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Bulk transfer coefficients of the atmospheric momentum and sensible heat over desert and gobi in arid climate region of Northwest China

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Science China Earth Sciences 2002年第5期45卷 468-480页

作者：张强卫国安黄荣辉曹晓彦 Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

By utilizing the data of the intensive observation period (May-June, 2000) of Dunhuang land-surface process field experiment that belongs to 'Land-atmosphere Interactive Field Experiment over Arid Region of Northwest China', the bulk momentum transfer coefficient Cd and bulk sensible heat transfer coefficient Ch between surface and atmosphere over desert and gobi in the arid region are determined according to three different methods. The result shows that, though these bulk transfer coefficients are different, they are in the same order. Especially, the means of Cd and Ch are close. Moreover, through analyzing the wind direction, the interference of the building near the observational station with the data is eliminated. From this, the relation between the bulk transfer coefficients and the bulk Richardson number and the range of the typical values of the bulk transfer coefficients over desert and gobi in the typical arid region are obtained.

关键词： desert and gobi, bulk transfer coefficient, bulk Richardson number, interference of building.

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The first discovery of the middle Lochkovian (Devonian) conodonts in South gobi, Mongolia

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Science China Earth Sciences 2005年第1期48卷 48-52页

作者： Ch.Minjin W.Ziegler J.Munchtsetseg J.Gereltsetseg J.Undarya Mongolian University of Science and Technology Senckenberg MuseumMongolian University of Science and TechnologyMongolian University of Science and TechnologyMongolian University of Science and Technology School of Geology46/520UlaanbaatarMongoliaSenckenberganlage 25D-60325Frankfurt/MGermanySchool of Geology46/520UlaanbaatarMongoliaSchool of Geology46/520UlaanbaatarMongoliaSchool of Geology46/520UlaanbaatarMongolia

The Tsagaanbulag Formation of the Ulaan-Shand section in the Shine Jinst area was assigned to Silurian (Wenlock-Pridoli) previously. But the present authors have found some very important conodonts, including Lanea omoalpha, Amydrotaxis johnsoni, "Ozarkodina"planililingua, Pedavis sp., from the Tsagaanbulag and Amansair formations, clearly indicating that these two formations should be assigned to middle Lochkovian which are widely distributed in China and Mongolia. The existence of the marine Wenlockain and early Ludlovian deposits in Mongolia is a noteworthy problem.

关键词： Tsagaanbulag Formation, conodonts, middle Lochkovian, South gobi, Mongolia.

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