MPAS | PGW Literature Review
- Pseudo-Global Warming (PGW) - Future Projection
- NWP | Pseudo-Global-Warming (PGW) hands-on | ERA5 | GFS
- NWP | PGW | To prepare the ERA5 GRIB file
PGW Literature Review on MPAS-A
- Nunez Ocasio, Kelly M., and Erin M. Dougherty. "The effect of pseudo‐global warming on the weather‐climate system of Africa in a convection‐permitting model." Geophysical Research Letters 51.24 (2024): e2024GL112341.
- This study uses the pseudo‐global warming (PGW) method in convection‐permitting simulations to assess the impact of anthropogenic warming on Africa's weather‐climate system prior to and during Hurricane Helene's (2006) formation.
- To our knowledge, no study have used the PGW method to examine tropical precipitation with the MPAS‐A model.
- MPAS‐A version 8.0.1 with the Limited‐Area configuration
- A 15‐km–3‐km variable‐resolution mesh was used with the an elliptically shaped 3‐km highresolution refinement region of the mesh.
- At 3 km, deep convection was explicitly resolved.
- To simulate the period of 1200 UTC 8 September–1800 UTC 13 September 2006
- In addition to initializing the model at 1200 UTC on 8 September, two other sets of experiments were completed: initializing the model at 00 UTC on 5 September and initializing at 00 UTC on 6 September.
- A limitation of the study is that it uses only one future projection scenario and one climate model for simulations of short integration time.
- The dataset (Download)
- Kelly Marie Núñez Ocasio, Erin Dougherty, Zachary Moon, et al. Response of African Easterly Waves to a Warming Climate: A Convection-Permitting Approach. ESS Open Archive . April 24, 2025.
- The MPAS-A version 8.0.1 (Skamarock et al., 2012) regional convection-permitting data used here, as described by Nunez Ocasio and Dougherty (2024a).
- The buffer region between the 15-km resolution mesh and the refined 3-km resolution area ensures smooth transitions from coarse to fine resolution while maintaining computational efficiency and effectively reducing any artificial features from the nested domain-type boundaries as in other models like WRF.
African easterly wave (AEW) tropical cyclogenesis (TCG)
- Núñez Ocasio, K. M., & Rios‐Berrios, R. (2023). African easterly wave evolution and tropical cyclogenesis in a pre‐Helene (2006) Hindcast using the Model for Prediction Across Scales‐Atmosphere (MPAS‐A). Journal of Advances in Modeling Earth Systems, 15(2), e2022MS003181.
- Tropical cyclogenesis (TCG) remains an elusive phenomenon partly due to the limited understanding of complex water vapor-convection-wave interactions. The Model for Prediction Across Scales-Atmosphere (MPAS-A) was used to study the TCG of the African easterly wave (AEW) that became Hurricane Helene (2006). The two main objectives were:
- evaluate the capability of MPAS-A to simulate TCG from an AEW by comparing MPAS-A—initialized with the Integrated Forecasting System (IFS) and the Global Forecast System (GFS)—with observations together with reanalysis and,
- use the hindcast to investigate the role of moisture in the mechanisms that led to Helene's TCG.
- MPAS-A version 7.1
- A uniform 15-km cell-spacing global grid and 55 vertical levels
- The model outputs were interpolated to a latitude and longitude grid equivalent of a 0.25° × 0.25° horizontal resolution to be comparable to ERA5
- Data Availability Statement:
- Post-processed model outputs and the namelists for the MPAS-A simulations can be accessed at https://doi.org/10.5065/t224-6s94. IMERG data were provided by NASA's Goddard Earth Sciences Data and Information Services Center (https://disc.gsfc.nasa.gov/). The ERA5 (https://rda.ucar.edu/datasets/ds633.0/) and GFS (https://rda.ucar.edu/datasets/ds083.2/) data were accessed via NCAR Research Data Archive through the Computational and Information Systems Laboratory (CISL). The HURDAT2 track was accessed through the NOAA NHC official page (https://www.nhc.noaa.gov/data/hurdat/hurdat2-format-atlantic.pdf).
- Tropical cyclogenesis (TCG) remains an elusive phenomenon partly due to the limited understanding of complex water vapor-convection-wave interactions. The Model for Prediction Across Scales-Atmosphere (MPAS-A) was used to study the TCG of the African easterly wave (AEW) that became Hurricane Helene (2006). The two main objectives were:
- Dr. Kelly Nuñez Ocasio
- National Center for Atmospheric Research
- Title: The Multiscale Nature and Moisture Dependency of Tropical Cyclone Formation (2023-02-09)
MPAS | PGW Literature Review
https://waipangsze.github.io/2025/04/29/MPAS-PGW-Literature-Review/