Abstract The comparison between reconstructed paleocurrent data from eolian dune deposits and models for atmospheric circulation shows that a monsoonal circulation pattern operated in the low latitudes of Gondwana until the Hauterivian. Trade winds from the Northern Hemisphere crossed the Equator and were re-oriented to the south, shifting the Intertropical Convergence Zone to paleolatitudes around 25° S, where the convergence with westerlies winds occurred. The rupture of the monsoonal pattern and the establishment of a zonal pattern, characterized by dry trade winds blowing to NW in the low latitudes of Gondwana, occurred in the Barremian as a result of the fragmentation of Gondwana.

中文翻译：

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早白垩世冈瓦纳西部盛行地表古风变化

摘要 风成沙丘沉积物重建的古洋流数据与大气环流模型的比较表明，在冈瓦纳低纬度地区运行至豪特里维阶的季风环流模式。来自北半球的信风穿过赤道并重新转向南方，将热带辐合带转移到南纬 25 度左右的古纬度，在那里与西风会合。由于冈瓦纳大陆的分裂，在巴雷米亚发生了季风模式的破裂和带状模式的建立，其特征是干燥的信风在冈瓦纳低纬度地区吹向西北。