CTBTO recruiting Specialist for Atmospheric Transport Modelling Enhancement
Vienna, Austria, 12 December 2013
Contract duration: a fixed-term contract for a period not to exceed three years.
The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization with its Headquarters in Vienna is the international organization setting up the global verification system foreseen under the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which is the Treaty banning any nuclear-weapon-test explosion or any other nuclear explosion. The Treaty provides for a global verification regime, including a network of 321 stations worldwide, a communications system, an international data centre and on-site inspections to monitor compliance.
The Atmospheric Transport Modelling (ATM) operational system deployed and used at CTBTO produces Source Receptor Sensitivity (SRS) fields, which specify the location of the air masses prior to their arrival at any radionuclide station of the International Monitoring System (IMS) network.
Consequently, the ATM computations support the radionuclide technology by providing a link between radionuclide detections and the regions of their possible source. Further, in a data fusion process, the ATM computations link the radionuclide detections with those waveform events which fall within the regions of possible source of radionuclides. Recently, ATM has also demonstrated its considerable usefulness for civil applications.
At present, the atmospheric transport modelling operational system is based on a Lagrangian Particle Dispersion Model, FLEXPART, driven by the global meteorological fields provided by the European Centre for Medium-Ranged Weather Forecasts (ECMWF) and the US National Centres for Environmental Prediction (NCEP) at a fairly low resolution. An enhancement of the ATM capacity supporting the aforementioned tasks requires investment in computational resources and human expert knowledge.
Duties and accountabilities
Under the supervision of the Atmospheric Sciences Officers, Office of the Director, IDC, to:
Analysis of the needs in terms of ATM to support civil applications based on interaction with experts and the assessment of the CTBTO’s role in the Inter-Agency Committee on Radiological and Nuclear Emergencies (IACRNE);
Investigation of the means of enhancement of ATM capacities to support CTBT monitoring;
Identification of enhancements which reinforce both the civil and CTBT-related applications of the ATM system;
Interaction with the scientific community in order to specify solutions to meet the identified requirements for enhancement;
Acquisition of high-resolution meteorological fields by developing Commission’s capabilities in mesoscale meteorological modelling;
Implementation of the necessary interfaces between the high-resolution meteorological fields and atmospheric dispersion models;
Improvement of the radionuclide-relevant modules of atmospheric dispersion models to enhance description of the physical processes of turbulent transport and deposition, and to reflect physical-chemical conversion of the modelled species;
Participation in training courses, both in-house and external, as necessary;
Travel to and participation in CTBT-relevant conferences and presentation of the results;
Preparation of monthly written progress reports;
Performance of other duties as assigned.
Deadline: 20 December 2013
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