 |
| Titel |
Solar cycle signals in sea level pressure and sea surface temperature |
| VerfasserIn |
I. Roy, J. D. Haigh |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 6 ; Nr. 10, no. 6 (2010-03-31), S.3147-3153 |
| Datensatznummer |
250008280
|
| Publikation (Nr.) |
 copernicus.org/acp-10-3147-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| We identify solar cycle signals in 155 years of global sea level pressure
(SLP) and sea surface temperature (SST) data using a multiple linear
regression approach. In SLP we find in the North Pacific a statistically
significant weakening of the Aleutian Low and a northward shift of the
Hawaiian High in response to higher solar activity, confirming the results
of previous authors using different techniques. We also find a weak but
broad reduction in pressure across the equatorial Pacific. In SST we
identify a weak El Niño-like pattern in the tropics for the 155 year
period, unlike the strong La Niña-like signal found recently by some
other authors. We show that the latter have been influenced by the technique
of compositing data from peak years of the sunspot cycle because these years
have often coincided with the negative phase of the ENSO cycle. Furthermore,
the date of peak annual sunspot number (SSN) generally falls a year or more
in advance of the broader maximum of the 11-year solar cycle so that
analyses which incorporate data from all years represent more coherently the
difference between periods of high and low solar activity on these
timescales. We also find that studies of the solar signal in SST over the
second half of the 20th century may alias as ENSO signal if this is not
properly taken into account. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|