The global-average production rate of10Be

Terrigenous supply of 10Be and dating with 14C and 10Be in sediments of the Angola basin (SE Antlantic)

“…This suggests an oceanic "Be precipitation rate of (100-530) x lo6 at.cm-' ka-' for the eastern equatorial Atlantic. These rates are close to the calculated global-average production rates of "Be of (350-1890) X lo6 at.cm-* ka-' as summarized from literature data by Monaghan et al [12] and the (520-2600) X lo6 (average 1210 X 106) at.cm-* ka-' based on data from precipitation collectors throughout the USA by the same authors. The supposed oceanic precipitation rate does not contradict the "Be accumulation rates of (160-1300) X lo6 at.cm-* ka-' which can be calculated from data for slow accumulating sediments in the Pacific given by Somayajulu [ll] and Tanaka and Inoue [5], the 190 x lo6 at.…”

“…The cosmogenic "Be in the upper atmosphere must fall on the ocean surface, most of it may be scavenged by bioactivity or adsorbed on particulate matter and precipitated to the ocean floor. Another part precipitates on land [12], is taken up in soils [13,14] and after erosion may reach the marine environment [9].…”

Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period

“…If the deposition rate of 23°Th in sediments is exactly equal to its production in the water column, then the flux of nuclide N at a specific site, F(N), could be evaluated as [23,51,52]: (2) where [N/Th]~d is the concentration ratio of nuclide N to the initial unsupported 23°Th in the sediment; PTh is the production rate of 23°Th which is proportional to water depth (i.e., PTh = 0.0026Z dpm/cm 2 ky -1, where depth, Z, is in meters). However, F(23°Th) is not equal to PTh in the real world because boundary scavenging can to some extent affect 23°Th [22,24].…”

“…Many applications of l°Be as a geochemical tracer require the atmospheric production rate of l°Be to be accurately known (see [2] for a review). One of the ways of estimating the global average 1°Be production rate involves measurement of l°Be in deep-sea sediments.…”

Preliminary study of 10 Be/ 7 Be in rainwater from Xi’an by Accelerator Mass Spectrometry

“…Given that the rainwater sample was collected on Aug 12, 2015 and we did the measurement on Oct 3, an interval of about 53 days; the corrected 7 Be value is 36.62 ions at the time of sample collection. In addition, total counts of 10 Be were 39 atoms within 600 s and the average current of Be rainwater values between 1.3-2.2 [18,25,[33][34][35], with some higher values [19]. All of these studies used a combination of γ-ray counting for 7 Be and AMS for 10 Be.…”