BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Introduction to element-based computing\, finite volume and finite
element methods
DTSTART;VALUE=DATE-TIME:20210421T123000Z
DTEND;VALUE=DATE-TIME:20210421T133000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1643@events.ecmwf.int
DESCRIPTION:Speakers: Joanna Szmelter (Loughborough University)\nThe aim o
f two lectures is to introduce basis of finite volume and continuous finit
e element discretisations and relate them to corresponding data structures
and mesh generation techniques. The main focus will be on unstructured me
shes and their application to global and local atmospheric models. Flexibi
lity\, communication overheads\, memory requirements and user friendliness
of such meshes with be contrasted with those of structured meshes. The mo
st commonly used mesh generation techniques will be highlighted\, together
with mesh manipulation techniques employed in mesh adaption approaches an
d will be followed by a discussion of alternative geometrical representati
ons of orography. An example of unstructured meshes’ implementation to n
on-hydrostatic and hydrostatic atmospheric solvers will provide an illustr
ation of their potential and challenges.\nBy the end of the lecture you sh
ould be able to:\n• understand applicability\, advantages and disadvanta
ges of selected mesh generation techniques for a given type of application
.\n• appreciate importance of data structures in relation to atmospheric
models and mesh generation.\n• gain awareness of issues related to flex
ible mesh generation and adaption.\n\nhttps://events.ecmwf.int/event/206/c
ontributions/1643/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1643/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The spectral transform method
DTSTART;VALUE=DATE-TIME:20210420T124000Z
DTEND;VALUE=DATE-TIME:20210420T134000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1642@events.ecmwf.int
DESCRIPTION:Speakers: Michail Diamantakis (ECMWF)\nThe success of the spec
tral transform method in global NWP in comparison to alternative methods h
as been overwhelming\, with many operational forecast centres (including E
CMWF) having made the spectral transform their method of choice. The lectu
re will introduce the basic elements of the spectral transform\, explain w
hy it has been successful and describe recent developments such as the fas
t Legendre transform.\n\nBy the end of the session you should be able to:\
n\n• explain what the spectral transform method is\, how it is applied\,
and describe the latest developments at ECMWF\n• give reasons why it
is successful for global NWP and climate\n• identify potential disadva
ntages of the method\n\nhttps://events.ecmwf.int/event/206/contributions/1
642/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1642/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Reduced precision computing for Earth System modelling
DTSTART;VALUE=DATE-TIME:20210421T093000Z
DTEND;VALUE=DATE-TIME:20210421T103000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1641@events.ecmwf.int
DESCRIPTION:Speakers: Sam Hatfield (ECMWF)\nThe aim of this session is to
understand how numerical precision can be traded against computational per
formance in Earth System modelling. It will be discussed how a reduction i
n numerical precision will influence model quality and how the minimal lev
el of precision that will still allow simulations at high accuracy can be
identified. We will give an overview about existing hardware options to ad
just numerical precision to the need of the application.\n\nBy the end of
this session you should be able to\n\n• describe how rounding errors wil
l impact model simulations that show chaotic dynamics\n• describe the co
nnection between numerical precision\, computational performance and predi
ctability\n• recall how a trade-off between precision and performance ca
n be realised in Earth System modelling today and in the future\n\nhttps:/
/events.ecmwf.int/event/206/contributions/1641/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1641/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discontinuous higher order discretization methods (1)
DTSTART;VALUE=DATE-TIME:20210422T103500Z
DTEND;VALUE=DATE-TIME:20210422T113500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1640@events.ecmwf.int
DESCRIPTION:Speakers: Willem Deconinck (ECMWF)\nhttps://events.ecmwf.int/e
vent/206/contributions/1640/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1640/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Introduction
DTSTART;VALUE=DATE-TIME:20210419T085000Z
DTEND;VALUE=DATE-TIME:20210419T091500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1638@events.ecmwf.int
DESCRIPTION:Speakers: Sarah Keeley (ECMWF)\nhttps://events.ecmwf.int/event
/206/contributions/1638/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1638/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Numerics and Discretization in NWP today
DTSTART;VALUE=DATE-TIME:20210419T093000Z
DTEND;VALUE=DATE-TIME:20210419T103000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1637@events.ecmwf.int
DESCRIPTION:Speakers: Nils Wedi (ECMWF)\nUsing the 30-year history of ECMW
F's Integrated Forecasting System (IFS) as an example\, the lecture is an
introduction to the development and current state-of-the-art of global num
erical weather prediction (NWP)\, as well as to the challenges faced in th
e future. It is intended to provide\nan overview and context for the topic
s covered in more detail during the course.\n\nBy the end of the session y
ou should be able to:\n\n• describe the development of global NWP\, the
current-state-of-the-art\, and future challenges\n• identify relevant ar
eas of research in numerical methods for Earth-System Modelling\n• put i
nto context every subsequent lecture and its purpose\n\nhttps://events.ecm
wf.int/event/206/contributions/1637/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1637/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hydrostatic and non-hydrostatic dynamics\, resolved and permitted
convection
DTSTART;VALUE=DATE-TIME:20210419T103500Z
DTEND;VALUE=DATE-TIME:20210419T113500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1636@events.ecmwf.int
DESCRIPTION:Speakers: Inna Polichtchouk ()\nDuring this presentation\, we
will discuss two of the questions faced by numerical weather prediction sc
ientists as forecast models reach horizontal resolutions of 6 to 2 km:\n\n
• Do we need to abandon the primitive equations for a non-hydrostatic sy
stem of equations?\n• Do we still need a deep convection parametrisation
?\n• and we will show what answers to these questions are given by very
high resolution simulations of the IFS.\n\nBy the end of the presentation\
, you should be able to:\n\n• discuss the limits of the hydrostatic appr
oximation for numerical weather prediction\n• explain the dilemma of par
ametrizing deep convection versus permitting explicit deep convection at r
esolution in the grey zone of convection\n\nhttps://events.ecmwf.int/event
/206/contributions/1636/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1636/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vertical discretisation
DTSTART;VALUE=DATE-TIME:20210420T081500Z
DTEND;VALUE=DATE-TIME:20210420T091500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1635@events.ecmwf.int
DESCRIPTION:Speakers: Christian Kuehnlein (ECMWF)\nThe goal of this sessio
n is to provide an overview of the use of generalised curvilinear coordina
tes in atmospheric numerical models.\n\nBy the end of the session you shou
ld be able to:\n\n• describe some important aspects of the formulation a
nd implementation of the governing equations in generalised coordinates\n
• describe various vertical coordinates employed in atmospheric models\n
• indicate the use of generalised coordinates to employ moving mesh adap
tivity\n\nhttps://events.ecmwf.int/event/206/contributions/1635/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1635/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Introduction to semi-implicit integrations of non-hydrostatic PDEs
of atmospheric dynamics
DTSTART;VALUE=DATE-TIME:20210419T123000Z
DTEND;VALUE=DATE-TIME:20210419T133000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1634@events.ecmwf.int
DESCRIPTION:Speakers: Piotr Smolarkiewicz (National Center for Atmospheric
Research)\nThe aim of this set of lectures is to systematically build the
oretical foundations for Numerical Weather Prediction at nonhydrostatic re
solutions. In the first part of the lecture\, we will discuss a suite of a
ll-scale nonhydrostatic PDEs\, including the anelastic\, the pseudo-incomp
ressible and the fully compressible Euler equations of atmospheric dynamic
s. First\, we will introduce the three sets of nonhydrostatic governing eq
uations written in a physically intuitive Cartesian vector form\, in abstr
action from the model geometry and the coordinate frame adopted. Then\, we
will combine the three sets into a single set recast in a form of the con
servation laws consistent with the problem geometry and the unified soluti
on procedure. In the second part of the lecture\, we will build and docume
nt the common numerical algorithm for integrating the generalised set of t
he governing PDEs put forward in the first part of the lecture. Then\, we
will compare soundproof and compressible solutions and demonstrate the eff
icacy of this unified numerical framework for two idealised flow problems
relevant to weather and climate.\nBy the end of the lectures you should be
able to:\n• explain the form\, properties and role of alternative syste
ms of nonhydrostatic PDEs for all scale atmospheric dynamics\;\n• explai
n the importance and key aspects of continuous mappings employed in all-sc
ale atmospheric models\;\n• explain the difference between the explicit
and semi-implicit algorithms for integrating nonhydrostatic PDEs\, the imp
ortance of consistent numerical approximations\, and the fundamental role
of transport and elliptic solvers\n\nhttps://events.ecmwf.int/event/206/co
ntributions/1634/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1634/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Algorithms for semi-implicit integrations of non-hydrostatic PDEs
of atmospheric dynamics (1)
DTSTART;VALUE=DATE-TIME:20210420T113500Z
DTEND;VALUE=DATE-TIME:20210420T123500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1633@events.ecmwf.int
DESCRIPTION:Speakers: Piotr Smolarkiewicz (National Center for Atmospheric
Research)\nThe aim of this set of lectures is to systematically build the
oretical foundations for Numerical Weather Prediction at nonhydrostatic re
solutions. In the first part of the lecture\, we will discuss a suite of a
ll-scale nonhydrostatic PDEs\, including the anelastic\, the pseudo-incomp
ressible and the fully compressible Euler equations of atmospheric dynamic
s. First\, we will introduce the three sets of nonhydrostatic governing eq
uations written in a physically intuitive Cartesian vector form\, in abstr
action from the model geometry and the coordinate frame adopted. Then\, we
will combine the three sets into a single set recast in a form of the con
servation laws consistent with the problem geometry and the unified soluti
on procedure. In the second part of the lecture\, we will build and docume
nt the common numerical algorithm for integrating the generalised set of t
he governing PDEs put forward in the first part of the lecture. Then\, we
will compare soundproof and compressible solutions and demonstrate the eff
icacy of this unified numerical framework for two idealised flow problems
relevant to weather and climate.\nBy the end of the lectures you should be
able to:\n• explain the form\, properties and role of alternative syste
ms of nonhydrostatic PDEs for all scale atmospheric dynamics\;\n• explai
n the importance and key aspects of continuous mappings employed in all-sc
ale atmospheric models\;\n• explain the difference between the explicit
and semi-implicit algorithms for integrating nonhydrostatic PDEs\, the imp
ortance of consistent numerical approximations\, and the fundamental role
of transport and elliptic solvers.\n\nhttps://events.ecmwf.int/event/206/c
ontributions/1633/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1633/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mesh generation
DTSTART;VALUE=DATE-TIME:20210421T134500Z
DTEND;VALUE=DATE-TIME:20210421T144500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1632@events.ecmwf.int
DESCRIPTION:Speakers: Joanna Szmelter (Loughborough University)\nThe aim o
f two lectures is to introduce basis of finite volume and continuous finit
e element discretisations and relate them to corresponding data structures
and mesh generation techniques. The main focus will be on unstructured me
shes and their application to global and local atmospheric models. Flexibi
lity\, communication overheads\, memory requirements and user friendliness
of such meshes with be contrasted with those of structured meshes. The mo
st commonly used mesh generation techniques will be highlighted\, together
with mesh manipulation techniques employed in mesh adaption approaches an
d will be followed by a discussion of alternative geometrical representati
ons of orography. An example of unstructured meshes’ implementation to n
on-hydrostatic and hydrostatic atmospheric solvers will provide an illustr
ation of their potential and challenges.\nBy the end of the lecture you sh
ould be able to:\n• understand applicability\, advantages and disadvanta
ges of selected mesh generation techniques for a given type of application
.\n• appreciate importance of data structures in relation to atmospheric
models and mesh generation.\n• gain awareness of issues related to flex
ible mesh generation and adaption.\n\nhttps://events.ecmwf.int/event/206/c
ontributions/1632/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1632/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The semi-Lagrangian\, semi-implicit technique of the ECMWF model
DTSTART;VALUE=DATE-TIME:20210421T081500Z
DTEND;VALUE=DATE-TIME:20210421T091500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1631@events.ecmwf.int
DESCRIPTION:Speakers: Michail Diamantakis (ECMWF)\nThe aim of this session
is to describe the numerical technique that is used for integrating the g
overning equations of the ECMWF Numerical Weather Prediction model IFS. We
will present an overview of the semi-Lagrangian method and how can be com
bined with semi-implicit time-stepping to provide a stable and accurate fo
rmulation for the IFS.\n\nBy the end of this session you should be able to
:\n\n• describe the fundamental concepts of semi-Lagrangian advection sc
hemes\, their strengths and weaknesses\n• describe semi-implicit time-st
epping and its use in IFS \n• explain the important role these two te
chniques play for the efficiency of the current IFS system\n• understan
d the impact that future super-computing architectures may have in the app
licability of the semi-Lagrangian technique in high resolution non-hydros
tatic global NWP systems.\n\nhttps://events.ecmwf.int/event/206/contributi
ons/1631/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1631/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eulerian time-stepping schemes for NWP & climate
DTSTART;VALUE=DATE-TIME:20210421T103500Z
DTEND;VALUE=DATE-TIME:20210421T113500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1630@events.ecmwf.int
DESCRIPTION:Speakers: Michail Diamantakis (ECMWF)\nThe aim of this session
is to describe Eulerian rather than Lagrangian type numerical techniques
for integrating the equation sets encountered in NWP models. We will prese
nt an overview of different time-stepping techniques and discuss the advan
tages and disadvantages of each approach. \n\nBy the end of the session yo
u should be able to:\n\n• obtain a good understanding of the minimum the
oretical properties required by time-stepping schemes \n• describe diffe
rences\, strengths-weaknesses of different time-stepping approaches such a
s split-explicit time-stepping\, Runge-Kutta time-stepping\n• describe t
he basic features of different time-stepping schemes used in other weather
forecasting models such as WRF\, ICON\n\nhttps://events.ecmwf.int/event/2
06/contributions/1630/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1630/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Algorithms for semi-implicit integrations of non-hydrostatic PDEs
of atmospheric dynamics (2))
DTSTART;VALUE=DATE-TIME:20210422T081500Z
DTEND;VALUE=DATE-TIME:20210422T091500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1629@events.ecmwf.int
DESCRIPTION:Speakers: Piotr Smolarkiewicz (National Center for Atmospheric
Research)\nThe aim of this set of lectures is to systematically build the
oretical foundations for Numerical Weather Prediction at nonhydrostatic re
solutions. In the first part of the lecture\, we will discuss a suite of a
ll-scale nonhydrostatic PDEs\, including the anelastic\, the pseudo-incomp
ressible and the fully compressible Euler equations of atmospheric dynamic
s. First\, we will introduce the three sets of nonhydrostatic governing eq
uations written in a physically intuitive Cartesian vector form\, in abstr
action from the model geometry and the coordinate frame adopted. Then\, we
will combine the three sets into a single set recast in a form of the con
servation laws consistent with the problem geometry and the unified soluti
on procedure. In the second part of the lecture\, we will build and docume
nt the common numerical algorithm for integrating the generalised set of t
he governing PDEs put forward in the first part of the lecture. Then\, we
will compare soundproof and compressible solutions and demonstrate the eff
icacy of this unified numerical framework for two idealised flow problems
relevant to weather and climate.\nBy the end of the lectures you should be
able to:\n• explain the form\, properties and role of alternative syste
ms of nonhydrostatic PDEs for all scale atmospheric dynamics\;\n• explai
n the importance and key aspects of continuous mappings employed in all-sc
ale atmospheric models\;\n• explain the difference between the explicit
and semi-implicit algorithms for integrating nonhydrostatic PDEs\, the imp
ortance of consistent numerical approximations\, and the fundamental role
of transport and elliptic solvers.\n\nhttps://events.ecmwf.int/event/206/c
ontributions/1629/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1629/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discontinuous higher order discretization methods (2)
DTSTART;VALUE=DATE-TIME:20210422T123000Z
DTEND;VALUE=DATE-TIME:20210422T133000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1628@events.ecmwf.int
DESCRIPTION:Speakers: Willem Deconinck (ECMWF)\nThe aim of this session is
to learn about recent developments in discontinuous higher order spatial
discretization methods\, such as the Discontinuous Galerkin method (DG)\,
and the Spectral Difference method (SD). These methods are of interest bec
ause they can be used on unstructured meshes and facilitate optimal parall
el efficiency. We will present an overview of higher order grid point meth
ods for discretizing partial differential equations (PDE's) with compact s
tencil support\, and illustrate a practical implementation.\nBy the end of
the session you should be able to:\n• ell what are the advantages offer
ed by discontinuous higher order methods\n• describe how to solve PDE's
with discontinuous methods\n• identify the key elements that contribute
to a PDE solver\n\nhttps://events.ecmwf.int/event/206/contributions/1628/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1628/
END:VEVENT
BEGIN:VEVENT
SUMMARY:AI and machine learning
DTSTART;VALUE=DATE-TIME:20210422T134500Z
DTEND;VALUE=DATE-TIME:20210422T144500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1626@events.ecmwf.int
DESCRIPTION:Speakers: Peter Dueben (ECMWF)\nhttps://events.ecmwf.int/event
/206/contributions/1626/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1626/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Massively Parallel Computing for NWP & Climate
DTSTART;VALUE=DATE-TIME:20210422T093000Z
DTEND;VALUE=DATE-TIME:20210422T103000Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1624@events.ecmwf.int
DESCRIPTION:Speakers: Ioan Hadade (ECMWF)\nhttps://events.ecmwf.int/event/
206/contributions/1624/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1624/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mesh adaptivity using continuous mappings
DTSTART;VALUE=DATE-TIME:20210420T093000Z
DTEND;VALUE=DATE-TIME:20210420T104500Z
DTSTAMP;VALUE=DATE-TIME:20210126T122409Z
UID:indico-contribution-206-1623@events.ecmwf.int
DESCRIPTION:Speakers: Christian Kuehnlein (ECMWF)\nThe goal of this sessio
n is to provide an overview of the use of generalised curvilinear coordina
tes in atmospheric numerical models.\n\nBy the end of the session you shou
ld be able to:\n\n• describe some important aspects of the formulation a
nd implementation of the governing equations in generalised coordinates\n
• describe various vertical coordinates employed in atmospheric models\n
• indicate the use of generalised coordinates to employ moving mesh adap
tivity\n\nhttps://events.ecmwf.int/event/206/contributions/1623/
LOCATION:
URL:https://events.ecmwf.int/event/206/contributions/1623/
END:VEVENT
END:VCALENDAR