Wadi Howar: Paleoclimatic Evidence from an Extinct River System in the Southeastern Sahara
Wadi Howar: Paleoclimatic Evidence from an Extinct River System in the Southeastern Sahara
复制标题
瓦迪霍瓦尔：来自撒哈拉东南部灭绝河流系统的古气候证据
DOI：
10.1126/science.237.4812.298
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发表时间：
1987
期刊：
影响因子：
56.9
通讯作者：
S. Kropelin
中科院分区：
文献类型：
--
作者：
Southeastern Sahara;H. Pachur;S. Kropelin
Field research into the climatic history and shifting of the East Saharan desert has furnished evidence that during Quaternary time the present extremely arid western part of Upper Nubia (northern Sudan)was temporarily linked to the Nile by way of a hitherto unknown 400 kilometer long tributary. From about 9500 to 4500 years ago, lower Wadi Howar flowed through an environment characterized by numerous ground water outlets and freshwater lakes. Savanna fauna and cattle-herders occupied this region, which today receives at most 25 millimeters of rainfall per year. At that period the southern edge of the eastern Sahara was some 500 kilometers further north than today and ground water resources were recharged for the last time.
