Ocean currents are being hit the brakes

The new observational evidence to support the flow slowed down in the North Atlantic. 

 Ocean Center, British scientists led by Harry L. Bryden research team, according to set up in 2004 in the coast of Africa to the Bahamas Islands (about 25 ° N), row across the North Atlantic surface monitoring instruments information, and over the past 50 years will get an 4 times compared across the data found that: the North Atlantic circulation steering flow (meridional overturning circulation, MOC), in 1957 to 2004 weakened the results published in the journal Nature. 

 Scientists in the 25 ° N cross the Atlantic side of the location, can be observed north of the Gulf Stream , south of the subtropical circulation flow, and the deep south flow figure. Scientists have discovered: Although the north of the Bay down to send to remain stable, but the subtropical circulation flow increase, and reduce the flow of deep, which means that, to the high latitudes of the delivery capacity reduced, thus weakening MOC estimates more than 30%, and among them, MOC 90% of the heat is provided to the North Atlantic, the European Climate Change, which will cast a lot of variables. 

 If the United States Department of Atmospheric Science University of Illinois Professor Michael Schlesinger of the model results: in the next 200 years, 70% of the probability of occurrence of ocean currents to stop, in this century, there are 45 percent, if concerted efforts to comply with the global climate policy, there are still 25 % chance of occurrence. 

 Paleoclimate from the past records of ocean currents to stop the cycle of events could cause further decline in Northern Hemisphere temperatures 10 ℃. Scientists worried that even if the current cycle is slow to stop, but the climate may be an instant change of face, and even though the currents and then restart the entire system non-linear will also not immediately returned to the warmth of the Earth's condition. 

 Nordic scientists are now near Iceland to establish another monitoring array figure, hope to be able to stop before the ocean current was informed as early as step and warning.

2030 climate and agriculture

A climate change mainly to explore the various regions of crop production to adjust the priority of the corresponding studies have shown that in South Asia and southern Africa in the next two decades if not for agriculture to adjust some of their crop yields will be rocked, and the impact of global human food supply. The study of 20 global climate models (global climate model, GCM, also general circulation model) forecast in 2030 the climate variables (temperature and rainfall) and then into the crop as a statistical model (statistical crop model), the forecast 20 years later, the crop yield.



Lobell, who calculated the 12 regional daily famine crop importance (hunger importance, HI). This indicator for the number of undernourished people in the region with the crop in the daily dietary intake rate of the product, it can reflect the local people's dependence on the crop. The researchers of the indicators and crop production is forecast to determine the conditions that should give priority to agriculture and adaptation areas.



Theoretically, these areas, agricultural systems can be improved seeds, better fertilizer, land use and control to improve the situation. Researcher believes that the recent World Bank investment in agriculture more money, Rockefeller and Gates Foundation is committed to improving Africa's seed systems, for agriculture due to climate change should be specific help.