Arctic sea ice reaches its minimum each September. September Arctic sea ice is now declining at a rate of 13.3 percentper decade.
1970s
The 1970's was the decade where the first important laws were passed to decrease the amount of water pollution.
Yes, there is floating sea ice in the Arctic; and it's melting!In the 1980s average minimum Arctic sea ice (that is, in the summer) was 7.4 million square kilometers.In the 1990s it was 6.8 million.In the 2000s it was 5.7 million.In 2012 it was 3.41 million, the lowest ever.Scientists used to say the Arctic would be ice free by 2050. Now they think certainly by 2030, and perhaps even by about 2016.The speed of events is why scientists are so worried. The only known way to stop this melt is to cut greenhouse emissions triggering these changes, and there are few signs of that occurring.''This is absolutely the critical decade for action,'' said Australian climate expert Tim Flannery.
A decade lasts on average almost 261 fortnights (almost 522 weeks).
I assume you are looking at bode plots. 20dB per decade means an increase or decrease in signal strength of 20dB for every decade of frequency (10Hz to 100Hz is a decade, 100 Hz to 1000Hz is a decade). This is common talk when discussing filters. If you want further (graphical) explanation, search wikipedia for "bode"
The first important laws to decrease water pollution were passed in the 1970s. This decade saw the introduction of key legislation like the Clean Water Act in the United States, which aimed to regulate and reduce pollution in the nation's waterways.
The price would have been, on average for the decade of the 1950's, 12.2% of the average price today.
The smallest ocean is the Arctic Ocean, which is about 10 times smaller than the Pacific Ocean. The major oceans are Pacific, Atlantic, Indian, Southern (Antarctic) and Arctic. The Southern Ocean is newly defined in the past decade and growing in acceptance.
30 (apex)
Yes.The extent of Arctic sea ice was the second lowest on record, and its volume was the lowest on record.This was announced by the World Meteorological Organisation in January, 2012.In the 1980s average minimum Arctic sea ice was 7.4 million square kilometers.In the 1990s it was 6.8 million.In the 2000s it was 5.7 million.In 2012 it was 3.41 million, the lowest ever.Scientists used to say the Arctic would be ice free by 2050. Now they think certainly by 2030, and perhaps even by about 2016.The speed of events is why scientists are so worried. The only known way to stop this melt is to cut greenhouse emissions triggering these changes, and there are few signs of that occurring.''This is absolutely the critical decade for action,'' said Australian climate expert Tim Flannery.
they make up to 500 trillion per decade
30s