Satoshi Sugawara

TL;DR: In this paper, the authors used balloon-borne measurements of stratospheric trace gases over the past 30 years to derive the mean age of air from sulphur hexafluoride (SF6) and CO2 mixing ratios.

TL;DR: In this article, the authors used initial emissions from bottom-up inventories for anthropogenic sources, emissions from wetlands and rice paddies simulated by a~terrestrial biogeochemical model, and an atmospheric general circulation model (AGCM)-based chemistry-transport model (i.e. ACTM) to simulate atmospheric CH4 concentrations for 1910-2010.

TL;DR: In this article, 370 air samples collected using aircraft in the troposphere over Russia in the summers of 1992, 1993, and 1994 were analyzed for the CO2, CH4, N2O and CO concentrations, as well as for δ13C and δ18O of CO2.

TL;DR: In this article, the authors reexamine nearly four decades of in situ balloon-based stratospheric observations of SF6 and CO2 with an idealized model and reanalysis products.

TL;DR: In this article, the authors measured air withdrawn from the firn at four polar sites (Dome Fuji, H72 and YM85, Antarctica and North GRIP, Greenland) for δ 15 No f N2 and δ 18 Oo f O2 to test for the presence of convective air mixing.