The GGOS Bureau of Products and Standards

2020 ◽  
Author(s):  
Detlef Angermann ◽  
Thomas Gruber ◽  
Michael Gerstl ◽  
Urs Hugentobler ◽  
Laura Sanchez ◽  
...  
Keyword(s):  
Organizational Structure ◽  
Gravity Field ◽  
Working Group ◽  
System Modeling ◽  
Earth System ◽  
Earth System Modeling ◽  
The Earth ◽  
External Stakeholders ◽  
Definition Of

<p>The Bureau of Products and Standards (BPS) supports GGOS in its goal to obtain consistent products describing the geometry, rotation and gravity field of the Earth. A key objective of the BPS is to keep track of adopted geodetic standards and conventions across all IAG components as a fundamental basis for the generation of consistent geometric and gravimetric products. This poster gives an overview about the organizational structure, the objectives and activities of the BPS. In its present structure, the two Committees “Earth System Modeling” and “Essential Geodetic Variables” as well as the newly established Working Group “Towards a consistent set of parameters for the definition of a new GRS” are associated to the BPS. Recently the updated 2<sup>nd</sup> version of the BPS inventory on standards and conventions used for the generation of IAG products has been compiled. Other activities of the Bureau include the integration of geometric and gravimetric observations towards the development of integrated products (e.g., GGRF, IHRF, atmosphere products) in cooperation with the IAG Services and the GGOS Focus Areas, the contribution to the re-writing of the IERS Conventions as Chapter Expert for Chapter 1 “General definitions and numerical standards”, the interaction with external stakeholders regarding standards and conventions (e.g., ISO, IAU, BIPM, CODATA) as well as contributions to the Working Group “Data Sharing and Development of Geodetic Standards” within the UN GGIM Subcommittee on Geodesy.</p>

The GGOS Bureau of Products and Standards

2021 ◽  
Author(s):  
Detlef Angermann ◽  
Thomas Gruber ◽  
Michael Gerstl ◽  
Robert Heinkelmann ◽  
Urs Hugentobler ◽  
...  
Keyword(s):  
Data Sharing ◽  
Mass Distribution ◽  
Working Group ◽  
System Modeling ◽  
Earth System ◽  
Earth System Modeling ◽  
The Earth ◽  
External Stakeholders ◽  
Definition Of

<p>This presentation gives a summary of the role and the activities of the Bureau of Products and Standards (BPS) to support IAG’s Global Geodetic Observing System (GGOS) in its goal to provide observations and consistent geodetic products needed to monitor, map and understand changes in the Earth’s shape, rotation and mass distribution. In its present structure, the two Committees “Earth System Modeling” and “Essential Geodetic Variables” as well as the Working Group “Towards a consistent set of parameters for the definition of a new GRS” are associated with the BPS. A key objective of the BPS is to keep track and to foster homogenization of adopted geodetic standards and conventions across all IAG components as a fundamental basis for the generation of consistent geometric and gravimetric products. Towards this aim, an updated 2<sup>nd</sup> version of the BPS inventory of standards and conventions used for the generation of IAG products has been published in the Geodesist’s Handbook 2020. In the framework of the renewing of the GGOS website, the BPS supports the GGOS Coordinating Office in particular regarding the representation of geodetic products. Furthermore, the BPS contributes to the rewriting of the IERS Conventions as Chapter Expert for Chapter 1 “General definitions and numerical standards” and interacts with external stakeholders regarding standards and conventions, such as ISO, IAU, BIPM, CODATA and the UN GGIM Subcommittee on Geodesy, including its Working Group “Data Sharing and Development of Geodetic Standards”.</p>

scholarly journals On the mechanical vibrator-earth contact geometry and its dynamics

Geophysics ◽  
2016 ◽  
Vol 81 (3) ◽  
pp. P23-P31 ◽  
Author(s):  
Rik Noorlandt ◽  
Guy Drijkoningen
Keyword(s):  
Field Experiment ◽  
System Modeling ◽  
Base Plate ◽  
Drive Level ◽  
Earth System ◽  
Mechanical Modeling ◽  
Earth System Modeling ◽  
Resonance Behavior ◽  
The Earth ◽  
Contact Mechanical

The geometry of the contact between a vibrator and the earth underneath influences the dynamics of the vibrator. Although a vibrator might appear to be well-coupled with the earth on a macroscale, perfect coupling certainly does not occur on the microscale. With the aid of contact mechanical modeling and concepts, it can be shown that this lack of contact at the microscale, or rather the change thereof during a sweep, can have a significant effect on the dynamics of the vibrator-earth system. Modeling of such changing contact predicts that the dynamic behavior varies considerably with the vibrator drive level. The most significant effect predicted by the model is a decrease in the base-plate resonance frequency with an increasing drive level. Extensive drive-level tests carried out in a field experiment confirm this change of resonance behavior with drive level.

scholarly journals Toward Better Understanding of the Community Land Model within the Earth System Modeling Framework

2014 ◽  
Vol 29 ◽  
pp. 1515-1524 ◽  
Author(s):  
Dali Wang ◽  
Joseph Schuchart ◽  
Tomislav Janjusic ◽  
Frank Winkler ◽  
Yang Xu ◽  
...  
Keyword(s):  
System Modeling ◽  
Earth System ◽  
Modeling Framework ◽  
Earth System Modeling ◽  
Community Land Model ◽  
The Earth

scholarly journals JUWELS: Modular Tier-0/1 Supercomputer at Jülich Supercomputing Centre

2019 ◽  
Vol 5 ◽  
Author(s):  
Supercomputing Support
Keyword(s):  
System Modeling ◽  
Earth System ◽  
Earth System Modeling ◽  
The Earth ◽  
Intel Xeon

JUWELS is a multi-petaflop modular supercomputer operated by Jülich Supercomputing Centre at Forschungszentrum Jülich as a European and national supercomputing resource for the Gauss Centre for Supercomputing. In addition, JUWELS serves the Earth system modeling community within the Helmholtz Association. The first module deployed in 2018, is a Cluster module based on the BullSequana X1000 architecture with Intel Xeon Skylake-SP processors and Mellanox EDR InfiniBand. An extension by a second Booster module is scheduled for deployment in 2020.

scholarly journals Steering the Climate System: Using Inertia to Lower the Cost of Policy: Comment

2020 ◽  
Vol 110 (4) ◽  
pp. 1231-1237 ◽  
Author(s):  
Linus Mattauch ◽  
H. Damon Matthews ◽  
Richard Millar ◽  
Armon Rezai ◽  
Susan Solomon ◽  
...  
Keyword(s):  
Interest Rate ◽  
Carbon Emissions ◽  
System Modeling ◽  
Carbon Price ◽  
Earth System ◽  
Earth System Modeling ◽  
The Earth ◽  
The Interest Rate ◽  
The Cost ◽  
Earth System Models

Lemoine and Rudik (2017) argues that it is efficient to delay reducing carbon emissions, due to supposed inertia in the climate system’s response to emissions. This conclusion rests upon misunderstanding the relevant earth system modeling: there is no substantial lag between CO2 emissions and warming. Applying a representation of the earth system that captures the range of responses seen in complex earth system models invalidates the original article’s implications for climate policy. The least-cost policy path that limits warming to 2°C implies that the carbon price starts high and increases at the interest rate. It cannot rely on climate inertia to delay reducing and allow greater cumulative emissions. (JEL H23, Q54, Q58)

The architecture of the earth system modeling framework

2004 ◽  
Vol 6 (1) ◽  
pp. 18-28 ◽  
Author(s):  
C. Hill ◽  
C. DeLuca ◽  
Balaji ◽  
M. Suarez ◽  
A. Da Silva
Keyword(s):  
System Modeling ◽  
Earth System ◽  
Modeling Framework ◽  
Earth System Modeling ◽  
The Earth

scholarly journals JUWELS Cluster and Booster: Exascale Pathfinder with Modular Supercomputing Architecture at Juelich Supercomputing Centre

2021 ◽  
Vol 7 ◽  
Author(s):  
Damian Alvarez
Keyword(s):  
System Modeling ◽  
Earth System ◽  
Earth System Modeling ◽  
2Nd Generation ◽  
The Earth ◽  
Intel Xeon

JUWELS is a multi-petaflop modular supercomputer operated by Juelich Supercomputing Centre at Forschungszentrum Juelich as a European and national supercomputing resource for the Gauss Centre for Supercomputing. In addition, JUWELS serves the Earth system modeling community and the AI community within the Helmholtz Association as well. JUWELS currently consists of two modules. The first module deployed in 2018 is the so-called Cluster module. The Cluster is a BullSequana X1000 system with Intel Xeon Skylake-SP processors and Mellanox EDR InfiniBand. The second module deployed in 2020 is the so-called Booster module. The Booster is a BullSequana XH2000 system with 2nd generation AMD EPYC processors, NVIDIA Ampere GPUs and NVIDIA/Mellanox HDR Infiniband. This paper describes in detail the architecture of the system from a users perspective, and additionally provides further insights into the administrative infrastructure used to operate the supercomputer.

Sign in / Sign up

Export Citation Format

Share Document