Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Discussion papers
https://doi.org/10.5194/acpd-15-22701-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acpd-15-22701-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Submitted as: research article 25 Aug 2015

Submitted as: research article | 25 Aug 2015

Review status
This discussion paper is a preprint. It has been under review for the journal Atmospheric Chemistry and Physics (ACP). The revised manuscript was not accepted.

Observation of a tidal effect on the Polar Jet Stream

C. H. Best1 and R. Madrigali2 C. H. Best and R. Madrigali
  • 1Independent Scientist, Huntingdon, UK
  • 2Independent Scientist, Grosseto, Italy

Abstract. Variations in the Polar Jet Stream directly affect weather across Europe and North America (Francis et al., 2012). Jet Stream dynamics are governed by the development of planetary Rossby waves (Dickinson, 1978) driven by variation of the Coriolis force with latitude. Here we show that increasing atmospheric tides induce the development of Rossby waves, especially during winter months. This changes the flow and direction of the Jet Stream, as measured by the Arctic Oscillation (AO). Although horizontal tidal forces are tiny (107 smaller than gravity), they act over huge areas dragging the Jet Stream flow southwards in regular pulses as the earth rotates. This induces a changing Coriolis torque, which then distorts the Jet Stream flow. The data from eight recent winters are studied indicating that the AO is anti-correlated to the horizontal "tractional" component of tides acting between latitude 45 and 60° N. The observed 28 day cycle in Jet Stream flow and extent has a statistical significance > 99 %. A cross-correlation between all daily AO data since 1950 and the tractional tidal strength shows a significant anti-correlation with a lag time of ~ 5 days. The strongest correlation and largest excursions of the AO are observed during winter 2005/2006 – a maximum lunar standstill year. This declination dependence of tidal forces at high latitudes is the proposed cause of many previous reports of an 18.6 year dependence of continental rainfall and drought.

C. H. Best and R. Madrigali
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
C. H. Best and R. Madrigali
C. H. Best and R. Madrigali
Viewed  
Total article views: 3,461 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
2,584 754 123 3,461 281 81 108
  • HTML: 2,584
  • PDF: 754
  • XML: 123
  • Total: 3,461
  • Supplement: 281
  • BibTeX: 81
  • EndNote: 108
Views and downloads (calculated since 25 Aug 2015)
Cumulative views and downloads (calculated since 25 Aug 2015)
Cited  
Saved  
Discussed  
Latest update: 23 Aug 2019
Publications Copernicus
Download
Short summary
This paper demonstrates for the first time a direct link between atmospheric tides and the Polar Jet Stream flow. The authors have identified an anti-correlation of the Arctic Oscillation with the horizontal (‘tractional’) tidal force acting at high latitudes, particularly during winter months. The tractional force varies strongly during the lunar month and with the 18.6 year precession cycle of the lunar orbit. Changes in Jet Stream flow have a large effect on winter weather.
This paper demonstrates for the first time a direct link between atmospheric tides and the Polar...
Citation