Simulation of the atmospheric concentrations of 210Pb and 7Be and comparison with daily observations at three surface sites

被引：6

作者：

Heinrich, P. ^{[1
]}

Coindreau, O. ^{[1
]}

Grillon, Y. ^{[1
]}

Blanchard, X. ^{[1
]}

Gross, P. ^{[1
]}

机构：

[1] CEA, Dept Analyse Surveillance Environm, Bruyeres Le Chatel, France

来源：

ATMOSPHERIC ENVIRONMENT | 2007年 / 41卷 / 31期

关键词：

atmospheric transport; numerical modeling; natural radionuclides; particles rainout; LMDz model;

D O I：

10.1016/j.atmosenv.2007.04.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The atmospheric transport of Pb-210 and Be-7 is simulated by the Laboratoire de Meteorologie Dynamique general circulation model, LMDz, driven by ECMWF reanalyses. Daily averaged concentrations collected at three surface stations are compared with numerical results for a 1 year (2004) global simulation. The model, with a resolution of 3.75 degrees x 2.5 degrees and 19 levels, succeeds in reproducing daily variations of Pb-210 and Be-7 concentrations. Figures of merit in time (FMT), quantifying the overlapping of the predicted and observed time series over each month, range from 55% to 70%. Sensitivity studies as well as the analysis of numerical signals allow determining the main physical atmospheric processes characterizing the stations on a daily basis. Concentrations of Pb-210 at the three stations are particularly sensitive to scavenging in convective updrafts. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：6610 / 6621

页数：12

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