Anomalies in the seasonal cycle of sea level pressure in Iceland and the North Atlantic Oscillation
Open accessAbstract
This letter presents an analysis of a new homogenized time series of daily mean sea level pressure (SLP) from Reykjavík and Stykkishólmur, Iceland from 1823–1999. Time series statistical techniques including harmonic analysis are used to identify the seasonal march of pressure and its variability through the record. The results are assessed regarding the North Atlantic Oscillation (NAO) index. In addition to the annual cycle, the seasonal march of SLP has an appreciable semi‐annual cycle, as well as anomalies (abrupt rises and falls) occurring at remarkably distinct times in spring and winter. Multidecadal variability is apparent in the seasonal cycle and the anomalies. A shift in intraseasonal variability is observed in recent decades, including an extension of the winter Icelandic Low enhancement period into March. Increasing failure or delay of the “usual” abrupt pressure rise in Iceland in late February has contributed to the unusually positive winter NAO index values since the 1960s.
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Atmospheric pressure and electromagnetic fields on Earth's surface show annual variations, making it possible that the sensing of lunar rhythms may be facilitated during the winter.
“However, the atmospheric pressure and the electromagnetic fields on Earth’s surface show annual variations (37, 38), making it possible that the sensing of lunar rhythms may be facilitated during the winter.”
From Women temporarily synchronize their menstrual cycles with the luminance and gravimetric cycles of the Moon (2021) · cites this paper as [37]
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“However, the atmospheric pressure and the electromagnetic fields on Earth’s surface show annual variations (37, 38), making it possible that the sensing of lunar rhythms may be facilitated during the winter.”
Background
- Authors
- Jónsson, T., & Miles, M. W.
- Affiliations
- Bjerknes Centre for Climate Research (NO)
- University of Colorado Boulder (US)
- ORCID
- Miles, Martin W.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2001-11-15
- Volume
- 28
- Issue
- 22
- Pages
- 4231-4234
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W1993130917
- Cited by
- 14
- References
- 19
- Citations by year
- 2021: 1 · 2015: 1
- FWCI
- 2.41
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Geophysical Research Letters (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Keywords
- sea level pressure, seasonal cycle, North Atlantic Oscillation, Icelandic Low, pressure anomalies, semiannual cycle, multidecadal variability, intraseasonal variability, Reykjavík, harmonic analysis
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