Issues with time-distance inversions for supergranular flows (Research Note)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315904" target="_blank" >RIV/00216208:11320/15:10315904 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/15:00450664
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201425203" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201425203</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201425203" target="_blank" >10.1051/0004-6361/201425203</a>
Alternative languages
Result language
angličtina
Original language name
Issues with time-distance inversions for supergranular flows (Research Note)
Original language description
Aims. Recent studies have shown that time-distance inversions for flows start to be dominated by a random noise at a depth of only a few Mm. It was proposed that the ensemble averaging might be a solution for learning about the structure of the convective flows, e.g. about the depth structure of supergranulation. Methods. Time-distance inversion is applied to the statistical sample of similar to 10(4) supergranules, which allows the inversion cost function to be regularised weakly about the random-noiseterm and thus provides a much better localisation in space. We compare these inversions at four depths (1.9, 2.9, 4.3, and 6.2 Mm) when using different spatio-temporal filtering schemes in order to gain confidence about these inferences. Results. The flows inferred by using different spatio-temporal filtering schemes are different (even by the sign) even though the formal averaging kernels and the random-noise levels are very similar. The inverted flows changes its sign several times wi
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GPP209%2F12%2FP568" target="_blank" >GPP209/12/P568: Convection and plasma motions in the near-surface layers of the solar convection zone</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy and Astrophysics [online]
ISSN
1432-0746
e-ISSN
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Volume of the periodical
575
Issue of the periodical within the volume
Neuveden
Country of publishing house
PL - POLAND
Number of pages
8
Pages from-to
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UT code for WoS article
000360710400023
EID of the result in the Scopus database
2-s2.0-84924709836