Temperature variability over the Po Valley, Italy, according to radiosounding data

Temperature variations registered above the southeast part of the Po Valley, Italy have been examined by applying the principal component analysis of radiosoung profiles recorded during the period from 1987 to 2010. Two data sets, considered to describe intra- and inter-annual oscillations, respecti...

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Main Author: Petkov, Boyan Hristozov
Format: Text
Language:unknown
Published: arXiv 2014
Subjects:
Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
Arctic
North Atlantic
Online Access:https://dx.doi.org/10.48550/arxiv.1410.8081
https://arxiv.org/abs/1410.8081
id ftdatacite:10.48550/arxiv.1410.8081
record_format openpolar
spelling ftdatacite:10.48550/arxiv.1410.8081 2023-05-15T15:07:45+02:00 Temperature variability over the Po Valley, Italy, according to radiosounding data Petkov, Boyan Hristozov 2014 https://dx.doi.org/10.48550/arxiv.1410.8081 https://arxiv.org/abs/1410.8081 unknown arXiv https://dx.doi.org/10.1155/2015/383614 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2014 ftdatacite https://doi.org/10.48550/arxiv.1410.8081 https://doi.org/10.1155/2015/383614 2022-04-01T12:50:35Z Temperature variations registered above the southeast part of the Po Valley, Italy have been examined by applying the principal component analysis of radiosoung profiles recorded during the period from 1987 to 2010. Two data sets, considered to describe intra- and inter-annual oscillations, respectively were extracted from the measurements data and the results show that both types of fluctuations can be projected onto four empirical orthogonal functions (EOF), interpreted as vertical distributions of oscillation amplitudes and four uncorrelated time series that represent the evolution of corresponding EOFs. It was found that intra-annual oscillations composed of periods between 30 and 120 days, together with inter-annual variations of 1- to 7-year period contribute to the highest extent (about 70 percents) the temperature oscillations up to 20 km, changing in both cases the phase in the tropopausal region. The other three EOFs indicate prevailing weight of the oscillations in the upper troposphere-low stratosphere region and are characterized by longer periods in both types of fluctuations. The intra-annual variations can be accounted for an interaction between Madden-Julian and Arctic oscillations, while the spectral features of inter-annual fluctuations could be associated with those of Quasi Biennial, El Nino and North Atlantic global oscillations. Text Arctic North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Arctic
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
spellingShingle Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
Petkov, Boyan Hristozov
Temperature variability over the Po Valley, Italy, according to radiosounding data
topic_facet Atmospheric and Oceanic Physics physics.ao-ph
FOS Physical sciences
description Temperature variations registered above the southeast part of the Po Valley, Italy have been examined by applying the principal component analysis of radiosoung profiles recorded during the period from 1987 to 2010. Two data sets, considered to describe intra- and inter-annual oscillations, respectively were extracted from the measurements data and the results show that both types of fluctuations can be projected onto four empirical orthogonal functions (EOF), interpreted as vertical distributions of oscillation amplitudes and four uncorrelated time series that represent the evolution of corresponding EOFs. It was found that intra-annual oscillations composed of periods between 30 and 120 days, together with inter-annual variations of 1- to 7-year period contribute to the highest extent (about 70 percents) the temperature oscillations up to 20 km, changing in both cases the phase in the tropopausal region. The other three EOFs indicate prevailing weight of the oscillations in the upper troposphere-low stratosphere region and are characterized by longer periods in both types of fluctuations. The intra-annual variations can be accounted for an interaction between Madden-Julian and Arctic oscillations, while the spectral features of inter-annual fluctuations could be associated with those of Quasi Biennial, El Nino and North Atlantic global oscillations.
format Text
author Petkov, Boyan Hristozov
author_facet Petkov, Boyan Hristozov
author_sort Petkov, Boyan Hristozov
title Temperature variability over the Po Valley, Italy, according to radiosounding data
title_short Temperature variability over the Po Valley, Italy, according to radiosounding data
title_full Temperature variability over the Po Valley, Italy, according to radiosounding data
title_fullStr Temperature variability over the Po Valley, Italy, according to radiosounding data
title_full_unstemmed Temperature variability over the Po Valley, Italy, according to radiosounding data
title_sort temperature variability over the po valley, italy, according to radiosounding data
publisher arXiv
publishDate 2014
url https://dx.doi.org/10.48550/arxiv.1410.8081
https://arxiv.org/abs/1410.8081
geographic Arctic
geographic_facet Arctic
genre Arctic
North Atlantic
genre_facet Arctic
North Atlantic
op_relation https://dx.doi.org/10.1155/2015/383614
op_rights arXiv.org perpetual, non-exclusive license
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
op_doi https://doi.org/10.48550/arxiv.1410.8081
https://doi.org/10.1155/2015/383614
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