Atmospheric transport modelling in support of CTBT verification—overview and basic concepts

Abstract Under the provisions of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), a global monitoring system comprising different verification technologies is currently being set up. The network will include 80 radionuclide (RN) stations distributed all over the globe that measure treaty-relevant radioactive species. While the seismic subsystem cannot distinguish between chemical and nuclear explosions, RN monitoring would provide the “smoking gun” of a possible treaty violation. Atmospheric transport modelling (ATM) will be an integral part of CTBT verification, since it provides a geo-temporal location capability for the RN technology. In this paper, the basic concept for the future ATM software system to be installed at the International Data Centre is laid out. The system is based on the operational computation of multi-dimensional source–receptor sensitivity fields for all RN samples by means of adjoint tracer transport modelling. While the source–receptor matrix methodology has already been applied in the past, the system that we suggest will be unique and unprecedented, since it is global, real-time and aims at uncovering source scenarios that are compatible with measurements. Furthermore, it has to deal with source dilution ratios that are by orders of magnitude larger than in typical transport model applications. This new verification software will need continuous scientific attention, and may well provide a prototype system for future applications in areas of environmental monitoring, emergency response and verification of other international agreements and treaties.

[1]  Sven-Erik Gryning,et al.  Air Pollution Modeling and Its Application XIV , 2001 .

[2]  Auer,et al.  Low level radioactivity measurement in support of the CTBTO. Comprehensive Nuclear-Test-Ban Treaty Organization , 2000, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[3]  Akiko Furuno,et al.  Evaluation of a long-range lagrangian dispersion model with ETEX , 1998 .

[4]  M. Chino.  WSPEEDI(Worldwide Version of SPEEDI) : A computer code system for the prediction of radiological impacts on Japanese due to a nuclear accident in foreign countries , 1995 .

[5]  Frédéric Hourdin,et al.  Sub‐surface nuclear tests monitoring through the CTBT Xenon Network , 2000 .

[6]  A. Stohl,et al.  Validation of the lagrangian particle dispersion model FLEXPART against large-scale tracer experiment data , 1998 .

[7]  Ulla Wandinger,et al.  Transport of boreal forest fire emissions from Canada , 2001 .

[8]  L.-E. De Geer.  Comprehensive nuclear-test-ban treaty : relevant radionuclides , 2001 .

[9]  R. Pielke,et al.  A comprehensive meteorological modeling system—RAMS , 1992 .

[10]  Petra Seibert,et al.  Inverse Modelling of Atmospheric Trace Substances on the Regional Scale with Lagrangian Models , 2002 .

[11]  Fausto Medici,et al.  The IMS radionuclide network of the CTBT , 2001 .

[12]  Louis Maresca,et al.  The Banning of Anti-Personnel Landmines: United Nations General Assembly, 1996 , 2000 .

[13]  Jerzy Bartnicki,et al.  Long-term trends in emissions and transboundary transport of acidifying air pollution in Europe , 1999 .

[14]  Janusz A. Pudykiewicz,et al.  APPLICATION OF ADJOINT TRACER TRANSPORT EQUATIONS FOR EVALUATING SOURCE PARAMETERS , 1998 .

[15]  Markus Amann,et al.  Integrated assessment of European air pollution emission control strategies , 1998, Environ. Model. Softw..

[16]  Sanna Syri,et al.  Regional nitrogen deposition model for integrated assessment of acidification and eutrophication , 2002 .

[17]  Petr Firbas,et al.  Introduction to the verification regime of the Comprehensive Nuclear-Test-Ban Treaty , 1999 .

[18]  Frédéric Hourdin,et al.  The Use of Finite-Volume Methods for Atmospheric Advection of Trace Species. Part I: Test of Various Formulations in a General Circulation Model , 1999 .

[19]  Petra Seibert,et al.  Iverse Modelling with a Lagrangian Particle Disperion Model: Application to Point Releases Over Limited Time Intervals , 2004 .

[20]  Trainer,et al.  The influence of canadian forest fires on pollutant concentrations in the united states , 2000, Science.

[21]  Hendrik Feldmann,et al.  The influence of stratospheric intrusions on alpine ozone concentrations , 2000 .

[22]  Helen ApSimon,et al.  Addressing uncertainty in environmental modelling: a case study of integrated assessment of strategies to combat long-range transboundary air pollution , 2002 .