Premium
The prelude to the deep minimum between solar cycles 23 and 24: Interplanetary scintillation signatures in the inner heliosphere
Author(s) -
Janardhan P.,
Bisoi Susanta Kumar,
Ananthakrishnan S.,
Tokumaru M.,
Fujiki K.
Publication year - 2011
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2011gl049227
Subject(s) - heliosphere , interplanetary scintillation , scintillation , interplanetary spaceflight , physics , interplanetary medium , astronomy , solar wind , astrobiology , solar physics , astrophysics , coronal mass ejection , optics , nuclear physics , plasma , detector
Extensive interplanetary scintillation (IPS) observations at 327 MHz obtained between 1983 and 2009 clearly show a steady and significant drop in the turbulence levels in the entire inner heliosphere starting from around ∼1995. We believe that this large‐scale IPS signature, in the inner heliosphere, coupled with the fact that solar polar fields have also been declining since ∼1995, provide a consistent result showing that the buildup to the deepest minimum in 100 years actually began more than a decade earlier.