Predictability of weather and climate

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Analysis of systematic biases in equatorial resolved and parameterized wave forcing of the quasi-biennial oscillation in a multi-model ensemble

Authors:

Hyun-Kyu Lee, James A Anstey, Hye-Yeong Chun, Shingo Watanabe, Francois Lott, Zhaoyang Chai, Yixiong Lu, Qi Tang, Jinbo Xie, Dong-Chan Hong, Seok-Woo Son, Federico Serva, Pu Lin, Martin B Andrews, Neal Butchart, Aleena M Jaison, Jeff R Knight, Scott Osprey, Hiroaki Naoe, Kohei Yoshida, Yoshio Kawatani, Jadwiga H Richter
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Attribution of the Australian bushfire risk to anthropogenic climate change

Authors:

Geert Jan van Oldenborgh, Folmer Krikken, Sophie Lewis, Nicholas J Leach, Flavio Lehner, Kate R Saunders, Michiel van Weele, Karsten Haustein, Sihan Li, David Wallom, Sarah Sparrow, Julie Arrighi, Roop P Singh, Maarten K van Aalst, Sjoukje Y Philip, Robert Vautard, Friederike EL Otto
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Building tangent-linear and adjoint models for data assimilation with neural networks

Authors:

Samuel Edward Hatfield, Matthew Chantry, Peter Dominik Dueben, Philippe Lopez, Alan Jon Geer, Tim N Palmer
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Calibrating large-ensemble European climate projections using observational data

Authors:

Christopher H O'Reilly, Daniel J Befort, Antje Weisheimer
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Canonical Valuations and the Birational Section Conjecture

Abstract:

We develop a notion of a `canonical $\mathcal{C}$-henselian valuation' for a class $\mathcal{C}$ of field extensions, generalizing the construction of the canonical henselian valuation of a field. We use this to show that the $p$-adic valuation on a finite extension $F$ of $\mathbb{Q}_p$ can be recovered entirely (or up to some indeterminacy of the residue field) from various small quotients of $G_F$, the absolute Galois group of $F$. In particular, it can be recovered fully from the maximal solvable quotient. We use this to prove several versions of the birational section conjecture for varieties over $p$-adic fields.
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