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It’s official, summer 2020 was the hottest on record in the Northern Hemisphere.The National Oceanic and Atmospheric Administration released their monthly report on global temperatures. August 2020’s temperatures around the world made it the second-warmest August on record behind 2016, and the third-hottest season.Here in the Northern Hemisphere, August set a new record with a temperature departure from average of 2.14 degrees F, beating 2016’s numbers.“The most notable temperature departures from average were observed across Alaska, eastern Canada, the western contiguous U.S., Europe, northern Russia, central South America, Western Australia, eastern Antarctica, and across the North Pacific, the Bering Sea, and the Barents Sea, where temperatures were at least 2.0°C (3.6°F) above average,” NOAA scientists observed.The three-month season, June-August, surpassed the previous global record reached in both 2016 and 2019. This period is winter in the Southern Hemisphere, and they also had warmer weather than normal. Australia also had a drier than usual winter, 31 percent below average for precipitation.Globally, the ten hottest Augusts have all happened since 1998, and the five warmest have happened since 2015.Scientists believe 2020 will very likely rank in the top five warmest years on record.Also noted in the report, arctic sea ice continues to decline. The average Arctic sea ice coverage in August was the third smallest on record, about 29 percent below the 1981-2010 average. 1509

In the 45 weeks since the year began, 43 law enforcement officers across the US have been shot and killed in the line of duty, including a sheriff's deputy responding to a mass shooting at a bar in California this week.The parameters CNN followed in this count are: 273

It looks like TikTok has more competition - this time from Facebook.On Wednesday, Facebook launched Instagram Reels, an app that allows users to record 15-second clips set to music, editing the clips by adding effects and filters.The announcement was posted on blog posts from Instagram and Facebook."Reels gives people new ways to express themselves, discover more of what they love on Instagram, and help anyone with the ambition of becoming a creator take center stage," Instagram said in the blog post.The app will be made available to download from the App Store and Google Play Store for free on Monday. 617

Incredible video captured by researchers at Florida Atlantic University captured the blacktip shark's annual migration off Florida’s southeast coast.FAU researchers refer to the blacktip shark's as the "snowbirds of the sea". The sharks migrate south during the cold months and head up north when the weather, and water, start to warm back up. They leave the north when water temperatures drop below 71 degrees Fahrenheit and start heading south.The video was taken by FAU researchers on February 27, right off MacArthur Park in Singer Island.“Last year, we saw a dramatic decline in the number of blacktip sharks that migrated south. In fact, it was so low that we estimated the population to be about one-third of what we have seen in previous years,” said Kajiura, a professor in the Department of Biological Sciences and director of the Elasmobranch Research Laboratory in FAU’s Charles E. Schmidt College of Science. “We want to make sure that these snowbirds come back to South Florida, because if they don’t, it will have a huge ecological impact in this region.”  According to researchers, this year's video off of  MacArthur Park in Singer Island shows dramatically fewer blacktip sharks during migration season as compared to video footage from previous years.       Mary Stringini is a Digital Reporter for ABC Action News. Follow her on Twitter @MaryWFTS. 1450

Incredible video captured by researchers at Florida Atlantic University captured the blacktip shark's annual migration off Florida’s southeast coast.FAU researchers refer to the blacktip shark's as the "snowbirds of the sea". The sharks migrate south during the cold months and head up north when the weather, and water, start to warm back up. They leave the north when water temperatures drop below 71 degrees Fahrenheit and start heading south.The video was taken by FAU researchers on February 27, right off MacArthur Park in Singer Island.“Last year, we saw a dramatic decline in the number of blacktip sharks that migrated south. In fact, it was so low that we estimated the population to be about one-third of what we have seen in previous years,” said Kajiura, a professor in the Department of Biological Sciences and director of the Elasmobranch Research Laboratory in FAU’s Charles E. Schmidt College of Science. “We want to make sure that these snowbirds come back to South Florida, because if they don’t, it will have a huge ecological impact in this region.”  According to researchers, this year's video off of  MacArthur Park in Singer Island shows dramatically fewer blacktip sharks during migration season as compared to video footage from previous years.       Mary Stringini is a Digital Reporter for ABC Action News. Follow her on Twitter @MaryWFTS. 1450

来源：资阳报