LATTIN: A Python-based tool for Lagrangian atmospheric moisture and heat tracking

Pérez-Alarcón, Albenis; Fernández-Alvarez, José C.; Nieto, Raquel; Gimeno, Luis

doi:10.1016/j.simpa.2024.100638

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Finally, we obtained the spatial distribution of the moisture sources by summing the fractional moisture contribution of all parcels in the atmospheric column over each grid of 1 • × 1 • . This Lagrangian moisture source approach has been coded in the Lagrangian atmospheric moisture and heat tracking tool (LATTIN; Pérez-Alarcón et al, 2024).…”

Section: Lagrangian Moisture-tracking Methodsmentioning

confidence: 99%

Quantifying the related precipitation and moisture sources in the lifecycle of subtropical cyclones in the South Atlantic basin

Pérez‐Alarcón,

Coll‐Hidalgo,

Fernández‐Alvarez

et al. 2024

Quart J Royal Meteoro Soc

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This study applies a Lagrangian approach to identify the origin of moisture for subtropical cyclones (SCs) along their tracks in the South Atlantic Ocean (SAO) basin from 1980 to 2015. The analysis shows that the local evaporation cannot fully explain the moisture gained by SCs, highlighting the role of external sources in moisture support, mainly through the northeasterly winds associated with the South Atlantic Subtropical Anticyclone. Overall, the northwestern SAO was the principal moisture source for SCs. It was noticeable that its contribution (~40%–45%) remained quasi‐constant during the year. Conversely, the moisture supplied from the northeastern SAO, southwestern SAO and the terrestrial source southeastern Brazil exhibited a marked seasonal variability. While contributions from the southwestern SAO intensify (weaken) in austral winter (summer), the southeastern Brazil source is more intense (weak) in summer (winter). In addition, SCs predominantly gain atmospheric humidity from sources close to their position, which reduces the mean water vapor residence time to ~3.2 days. Interestingly, we also found that ~42%–47% of the moisture that reached the SCs precipitates. These findings constitute a further step toward improving our knowledge of mechanisms underlying SC activity in the SAO basin.

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Section: Lagrangian Moisture-tracking Methodsmentioning

confidence: 99%

Quantifying the related precipitation and moisture sources in the lifecycle of subtropical cyclones in the South Atlantic basin

Pérez‐Alarcón,

Coll‐Hidalgo,

Fernández‐Alvarez

et al. 2024

Quart J Royal Meteoro Soc

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Assessing the Increasing Frequency of Heat Waves in Cuba and Contributing Mechanisms

Pérez-Alarcón,

Sorí,

Stojanovic

et al. 2024

Earth Syst Environ

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This study presents the first climatological analysis of heat waves in Cuba from 1951 to 2023. Here we define a heat wave as a period of at least three consecutive days in which the daily maximum and minimum temperatures exceed their respective calendar-day 99th percentile. Our analysis detected a total number of 393 heat waves (∼ 5.4 events per year over the three regions (western, central and eastern) during the study period, distributed ∼ 3.1 per year during the dry season (from November to April) and ∼ 2.3 per year during the rainy season (from May to October). The highest frequency was recorded in the western region of Cuba, albeit the eastern region is the hottest one. The analysis of the life cycle of the heat waves revealed that they are relatively short-lived, with a mean duration of ∼ 4.9 and ∼ 5.3 days in the dry and rainy seasons, respectively. Furthermore, we found a statistically significant (p < 0.05) upward trend in the frequency, intensity, spatial extent and annual number of days under such hot extremes. The Lagrangian heat analysis revealed a predominantly local origin of the sensible heating, followed by heat advected from upwind sources throughout the easterly winds. An assessment of the main physical mechanisms associated with these heat waves revealed that, in general, these hot extremes were exacerbated by the soil moisture deficit, high-pressure conditions and associated clear skies and increased solar radiation. Based on the Heat Wave Magnitude Index, we also presented the top 10 Cuban heat waves, which mainly occurred in the last decade, confirming the upward trend in the intensity of these extreme events. Overall, this study provides insights into the heat waves in Cuba and contributes to the development of physically plausible storylines to help decision-makers in implementing mitigation and adaptation strategies in the context of global warming.

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Evaluation of WRF model configurations for dynamic downscaling of tropical cyclones activity over the North Atlantic basin for Lagrangian moisture tracking analysis in future climate

Pérez-Alarcón,

Vázquez,

Trigo

et al. 2024

Atmospheric Research

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LATTIN: A Python-based tool for Lagrangian atmospheric moisture and heat tracking

Cited by 4 publications

References 31 publications

Quantifying the related precipitation and moisture sources in the lifecycle of subtropical cyclones in the South Atlantic basin

Quantifying the related precipitation and moisture sources in the lifecycle of subtropical cyclones in the South Atlantic basin

Assessing the Increasing Frequency of Heat Waves in Cuba and Contributing Mechanisms

Evaluation of WRF model configurations for dynamic downscaling of tropical cyclones activity over the North Atlantic basin for Lagrangian moisture tracking analysis in future climate

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