搜索结果: 1-4 共查到“地球物理学 Advances”相关记录4条 . 查询时间(0.75 秒)
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Science Advances:中奥陶世生物大辐射的触发机制——来自L型球粒陨石的证据(图)
Science Advances 中奥陶世生物大辐射 触发机制 L型球粒陨石 证据
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2019/12/4
关于奥陶纪生物大辐射事件(GOBE)的成因,目前存在两种观点。一种观点认为中奥陶世动物群落和气候的变化与一颗直径约150 km的L型球粒陨石母体(LCPB)的裂解有关。而且,这次裂解也是地球过去30亿年来所记录的最大一次陨石裂解事件。中奥陶世沉积物中普遍存在的陨石颗粒(直径1-20 cm)就是这次陨石母体裂解的证据。另一种观点是从牙形石氧同位素古温度计的推算来揭示奥陶纪全球气候表现为一个不断趋冷的...
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【前沿报道】Science Advances:海-气交换不平衡增加冰期海洋碳存储(图)
Science Advances 海-气交换 冰期 海洋碳存储
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2019/10/12
南极冰芯记录显示,冰期大气CO2浓度比间冰期平均低~90ppm(相当于~200Pg C),且CO2的变化与温度变化具有很好的一致性(Lüthi et al., 2008)(图1)。冰期消失的大气CO2去向何处?受哪些机制控制?这些问题一直是古气候学界亟需解决的重大科学问题。海洋碳库储量约为38000 Pg C(3.8×1019g C),相当于大气碳库的60多倍,通过海气交换,海洋生物量的变化以及海...
Recent advances in Earth remote sensing:Fourier Transform Stationary HyperSpectral Imagers
Fourier transform imaging spectrometer stationary Sagnac interferometer spectral calibration hyperspectral remote sensing
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2015/9/7
Future trends for the development of new remote sensing imagers have being defined since the launch of the first Fourier Transform HyperSpectral Imager (FTHSI) on board of DoD technological satellite ...
Advances in seismic monitoring at Deception Island volcano (Antarctica) since the International Polar Year
Volcano monitoring Seismic network Seismic array Deception Island volcano International Polar Year
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2015/8/17
Deception Island is an active volcano located in the south Shetland Islands, Antarctica. It constitutes a natural laboratory to test geophysical instruments in extreme conditions, since they have to e...