18 citations · 39 across the 8 of their papers we have counts for
11 papers
Persistence of temperature and precipitation: from local to global anomalies
Jouni J. Takalo
Using detrended fluctuation analysis (DFA) we find that all continents are persistent in temperature. The scaling exponents of the southern hemisphere (SH) continents, i.e., South…
Separating aa-index into Solar and Hale Cycle Related Components Using Principal Component Analysis
Jouni Takalo
We decompose the monthly aa-index of cycles 10-23 using principal component analysis (PCA). We show that the first component (PC1) is related to solar cycle, and accounts for 41.5…
Comparison of geomagnetic indices during even and odd solar cycles SC17-SC24: Signatures of Gnevyshev gap in geomagnetic activity
Jouni J. Takalo
We show that the time series of sunspot-group areas has a gap, the so-called Gnevyshev gap (GG), between ascending and descending phases of the cycle and especially so for the even…
Temporal Distribution of Solar Cycle 24 Sunspot Groups: Comparison to Cycles 12-23
Jouni J. Takalo
We analyze the temporal distribution of sunspot groups for even and odd cycles in the range SC12-SC24. It seems that cycle 24 is a characteristic even cycle, although with low ampl…
Trends of continental, zonal and seasonal land temperatures in the 20th century
Jouni Takalo, Kalevi Mursula
We study the evolution of continental, zonal and seasonal land temperature anomalies especially in the early 20th century warming (ETCW) period, using principal component analysis…
On the self-replicating properties of Riemann zeta zeros: A statistical study
Jouni J. Takalo
We study distributions of differences of unscaled Riemann zeta zeros, , at large distances. We show, that independently of the height, a subset of finite number of success…