Novel Regional Modeling Approaches for Current and Future Tropical Weather and Climate

Novel Regional Modeling Approaches for Current and Future Tropical Weather and Climate

🎙 Kelly Nunez Ocasio 👥 603 📅 October 10, 2025 ⏱ 58 min 👁 123 📄 original study 🧭 2026-08-16
Available in: English (current) Français

Keywords

African Easterly JetWest African Monsoonmesoscale convective systemspseudo-global warmingMPAS-A

Summary

The seminar presents two main research areas. First, the speaker investigates how African easterly waves (AEWs) and mesoscale convective systems (MCSs) interact and how they may change under future warming. Using convection-permitting simulations with MPAS-A and a pseudo-global warming approach, she finds that under mid-century warming, the African Easterly Jet (AEJ) and West African Monsoon become more intense but shift northward. This leads to increased rainfall over the Sahel and regions of high topography, while AEWs take longer to intensify into tropical cyclones, potentially shifting the peak of Atlantic hurricane season. Second, she introduces the Mesoamerica Affinity Group (MAAG), an NSF NCAR-supported initiative, and presents a high-resolution simulation of Hurricane Maria (2017) using a variable-resolution mesh (15-3 km), which shows strong performance in simulating precipitation and the ITCZ. The talk emphasizes the importance of convection-permitting models for understanding tropical systems and their response to climate change.

146 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into the use of convection-permitting regional models to study tropical weather and climate, addressing a critical gap in global climate models. The argumentation is solid, based on detailed model experiments and comparisons with observations. The speaker clearly explains the methodology, including the pseudo-global warming approach and moisture sensitivity experiments, and presents results that challenge simple expectations, such as the finding that increased moisture can delay tropical cyclogenesis. The discussion of the 2024 Atlantic hurricane season adds practical relevance. The argumentation is coherent and well-supported by the presented data.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high, with the speaker referencing her own published work and collaborations with NCAR. The use of established models (MPAS-A) and methods (pseudo-global warming) adds credibility. The sources cited are primarily the speaker’s own research and institutional links, which are appropriate for a seminar talk. The title accurately reflects the content, focusing on novel regional modeling approaches for tropical weather and climate. No comments were provided, so no analysis of public trends is included.

185 words

Title / Content Match

The title accurately reflects the content, which focuses on novel regional modeling approaches for tropical weather and climate, covering both current and future scenarios.

Quality & Reliability

8/10

The talk presents original research using state-of-the-art convection-permitting models and pseudo-global warming experiments, with clear methodology and results. The speaker is an assistant professor at Texas A&M University, and the work is supported by collaborations with NCAR. The presentation is scientifically rigorous, though it is a seminar talk and not peer-reviewed.

Key Moments

Cited Sources

Concurring Sources

Contribution & Novelties

The talk presents novel applications of convection-permitting regional modeling to tropical weather and climate, specifically using MPAS-A with variable-resolution meshes and pseudo-global warming. It provides new insights into how increased moisture and warming may alter the African Easterly Jet and monsoon, potentially delaying tropical cyclogenesis. The introduction of the Mesoamerica Affinity Group and the public dataset for Hurricane Maria simulation is a valuable contribution to the community.

Pour aller plus loin :

93 words

Radar Profile

The radar profile shows high scores across all dimensions, indicating a well-rounded and scientifically rigorous presentation. The talk excels in information quantity, quality, technical depth, and reliability, making it a valuable resource for researchers and advanced students in atmospheric sciences.

Reliability 8/10