- 著者
- Satoshi Inomata Hiroshi Tanimoto Hiroyuki Yamada
- 出版者
- (社)日本化学会
- 雑誌
- Chemistry Letters (ISSN:03667022)
- 巻号頁・発行日
- vol.43, no.4, pp.538-540, 2014-04-05 (Released:2014-04-05)
- 参考文献数
- 21
- 被引用文献数
- 19 2
The detection properties of alkanes by proton-transfer-reaction plus switchable reagent ion mass spectrometry (PTR + SRI-MS) were investigated. Alkanes (RH) were commonly detected as R+ by PTR + SRI-MS using NO+ as the reagent ion, and detection sensitivities were comparable to those of aromatics observed by H3O+ ionization. It can be concluded that sensitive online measurement of multiple alkanes is possible by PTR + SRI-MS using NO+ as the reagent ion.
- 著者
- Kohei Ikeda Hiroshi Tanimoto Yugo Kanaya Fumikazu Taketani Atsushi Matsuki
- 出版者
- 公益社団法人 日本気象学会
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- vol.19, pp.239-245, 2023 (Released:2023-10-11)
- 参考文献数
- 23
We evaluated the mass concentration levels and long-term trends of black carbon (BC) in the historical and future scenario simulations using 12 climate models from the Coupled Model Intercomparison Project Phase 6 (CMIP6) for East Asia, the region with the largest anthropogenic emissions. By comparing them with surface observations at two regionally representative sites, Fukue and Noto, for the period of 2009-2020, we found that the CMIP6 multi-model mean was approximately two times higher than the observed BC concentrations and did not reproduce the observed decreasing trend before 2014. Sensitivity simulations of emission inventories using a chemical transport model, GEOS-Chem, suggested that the overestimation and increasing trend of Chinese BC emissions in the CMIP6 historical inventory (CEDSv2017-05-18) were responsible for the higher concentrations and opposite trends in the CMIP6 BC simulations. The direct radiative effect of BC for CEDS was estimated to be 72% larger in East Asia than that for the ECLIPSEv6b inventory, which reproduced the observed BC concentrations reasonably well.