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class="ss"><div><span>导读： </span>大气现象的其中一个最迷人的地方就是极光，据俄罗斯《论据与事实》报12月21日消息，日本九州大学和京都大学的科学家称，已发现极光亮度和其舞动火焰变化的奥秘。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><DIV><SPAN style="FONT-FAMILY: 仿宋_GB2312; BACKGROUND: white; FONT-SIZE: 14pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"> <P align=center><A href="http://www.oecr.com/data/attachment/portal/201512/25/210759jwcnfjszcsfrsgwg.jpg" target=_blank><IMG src="http://www.oecr.com/data/attachment/portal/201512/25/210759jwcnfjszcsfrsgwg.jpg"></A></P></SPAN> <P style="TEXT-INDENT: 21pt; MARGIN: 12pt 0cm"><SPAN style="FONT-FAMILY: 仿宋_GB2312; BACKGROUND: white; FONT-SIZE: 14pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">大气现象的其中一个最迷人的地方就是极光，</SPAN><SPAN style="FONT-FAMILY: 仿宋_GB2312; FONT-SIZE: 14pt">据俄罗斯《论据与事实》报<SPAN lang=EN-US>12</SPAN>月<SPAN lang=EN-US>21</SPAN>日消息，日本九州大学和京都大学的科学家称，已发现极光亮度和其舞动火焰变化的奥秘。<SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></SPAN></P> <P style="TEXT-INDENT: 21pt; MARGIN: 12pt 0cm"><SPAN style="FONT-FAMILY: 仿宋_GB2312; BACKGROUND: white; FONT-SIZE: 14pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">在此之前人们已经知道，在北极地区，天空经常被绚丽的绿色、紫色和金色反射光照亮，这些就是北极光。北极光是由于太阳喷射的带电粒子撞击到地球的大气层上而引起的一种光学效应。大气层受到太阳发射出的带电粒子的冲击而引起大规模放电，一些粒子被地球的磁场的影响，跑进大气层，这些粒子与不同的分子相碰撞，就发出了不同光彩的光。例如，<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>与大气顶层中的氮相碰，就产生了紫光，但当他们与低层的大气相关遇，就会产生红光。 <SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P style="TEXT-INDENT: 28pt; MARGIN: 12pt 0cm; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 仿宋_GB2312; BACKGROUND: white; FONT-SIZE: 14pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">日本的科学家们称，当太阳射来的电子和地球磁场相互作用时，粒子流发生卷曲变成螺旋状，并在两极上空形成电流。当电流聚集起来时，高层大气的电场也扩散开来。这将会导致处于低空的等离子体发生旋转。太阳风将会破坏地球磁感线的完整性，那些没有进入到主电流的粒子和氮分子以及氧分子进行撞击并发生爆炸。在这种情况下，大气层中的粒子会发出更明亮的光，正是这一过程形成了北极光。极光现象的实质至今才被发现。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P style="TEXT-INDENT: 21pt; MARGIN: 12pt 0cm; WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"><SPAN style="FONT-FAMILY: 仿宋_GB2312; BACKGROUND: white; FONT-SIZE: 14pt; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">大自然的造化神工令人叹为观止！<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P></DIV></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?E5r" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=3795&hash=3492dd027295776ebe6051859778699b&handlekey=clickhandle" id="click_aid_3795_1" 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