Media watch – Thursday

24 January 2019

MediaWatch

Media Watch is a focus on New Zealand media, blogs and social media. You can post any items of interested related to media.

A primary aim here is to hold media to account in the political arena. A credible and questioning media is an essential part of a healthy democracy.

A general guideline – post opinion on or excerpts from and links to blog posts or comments of interest, whether they are praise, criticism, pointing out issues or sharing useful information.

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    • Duker

       /  24th January 2019

      Guess how long they have been able to give Tasman sea surface- by satellite so it doesn’t go down very deep- temperatures?
      Mar 1999.
      Another point is sea temp is warmer during la nina

      I guess those fishes will have to stay below 10m or warmer water fish travel further south

      Reply
      • Griff.

         /  24th January 2019

        Before you start gibbering it is always best to check you actually know what you are talking about rather than blathering rubbish.

        One of the important points to keep in mind is that when we are at the beach, we are sampling only the surface temperature. The same is true of satellites – they monitor less than the top millimetre of the ocean.

        Sea surface temperatures are several degrees above normal at the moment. But in deeper waters, because of the high heat content of water, even a tenth of a degree is significant. Temperature in the deeper ocean is monitored by a network of moored buoys on and off the continental shelf along the Australian coast. New Zealand has almost nothing that would be comparable.

        Measuring temperature in real time

        What we can look to, in the absence of moored buoys, is a fleet of ocean robots that monitor temperature in real time. Argo floats drift with ocean currents, sink to two kilometres every ten days and then collect data as they return to the surface.

        These data allowed us to identify that the 2017/18 marine heatwave around New Zealand remained shallow. Most of the warmer water was in the upper 30 metres. Looking at the present summer conditions, one Argo robot off New Zealand’s west coast shows it is almost four degrees above normal in the upper 40 metres of the ocean. On the east coast, near the Chatham Islands, another float shows warmed layers to 20 metres deep. To the south, the warming goes deeper, down to almost 80 metres.

        Reply
    • Alan Wilkinson

       /  24th January 2019

      Great! Time for a swim. Just had a nice shower of rain to break all the perfect summer sun.

      Reply
  2. Missy

     /  24th January 2019

    Reply
  3. Griff.

     /  24th January 2019

    Reply

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