Tags

Type your tag names separated by a space and hit enter

Eclipse-induced wind changes over the British Isles on the 20 March 2015.

Abstract

The British Isles benefits from dense meteorological observation networks, enabling insights into the still-unresolved effects of solar eclipse events on the near-surface wind field. The near-surface effects of the solar eclipse of 20 March 2015 are derived through comparison of output from the Met Office's operational weather forecast model (which is ignorant of the eclipse) with data from two meteorological networks: the Met Office's land surface station (MIDAS) network and a roadside measurement network operated by Vaisala. Synoptic-evolution relative calculations reveal the cooling and increase in relative humidity almost universally attributed to eclipse events. In addition, a slackening of wind speeds by up to about 2 knots in already weak winds and backing in wind direction of about 20° under clear skies across middle England are attributed to the eclipse event. The slackening of wind speed is consistent with the previously reported boundary layer stabilization during eclipse events. Wind direction changes have previously been attributed to a large-scale 'eclipse-induced cold-cored cyclone', mountain slope flows, and changes in the strength of sea breezes. A new explanation is proposed here by analogy with nocturnal wind changes at sunset and shown to predict direction changes consistent with those observed.This article is part of the themed issue 'Atmospheric effects of solar eclipses stimulated by the 2015 UK eclipse'.

Authors+Show Affiliations

Department of Meteorology, University of Reading, PO Box 243, Reading RG6 6BB, UK s.l.gray@reading.ac.uk.Department of Meteorology, University of Reading, PO Box 243, Reading RG6 6BB, UK.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27550759

Citation

Gray, S L., and R G. Harrison. "Eclipse-induced Wind Changes Over the British Isles On the 20 March 2015." Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences, vol. 374, no. 2077, 2016.
Gray SL, Harrison RG. Eclipse-induced wind changes over the British Isles on the 20 March 2015. Philos Trans A Math Phys Eng Sci. 2016;374(2077).
Gray, S. L., & Harrison, R. G. (2016). Eclipse-induced wind changes over the British Isles on the 20 March 2015. Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences, 374(2077), doi:10.1098/rsta.2015.0224.
Gray SL, Harrison RG. Eclipse-induced Wind Changes Over the British Isles On the 20 March 2015. Philos Trans A Math Phys Eng Sci. 2016 Sep 28;374(2077) PubMed PMID: 27550759.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Eclipse-induced wind changes over the British Isles on the 20 March 2015. AU - Gray,S L, AU - Harrison,R G, PY - 2016/03/29/accepted PY - 2016/8/24/entrez PY - 2016/8/24/pubmed PY - 2016/8/24/medline KW - eclipse KW - measurements KW - meteorology KW - nocturnal jet JF - Philosophical transactions. Series A, Mathematical, physical, and engineering sciences JO - Philos Trans A Math Phys Eng Sci VL - 374 IS - 2077 N2 - The British Isles benefits from dense meteorological observation networks, enabling insights into the still-unresolved effects of solar eclipse events on the near-surface wind field. The near-surface effects of the solar eclipse of 20 March 2015 are derived through comparison of output from the Met Office's operational weather forecast model (which is ignorant of the eclipse) with data from two meteorological networks: the Met Office's land surface station (MIDAS) network and a roadside measurement network operated by Vaisala. Synoptic-evolution relative calculations reveal the cooling and increase in relative humidity almost universally attributed to eclipse events. In addition, a slackening of wind speeds by up to about 2 knots in already weak winds and backing in wind direction of about 20° under clear skies across middle England are attributed to the eclipse event. The slackening of wind speed is consistent with the previously reported boundary layer stabilization during eclipse events. Wind direction changes have previously been attributed to a large-scale 'eclipse-induced cold-cored cyclone', mountain slope flows, and changes in the strength of sea breezes. A new explanation is proposed here by analogy with nocturnal wind changes at sunset and shown to predict direction changes consistent with those observed.This article is part of the themed issue 'Atmospheric effects of solar eclipses stimulated by the 2015 UK eclipse'. SN - 1364-503X UR - https://www.unboundmedicine.com/medline/citation/27550759/Eclipse_induced_wind_changes_over_the_British_Isles_on_the_20_March_2015_ L2 - https://royalsocietypublishing.org/doi/full/10.1098/rsta.2015.0224?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -