Zobrazeno 1 - 10
of 1 306
pro vyhledávání: '"von der Heydt, AS"'
Autor:
Terpstra, Sjoerd, Falkena, Swinda K. J., Bastiaansen, Robbin, Bathiany, Sebastian, Dijkstra, Henk A., von der Heydt, Anna S.
Research over the past decade has shown that multiple elements of the climate system, such as the Arctic Winter sea ice or the Amazon rainforest, could undergo abrupt shifts, but there are large uncertainties regarding their timing and spatial extent
Externí odkaz:
http://arxiv.org/abs/2410.19498
Learning low-dimensional numerical representations from symbolic data, e.g., embedding the nodes of a graph into a geometric space, is an important concept in machine learning. While embedding into Euclidean space is common, recent observations indic
Externí odkaz:
http://arxiv.org/abs/2410.06042
The subpolar gyre is at risk of crossing a tipping point which would result in the collapse of convection in the Labrador Sea. It is important to understand the mechanisms at play and how they are represented in climate models. In this study we use c
Externí odkaz:
http://arxiv.org/abs/2408.16541
Autor:
Bläsius, Thomas, von der Heydt, Jean-Pierre, Kisfaludi-Bak, Sándor, Wilhelm, Marcus, van Wordragen, Geert
We consider intersection graphs of disks of radius $r$ in the hyperbolic plane. Unlike the Euclidean setting, these graph classes are different for different values of $r$, where very small $r$ corresponds to an almost-Euclidean setting and $r \in \O
Externí odkaz:
http://arxiv.org/abs/2407.09362
The Lotka-Volterra system is a set of ordinary differential equations describing growth of interacting ecological species. This model has gained renewed interest in the context of random interaction networks. One of the debated questions is understan
Externí odkaz:
http://arxiv.org/abs/2404.14031
Climate policy has become increasingly politicized in many countries including the US, with some political parties unwilling to pursue strong measures. Therefore, to be successful in mitigation, climate policies must be politically feasible. Currentl
Externí odkaz:
http://arxiv.org/abs/2403.07681
Publikováno v:
Earth System Dynamics, Vol 15, Pp 1037-1054 (2024)
The mid-Pliocene is the most recent geological period with similar atmospheric CO2 concentration to the present day and similar surface temperatures to those projected at the end of this century for a moderate warming scenario. While not a perfect an
Externí odkaz:
https://doaj.org/article/b1e76f7c1b7f42be8c30e31ae7c7710b
Publikováno v:
Earth System Dynamics, Vol 15, Pp 859-873 (2024)
The Atlantic Meridional Overturning Circulation (AMOC) has recently been categorized as a core tipping element as, under climate change, it is believed to be prone to critical transition implying drastic consequences on a planetary scale. Moreover, t
Externí odkaz:
https://doaj.org/article/d98aad44a062444fb20c13c960fe8726
Autor:
Caitlyn R. Witkowski, Anna S. von der Heydt, Paul J. Valdes, Marcel T. J. van der Meer, Stefan Schouten, Jaap S. Sinninghe Damsté
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract Constraining the relationship between temperature and atmospheric concentrations of carbon dioxide (pCO2) is essential to model near-future climate. Here, we reconstruct pCO2 values over the past 15 million years (Myr), providing a series of
Externí odkaz:
https://doaj.org/article/a2b92b21484147e78157381fce2cda18
Autor:
J. E. Weiffenbach, H. A. Dijkstra, A. S. von der Heydt, A. Abe-Ouchi, W.-L. Chan, D. Chandan, R. Feng, A. M. Haywood, S. J. Hunter, X. Li, B. L. Otto-Bliesner, W. R. Peltier, C. Stepanek, N. Tan, J. C. Tindall, Z. Zhang
Publikováno v:
Climate of the Past, Vol 20, Pp 1067-1086 (2024)
During the mid-Pliocene warm period (mPWP; 3.264–3.025 Ma), atmospheric CO2 concentrations were approximately 400 ppm, and the Antarctic Ice Sheet was substantially reduced compared to today. Antarctica is surrounded by the Southern Ocean, which pl
Externí odkaz:
https://doaj.org/article/8daab18e584f4a1aa76fe43328a36d98