Changing features of the Northern Hemisphere 500-hPa circumpolar vortex

Nazla Bushra; Nazla Bushra; Robert V. Rohli; Robert V. Rohli; Chunyan Li; Chunyan Li; Paul W. Miller; Paul W. Miller; Rubayet Bin Mostafiz; Rubayet Bin Mostafiz

doi:10.3389/fdata.2022.1009158

Frontiers in Big Data (Jan 2023)

Changing features of the Northern Hemisphere 500-hPa circumpolar vortex

Nazla Bushra,
Nazla Bushra,
Robert V. Rohli,
Robert V. Rohli,
Chunyan Li,
Chunyan Li,
Paul W. Miller,
Paul W. Miller,
Rubayet Bin Mostafiz,
Rubayet Bin Mostafiz

Affiliations

Nazla Bushra: Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, United States
Nazla Bushra: Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, United States
Robert V. Rohli: Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, United States
Robert V. Rohli: Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, United States
Chunyan Li: Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, United States
Chunyan Li: Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, United States
Paul W. Miller: Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, United States
Paul W. Miller: Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, United States
Rubayet Bin Mostafiz: Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA, United States
Rubayet Bin Mostafiz: Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, United States

DOI: https://doi.org/10.3389/fdata.2022.1009158
Journal volume & issue: Vol. 5

Abstract

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The tropospheric circumpolar vortex (CPV), an important signature of processes steering the general atmospheric circulation, surrounds each pole and is linked to the surface weather conditions. The CPV can be characterized by its area and circularity ratio (Rc), which both vary temporally. This research advances previous work identifying the daily 500-hPa Northern Hemispheric CPV (NHCPV) area, Rc, and temporal trends in its centroid by examining linear trends and periodic cycles in NHCPV area and Rc (1979–2017). Results suggest that NHCPV area has increased linearly over time. However, a more representative signal of the planetary warming may be the temporally weakening gradient which has blurred NHCPV distinctiveness—perhaps a new indicator of Arctic amplification. Rc displays opposing trends in subperiods and an insignificant overall trend. Distinct annual and semiannual cycles exist for area and Rc over all subperiods. These features of NHCPV change over time may impact surface weather/climate.

Published in Frontiers in Big Data

ISSN: 2624-909X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology: Technology (General): Industrial engineering. Management engineering: Information technology
Website: https://www.frontiersin.org/journals/big-data

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