Anomalous heating of the polar E region by unstable plasma waves - 2. Theory
Anomalous heating of the polar E region by unstable plasma waves - 2. Theory
复制标题
DOI：
10.1029/ja086ia03p01453
复制
发表时间：
1981-03
影响因子：
--
通讯作者：
J. St.‐Maurice;K. Schlegel;P. Banks
中科院分区：
文献类型：
--
作者：
J. St.‐Maurice;K. Schlegel;P. Banks
我们发现，扰动的高纬度E区的反常电子温度可以用不稳定等离子体波的加热来定量解释。在110公里处测得的电子温度高达1500°K，而不是预期值约300°K。我们用准线性理论表明，在不稳定波中有充足的热源，并且所测得的电子温度分布与修正的双流不稳定性对等离子体波加热的预期形状非常相似。我们发现有更多的热量流向离子气体，但由此产生的对离子温度的影响可能很难测量。我们对波加热速率的最佳估计使我们得出结论，对于45 mV/m或更大的直流电场强度，波加热可以达到焦耳加热的50%。
We have found that anomalous electron temperatures in the disturbed high-latitude E region can be quantitatively explained in terms of heating by unstable plasma waves. The electron temperatures at 110 km have been measured to be as high as 1500°K instead of the expected value of about 300°K. We show by using quasi-linear theory that there is an ample source of heat in the unstable waves and that the measured electron temperature profiles have a shape very similar to what is expected from plasma wave heating by the modified two-stream instability. We find that there is even more heating going to the ion gas, but that the resulting effect on the ion temperature may be difficult to measure. Our best estimate of the wave heating rates leads us to conclude that wave heating can be as much as 50% of the Joule heating for dc electric field strengths of the order of 45 mV/m or greater.