Arctic Ice Melt Could Pause for Several Years

Although Arctic sea ice appears fated to melt away as the climate continues to warm, the ice may temporarily stabilize or somewhat expand at times over the next few decades, new research indicates.The computer modeling study, by scientists at the National Center for Atmospheric Research, reinforces previous findings by other research teams that the level of Arctic sea ice loss observed in recent decades cannot be explained by natural causes alone, and that the ice will eventually disappear during summer if climate change continues.

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satellite-based crop estimation in India

For the first time, the Indian Sugar Mills Association (Isma), along with the National Federation of Cooperative Sugar Factories (NFCSF), is working to gather data on sugarcane acreage and yield with the help of satellite mapping. The process will start for the standing sugarcane crop which will be crushed in the new season beginning October. The two apex sugar bodies will do this every year from now.

In the past, the government output estimates have shown high divergence from the actual output, thereby affected the industry’s profitability. Isma and NFCSF have invited proposals from about a dozen such agencies in the country and are in the process of selecting one. They plan to hire an agency with remote-sensing background to gather acreage mapping with satellite images that can be compared and analysed with the field data collected from various sugar mills.

The industry associations have felt a need for conducting satellite surveys along with field visits to get the accurate estimates on crop. In the past, satellite-based crop assessment has been tried by some state governments, individual mills and trading houses.

At present, the union agriculture ministry and food ministry compile data on sugarcane production. However, none of the two is backed by technology. While the agriculture ministry relies on data from state agriculture departments, the food ministry depends on feedback from state sugarcane commissioners. Interestingly, at times there is a striking disparity in estimates of both the ministries as well.

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Posted in BIODIVERSITY, GIS, Satellites | 1 Comment

Low Temperatures Devastate Coral Reefs in Florida Keys

Increased seawater temperatures are known to be a leading cause of the decline of coral reefs all over the world. Now, researchers at the University of Georgia have found that extreme low temperatures affect certain corals in much the same way that high temperatures do, with potentially catastrophic consequences for coral ecosystems. Their findings appear in the early online edition of the journal Global Change Biology.

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Japan to map radioactive contaminated farmlands

The Japanese Government will soon draw up a radioactive substance concentration map for farmlands. The government will also conduct a study on contaminated debris as part of measures to deal with radioactive material released from the crippled Fukushima Daiichi nuclear power plant, Mainichi Japan reported. The measures are to be implemented by the end of this year, with government ministries and agencies strengthening cooperation to deal with radiation contamination from the disaster-struck Fukushima No. 1 nuclear power plant. But the government did not show how it will use findings from the study to decontaminate areas near the almost destroyed power plant. According to measures compiled, the Ministry of Agriculture, Forestry and Fisheries will analyse farm land at about 500 sites mainly in Fukushima Prefecture, where the wrecked nuclear plant is located, and draw up a radioactive material concentration map by the end of this month. Also, the Environment Ministry is to check radioactive contaminated debris in the government-declared no-go zone near the plant. And the Ministry of Education, Culture, Sports, Science and Technology will install about 250 devices across Japan to monitor radioactive substances. Currently, there is just one of these devices installed in each of Japan’s 47 prefectures. By increasing the number of devices nationwide, the ministry aims to introduce a system by the end of this year to monitor levels of radioactive substances around the clock and disclose those levels to the public. The ministry also plans to enhance studies of seawater off the coasts of Fukushima, Miyagi and Ibaraki prefectures in cooperation with the Fisheries Agency and the Japan Coast Guard.

 Source:GISDevelopment.net

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