Identification

Title

Time‐latitude distribution of prominences for 10 solar cycles: A study using Kodaikanal, Meudon, and Kanzelhohe data

Abstract

Solar prominences are structures of importance because of their role in polar field reversal. We study the long-term variation of the time latitude distribution of solar prominences in this article. To accomplish this, we primarily used the digitized disc-blocked Ca II K spectroheliograms as recorded from Kodaikanal Solar Observatory for the period of 1906-2002. For improving the data statistics we included full disc H-alpha images from Meudon and Kanzelhohe Observatory, which are available after 1980. We developed an automated technique to identify the latitudinal locations of prominences in daily images from all three data sets. Derived time-latitude distribution clearly depicted poleward migration of prominence structures for 10 cycles (15-24). Unlike previous studies, we separated the rate of poleward migration during onset and near pole, using piece-wise linear fits. In most cases, we found acceleration in poleward migration with the change occurring near +/- 70 degrees latitudes. The derived migration rates for such large number of solar cycles can provide important inputs toward understanding polar field buildup process.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7tt4v5z

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2020-03-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact