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J Environ Radioact. 2015 Oct;148:59-66. doi: 10.1016/j.jenvrad.2015.06.011. Epub 2015 Jun 24.

Latitudinal distributions of activities in atmospheric aerosols, deposition fluxes, and soil inventories of ⁷Be in the East Asian monsoon zone.

Author information

1
National Research Center for Geo-analysis, Beijing 100037, China.
2
National Research Center for Geo-analysis, Beijing 100037, China. Electronic address: pjsheng2000@hotmail.com.
3
College of Environmental Sciences, Qingdao University, Qingdao 266071, China.
4
Chinese Academy of Agriculture Sciences, Beijing 100081, China.
5
National Research Center for Geo-analysis, Beijing 100037, China. Electronic address: ylyang2003@163.com.

Abstract

Activities of atmospheric aerosols, bulk deposition fluxes, and undisturbed soil inventories of (7)Be were investigated in China's East Asian monsoon zone at various latitudes ranging from 23.8°N to 43.5°N. The annual latitudinal distributions of (7)Be concentrations in aerosols follow a distribution pattern which looks similar to a normal distribution with the maxima occurring in the mid-latitude region. Simultaneous measurements of (7)Be at various latitudes suggest that atmospheric circulation may play an important role in the latitudinal distributions of (7)Be in surface air. Latitude and wet precipitation are the main factors controlling the bulk (7)Be depositional fluxes. Significant seasonal variations in (7)Be depositional fluxes in Beijing, a mid-latitude city, were observed with the highest flux in summer and the lowest in winter, whereas less seasonality were found in the high- and the low-latitude cities. The highest (7)Be inventory in undisturbed soils in summer also occurred at a mid-latitudinal area in the East Asian monsoon zone. Precipitation is the main factor controlling the (7)Be soil inventory in Qingdao with the highest values occurring in autumn followed by summer.

KEYWORDS:

(7)Be; Atmospheric aerosol; China; Flux; Latitude; Soil inventory

PMID:
26114808
DOI:
10.1016/j.jenvrad.2015.06.011
[Indexed for MEDLINE]

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