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大气CO2浓度飙升给人类带来严重挑战

新疆时时彩  kejiribaobeijing6yue7ridian (jizhezhangmengran)dangjindaqizhongdeeryanghuatan(co2)nongdu,dadaohenzhangshijianyilaidezuigaozhi。jujinrifabiaozai《dizhixue》qikanshangdeyixiangzuixinyanjiu,kexuejiafaxiandangjindaqico2nongduchaoguoleguoqu2300wanniandezuigaojilu,qieqibiaoshengdesuduyeqiansuoweiyou。

  ziconggongyehuayilai,renleibuduanshengjifazhanxuqiu,wenshiqitidepaifangyuelaiyueqiangjing。zhangqiyanjiubiaoming,cong19shijichukaishi,co2nongdujijushangsheng,zheiyishijiandianjiuzaigongyegemingdeqianhou。muqian,co2beirenweishiwenshixiaoyingzuiqiangdewuranwuzhiyi,erco2nongdushenggaoyuqihoubianhuamiqiexiangguan。muqian,yiyoudezhijiejilukeyizhuisudaojibainianqian,danzaizheizhiqian,qingkuangjiufeichangmohule。kexuejiamenzuanchudebingxin,keyirangrenmen“kan”daoyuanzai270wannianqiandeqingjing——dangshideco2nongduhaibudao300ppm。

  cicizuixinyanjiuzhong,meiguoluyisianneizhoulidaxuedeyanjiurenyuanjiangmuguangtouxianglegengyuandeshijian,zhuisudao2300wannianqian。tuanduitongguoyanjiugudaizhiwudehuashiyihailaishixianzheiyimubiao。yinweidangzhiwushengzhangshi,tamenhuicongdaqizhongxishouco2,zhiwudezuzhihuibaoliumouxiewendingdetantongweisu,youqishitan-12hetan-13。dangzheixiezhiwubianchenghuashihou,kexuejiamenjiukeyiyanjiutongweisudehanliang,yiquedingzhiwushengzhangshideco2nongdu。

新疆时时彩  yanjiutuanduitongguozheiyifangfafaxian,zaizhengge2300wanniandeshijianli,co2nongdudaduozai230ppmdao350ppmzuoyoubodong。zheiyuanyuandiyuxiandaishuiping。yanjiutongshifaxian,zaiguoqudemanzhangsuiyueli,co2nongducongweixiangxinjiangshishicaixianzaisuojinglidezheiyang,rucijuliedipansheng。

  yanjiurenyuanzhichu,zaiguoqu2300wannianzhong,biannuanshijiandouyuco2nongdudeshangshengfuduyouguan,qizhongbaokuofashengzai1500wandao1700wannianqiandezhongxinshizhongqi,yiji300wandao500wannianqiandeshangxinshizhongqi。

  qunian5yue,xiaweiyidemonaluoatianwentaiceliangdeshujuxianshi,co2nongduchuangxiale415.26ppmdexingao,gainongduyeshirenleilishishangzuigao。rujinzheixiangzuixinyanjiu,jinyibuzhengmingledangqianrenleisuomianlintiaozhandeyanzhongxing。

  总编辑圈点

  yuxinguanfeiyanyiqingyiyang,qihoubianhuashiquanqiumianlindelingyigezhongdatiaozhan。cileinantiyougegongtongdian: tamenbingfeijinyingxiangmougediqu、mouyiqunren,erjiangyingxiangquanrenleidemingyun;tongshi,jiejuetamenyouxuyaomeiyigerenguanniandegaibianyijifuzhuxingdong。keyishuo,tamenshiduirenleizhihuidezhenzhengkaoyan。yaoxiangpoti,bixucongduanqilijizhuyizhongtiaotuochulai,yongzhangyuanmuguanghedajuyishiqushenshixianzhuang,xunzhaoyingduicelve,zaihezuozhizhongtuijinwentidejiejue。


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