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class="ss"><div><span>导读： </span>根据发表在《自然》期刊上的一项研究，马里兰大学的研究人员利用卫星成像数据绘制了 1982 年至 2016 年间全球土地覆盖的变化图，发现地球的森林植被覆盖增加了 7% 或 224 万平方公里，亚北极、亚热带和温带出现净增 ...</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> 根据发表在《自然》期刊上的一项研究，马里兰大学的研究人员利用卫星成像数据绘制了 1982 年至 2016 年间全球土地覆盖的变化图，发现地球的森林植被覆盖增加了 7% 或 224 万平方公里，亚北极、亚热带和温带出现净增长；全球裸地覆盖减少了 116 万平方公里，亚洲农业区域的变化最为明显。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201808/10/093322c69qqddcfqlvgrgx.png" target="_blank"><img src="data/attachment/portal/201808/10/093322c69qqddcfqlvgrgx.png"></a></p></div><div><br></div><div> 他们发现这种变化呈现出区域尺度上的差异：山区的林木树冠覆盖增加了，而许多干旱和半干旱系统（包括澳大利亚、中国和美国西南部）的植被覆盖减少了。研究人员判断他们观察到的 60% 的土地变化与人类直接活动有关，40% 是由气候变化等间接驱动因素造成的。</div><div><br></div><div><p microsoft="" 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