IRI-2007 model overestimates electron density during the 23/24 solar minimum
IRI-2007 model overestimates electron density during the 23/24 solar minimum
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DOI：
10.1029/2010gl045430
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发表时间：
2010-12-01
影响因子：
5.2
通讯作者：
Xiong, C.
中科院分区：
文献类型：
--
作者：
Luehr, H.;Xiong, C.
我们比较了2000-2009年国际参考电离层（IRI-2007）模型与卫星CHAMP和GRACE的现场测量的电子密度预测。轨道平均的电子密度被认为是。在这一时期的前半期（2000-2004年），在两个采样高度上，测量值和配置模式预测值相互跟踪得相当好。从2005年起，模型对电子密度的高估逐渐增加。年平均值显示，IRI-2007的数值过高，2008年高出50%，2009年超过60%。对纬度和当地时间分布的检查表明，过高的预测主要发生在白天的低纬度。通过与观测结果的比较，很明显IRI-2007严重高估了上次深太阳极小期期间的赤道离子喷泉效应。引文：Luhr，H.，和C. Xiong（2010），IRI-2007模型高估了23/24太阳极小期的电子密度，Geophys。保留信函：37，L23101，doi：10.1029/2010GL045430。
We compare electron density predictions of the International Reference Ionosphere (IRI-2007) model with in-situ measurements of the satellites CHAMP and GRACE for the years 2000-2009. Orbital-averages of the electron density are considered. During the first half of the period (2000-2004) measurements and collocated model predictions track each other reasonably well at both sampling heights. From 2005 onward the overestimation of the electron density by the model is progressively increasing. Annual averages show that IRI-2007 values are too high by 50% for 2008 and by more than 60% by 2009. An inspection of the latitudinal and local time distributions reveals that the too high predictions primarily occur at low latitudes during daytime hours. From comparison with observations it becomes obvious that IRI-2007 is strongly overestimating the equatorial ion fountain effect during the last deep solar minimum. Citation: Luhr, H., and C. Xiong (2010), IRI-2007 model overestimates electron density during the 23/24 solar minimum, Geophys. Res. Lett., 37, L23101, doi:10.1029/2010GL045430.