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| Hauptseite > Publikationsdatenbank > Zonally resolved impact of ENSO on the stratospheric circulation and water vapor entry values > print |
| Hauptseite > Publikationsdatenbank > Zonally resolved impact of ENSO on the stratospheric circulation and water vapor entry values > print |
| 001 | 824647 | ||
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| 100 | 1 | _ | |a Konopka, Paul |0 P:(DE-Juel1)129130 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Zonally resolved impact of ENSO on the stratospheric circulation and water vapor entry values |
| 260 | _ | _ | |a Hoboken, NJ |c 2016 |b Wiley |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Based on simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) for the period 1979–2013, with model transport driven by the ECMWF ERA-Interim reanalysis, we discuss the impact of the El Niño Southern Oscillation (ENSO) on the variability of the dynamics, water vapor, ozone, and mean age of air (AoA) in the tropical lower stratosphere during boreal winter. Our zonally resolved analysis at the 390 K potential temperature level reveals that not only (deseasonalized) ENSO-related temperature anomalies are confined to the tropical Pacific (180–300°E) but also anomalous wave propagation and breaking, as quantified in terms of the Eliassen-Palm (EP) flux divergence, with strongest local contribution during the La Niña phase. This anomaly is coherent with respective anomalies of water vapor (±0.5 ppmv) and ozone (±100 ppbv) derived from CLaMS being in excellent agreement with the Aura Microwave Limb Sounder observations. Thus, during El Niño a more zonally symmetric wave forcing drives a deep branch of the Brewer-Dobson (BD) circulation. During La Niña this forcing increases at lower levels (≈390 K) over the tropical Pacific, likely influencing the shallow branch of the BD circulation. In agreement with previous studies, wet (dry) and young (old) tape recorder anomalies propagate upward in the subsequent months following El Niño (La Niña). Using CLaMS, these anomalies are found to be around +0.3 (−0.2) ppmv and −4 (+4) months for water vapor and AoA, respectively. The AoA ENSO anomaly is more strongly affected by the residual circulation (≈2/3) than by eddy mixing (≈1/3). |
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| 700 | 1 | _ | |a Riese, Martin |0 P:(DE-Juel1)129145 |b 3 |u fzj |
| 773 | _ | _ | |a 10.1002/2015JD024698 |g Vol. 121, no. 19, p. 11,486 - 11,501 |0 PERI:(DE-600)2016800-7 |n 19 |p 11,486 - 11,501 |t Journal of geophysical research / Atmospheres |v 121 |y 2016 |x 2169-897X |
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