Effect of solar soft X-rays on the lower ionosphere

被引:74
作者
Solomon, SC
Bailey, SM
Woods, TN
机构
[1] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80301 USA
[2] Hampton Univ, Ctr Atmospher Sci, Hampton, VA 23668 USA
[3] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA
关键词
D O I
10.1029/2001GL012866
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
New measurements of solar irradiance in the soft X-ray region of the spectrum from the SNOE satellite [Bailey et al., 2000] show that the full-disk solar irradiance in the similar to2-20 nm region is higher than a standard model [Hinteregger ct al., 1981] by a factor of similar to4 at all levels of solar activity. This confirms contentions developed from several lines of evidence, [e.g., Richards and Torr, 1984; Richards et al., 1994] but to a larger degree than previously suspected. This finding has many implications for the thermosphere and ionosphere, two of which are examined here. Greatly improved agreement between measurement and model of the photoelectron spectrum is obtained when the solar soft X-ray input is adjusted to the SNOE measurements. We also found good agreement between electron density profiles measured by the incoherent scatter radar at Millstone Hill [Buonsanto et al., 1992] and our model, solving a fundamental problem identified in that work.
引用
收藏
页码:2149 / 2152
页数:4
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