To study effects of marine debris distribution and ecological development in science and technology 3u8895

To study effects of marine debris distribution and ecological development in science and technology — people.com.cn original title: tracking marine plastic photograph: Bob Daemmrich said those people will not become plastic ocean issues need to look at the evidence again. At the end of the big island of Hawaii Camillo beach is a distant tropical coast. It has white sand and waves, and can’t reach by land. In fact, Camillo beach has most idyllic tropical beach conditions should have. However, there is an inescapable problem: it is often filled with plastic. In the interaction of ocean currents and local vortex, bottles, nets, ropes, shoes and toothbrush and other garbage washed up here. A study carried out in 2011, the top 30% sand by weight is plastic. It is called the most dirty beaches in the world, and the shocking and intuitive display of human in the end to the global ocean dumping many plastic debris. From the north pole to the south pole, from the surface to the sediment, scientists have found the plastic in every ocean environment. The rest of the human body will rot or rust, but the plastic will last for years, killing animals, polluting the environment, and destroying coastlines. Some estimates show that plastic accounts for 50% to 80% of marine waste. How many plastic if the ocean surface survey plastic is an expensive and difficult work, then carry out investigations in the bottom of the ocean is more difficult: researchers lack deep large area has never been explored from the sample. Even if they were able to investigate all of these areas, they would have to test a large amount of seawater to obtain reliable results because of the low concentration of plastic. Therefore, researchers are forced to estimate and infer. In a paper published last year, from the University of Georgia in Athens on waste management Jenna Jambeck’s team estimated the amount of garbage generated in coastal countries and regions as well as the number of plastic ends up in the ocean. The team obtained data: 4 million 800 thousand to 12 million 700 thousand tons per year. This is roughly equivalent to 500 million plastic beverage bottles. However, her estimates will be lost or dumped in the sea and all of the plastic that has appeared in the coastal area is excluded. In order to solve this problem, some researchers are trawling, can use the net number of plastic drain holes. Last year, Erik, a van, an oceanographer at the Imperial College London in London,, and colleagues published the largest number of such data. They integrate information from the 11854 trawl, creating a "global list of plastic debris floating on or near the surface of the ocean."". The trawl covers every ocean except the North pole. According to their estimates, in 2014 a total of 15 trillion ~ 51 trillion pieces of plastic floating in the ocean, with a total weight of up to 93 thousand ~ 236 thousand tons. These figures, however, show scientists a problem. The estimation of all plastics on the surface of the ocean is only one estimate of the amount of plastic Jambeck enters into the ocean every year相关的主题文章: