Categories - MPAS

55 posts in total

MPAS | CRITICAL ERROR NaN detected in 'w' field" crash after MPASv8.0.0 | config_len_disp

config_len_disp Regarding the 'config_len_disp' option, with MPAS v8.0 it's no longer necessary to specify this length scale if you're using new meshes from the mesh download page, since these new mes

2026-06-30

MPAS

#NWP #WRF #MPAS #NaN #config_len_disp

MPAS | Joint MPAS/WRF Users Workshop 2026 | MPASv8.4.1

Joint MPAS/WRF Users Workshop 2026 MPAS-Atmosphere: Update Data Assimilation with MPAS-JEDI: 2026 Annual update The Weather Research and Forecasting Model: 2026 Annual Update WRF development has sl

2026-06-25

MPAS

#NWP #WRF #MPAS

MPAS | Simple MPAS I/O Layer (SMIOL)

Simple MPAS I/O Layer (SMIOL) The Simple MPAS I/O Layer (SMIOL) is a lightweight, parallel I/O library introduced in MPAS v8.0+ as an alternative to the Parallel I/O (PIO) library. It provides necessa

2026-02-11

MPAS

#NWP #WRF #MPAS #SMIOL

MPAS | Tangential Velocity at Edge

Literature review Skamarock, W. C., Klemp, J. B., Duda, M., Fowler, L., & Park, S. H. (2010, November). Global nonhydrostatic modeling using Voronoi meshes: the MPAS model. In Proceedings of the

2026-02-11

MPAS

#NWP #WRF #MPAS #Tangential Velocity

MPAS | Eddy dissipation rate (EDR)

NWP | Eddy Dissipation Rate (EDR) Analysis and Simulations for the Severe Turbulence Event Aloft Myanmar on 21 May 2024. Leung, Christy Yan Yu, et al. "Analysis and Simulations for the Severe Turb

2025-11-10

MPAS

#NWP #MPAS #HKO #TKE #EDR #LES #CIT

NWP | Boussinesq and Anelastic Approximations in Atmospheric Science

Simplifying the Skies: An Introduction to Boussinesq and Anelastic Approximations in Atmospheric Science In the quest to understand and predict the complex motions of the atmosphere, scientists rely o

2025-10-15

MPAS

#NWP #WRF #MPAS #Boussinesq #Anelastic #density

MPAS | meshDensity

dx_p, len_disp, and meshDensity in NWP and specifically in MPAS-A, and their relationships: Definitions: dx_p: dx_p generally refers to the horizontal grid spacing or the local mesh resolution. It

2025-09-26

MPAS

#NWP #MPAS #meshDensity #dx_p #gray zone

MPAS | Real-Time Forecasts

MMM Real-Time Forecasts (MPAS) https://project.mmm.ucar.edu/real-time-forecasts/ The real-time forecasts produced with the Model for Prediction Across Scales-Atmosphere (MPAS-A) . These experimental

2025-09-09

MPAS

#NWP #WRF #MPAS #MMM

MPAS | WRF | FDDA | Spectral nudging

Nudging Nudging, also known as four-dimensional data assimilation (FDDA), is a method of keeping simulations close to analyses and/or observations or forcing data over the course of an integration by

2025-06-24

MPAS

#NWP #WRF #MPAS #FDDA #Spectral nudging

MPAS | Scalability | Speedup

WRF | MPAS | MPI | halo/ghost cell MPAS | -fp-model precise Speedup Introduction Speedup tells you how much faster your parallel algorithm can be than its sequential counterpart. Scalability tel

2025-06-23

MPAS

#NWP #WRF #MPAS #partition #precise #intel #gfortran #ifort

MPAS | Long Term Run study

Long run study SST udpated I will analyze the experimental design involving a 1-year NWP simulation using MPAS-A initialized with ERA5 data, comparing a control run with initial conditions to an exper

2025-06-20

MPAS

#NWP #WRF #MPAS #Climate

MPAS | xtime to pd.datetime

MPAS xtime format 1234[[b'2023-01-01_00:00:00 '] [b'2023-01-01_12:08:00 '] [b'2023-01-

2025-06-20

MPAS

#NWP #MPAS

MPAS | -fp-model precise

Overview The -fp-model precise flag is a compiler option used to control floating-point behavior in programs, ensuring strict adherence to value-safe optimizations when implementing floating-point cal

2025-06-11

MPAS

#NWP #WRF #MPAS #partition #precise #intel #gfortran #ifort

NWP | Why is RH preferred over mixing ratio for initial moisture in NWP models

MPAS-A https://mpas-dev.github.io/atmosphere/mpas-a_release_notes.html https://github.com/MPAS-Dev/MPAS-Model/commit/635532ebd0677675eafcaa07c1bc701997b896fe MPAS-Atmosphere Version 5.3 22 March 201

2025-06-05

MPAS

#NWP #WRF #MPAS #GFS #ERA5 #RH #mixing ratio

MPAS | Joint MPAS/WRF Users Workshop 2025 | MPASv8.3.0

Joint MPAS/WRF Users Workshop 2025 | 3-6 June 2025 MPAS-Atmosphere Users' Guide V8.3.0 MPAS-A Technical Description Links https://mpas-dev.github.io/ /MPAS-Model/releases MPAS-Atmosphere Users' Gui

2025-06-05

MPAS

#NWP #WRF #MPAS #GFS #ERA5

$MPAS | WRF | cloud fraction | module_mp_thompson_cldfra3$

MPAS | WRF | cloud fraction | module_mp_thompson_cldfra3

Cloud fraction Cloud fraction is an important variable in numerical weather prediction (NWP) models that help to improve the accuracy of weather forecasts. It is a measure of the fraction of the sky t

2025-06-03

MPAS

#NWP #WRF #MPAS #cloud fraction #icloud

MPAS | WRF | CCPP Scientific Documentation

CCPP Scientific Documentation The scientific documentation for the parameterizations and suites available in the Common Community Physics Package (CCPP). The CCPP-Physics (available through h<ttps

2025-05-22

MPAS

#NWP #WRF #MPAS #CCPP

MPAS | WRF | MYNN

MYNN PBL scheme The Turbulent Kinetic Energy (TKE) budget equation in the Mellor-Yamada-Nakanishi-Niino (MYNN) PBL scheme of the WRF model and how they are outputted. The MYNN scheme is an improved ve

2025-05-22

MPAS

#NWP #WRF #MPAS #TKE #PBL #MYNN

MPAS | graph.info (Mesh Connectivity file)

2025-05-11

MPAS

#NWP #WRF #MPAS #mesh generation #Lloyd iteration #graph.info #MPAS-Tools #jigsaw

MPAS | mesh generation

2025-05-09

MPAS

#NWP #WRF #MPAS #mesh generation #Lloyd iteration #graph.info #MPAS-Tools #jigsaw