Topoclimate in Morlet, Cross and Coherence Wavelet Analyses in the Brazilian Cerrado

Rocha, Ângela Fátima da; Silva, Ernany Paranaguá da; Musis, Carlo Ralph de

doi:10.1590/2179-8087.107917

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…The temperature, relative humidity, and wind data were collected at 5-min intervals and analyzed during the dry and rainy seasons for specific time periods between 2015 and 2016. ONSET ® microweather stations with storage sensors and remote data transmission were used in this study (ROCHA, SILVA, MUSSIS, 2018).…”

Section: Methodsmentioning

confidence: 99%

Multiscale Environmental Monitoring in Urban Topoclimate

Rocha

Silva

Mussis

et al. 2019

ABClima

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Climate is a complex system subject to much natural and anthropogenic interference. Urban microclimates and topoclimates need effective methodologies to localize coexisting phenomena, including multiscale approaches that demonstrate their relational character. Air temperature, air relative humidity, and wind are microclimatic variables that can be evaluated with respect to their qualitative energy flow characteristics. The technical performance of this monitoring depends on a good estimate of the statistics of the digital signal assessed, which in turn represents greater care in the management and implementation of structural change indicators derived from frequency-domain modeling. Therefore, this study aimed to analyze the power spectra of the air temperature, air relative humidity and wind data series using the traditional Morlet Continuous Wavelet Transform (CWT) and the Cross Wavelet Transform (XWT), with Wavelet Coherence (WC) analysis. The daily, monthly and annual scales were studied, and the results demonstrated significant interrelationships between the variables. The WC values found were validated by the Monte Carlo method, scalograms and spectrograms, representing seasonal and daily cycle frequencies. The urban fractions presented behavior in accordance with the seasonality of tropical climates of the Cerrado, as well as of interference of the urban roughness. The CWT, XWT and WC tools are adequate for urban monitoring and planning analyses, qualitatively reflecting the urban dynamics of microenvironments

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Section: Methodsmentioning

confidence: 99%

Multiscale Environmental Monitoring in Urban Topoclimate

Rocha

Silva

Mussis

et al. 2019

ABClima

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“…Studies such as these are important in supporting environmental diagnoses, in addition to providing knowledge of small-scale mechanisms that influence local circulation and the regional climate (Bitencourt et al, 2016). Thus, the WT has been used in several studies on atmospheric phenomena (Echer et al, 2008;Blain and Kayano 2011;Moura and Vitorino, 2012;Vilani and Sanches, 2013;Rocha et al, 2018;Rocha et al, 2019), hydrological systems (Sassi et al, 2011;Santos et al, 2013;Guo et al, 2015;Sun et al, 2016), and tidal studies (Danial et al, 2019).…”

Section: Open Access Edited Bymentioning

confidence: 99%

Analysis of the wind regime at high spatial-temporal resolution in the itacaiúnas river watershed, eastern amazon

Tavares¹,

Silva²,

Carmo³

et al. 2023

Front. Earth Sci.

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In the present study, hourly wind direction and speed data from six subregions along the Itacaiúnas River watershed (IRW), Eastern Amazon, are analyzed over a 1-year period. The data are acquired from six hydrometeorological stations located in areas of the IRW with different characteristics of land use and plant cover. Among the stations studied, Serra Leste (mine to pasture transition) stands out, with prevailing winds from the Southeast and the East-Southeast, in addition to higher wind speeds. In contrast, at the Salobo (forest) station, the lowest wind speeds are observed, and this station presents the highest percentage of calm winds (60%) in the series. In the analysis of the daytime (from 6 a.m. to 5 p.m.) and nighttime (from 6 p.m. to 5 a.m.) wind cycles, the breeze and mesoscale circulation system are identified. Predominantly northerly winds are observed acting on the Abadia Farm and IFPA Rural (Federal Institute of Education, Science and Technology of Pará) stations, both during the day and at night, overlapping with the local breeze effects. Daily (24 h) and associated breeze circulation (12 h) cycle frequency signals are identified through wavelet transform analyses of the wind for all stations. The interference from large-scale phenomena, such as the Intertropical Convergence Zone (ITCZ) and the South Atlantic Convergence Zone (SACZ), which operate in the region, is evident. Finally, the data show that the differences in wind patterns are also due to environmental aspects such as plant cover, land use, and topography.

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Topoclimate in Morlet, Cross and Coherence Wavelet Analyses in the Brazilian Cerrado

Cited by 2 publications

References 12 publications

Multiscale Environmental Monitoring in Urban Topoclimate

Multiscale Environmental Monitoring in Urban Topoclimate

Analysis of the wind regime at high spatial-temporal resolution in the itacaiúnas river watershed, eastern amazon

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