caa a22 4500 605472025 CHVBK 20210128100336.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00382-014-2331-1 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2331-1 Multispectral analysis of Northern Hemisphere temperature records over the last five millennia [Elektronische Daten] [C. Taricco, S. Mancuso, F. Ljungqvist, S. Alessio, M. Ghil] Aiming to describe spatio-temporal climate variability on decadal-to-centennial time scales and longer, we analyzed a data set of 26 proxy records extending back 1,000-5,000 years; all records chosen were calibrated to yield temperatures. The seven irregularly sampled series in the data set were interpolated to a regular grid by optimized methods and then two advanced spectral methods—namely singular-spectrum analysis (SSA) and the continuous wavelet transform—were applied to individual series to separate significant oscillations from the high noise background. This univariate analysis identified several common periods across many of the 26 proxy records: a millennial trend, as well as oscillations of about 100 and 200 years, and a broad peak in the 40-70-year band. To study common NH oscillations, we then applied Multichannel SSA. Temperature variations on time scales longer than 600 years appear in our analysis as a dominant trend component, which shows climate features consistent with the Medieval Warm Period and the Little Ice Age. Statistically significant NH-wide peaks appear at 330, 250 and 110years, as well as in a broad 50-80-year band. Strong variability centers in several bands are located around the North Atlantic basin and are in phase opposition between Greenland and Western Europe. Springer-Verlag Berlin Heidelberg, 2014 Space-and-time domain analysis nationallicence Multi-scale analysis of time series nationallicence Climatic oscillations nationallicence Recent paleoclimate nationallicence Temperature proxy records nationallicence Past two millennia nationallicence Solar forcing nationallicence Taricco C. Dipartimento di Fisica, Università di Torino, Turin, Italy aut Mancuso S. INAF - Osservatorio Astrofisico di Torino, Pino Torinese, Italy aut Ljungqvist F. Department of History, Stockholm University, Stockholm, Sweden aut Alessio S. Dipartimento di Fisica, Università di Torino, Turin, Italy aut Ghil M. Geosciences Department and Laboratoire de Météorologie Dynamique (CNRS and IPSL), École Normale Supérieure, Paris, France aut Climate Dynamics Springer Berlin Heidelberg 45/1-2(2015-07-01), 83-104 0930-7575 45:1-2<83 2015 45 382 https://doi.org/10.1007/s00382-014-2331-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2331-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Taricco C. Dipartimento di Fisica, Università di Torino, Turin, Italy aut NATIONALLICENCE 700 1- Mancuso S. INAF - Osservatorio Astrofisico di Torino, Pino Torinese, Italy aut NATIONALLICENCE 700 1- Ljungqvist F. Department of History, Stockholm University, Stockholm, Sweden aut NATIONALLICENCE 700 1- Alessio S. Dipartimento di Fisica, Università di Torino, Turin, Italy aut NATIONALLICENCE 700 1- Ghil M. Geosciences Department and Laboratoire de Météorologie Dynamique (CNRS and IPSL), École Normale Supérieure, Paris, France aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/1-2(2015-07-01), 83-104 0930-7575 45:1-2<83 2015 45 382