How to tackle wet-deposition of radionuclides in the context of RN threshold-monitoring for CTBT verification?
Abstract
As contribution to the World Climate Research Program (WCRP) and in support of the Global Climate Observing System (GCOS) of the World Meteorological Organization (WMO), the Deutscher Wetterdienst (DWD) operates the Global Precipitation Climatology Centre (GPCC). The GPCC re-analysis and near-real time monitoring products are recognized world-wide as the most reliable global data set on rain-gauge based (in-situ) precipitation measurements. The GPCC Monitoring Product (Rudolf and Becker, 2010) is available two months after the fact based on the data gathered while listening to the GTS to fetch the SYNOP and CLIMAT messages. This product serves also the reference data to calibrate satellite based precipitation measurements yielding the Global Precipitation Climatology Project (GPCP) data set (Huffmann et al., 2009). The quickest GPCC product is the First Guess version of the GPCC Monitoring Product being available already 3-5 days after the month regarded. Both, the GPCC and the GPCP products bear the capability to serve as data base for the computational light-weight post processing of the wet deposition impact on the radionuclide monitoring capability of the CTBT network (Wotawa et al., 2009) on the regional and global scale, respectively. This is of major importance any time, a reliable quantitative assessment of the source-receptor sensitivity is needed, e.g. for the analysis of isotopic ratios. Actually the wet deposition recognition is a prerequisite if ratios of particulate and noble gas measurements come into play. This is so far a quite unexplored field of investigation, but would alleviate the clearance of several apparently CTBT relevant detections, encountered in the past, as bogus and provide an assessment for the so far overestimation of the IMS RN detection capability (Figure 1). References Huffman, G.J, et al., 2009: Improving the Global Precipitation Record: GPCP Version 2.1. Geophys. Res. Lett., 36,L17808, doi:10.1029/2009GL040000. Rudolf, B. and A. Becker, 2010: High-Resolution Precipitation Dataset, WMO/IOC/UNEP/ICSU GCOS, GCOS/WCRP AOPC-XVI, Geneva, Switzerland, 7 - 11 FEBRUARY 2011, Doc 12.1-V.1 Wotawa, G., Becker, A., et al. 2009: Computation and analysis of the global distribution of the Radioxenon Isotope 133Xe based on emissions from nuclear power plants and isotope production facilities and its relevance for the verification of the Nuclear-Test-Ban Treaty. Pure and Applied Geophysics Topical Volume 167 (4-5), 541-557
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.S41E..05B
- Keywords:
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- 0322 ATMOSPHERIC COMPOSITION AND STRUCTURE / Constituent sources and sinks;
- 0368 ATMOSPHERIC COMPOSITION AND STRUCTURE / Troposphere: constituent transport and chemistry;
- 3354 ATMOSPHERIC PROCESSES / Precipitation;
- 7219 SEISMOLOGY / Seismic monitoring and test-ban treaty verification