Oliveira and Nobre, 1986;Figueroa, 1997]. The SACZ is a zone where frontal systems become climatologically quasi-stationary [Kodama, 1992;Kousky, 1979;Figueroa, 1997].…”

Section: South Americamentioning

confidence: 99%

Overview of atmospheric conditions during the Smoke, Clouds, and Radiation‐Brazil (SCAR‐B) field experiment

Nobre¹,

Mattos²,

Dereczynski³

et al. 1998

J. Geophys. Res.

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“…The displacement of the intertropical convergence zone (ITCZ), which advances towards the northern hemisphere (Kousky & Molion, 1985) at the beginning of the second half of the year, explains the rapid increase of the climate risk in most of the region at the end of the wet season. The ITCZ is the primary rain-generating system in Eastern Amazon during the wet season, notably in Maranhão state and northeastern of Pará state (Aguiar et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Calibration of SARRA-H model for climatic risk zoning of cowpea in Eastern Amazon

Souza,

Pinto,

Nunes

et al. 2024

Rev. bras. eng. agríc. ambient.

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This study aimed to calibrate and test the SARRA-H (Système d’Analyse Régionale des Risques Agroclimatologiques) crop model for cowpea, as well as conducting a climate risk zoning for this crop in a region located in Eastern Amazon, allowing the identification of locations and sowing dates that favor the production considering both the water deficit and the probability of occurrence of severe rains during the harvest period. The model was calibrated and validated with data from experiments conducted between 2013 and 2016 in the municipality of Castanhal, PA, Brazil. Low climate risk areas were defined as those that had a water requirement satisfaction index (WRSI) greater than or equal to 0.5 in the reproductive phase combined with the occurrence of rainfall below 20 mm at the harvest for, at least, 80% of the years for which planting was simulated. The model was able to simulate the water balance, growth and development of cowpea under the climate and soil conditions of the studied location with high precision and accuracy. The optimal period for sowing cowpea comprises the interval between June 5th and 25th for regions located above 2° S and between March 25th and April 15th for regions below 2º S.

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Uma contribuição a climatologia da dinâmica da troposfera sobre a Amazônia (*)

Abstract: RKSUMO

Cited by 7 publications

References 6 publications

Extreme Summer Convection in South America

Extreme Summer Convection in South America

Overview of atmospheric conditions during the Smoke, Clouds, and Radiation‐Brazil (SCAR‐B) field experiment

Calibration of SARRA-H model for climatic risk zoning of cowpea in Eastern Amazon

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