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| Home > Publications database > A case study on the impact of severe convective storms on the water vapor mixing ratio in the lower mid-latitude stratosphere observed in 2019 over Europe > print |
| 001 | 908560 | ||
| 005 | 20240712100902.0 | ||
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| 245 | _ | _ | |a A case study on the impact of severe convective storms on the water vapor mixing ratio in the lower mid-latitude stratosphere observed in 2019 over Europe |
| 260 | _ | _ | |a Katlenburg-Lindau |c 2022 |b EGU |
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| 520 | _ | _ | |a Extreme convective events in the troposphere not only have immediate impacts on the surface, but they can also influence the dynamics and composition of the lower stratosphere (LS). One major impact is the moistening of the LS by overshooting convection. This effect plays a crucial role in climate feedback, as small changes of water vapor in the upper troposphere and lower stratosphere (UTLS) have a large impact on the radiative budget of the atmosphere. In this case study, we investigate water vapor injections into the LS by two consecutive convective events in the European mid-latitudes within the framework of the MOSES (Modular Observation Solutions for Earth Systems) measurement campaign during the early summer of 2019. Using balloon-borne instruments, measurements of convective water vapor injection into the stratosphere were performed. Such measurements with a high vertical resolution are rare. The magnitude of the stratospheric water vapor reached up to 12.1 ppmv (parts per million by volume), with an estimated background value of 5 ppmv. Hence, the water vapor enhancement reported here is of the same order of magnitude as earlier reports of water vapor injection by convective overshooting over North America. However, the overshooting took place in the extratropical stratosphere over Europe and has a stronger impact on long-term water vapor mixing ratios in the stratosphere compared to the monsoon-influenced region in North America. At the altitude of the measured injection, a sharp drop in a local ozone enhancement peak makes the observed composition of air very unique with high ozone up to 650 ppbv (parts per billion by volume) and high water vapor up to 12.1 ppmv. ERA-Interim does not show any signal of the convective overshoot, the water vapor values measured by the Microwave Limb Sounder (MLS) in the LS are lower than the in situ observations, and the ERA5 overestimated water vapor mixing ratios. Backward trajectories of the measured injected air masses reveal that the moistening of the LS took place several hours before the balloon launch. This is in good agreement with the reanalyses, which shows a strong change in the structure of isotherms and a sudden and short-lived increase in potential vorticity at the altitude and location of the trajectory. Similarly, satellite data show low cloud-top brightness temperatures during the overshooting event, which indicates an elevated cloud top height. |
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| 700 | 1 | _ | |a Rolf, Christian |0 P:(DE-Juel1)139013 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Grooß, Jens-Uwe |0 P:(DE-Juel1)129122 |b 2 |
| 700 | 1 | _ | |a Müller, Rolf |0 P:(DE-Juel1)129138 |b 3 |
| 700 | 1 | _ | |a Konopka, Paul |0 P:(DE-Juel1)129130 |b 4 |u fzj |
| 700 | 1 | _ | |a Wieser, Andreas |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Krämer, Martina |0 P:(DE-Juel1)129131 |b 6 |
| 700 | 1 | _ | |a Riese, Martin |0 P:(DE-Juel1)129145 |b 7 |
| 773 | _ | _ | |a 10.5194/acp-22-1059-2022 |g Vol. 22, no. 2, p. 1059 - 1079 |0 PERI:(DE-600)2069847-1 |n 2 |p 1059 - 1079 |t Atmospheric chemistry and physics |v 22 |y 2022 |x 1680-7316 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/908560/files/acp-22-1059-2022.pdf |y OpenAccess |
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