Daily Green: The annual melting of Arctic sea ice is trending toward another record-low. While it’s still too early to say whether the 2009 melt will exceed the record 2007 melt — the annual low-point isn’t reached until September — the trend line for 2009 for the first time has dipped below 2007, according to the latest data from the National Snow and Ice Data Center. Another record would be startling, but not surprising. Just 30% of the sea ice in the Arctic at the height of the winter …