TY - JOUR
T1 - Classification of Dansgaard-Oeschger climatic cycles by the application of similitude signal processing
AU - Solé, Jordi
AU - Turiel, Antonio
AU - Llebot, Josep Enric
PY - 2007/6/25
Y1 - 2007/6/25
N2 - In this work we have performed a detailed analysis, using signal processing tools, to study time series of data (temperature proxy) extracted from the GRIP ice-core records and we relate it with the evolution of atmospheric CO2 within the last glacial period. Our method is based in considering the warm periods known as Dansgaard-Oeschger (D/O) events and posterior returns to the cold stage as a climatic cycle. After the warming phase, D/O events relax to the initial cold state in three different ways, what gives rise to three classes of cycles. Also, the Younger/Dryas-Bolling/Allerod (Y/D-B/A) cycle corresponds to one of the classes obtained. We have found that all cycles start with identical warming phases which seem completely unrelated to variations in CO2 concentration. We discuss on the consequences for global climatology of such steady pattern of cycles. © 2007 Elsevier B.V. All rights reserved.
AB - In this work we have performed a detailed analysis, using signal processing tools, to study time series of data (temperature proxy) extracted from the GRIP ice-core records and we relate it with the evolution of atmospheric CO2 within the last glacial period. Our method is based in considering the warm periods known as Dansgaard-Oeschger (D/O) events and posterior returns to the cold stage as a climatic cycle. After the warming phase, D/O events relax to the initial cold state in three different ways, what gives rise to three classes of cycles. Also, the Younger/Dryas-Bolling/Allerod (Y/D-B/A) cycle corresponds to one of the classes obtained. We have found that all cycles start with identical warming phases which seem completely unrelated to variations in CO2 concentration. We discuss on the consequences for global climatology of such steady pattern of cycles. © 2007 Elsevier B.V. All rights reserved.
KW - Climatic cycles
KW - D/O events
KW - Signal processing
U2 - 10.1016/j.physleta.2007.02.035
DO - 10.1016/j.physleta.2007.02.035
M3 - Article
SN - 0375-9601
VL - 366
SP - 184
EP - 189
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 3
ER -