English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Using magnetic and microwave butterfly diagrams, we compare the behavior ofsolar polar regions to show that (i) the polar magnetic field and the microwavebrightness temperature during the solar minimum substantially diminished duringthe cycle 23/24 minimum compared to the 22/23 minimum. (ii) The polar microwavebrightness temperature (b) seems to be a good proxy for the underlying magneticfield strength (B). The analysis indicates a relationship, B = 0.0067Tb - 70,where B is in G and Tb in K. (iii) Both the brightness temperature and themagnetic field strength show north-south asymmetry most of the time except fora short period during the maximum phase. (iv) The rush-to-the-pole phenomenonobserved in the prominence eruption activity seems to be complete in thenorthern hemisphere as of March 2012. (v) The decline of the microwavebrightness temperature in the north polar region to the quiet-Sun levels andthe sustained prominence eruption activity poleward of 60oN suggest that solarmaximum conditions have arrived at the northern hemisphere. The southernhemisphere continues to exhibit conditions corresponding to the rise phase ofsolar cycle 24.

Behavior of Solar Cycles 23 and 24 Revealed by Microwave Observations