TY - JOUR
T1 - An excess of 36Cl in modern atmospheric precipitation
AU - Blinov, A.
AU - Massonet, S.
AU - Sachsenhauser, H.
AU - Stan-Sion, C.
AU - Lazarev, V.
AU - Beer, J.
AU - Synal, H. A.
AU - Kaba, M.
AU - Masarik, J.
AU - Nolte, E.
N1 - Funding Information:
This work was supported by DFG, BMBF and the scientific-technical cooperation WTZ. We would like to thank Dr. M. Lawrence (Max Planck Institute for Chemistry, Mainz, Germany) for sending the OH data before publication. Three of us (A. B., C. St. and V. L.) would like to thank the German WE Heraeus foundation for supporting their participation in the AMS-8 conference (Vienna, 1999).
PY - 2000
Y1 - 2000
N2 - Measurements of 36Cl were performed in modern annual precipitation from many world-wide distributed stations. The measured deposition fluxes were on the average half an order of magnitude larger than fluxes calculated from the cosmic-ray-induced atmospheric production. These discrepancies were tentatively explained by recycling of bomb 36Cl from the biosphere as methyl chloride (CH3Cl) into the troposphere, destruction of CH3Cl by OH reactions and subsequent tropospheric deposition of 36Cl. Simulations were performed for natural atmospheric production, bomb fall-out and recycling of 36Cl. The simulations including recycling were qualitatively able to explain the excess in deposition fluxes, especially for tropical regions.
AB - Measurements of 36Cl were performed in modern annual precipitation from many world-wide distributed stations. The measured deposition fluxes were on the average half an order of magnitude larger than fluxes calculated from the cosmic-ray-induced atmospheric production. These discrepancies were tentatively explained by recycling of bomb 36Cl from the biosphere as methyl chloride (CH3Cl) into the troposphere, destruction of CH3Cl by OH reactions and subsequent tropospheric deposition of 36Cl. Simulations were performed for natural atmospheric production, bomb fall-out and recycling of 36Cl. The simulations including recycling were qualitatively able to explain the excess in deposition fluxes, especially for tropical regions.
UR - http://www.scopus.com/inward/record.url?scp=0034291250&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(00)00336-0
DO - 10.1016/S0168-583X(00)00336-0
M3 - Article
AN - SCOPUS:0034291250
SN - 0168-583X
VL - 172
SP - 537
EP - 544
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
ER -