@article{KornhuberPetoukhovPetrietal.2016,
  author    = {Kornhuber, Kai and Petoukhov, Vladimir and Petri, Stefan and Rahmstorf, Stefan and Coumou, Dim},
  title     = {Evidence for wave resonance as a key mechanism for generating high-amplitude quasi-stationary waves in boreal summer},
  series = {Climate dynamics : observational, theoretical and computational research on the climate system},
  volume    = {49},
  journal   = {Climate dynamics : observational, theoretical and computational research on the climate system},
  publisher = {Springer},
  address   = {New York},
  issn      = {0930-7575},
  doi       = {10.1007/s00382-016-3399-6},
  pages     = {1961 -- 1979},
  year      = {2016},
  abstract  = {Several recent northern hemisphere summer extremes have been linked to persistent high-amplitude wave patterns (e.g. heat waves in Europe 2003, Russia 2010 and in the US 2011, Floods in Pakistan 2010 and Europe 2013). Recently quasi-resonant amplification (QRA) was proposed as a mechanism that, when certain dynamical conditions are fulfilled, can lead to such high-amplitude wave events. Based on these resonance conditions a detection scheme to scan reanalysis data for QRA events in boreal summer months was implemented. With this objective detection scheme we analyzed the occurrence and duration of QRA events and the associated atmospheric flow patterns in 1979-2015 reanalysis data. We detect a total number of 178 events for wave 6, 7 and 8 and find that during roughly one-third of all high amplitude events QRA conditions were met for respective waves. Our analysis reveals a significant shift for quasi-stationary waves 6 and 7 towards high amplitudes during QRA events, lagging first QRA-detection by typically one week. The results provide further evidence for the validity of the QRA hypothesis and its important role in generating high amplitude waves in boreal summer.},
  language  = {en}
}
@misc{LawrenceSchaeferMurietal.2018,
  author    = {Lawrence, Mark and Sch{\"a}fer, Stefan and Muri, Helene and Scott, Vivian and Oschlies, Andreas and Vaughan, Naomi E. and Boucher, Olivier and Schmidt, Hauke and Haywood, Jim and Scheffran, J{\"u}rgen},
  title     = {Evaluating climate geoengineering proposals in the context of the Paris Agreement temperature goals},
  series = {Nature Communications},
  volume    = {9},
  journal   = {Nature Communications},
  publisher = {Nature Publ. Group},
  address   = {London},
  issn      = {2041-1723},
  doi       = {10.1038/s41467-018-05938-3},
  pages     = {19},
  year      = {2018},
  abstract  = {Current mitigation efforts and existing future commitments are inadequate to accomplish the Paris Agreement temperature goals. In light of this, research and debate are intensifying on the possibilities of additionally employing proposed climate geoengineering technologies, either through atmospheric carbon dioxide removal or farther-reaching interventions altering the Earth's radiative energy budget. Although research indicates that several techniques may eventually have the physical potential to contribute to limiting climate change, all are in early stages of development, involve substantial uncertainties and risks, and raise ethical and governance dilemmas. Based on present knowledge, climate geoengineering techniques cannot be relied on to significantly contribute to meeting the Paris Agreement temperature goals.},
  language  = {en}
}