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NWP | ECMWF（歐洲中期天氣預報中心）的IFS（Integrated Forecasting System）購買數據實際成本

NWP | ECMWF | IFS | Open data IFS 歐洲中期天氣預報中心（ECMWF）的IFS（Integrated Forecasting System）數據，目前主要採用開放數據政策，數據本身基本免費，但根據使用方式和交付需求，可能產生服務費（分發/傳輸成本）。購買 ECMWF（歐洲中期天氣預報中心）IFS（整合預測系統）數據的成本在 2025 年 10 月 1 日之後發生

2026-04-09

NWP

#WRF #MPAS #NWP #GFS #FNL #ERA5 #IFS #CMA #BUFR

AI | ollama + OpenClaw + gemma4

Build Reinstall Ubuntu on an older computer. 1234567sudo apt update && sudo apt install -y build-essential python3 make cmakesudo apt install openssh-serverip addrsudo systemctl status sshls

2026-04-04

#AI #ollama #OpenClaw #gemma4

CFD | Gmsh | meshing

Gmsh Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Its design goal is to provide a fast, light and user-friendly meshing tool with parametric i

2026-04-01

CFD

#HPC #OpenFOAM #Gmsh #meshing

Linux | Python Profiler

Whether you're trying to figure out why your script is crawling or you just want to optimize a specific function, Python has some built-in heavy hitters to help you find those bottlenecks. Here is the

2026-03-23

Linux

#python #Profiler #cProfile #snakeviz #memory_profiler

NWP | BUFR data | GFS - Binary Universal Form for the Representation of meteorological data

Binary Universal Form for the Representation of meteorological data The Global Forecast System (GFS) utilizes Binary Universal Form for the Representation of meteorological data (BUFR), a World Meteor

2026-02-27

NWP

#WRF #MPAS #NWP #GFS #FNL #ERA5 #IFS #CMA #BUFR

CFD | Direct Numerical Simulation, DNS

在計算流體力學（CFD）的最高境界——直接數值模擬 (Direct Numerical Simulation, DNS) 中，耗散率（Dissipation Rate）是衡量能量如何從大尺度渦流傳遞至微小尺度並最終轉化為熱能的核心物理量。 Direct Numerical Simulation 1. Incompressible Flow 物理表達式 (不可壓縮流)在不可壓縮流（Incompres

2026-02-26

CFD

#HPC #OpenFOAM #LES #RANS #URANS #DES #DNS #Dissipation Rate

高空西風帶與三圈環流 | Three-cell circulation and upper-level westerly winds

全球大氣環流現象一個非常經典且有趣的全球大氣環流現象：無論是在北半球還是南半球，中高緯度的高空（對流層中上部到平流層）基本上都被強勁的西風所統治。這聽起來可能有點反直覺，畢竟地面上有信風（東風）、中緯度西風和極地東風，但到了高空，情況就變得出奇地統一。以下是造成這種「全球高空皆西風」局面的核心邏輯： 1. 根本驅動力：南北溫差太陽輻射在赤道最強，極地最弱。這導致赤道大氣的溫度遠高於極地

2026-02-23

Meteorology

#WRF #MPAS #NWP

MPAS | MPAS-JEDI V3.0.2

MPAS | MPAS-JEDI MPAS | Joint MPAS/WRF Users Workshop 2025 | MPASv8.3.0 obs2ioda https://github.com/jamiebresch/obs2ioda https://github.com/jamiebresch/obs2ioda/blob/main/obs2ioda-v2/README.md Co

2026-02-13

MPAS

#MPAS #DA #MPAS-JEDI

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

#WRF #MPAS #NWP #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

#WRF #MPAS #NWP #Tangential Velocity