The first member of the Qingshankou Formation, in the Gulong Sag in the northern part of the Songliao Basin, has become an important target for unconventional hydrocarbon exploration. The organic-rich shale within this formation not only provides favorable hydrocarbon source rocks for conventional reservoirs, but also has excellent potential for shale oil exploration due to its thickness, abundant organic matter, the overall m...

Based on daily precipitation measurements from 271 meteorological stations in northern China during 1960–2011, we found that precipitation amount did not show significant trend ( p = 0.25). To obtain a better understanding of regional precipitation differences, we divided northern China into two regions and five sub‐regions. A wetting tendency was identified for the northwestern of China ( NW ), while a drying tendency was det...