Regularity of paleowind directions of the Early Cretaceous Desert in Ordos Basin and climatic significance  

作　　者：江新胜 潘忠习 付清平 

出　　处：《Science China Earth Sciences》2001年第1期24-33,共10页中国科学（地球科学英文版）

基　　金：The field work has been guided by Prof. Qi Hua from Xi'an Institute of Geology and Mineral Resources and the indoor work has been supervised by Academician Liu Baojun and Prof. Pan Guitang, Director of Chengdu Institute of Geology and Mineral Resources.

摘　　要：By the measurement of the wind directional indicator of theCretaceous desert in Ordos Basin, the regularity of the paleoprevailing wind directions and pattern of the paleowind belts are revealed. It is considered that the desert was controlled by a planetary wind system. In the early stage, the subtropical high pressure zone drifted south and northwards with short cycles, resulting in the alternation of westerlies and northeast trades; in the late stage, the subtropical high pressure zone drifted southwards with a long cycle, placing the desert under the westerly belt and making the desert completely controlled by the westerly belt. The reconstruction of the paleowind belts has provided the evidence of the general circulation of the atmosphere for the pattern of the circulation before the uplift of the Tibetan Plateau.By the measurement of the wind directional indicator of the Cretaceous desert in Ordos Basin, the regularity of the paleoprevailing wind directions and pattern of the paleowind belts are revealed. It is considered that the desert was controlled by a planetary wind system. In the early stage, the subtropical high pressure zone drifted south and northwards with short cycles, resulting in the alternation of westerlies and northeast trades; in the late stage, the subtropical high pressure zone drifted southwards with a long cycle, placing the desert under the westerly belt and making the desert completely controlled by the westerly belt. The reconstruction of the paleowind belts has provided the evidence of the general circulation of the atmosphere for the pattern of the circulation before the uplift of the Tibetan Plateau

关 键 词：Early CRETACEOUS desert  REGULARITY of paleowind directions  pattern of paleowind belts. 

分 类 号：P532[天文地球—古生物学与地层学]