The polar cap magnetic activity indices in the southern (PCS) and northern (PCN) polar caps: Consistency and discrepancy

Lukianova, Renata; Трошичев, О. А.; Lu, G.

doi:10.1029/2002gl015179

Cited by 37 publications

(64 citation statements)

References 10 publications

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“…Since 1992, the time resolution of the PC index has been modified from 15 min to 1 min. Accordingly, the 1‐min PCS and PCN indices now show significant differences [ Lukianova et al , 2002]. Lukianova et al [2002] suggests that the different ways of determining the base lines and coefficients determinations cause the discrepancy.…”

Section: Polar Cap Indexmentioning

confidence: 99%

“…Accordingly, the 1‐min PCS and PCN indices now show significant differences [ Lukianova et al , 2002]. Lukianova et al [2002] suggests that the different ways of determining the base lines and coefficients determinations cause the discrepancy. Moreover, the 1‐min PCS index has been shown to be sensitive to other solar wind parameters such as dynamic pressure [ Lukianova et al , 2002].…”

Section: Polar Cap Indexmentioning

confidence: 99%

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Conductivity dependence of cross‐polar potential saturation

Nagatsuma¹

2004

J. Geophys. Res.

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[1] The cross-polar potential tends to be saturated when the value of the merging electric field (E m ) is high. Using data from the Wind and ACE satellites and the northern polar cap index (PCN) as a proxy for the cross-polar potential, Nagatsuma [2002] has shown that the degree of saturation does not depend on the intensity of the interplanetary magnetic field on the GSM-YZ plane (B T ) but depends on that of E m . This result supports the idea that the enhancement of the region 1 current plays a significant role in regulating the efficiency of the solar wind-magnetosphere interaction, since the intensity of the region 1 current is a function of E m . If the region 1 current controls the efficiency of the interaction, ionospheric conductivity also controls the degree of saturation, since the region 1 current system is a voltage generator. We have examined the solar zenith angle (SZA) dependence of the PCN saturation and have compared the SZA dependences of ionospheric conductivity models. Our statistical results show that the degree of saturation increases with decreasing solar zenith angle at the northern corrected geomagnetic pole under sunlit conditions and that the opposite trend occurs during darkness. These characteristics are explained by the SZA dependence of the total Pedersen conductivity estimated from the northern and southern polar caps. This result confirms that the development of the region 1 current plays a significant role in regulating magnetospheric convection.

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Section: Polar Cap Indexmentioning

confidence: 99%

Section: Polar Cap Indexmentioning

confidence: 99%

Conductivity dependence of cross‐polar potential saturation

Nagatsuma¹

2004

J. Geophys. Res.

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“…However, differences may arrive as the result both of different conditions in the two polar caps (e.g., different solar illumination) and of different response to forcing from the solar wind as well as different response to substorms. Such differences have the potential for interesting studies (e.g., Lukianova et al, 2002).…”

Section: Pcn Pcs and Combined Pc Index Pccmentioning

confidence: 99%

The Polar Cap PC Indices: Relations to Solar Wind and Global Disturbances

Stauning¹

2012

Exploring the Solar Wind

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“…This was shown in Lukianova et al (2002) and illustrated nicely in Fig. 4 from Lukianova (2007) and also Stauning et al (2006).…”

Section: The Quiet Level (δMδn )mentioning

confidence: 71%

The PC index: review of methods

McCreadie

Menvielle

2010

Ann. Geophys.

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Abstract. The Polar Cap (PC) index is a controversial topic within the IAGA scientific community. Since 1997 discussions of the validity of the index to be endorsed as an official IAGA index have ensued. There is no doubt as to the scientific merit of the index which is not discussed here. What is in doubt is the methodology of the derivation of the index by different groups. The Polar Cap index (PC: PCN, northern; PCS, southern) described in Troshichev et al. (2006) and Stauning et al. (2006), both termed the unified PC index, and the PCN index routinely derived at DMI are inspected using only available published literature. They are found to contain different derivation procedures, thus are not unified. The descriptions of the derivation procedures are found to not be adequate to independently derive the PC indices.

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The polar cap magnetic activity indices in the southern (PCS) and northern (PCN) polar caps: Consistency and discrepancy

Cited by 37 publications

References 10 publications

Conductivity dependence of cross‐polar potential saturation

Conductivity dependence of cross‐polar potential saturation

The Polar Cap PC Indices: Relations to Solar Wind and Global Disturbances

The PC index: review of methods

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