Research output: Contribution to journal › Article › peer-review
Long-term correlation between the Nao and solar activity. / Lukianova, Renata; Alekseev, Genrich.
In: Solar Physics, Vol. 224, No. 1-2, 01.10.2005, p. 445-454.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Long-term correlation between the Nao and solar activity
AU - Lukianova, Renata
AU - Alekseev, Genrich
PY - 2005/10/1
Y1 - 2005/10/1
N2 - We extend the correlation analysis of solar signals and the North Atlantic Oscillation (NAO) back in time by using the aa index (since 1868) and the PC index (since 1948) as a proxy of the solar wind energy imparted to the magnetosphere. Prior to the 1940s the records of the NAO and the aa index were not closely connected, while after the 1940s their rhythms matched. We compare two distinctive periods with recent results on the long-scale reconstruction of solar activity. The shift in the NAO-aa interconnection can provide the explanation of a significant increase of solar activity after the 1940s. A strengthening of the interplanetary magnetic field leads to more intensive variations of the high-latitude ionospheric electric field that influences the atmospheric circulation.
AB - We extend the correlation analysis of solar signals and the North Atlantic Oscillation (NAO) back in time by using the aa index (since 1868) and the PC index (since 1948) as a proxy of the solar wind energy imparted to the magnetosphere. Prior to the 1940s the records of the NAO and the aa index were not closely connected, while after the 1940s their rhythms matched. We compare two distinctive periods with recent results on the long-scale reconstruction of solar activity. The shift in the NAO-aa interconnection can provide the explanation of a significant increase of solar activity after the 1940s. A strengthening of the interplanetary magnetic field leads to more intensive variations of the high-latitude ionospheric electric field that influences the atmospheric circulation.
UR - http://www.scopus.com/inward/record.url?scp=20944452175&partnerID=8YFLogxK
U2 - 10.1007/s11207-005-4974-x
DO - 10.1007/s11207-005-4974-x
M3 - Article
AN - SCOPUS:20944452175
VL - 224
SP - 445
EP - 454
JO - Solar Physics
JF - Solar Physics
SN - 0038-0938
IS - 1-2
ER -
ID: 36801811