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Research links ancient Southeast Asia megadrought to drying in Africa（图）
ancient Southeast Asia megadrought drying in Africa
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2020/9/11
Evidence found in caves in Laos helps tell a story about a connection between the end of the Green Sahara, when heavily vegetated Northern Africa became a hyper-arid landscape, and a previou...
Sample drying to improve HCHO measurements by PTR-MS instruments: laboratory and field measurements
HCHO PTR-MS laboratory and field measurements
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2010/2/21
A significant improvement in the PTR-MS instrument sensitivity to formaldehyde was obtained by drying the air sample to a dew point of −30 °C using a cold trap to condense and freeze water vapou...
The roles of convection, extratropical mixing, and in-situ freeze-drying in the Tropical Tropopause Layer
extratropical mixing in-situ freeze-drying Tropical Tropopause Layer
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2008/11/24
Mechanisms for transporting and dehydrating air across the tropical tropopause layer (TTL) are investigated with a conceptual two dimensional (2-D) model. The 2-D TTL model combines the Holton and Get...