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High-latitude ion temperature climatology during the International Polar Year 2007-2008

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High-latitude ion temperature climatology during the International Polar Year 2007-2008. / Yamazaki, Yosuke; Kosch, Michael Jurgen; Ogawa, Yasunobu; Themens, David.

In: Journal of Space Weather and Space Climate, Vol. 6, A35, 07.10.2016.

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Yamazaki, Yosuke ; Kosch, Michael Jurgen ; Ogawa, Yasunobu ; Themens, David. / High-latitude ion temperature climatology during the International Polar Year 2007-2008. In: Journal of Space Weather and Space Climate. 2016 ; Vol. 6.

Bibtex

@article{249a29ed98c84941beec27895f39bfcf,
title = "High-latitude ion temperature climatology during the International Polar Year 2007-2008",
abstract = "This article presents the results of an ion temperature climatology study that examined ionospheric measurements from the European Incoherent SCATter (EISCAT) Svalbard Radar (ESR: 78.2° N, 16.0° E) and the Poker Flat Incoherent Scatter Radar (PFISR: 65.1° N, 212.6° E) during the year-long campaign of the International Polar Year (IPY) from March 2007 to February 2008. These observations were compared with those of the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIE-GCM), as well as the International Reference Ionosphere 2012 (IRI-2012). Fairly close agreement was found between the observations and TIE-GCM results. Numerical experiments revealed that the daily variation in the high-latitude ion temperature, about 100–200 K, is mainly due to ion frictional heating. The ion temperature was found to increase in response to elevated geomagnetic activity at both ESR and PFISR, which is consistent with the findings of previous studies. At ESR, a strong response occurred during the daytime, which was interpreted as a result of dayside-cusp heating. Neither TIE-GCM nor IRI-2012 reproduced the strong geomagnetic activity response at ESR, underscoring the need for improvement in both models at polar latitudes.",
keywords = "Ion temperature, EISCAT Svalbard radar, Poker Flat Incoherent Scatter Radar, TIE-GCM , IRI, International Polar Year",
author = "Yosuke Yamazaki and Kosch, {Michael Jurgen} and Yasunobu Ogawa and David Themens",
year = "2016",
month = "10",
day = "7",
doi = "10.1051/swsc/2016029",
language = "English",
volume = "6",
journal = "Journal of Space Weather and Space Climate",
issn = "2115-7251",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - High-latitude ion temperature climatology during the International Polar Year 2007-2008

AU - Yamazaki, Yosuke

AU - Kosch, Michael Jurgen

AU - Ogawa, Yasunobu

AU - Themens, David

PY - 2016/10/7

Y1 - 2016/10/7

N2 - This article presents the results of an ion temperature climatology study that examined ionospheric measurements from the European Incoherent SCATter (EISCAT) Svalbard Radar (ESR: 78.2° N, 16.0° E) and the Poker Flat Incoherent Scatter Radar (PFISR: 65.1° N, 212.6° E) during the year-long campaign of the International Polar Year (IPY) from March 2007 to February 2008. These observations were compared with those of the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIE-GCM), as well as the International Reference Ionosphere 2012 (IRI-2012). Fairly close agreement was found between the observations and TIE-GCM results. Numerical experiments revealed that the daily variation in the high-latitude ion temperature, about 100–200 K, is mainly due to ion frictional heating. The ion temperature was found to increase in response to elevated geomagnetic activity at both ESR and PFISR, which is consistent with the findings of previous studies. At ESR, a strong response occurred during the daytime, which was interpreted as a result of dayside-cusp heating. Neither TIE-GCM nor IRI-2012 reproduced the strong geomagnetic activity response at ESR, underscoring the need for improvement in both models at polar latitudes.

AB - This article presents the results of an ion temperature climatology study that examined ionospheric measurements from the European Incoherent SCATter (EISCAT) Svalbard Radar (ESR: 78.2° N, 16.0° E) and the Poker Flat Incoherent Scatter Radar (PFISR: 65.1° N, 212.6° E) during the year-long campaign of the International Polar Year (IPY) from March 2007 to February 2008. These observations were compared with those of the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIE-GCM), as well as the International Reference Ionosphere 2012 (IRI-2012). Fairly close agreement was found between the observations and TIE-GCM results. Numerical experiments revealed that the daily variation in the high-latitude ion temperature, about 100–200 K, is mainly due to ion frictional heating. The ion temperature was found to increase in response to elevated geomagnetic activity at both ESR and PFISR, which is consistent with the findings of previous studies. At ESR, a strong response occurred during the daytime, which was interpreted as a result of dayside-cusp heating. Neither TIE-GCM nor IRI-2012 reproduced the strong geomagnetic activity response at ESR, underscoring the need for improvement in both models at polar latitudes.

KW - Ion temperature

KW - EISCAT Svalbard radar

KW - Poker Flat Incoherent Scatter Radar

KW - TIE-GCM

KW - IRI

KW - International Polar Year

U2 - 10.1051/swsc/2016029

DO - 10.1051/swsc/2016029

M3 - Journal article

VL - 6

JO - Journal of Space Weather and Space Climate

JF - Journal of Space Weather and Space Climate

SN - 2115-7251

M1 - A35

ER -