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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">NASA追踪地球磁场中奇怪“凹痕” 卫星“路过”该区域或致损毁 </h1> <p class="xg1"> 时间：2020-8-20 11:36<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(934)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=8644&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: 网络平台</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>美国国家航空航天局（NASA）科学家近日发布研究报告称，其发现并追踪到地球磁场中的一个奇怪“凹痕”，该凹痕正在缓慢向西移动，穿过南美洲和南大西洋，对“路过”该区域的卫星造成威胁，科研团队建议长期观测并建立 ...</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> 据未来主义科学网站报道，美国国家航空航天局（NASA）科学家近日发布研究报告称，其发现并追踪到地球磁场中的一个奇怪“凹痕”，该凹痕正在缓慢向西移动，穿过南美洲和南大西洋，对“路过”该区域的卫星造成威胁，科研团队建议长期观测并建立预报机制。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202008/20/113629k1vvot0ot59tgvo3.png" target="_blank"><img src="data/attachment/portal/202008/20/113629k1vvot0ot59tgvo3.png"></a></p></div><div><br></div><div> 地球磁场是地球的保护伞，可以保护地球生物免受来自太阳高带电粒子（俗称太阳风）产生的危害。</div><div><br></div><div> 科学家注意到，受该“凹痕”影响，地球磁场的保护作用在南大西洋上空的特定区域被明显削弱，并已持续一段时间。科学家们将该现象命名为“南大西洋磁异常区（SAA）”现象。近日，研究者发现该异常区域正在逐步向西移动，NASA的报告<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>该区域已经分裂成两个裂片。</div><div><br></div><div> 报告认为，此“凹痕”是由猛烈的太阳风暴致使范艾伦辐射带变形所致。范艾伦辐射带是环绕地球的高能粒子辐射带，可以捕获带电粒子。</div><div><br></div><div> 对此，来自戈达德<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测量</a>和地球<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>实验室的地球物理学家、数学家匡伟佳（音）在报告中给出了解释：“极性相反的局部电场在SAA区域迅速增强，导致此区域场强相较于周边区域明显变弱，是出现磁场‘凹痕’的主要原因。”</div><div><br></div><div> 地球磁场空间的减弱，可能导致经过SAA区域上空的卫星暴露在带电粒子环境和较高程度辐射，给卫星带来损伤。最严重的情况是，带电粒子会导致卫星<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电路</a>系统短路并摧毁整个卫星。</div><div><br></div><div> 这也正是NASA科学家团队正在密切关注这个移动中的“太空坑洞”的主要原因，他们希望通过建立长期相关预报来进一步关注并了解它的变化。</div><div><br></div><div> “尽管SAA移动非常缓慢，但它的形态正在发生一些变化，因此对它进行持续的关注非常必要，这有助于我们尽快建立分析模型并进行准确预测。”来自NASA戈达德太空飞行中心的地球物理学家特瑞·萨巴卡如是说。</div><div><br></div><div><p 255);"="" center;="" center;"="" 255);="" 255,="" rgb(255,="" simsun;="" yahei",="" microsoft="" 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