home.social

#nwp — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #nwp, aggregated by home.social.

  1. Ab sofort bis zum 25. Juni können Sie Kommentare und Anregungen zum Entwurf des Nationalen Wiederherstellungsplans (NWP) über die Online-Beteiligungsplattform des Bundesumweltministeriums abgeben: beteiligung.bundesumweltminist

    Foto: PeopleImages via Getty Image

    #Wiederherstellung #NWP #Bürgerbeteiligung

  2. Ab sofort bis zum 25. Juni können Sie Kommentare und Anregungen zum Entwurf des Nationalen Wiederherstellungsplans (NWP) über die Online-Beteiligungsplattform des Bundesumweltministeriums abgeben: beteiligung.bundesumweltminist

    Foto: PeopleImages via Getty Image

    #Wiederherstellung #NWP #Bürgerbeteiligung

  3. Ab sofort bis zum 25. Juni können Sie Kommentare und Anregungen zum Entwurf des Nationalen Wiederherstellungsplans (NWP) über die Online-Beteiligungsplattform des Bundesumweltministeriums abgeben: beteiligung.bundesumweltminist

    Foto: PeopleImages via Getty Image

    #Wiederherstellung #NWP #Bürgerbeteiligung

  4. Ab sofort bis zum 25. Juni können Sie Kommentare und Anregungen zum Entwurf des Nationalen Wiederherstellungsplans (NWP) über die Online-Beteiligungsplattform des Bundesumweltministeriums abgeben: beteiligung.bundesumweltminist

    Foto: PeopleImages via Getty Image

    #Wiederherstellung #NWP #Bürgerbeteiligung

  5. Ab sofort bis zum 25. Juni können Sie Kommentare und Anregungen zum Entwurf des Nationalen Wiederherstellungsplans (NWP) über die Online-Beteiligungsplattform des Bundesumweltministeriums abgeben: beteiligung.bundesumweltminist

    Foto: PeopleImages via Getty Image

    #Wiederherstellung #NWP #Bürgerbeteiligung

  6. The Bulletin of the American Meteorological Society has published a critique of ML by Leonard A Smith and Alan Thorpe. It compares the role and value of physics-based and statistical models in weather and climate forecasting, and tempers the ebulition around AI/ML.

    The article content is accessible to non-specialists in either ML or meteorology.

    #NWP #meteorology #AI #ML

    journals.ametsoc.org/view/jour

  7. The Bulletin of the American Meteorological Society has published a critique of ML by Leonard A Smith and Alan Thorpe. It compares the role and value of physics-based and statistical models in weather and climate forecasting, and tempers the ebulition around AI/ML.

    The article content is accessible to non-specialists in either ML or meteorology.

    #NWP #meteorology #AI #ML

    journals.ametsoc.org/view/jour

  8. The Bulletin of the American Meteorological Society has published a critique of ML by Leonard A Smith and Alan Thorpe. It compares the role and value of physics-based and statistical models in weather and climate forecasting, and tempers the ebulition around AI/ML.

    The article content is accessible to non-specialists in either ML or meteorology.

    #NWP #meteorology #AI #ML

    journals.ametsoc.org/view/jour

  9. The Bulletin of the American Meteorological Society has published a critique of ML by Leonard A Smith and Alan Thorpe. It compares the role and value of physics-based and statistical models in weather and climate forecasting, and tempers the ebulition around AI/ML.

    The article content is accessible to non-specialists in either ML or meteorology.

    #NWP #meteorology #AI #ML

    journals.ametsoc.org/view/jour

  10. The Bulletin of the American Meteorological Society has published a critique of ML by Leonard A Smith and Alan Thorpe. It compares the role and value of physics-based and statistical models in weather and climate forecasting, and tempers the ebulition around AI/ML.

    The article content is accessible to non-specialists in either ML or meteorology.

    #NWP #meteorology #AI #ML

    journals.ametsoc.org/view/jour

  11. Happy to report the earliest (and final) stream for #ORAS6 has entered production. Just in the spinup period now, but we have some #reanalysis data valid in 1944 already. Now just to be patient until this reaches 1993 where the already produced stream awaits...

    #ocean #seaice #nwp #era6

  12. Happy to report the earliest (and final) stream for #ORAS6 has entered production. Just in the spinup period now, but we have some #reanalysis data valid in 1944 already. Now just to be patient until this reaches 1993 where the already produced stream awaits...

    #ocean #seaice #nwp #era6

  13. Happy to report the earliest (and final) stream for #ORAS6 has entered production. Just in the spinup period now, but we have some #reanalysis data valid in 1944 already. Now just to be patient until this reaches 1993 where the already produced stream awaits...

    #ocean #seaice #nwp #era6

  14. Happy to report the earliest (and final) stream for #ORAS6 has entered production. Just in the spinup period now, but we have some #reanalysis data valid in 1944 already. Now just to be patient until this reaches 1993 where the already produced stream awaits...

    #ocean #seaice #nwp #era6

  15. Happy to report the earliest (and final) stream for #ORAS6 has entered production. Just in the spinup period now, but we have some #reanalysis data valid in 1944 already. Now just to be patient until this reaches 1993 where the already produced stream awaits...

    #ocean #seaice #nwp #era6

  16. BIG news from #ECMWF: a portable version of our global forecasting model is now open source! Development of #IFS started in 1987 and just a year before entering its 4th decade it is now available to all.

    This continues our journey that started a few years ago, when we made a first and growing number of several key model components available.

    See the news article for more details: ecmwf.int/en/about/media-centr

    Code repository: github.com/ecmwf-ifs/openifs

    #NWP #Weather #OpenSource

  17. BIG news from #ECMWF: a portable version of our global forecasting model is now open source! Development of #IFS started in 1987 and just a year before entering its 4th decade it is now available to all.

    This continues our journey that started a few years ago, when we made a first and growing number of several key model components available.

    See the news article for more details: ecmwf.int/en/about/media-centr

    Code repository: github.com/ecmwf-ifs/openifs

    #NWP #Weather #OpenSource

  18. BIG news from #ECMWF: a portable version of our global forecasting model is now open source! Development of #IFS started in 1987 and just a year before entering its 4th decade it is now available to all.

    This continues our journey that started a few years ago, when we made a first and growing number of several key model components available.

    See the news article for more details: ecmwf.int/en/about/media-centr

    Code repository: github.com/ecmwf-ifs/openifs

    #NWP #Weather #OpenSource

  19. BIG news from #ECMWF: a portable version of our global forecasting model is now open source! Development of #IFS started in 1987 and just a year before entering its 4th decade it is now available to all.

    This continues our journey that started a few years ago, when we made a first and growing number of several key model components available.

    See the news article for more details: ecmwf.int/en/about/media-centr

    Code repository: github.com/ecmwf-ifs/openifs

    #NWP #Weather #OpenSource

  20. BIG news from #ECMWF: a portable version of our global forecasting model is now open source! Development of #IFS started in 1987 and just a year before entering its 4th decade it is now available to all.

    This continues our journey that started a few years ago, when we made a first and growing number of several key model components available.

    See the news article for more details: ecmwf.int/en/about/media-centr

    Code repository: github.com/ecmwf-ifs/openifs

    #NWP #Weather #OpenSource

  21. ECMWF annual seminar 2026 is on "Advancing the assimilation of Earth system observations with new methodology and Machine Learning"

    Registration is open:
    events.ecmwf.int/event/513/ove

    #DataAssimilation #MachineLearning #NWP #WeatherForecasting

  22. ECMWF annual seminar 2026 is on "Advancing the assimilation of Earth system observations with new methodology and Machine Learning"

    Registration is open:
    events.ecmwf.int/event/513/ove

    #DataAssimilation #MachineLearning #NWP #WeatherForecasting

  23. ECMWF annual seminar 2026 is on "Advancing the assimilation of Earth system observations with new methodology and Machine Learning"

    Registration is open:
    events.ecmwf.int/event/513/ove

    #DataAssimilation #MachineLearning #NWP #WeatherForecasting

  24. ECMWF annual seminar 2026 is on "Advancing the assimilation of Earth system observations with new methodology and Machine Learning"

    Registration is open:
    events.ecmwf.int/event/513/ove

    #DataAssimilation #MachineLearning #NWP #WeatherForecasting

  25. ECMWF annual seminar 2026 is on "Advancing the assimilation of Earth system observations with new methodology and Machine Learning"

    Registration is open:
    events.ecmwf.int/event/513/ove

    #DataAssimilation #MachineLearning #NWP #WeatherForecasting

  26. @tinoeberl #ECMWF recognized “AI” #NWP is accurate for large scale ~2,000 km features only. Let’s put some science based constraints to the “AI” hype.

    ecmwf.int/en/newsletter/184/ne

  27. @tinoeberl #ECMWF recognized “AI” #NWP is accurate for large scale ~2,000 km features only. Let’s put some science based constraints to the “AI” hype.

    ecmwf.int/en/newsletter/184/ne

  28. @tinoeberl #ECMWF recognized “AI” #NWP is accurate for large scale ~2,000 km features only. Let’s put some science based constraints to the “AI” hype.

    ecmwf.int/en/newsletter/184/ne

  29. @tinoeberl recognized “AI” is accurate for large scale ~2,000 km features only. Let’s put some science based constraints to the “AI” hype.

    ecmwf.int/en/newsletter/184/ne

  30. @tinoeberl #ECMWF recognized “AI” #NWP is accurate for large scale ~2,000 km features only. Let’s put some science based constraints to the “AI” hype.

    ecmwf.int/en/newsletter/184/ne

  31. Je propose des cartes de divers paramètres clés du modèle numérique de prévisions #meteo (#PNT #NWP) GFS entraîné par apprentissage automatique (Machine Learning en anglais) via GraphCast de Google Inc.
    Les données binaires initiales sont fournies par la #NOAA
    Licence CC-BY 4.0.

    irizone.net/meteo/para/aigfs/1

  32. Je propose des cartes de divers paramètres clés du modèle numérique de prévisions #meteo (#PNT #NWP) GFS entraîné par apprentissage automatique (Machine Learning en anglais) via GraphCast de Google Inc.
    Les données binaires initiales sont fournies par la #NOAA
    Licence CC-BY 4.0.

    irizone.net/meteo/para/aigfs/1

  33. Je propose des cartes de divers paramètres clés du modèle numérique de prévisions #meteo (#PNT #NWP) GFS entraîné par apprentissage automatique (Machine Learning en anglais) via GraphCast de Google Inc.
    Les données binaires initiales sont fournies par la #NOAA
    Licence CC-BY 4.0.

    irizone.net/meteo/para/aigfs/1

  34. Je propose des cartes de divers paramètres clés du modèle numérique de prévisions #meteo (#PNT #NWP) GFS entraîné par apprentissage automatique (Machine Learning en anglais) via GraphCast de Google Inc.
    Les données binaires initiales sont fournies par la #NOAA
    Licence CC-BY 4.0.

    irizone.net/meteo/para/aigfs/1

  35. Je propose des cartes de divers paramètres clés du modèle numérique de prévisions #meteo (#PNT #NWP) GFS entraîné par apprentissage automatique (Machine Learning en anglais) via GraphCast de Google Inc.
    Les données binaires initiales sont fournies par la #NOAA
    Licence CC-BY 4.0.

    irizone.net/meteo/para/aigfs/1

  36. #EUMETSAT via #businesswire:
    "
    Revolutionärer Metop-SGA1 überträgt bereits Instrumentendaten
    "
    "Weniger als drei Wochen nach dem Start von Metop-Satellit A1 der zweiten Generation (Metop-SGA1) am 13. August überträgt der Satellit bereits Daten von zwei seiner sechs Instrumente."

    businesswire.com/news/home/202

    eumetsat.int/revolutionary-met

    2.9.2025

    #EO #Erdbeobachtung #ESA #Europa #NWP #MetOpSG #MetOpSGA1 #MWS #Raumfahrt #RO #Satelliten #SpaceFlight #Wettervorhersage #Wettersatellit

  37. #EUMETSAT via #businesswire:
    "
    Revolutionärer Metop-SGA1 überträgt bereits Instrumentendaten
    "
    "Weniger als drei Wochen nach dem Start von Metop-Satellit A1 der zweiten Generation (Metop-SGA1) am 13. August überträgt der Satellit bereits Daten von zwei seiner sechs Instrumente."

    businesswire.com/news/home/202

    eumetsat.int/revolutionary-met

    2.9.2025

    #EO #Erdbeobachtung #ESA #Europa #NWP #MetOpSG #MetOpSGA1 #MWS #Raumfahrt #RO #Satelliten #SpaceFlight #Wettervorhersage #Wettersatellit

  38. #EUMETSAT via #businesswire:
    "
    Revolutionärer Metop-SGA1 überträgt bereits Instrumentendaten
    "
    "Weniger als drei Wochen nach dem Start von Metop-Satellit A1 der zweiten Generation (Metop-SGA1) am 13. August überträgt der Satellit bereits Daten von zwei seiner sechs Instrumente."

    businesswire.com/news/home/202

    eumetsat.int/revolutionary-met

    2.9.2025

    #EO #Erdbeobachtung #ESA #Europa #NWP #MetOpSG #MetOpSGA1 #MWS #Raumfahrt #RO #Satelliten #SpaceFlight #Wettervorhersage #Wettersatellit

  39. #EUMETSAT via #businesswire:
    "
    Revolutionärer Metop-SGA1 überträgt bereits Instrumentendaten
    "
    "Weniger als drei Wochen nach dem Start von Metop-Satellit A1 der zweiten Generation (Metop-SGA1) am 13. August überträgt der Satellit bereits Daten von zwei seiner sechs Instrumente."

    businesswire.com/news/home/202

    eumetsat.int/revolutionary-met

    2.9.2025

    #EO #Erdbeobachtung #ESA #Europa #NWP #MetOpSG #MetOpSGA1 #MWS #Raumfahrt #RO #Satelliten #SpaceFlight #Wettervorhersage #Wettersatellit

  40. #EUMETSAT via #businesswire:
    "
    Revolutionärer Metop-SGA1 überträgt bereits Instrumentendaten
    "
    "Weniger als drei Wochen nach dem Start von Metop-Satellit A1 der zweiten Generation (Metop-SGA1) am 13. August überträgt der Satellit bereits Daten von zwei seiner sechs Instrumente."

    businesswire.com/news/home/202

    eumetsat.int/revolutionary-met

    2.9.2025

    #EO #Erdbeobachtung #ESA #Europa #NWP #MetOpSG #MetOpSGA1 #MWS #Raumfahrt #RO #Satelliten #SpaceFlight #Wettervorhersage #Wettersatellit

  41. Machine Learning is making a big impression in Numerical Weather Prediction these days. However, explicitly physics-based models still outperform AI models when it comes to extreme events. #meteorology #nwp

    arxiv.org/abs/2508.15724

    Hey sometimes my LinkedIn feed isn't all Facebook for office grunts.

  42. Machine Learning is making a big impression in Numerical Weather Prediction these days. However, explicitly physics-based models still outperform AI models when it comes to extreme events. #meteorology #nwp

    arxiv.org/abs/2508.15724

    Hey sometimes my LinkedIn feed isn't all Facebook for office grunts.

  43. Machine Learning is making a big impression in Numerical Weather Prediction these days. However, explicitly physics-based models still outperform AI models when it comes to extreme events. #meteorology #nwp

    arxiv.org/abs/2508.15724

    Hey sometimes my LinkedIn feed isn't all Facebook for office grunts.

  44. Basics of Numerical Weather Prediction (NWP):

    1. THE HORIZONTAL MOMENTUM EQUATION:
    \[
    \frac{d\mathbf{V}}{dt} + f\hat{k} \times \mathbf{V} = -\nabla \phi + \frac{\sigma}{p_s} \frac{\partial \phi}{\partial \sigma} \nabla p_s + \mathbf{F}
    \]

    2. THE CONTINUITY EQUATION:
    \[
    \frac{\partial p_s}{\partial t} + \nabla \cdot (p_s \mathbf{V}) + \frac{\partial}{\partial \sigma}(p_s \dot{\sigma}) = 0
    \]

    3. THE THERMODYNAMIC ENERGY EQUATION:
    \[
    \frac{1}{R} \frac{d}{dt} \left[ \sigma \frac{\partial \phi}{\partial \sigma} \right] + \frac{RT}{C_p p} \left[ p_s \dot{\sigma} + \sigma\dot{p_s} \right] = -Q
    \]

    4. HYDROSTATIC EQUATION:
    \[
    \frac{\partial \phi}{\partial \sigma} = -\frac{RT_v}{\sigma}
    \]

    5. SURFACE PRESSURE TENDENCY EQUATION:
    \[\displaystyle
    \frac{\partial p_s}{\partial t} = -\int_{0}^{1} \nabla\cdot (p_s \mathbf{V}) \, d\sigma
    \]

    6. MOISTURE EQUATION:
    \[\displaystyle
    \frac{\partial}{\partial t} (p_s q) + \nabla\cdot (p_s q \mathbf{V}) + \frac{\partial}{\partial \sigma} (p_s q \dot{\sigma}) = p_s S
    \]

    The six primary unknowns are: \(\mathbf{V}\) (horizontal wind velocity), \(p_s\) (surface pressure), \(T\) (temperature), \(q\) (specific humidity or moisture), \(\phi\) (geopotential), and \(\dot{\sigma}\) (sigma velocity or vertical velocity in \(\sigma\)-coordinates).

    #NWP #Weather #NumericalWeatherPrediction #Meteorology #Climate #ClimateScience #Earth #EarthScience #ClimateChange #ClimateSciences #Science #WeatherPrediction #Humidity #Moisture #Pressure #Velocity #SurfacePressure #HydrostaticEquation #WeatherPrediction #Ocean #Atmosphere #AOS #ClimateDynamics #WeatherDynamics #Geopotential #SigmaVelocity #VerticalVelocity #MoistureEquation #Thermodynamics #Dynamics #NavierStokes

  45. Basics of Numerical Weather Prediction (NWP):

    1. THE HORIZONTAL MOMENTUM EQUATION:
    \[
    \frac{d\mathbf{V}}{dt} + f\hat{k} \times \mathbf{V} = -\nabla \phi + \frac{\sigma}{p_s} \frac{\partial \phi}{\partial \sigma} \nabla p_s + \mathbf{F}
    \]

    2. THE CONTINUITY EQUATION:
    \[
    \frac{\partial p_s}{\partial t} + \nabla \cdot (p_s \mathbf{V}) + \frac{\partial}{\partial \sigma}(p_s \dot{\sigma}) = 0
    \]

    3. THE THERMODYNAMIC ENERGY EQUATION:
    \[
    \frac{1}{R} \frac{d}{dt} \left[ \sigma \frac{\partial \phi}{\partial \sigma} \right] + \frac{RT}{C_p p} \left[ p_s \dot{\sigma} + \sigma\dot{p_s} \right] = -Q
    \]

    4. HYDROSTATIC EQUATION:
    \[
    \frac{\partial \phi}{\partial \sigma} = -\frac{RT_v}{\sigma}
    \]

    5. SURFACE PRESSURE TENDENCY EQUATION:
    \[\displaystyle
    \frac{\partial p_s}{\partial t} = -\int_{0}^{1} \nabla\cdot (p_s \mathbf{V}) \, d\sigma
    \]

    6. MOISTURE EQUATION:
    \[\displaystyle
    \frac{\partial}{\partial t} (p_s q) + \nabla\cdot (p_s q \mathbf{V}) + \frac{\partial}{\partial \sigma} (p_s q \dot{\sigma}) = p_s S
    \]

    The six primary unknowns are: \(\mathbf{V}\) (horizontal wind velocity), \(p_s\) (surface pressure), \(T\) (temperature), \(q\) (specific humidity or moisture), \(\phi\) (geopotential), and \(\dot{\sigma}\) (sigma velocity or vertical velocity in \(\sigma\)-coordinates).

    #NWP #Weather #NumericalWeatherPrediction #Meteorology #Climate #ClimateScience #Earth #EarthScience #ClimateChange #ClimateSciences #Science #WeatherPrediction #Humidity #Moisture #Pressure #Velocity #SurfacePressure #HydrostaticEquation #WeatherPrediction #Ocean #Atmosphere #AOS #ClimateDynamics #WeatherDynamics #Geopotential #SigmaVelocity #VerticalVelocity #MoistureEquation #Thermodynamics #Dynamics #NavierStokes

  46. Basics of Numerical Weather Prediction (NWP):

    1. THE HORIZONTAL MOMENTUM EQUATION:
    \[
    \frac{d\mathbf{V}}{dt} + f\hat{k} \times \mathbf{V} = -\nabla \phi + \frac{\sigma}{p_s} \frac{\partial \phi}{\partial \sigma} \nabla p_s + \mathbf{F}
    \]

    2. THE CONTINUITY EQUATION:
    \[
    \frac{\partial p_s}{\partial t} + \nabla \cdot (p_s \mathbf{V}) + \frac{\partial}{\partial \sigma}(p_s \dot{\sigma}) = 0
    \]

    3. THE THERMODYNAMIC ENERGY EQUATION:
    \[
    \frac{1}{R} \frac{d}{dt} \left[ \sigma \frac{\partial \phi}{\partial \sigma} \right] + \frac{RT}{C_p p} \left[ p_s \dot{\sigma} + \sigma\dot{p_s} \right] = -Q
    \]

    4. HYDROSTATIC EQUATION:
    \[
    \frac{\partial \phi}{\partial \sigma} = -\frac{RT_v}{\sigma}
    \]

    5. SURFACE PRESSURE TENDENCY EQUATION:
    \[\displaystyle
    \frac{\partial p_s}{\partial t} = -\int_{0}^{1} \nabla\cdot (p_s \mathbf{V}) \, d\sigma
    \]

    6. MOISTURE EQUATION:
    \[\displaystyle
    \frac{\partial}{\partial t} (p_s q) + \nabla\cdot (p_s q \mathbf{V}) + \frac{\partial}{\partial \sigma} (p_s q \dot{\sigma}) = p_s S
    \]

    The six primary unknowns are: \(\mathbf{V}\) (horizontal wind velocity), \(p_s\) (surface pressure), \(T\) (temperature), \(q\) (specific humidity or moisture), \(\phi\) (geopotential), and \(\dot{\sigma}\) (sigma velocity or vertical velocity in \(\sigma\)-coordinates).

    #NWP #Weather #NumericalWeatherPrediction #Meteorology #Climate #ClimateScience #Earth #EarthScience #ClimateChange #ClimateSciences #Science #WeatherPrediction #Humidity #Moisture #Pressure #Velocity #SurfacePressure #HydrostaticEquation #WeatherPrediction #Ocean #Atmosphere #AOS #ClimateDynamics #WeatherDynamics #Geopotential #SigmaVelocity #VerticalVelocity #MoistureEquation #Thermodynamics #Dynamics #NavierStokes

  47. Basics of Numerical Weather Prediction (NWP):

    1. THE HORIZONTAL MOMENTUM EQUATION:
    \[
    \frac{d\mathbf{V}}{dt} + f\hat{k} \times \mathbf{V} = -\nabla \phi + \frac{\sigma}{p_s} \frac{\partial \phi}{\partial \sigma} \nabla p_s + \mathbf{F}
    \]

    2. THE CONTINUITY EQUATION:
    \[
    \frac{\partial p_s}{\partial t} + \nabla \cdot (p_s \mathbf{V}) + \frac{\partial}{\partial \sigma}(p_s \dot{\sigma}) = 0
    \]

    3. THE THERMODYNAMIC ENERGY EQUATION:
    \[
    \frac{1}{R} \frac{d}{dt} \left[ \sigma \frac{\partial \phi}{\partial \sigma} \right] + \frac{RT}{C_p p} \left[ p_s \dot{\sigma} + \sigma\dot{p_s} \right] = -Q
    \]

    4. HYDROSTATIC EQUATION:
    \[
    \frac{\partial \phi}{\partial \sigma} = -\frac{RT_v}{\sigma}
    \]

    5. SURFACE PRESSURE TENDENCY EQUATION:
    \[\displaystyle
    \frac{\partial p_s}{\partial t} = -\int_{0}^{1} \nabla\cdot (p_s \mathbf{V}) \, d\sigma
    \]

    6. MOISTURE EQUATION:
    \[\displaystyle
    \frac{\partial}{\partial t} (p_s q) + \nabla\cdot (p_s q \mathbf{V}) + \frac{\partial}{\partial \sigma} (p_s q \dot{\sigma}) = p_s S
    \]

    The six primary unknowns are: \(\mathbf{V}\) (horizontal wind velocity), \(p_s\) (surface pressure), \(T\) (temperature), \(q\) (specific humidity or moisture), \(\phi\) (geopotential), and \(\dot{\sigma}\) (sigma velocity or vertical velocity in \(\sigma\)-coordinates).

    #NWP #Weather #NumericalWeatherPrediction #Meteorology #Climate #ClimateScience #Earth #EarthScience #ClimateChange #ClimateSciences #Science #WeatherPrediction #Humidity #Moisture #Pressure #Velocity #SurfacePressure #HydrostaticEquation #WeatherPrediction #Ocean #Atmosphere #AOS #ClimateDynamics #WeatherDynamics #Geopotential #SigmaVelocity #VerticalVelocity #MoistureEquation #Thermodynamics #Dynamics #NavierStokes

  48. Basics of Numerical Weather Prediction (NWP):

    1. THE HORIZONTAL MOMENTUM EQUATION:
    \[
    \frac{d\mathbf{V}}{dt} + f\hat{k} \times \mathbf{V} = -\nabla \phi + \frac{\sigma}{p_s} \frac{\partial \phi}{\partial \sigma} \nabla p_s + \mathbf{F}
    \]

    2. THE CONTINUITY EQUATION:
    \[
    \frac{\partial p_s}{\partial t} + \nabla \cdot (p_s \mathbf{V}) + \frac{\partial}{\partial \sigma}(p_s \dot{\sigma}) = 0
    \]

    3. THE THERMODYNAMIC ENERGY EQUATION:
    \[
    \frac{1}{R} \frac{d}{dt} \left[ \sigma \frac{\partial \phi}{\partial \sigma} \right] + \frac{RT}{C_p p} \left[ p_s \dot{\sigma} + \sigma\dot{p_s} \right] = -Q
    \]

    4. HYDROSTATIC EQUATION:
    \[
    \frac{\partial \phi}{\partial \sigma} = -\frac{RT_v}{\sigma}
    \]

    5. SURFACE PRESSURE TENDENCY EQUATION:
    \[\displaystyle
    \frac{\partial p_s}{\partial t} = -\int_{0}^{1} \nabla\cdot (p_s \mathbf{V}) \, d\sigma
    \]

    6. MOISTURE EQUATION:
    \[\displaystyle
    \frac{\partial}{\partial t} (p_s q) + \nabla\cdot (p_s q \mathbf{V}) + \frac{\partial}{\partial \sigma} (p_s q \dot{\sigma}) = p_s S
    \]

    The six primary unknowns are: \(\mathbf{V}\) (horizontal wind velocity), \(p_s\) (surface pressure), \(T\) (temperature), \(q\) (specific humidity or moisture), \(\phi\) (geopotential), and \(\dot{\sigma}\) (sigma velocity or vertical velocity in \(\sigma\)-coordinates).

    #NWP #Weather #NumericalWeatherPrediction #Meteorology #Climate #ClimateScience #Earth #EarthScience #ClimateChange #ClimateSciences #Science #WeatherPrediction #Humidity #Moisture #Pressure #Velocity #SurfacePressure #HydrostaticEquation #WeatherPrediction #Ocean #Atmosphere #AOS #ClimateDynamics #WeatherDynamics #Geopotential #SigmaVelocity #VerticalVelocity #MoistureEquation #Thermodynamics #Dynamics #NavierStokes

  49. A largely cloud free satellite image of the central Northwest Passage shows that the prior melt ponds along the southern route have drained, and that melt ponds have now formed on the northern route through McClure Strait:

    GreatWhiteCon.info/2025/05/the

    #Arctic #SeaIce #NWP