IDV 09 and Heliospheric Magnetic Field 1835 - 2009
نویسنده
چکیده
We use recently acquired archival data to extend the IDV-index of long-term 6 geomagnetic activity. The new IDV series (IDV09) includes the years 1835-2009, vs. 7 1872-2004 for IDV05, with improved early data coverage, substantiating our earlier 8 work. Comparison of the IDV09-based HMF strength with other recent reconstructions of 9 solar wind B yields a strong consensus between series based on geomagnetic data, but 10 lack of support for a discordant series based on Be cosmic ray data. 11
منابع مشابه
A new reconstruction of the interplanetary magnetic field
We present a new reconstruction of the interplanetary magnetic field (IMF, B) for 1846–2012 with a full analysis of errors, based on the homogeneously constructed IDV(1d) composite of geomagnetic activity presented in Part 1 (Lockwood et al., 2013a). Analysis of the dependence of the commonly used geomagnetic indices on solar wind parameters is presented which helps explain why annual means of ...
متن کاملInterchange Reconnection: Remote Sensing of Solar Signature and Role in Heliospheric Magnetic Flux Budget
Interchange reconnection at the Sun, that is, reconnection between a doublyconnected field loop and singly-connected or open field line that extends to infinity, has important implications for the heliospheric magnetic flux budget. Recent work on the topic is reviewed, with emphasis on two aspects. The first is a possible heliospheric signature of interchange reconnection at the coronal hole bo...
متن کاملMesoscale Variations in the Heliospheric Magnetic Field and their Consequences in the Outer Heliosphere
This paper considers several different aspects of the magnetic field in the outer heliosphere and their consequences. It is noted first that many features of the heliospheric magnetic field are set back at the Sun, and that these processes result in variations in the heliospheric field on several distinct spatial scales. An equation is discussed that describes the interactions of mesoscale vari...
متن کاملEstimating total heliospheric magnetic flux from single-point in situ measurements
[1] A fraction of the total photospheric magnetic flux opens to the heliosphere to form the interplanetary magnetic field carried by the solar wind. While this open flux is critical to our understanding of the generation and evolution of the solar magnetic field, direct measurements are generally limited to single-point measurements taken in situ by heliospheric spacecraft. An observed latitude...
متن کاملSmall scale structures of the heliospheric magnetic field and the propagation of cosmic rays
___________________ Correspondence to: G. Erd V ([email protected]) Abstract. The heliospheric magnetic field is rich in highly fragmented small-scale structures. The magnetic background strongly influences the motion of the charged particles of relatively low rigidity. Using high time resolution magnetic field data measured by the magnetometer onboard Ulysses, we study the small-scale magneti...
متن کامل