ENSO affects the North Atlantic Oscillation 1 year later.

Autor: Scaife AA; Met Office Hadley Centre, Exeter, UK.; Department of Mathematics and Statistics, University of Exeter, Exeter, UK., Dunstone N; Met Office Hadley Centre, Exeter, UK., Hardiman S; Met Office Hadley Centre, Exeter, UK., Ineson S; Met Office Hadley Centre, Exeter, UK., Li C; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China., Lu R; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China., Pang B; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China., Klein-Tank A; Delta Climate Center (DCC), Vlissingen, Netherlands., Smith D; Met Office Hadley Centre, Exeter, UK., Van Niekerk A; Met Office Hadley Centre, Exeter, UK.; European Centre for Medium-Range Weather Forecasts, Reading, UK., Renwick J; School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand., Williams N; Department of Mathematics and Statistics, University of Exeter, Exeter, UK.; Max Planck Institute for Meteorology, Hamburg, Germany.

Publikováno v: Science (New York, N.Y.) [Science] 2024 Oct 04; Vol. 386 (6717), pp. 82-86. Date of Electronic Publication: 2024 Oct 03.

Magnetic fields and differential rotation on the pre-main sequence III: The early-G star HD 106506

Autor: Waite, I. A., Marsden, S. C., Carter, B. D., Hart, R., Donati, J. -F., Vélez, J. C. Ramírez, Semel, M., Dunstone, N.

We present photometry and spectropolarimetry of the pre-main sequence star HD 106506. A photometric rotational period of ~1.416 +/- 0.133 days has been derived using observations at Mount Kent Observatory (MKO). Spectropolarimetric data taken at the

Externí odkaz: http://arxiv.org/abs/1102.3475

Magnetic fields and differential rotation on the pre-main sequence I: The early-G star HD 141943 - brightness and magnetic topologies

Autor: Marsden, S. C., Jardine, M. M., Vélez, J. C. Ramírez, Alecian, E., Brown, C. J., Carter, B. D., Donati, J. F., Dunstone, N., Hart, R., Semel, M., Waite, I. A.

Spectroscopic and spectropolarimetric observations of the pre-main sequence early-G star HD 141943 were obtained at four observing epochs (in 2006, 2007, 2009 and 2010). The observations were undertaken at the 3.9-m Anglo-Australian Telescope using t

Externí odkaz: http://arxiv.org/abs/1101.5859

Surface magnetic fields on two accreting T Tauri stars: CV Cha and CR Cha

Autor: Hussain, G. A. J., Cameron, A. Collier, Jardine, M. M., Dunstone, N., Velez, J. Ramirez, Stempels, H. C., Donati, J. -F., Semel, M., Aulanier, G., Harries, T., Bouvier, J., Dougados, C., Ferreira, J., Carter, B. D., Lawson, W. A.

We have produced brightness and magnetic field maps of the surfaces of CV Cha and CR Cha: two actively accreting G and K-type T Tauri stars in the Chamaeleon I star-forming cloud with ages of 3-5 Myr. Our magnetic field maps show evidence for strong,

Externí odkaz: http://arxiv.org/abs/0905.0914

The first magnetic maps of a pre-main sequence binary star system - HD 155555

Autor: Dunstone, N. J., Hussain, G. A. J., Cameron, A. Collier, Marsden, S. C., Jardine, M., Stempels, H. C., Vlex, J. C. Ramirez, Donati, J. -F.

We present the first maps of the surface magnetic fields of a pre-main sequence binary system. Spectropolarimetric observations of the young, 18 Myr, HD 155555 (V824 Ara, G5IV + K0IV) system were obtained at the Anglo-Australian Telescope in 2004 and

Externí odkaz: http://arxiv.org/abs/0803.0837