In this work, the main characteristics of the Qingdao Cold Water Mass were studied by using "the comparison analysis method" based on 1980 temperature,salinity and dissolved oxygen data on the western South ...In this work, the main characteristics of the Qingdao Cold Water Mass were studied by using "the comparison analysis method" based on 1980 temperature,salinity and dissolved oxygen data on the western South Yellow Sea. The formation cause of the water mass was analyzed based on February of 1959 temperature and salinity data for this area and on some other authors’ studies. The results showed that the Qingdao Cold Water Mass has growing and vanishing processes: appears in the last ten days of March; has stable pattern in April; is biggest in its area in May; becomes small in its area in June; vanishes in July. It comes from the northern Shandong Coastal Water and is characterized by low temperature and salinity and high dissolved oxygen. The mass is formed under the joint effects of anticyclonic circulation and solar radiation.展开更多
The Nianchu river valley is main source of grain production in Tibet.Soil erosion and a series of consequences have restricted the sustainable development of economy in the Nianchu river valley.On the basis of the pre...The Nianchu river valley is main source of grain production in Tibet.Soil erosion and a series of consequences have restricted the sustainable development of economy in the Nianchu river valley.On the basis of the present status,harm and factors of soil erosion in the Nianchu river valley ecological reestablishment methods on preventing and controllingsoil erosion are presented.展开更多
文摘In this work, the main characteristics of the Qingdao Cold Water Mass were studied by using "the comparison analysis method" based on 1980 temperature,salinity and dissolved oxygen data on the western South Yellow Sea. The formation cause of the water mass was analyzed based on February of 1959 temperature and salinity data for this area and on some other authors’ studies. The results showed that the Qingdao Cold Water Mass has growing and vanishing processes: appears in the last ten days of March; has stable pattern in April; is biggest in its area in May; becomes small in its area in June; vanishes in July. It comes from the northern Shandong Coastal Water and is characterized by low temperature and salinity and high dissolved oxygen. The mass is formed under the joint effects of anticyclonic circulation and solar radiation.
文摘The Nianchu river valley is main source of grain production in Tibet.Soil erosion and a series of consequences have restricted the sustainable development of economy in the Nianchu river valley.On the basis of the present status,harm and factors of soil erosion in the Nianchu river valley ecological reestablishment methods on preventing and controllingsoil erosion are presented.
