geography 102

a bit saturated in brain, so how about something fun. i quite proud of it :-), even used a virtual shovel to dig a couple of very important channels. Amazingly, a certain strait is missing!

ps- oh, colorscale + contours are in unit [km]. For completeness, i should really put lat/lon contour, but too tired… and too late. those text labels took ages.
ps2- don’t be alarmed by the 2-headed greenland, i see it all the time.

About thả diều
writing-challenged opera-addict

11 Responses to geography 102

  1. yvette says:

    Did you plan this ‘just’ for me… I am hooked!! Got to the bird game… cannot stop playing! nice picts too and I love it!!! thanks so so much ! Have a good day too!

  2. Anik LaChev says:

    wow, this is stunning! thank you for sharing 😀

    (and I never knew there were so many other Straits!)

  3. earwormopera says:

    Apologies if this is a dumb question – the map shows depth?

    • thả diều says:

      hi Yvette and Anik : – ) .
      @Anik: actually i didn’t label all the straits, there many within the canada archipelago
      @Charlotte: yes, sea floor depth, jargon = bathymetry. dark patch = land. gray patch = 0-500m. color = 500m-3000m. white = deeper than 3000m. Contours: within gray patch @ 200m; within color at 1000, 1200, 2000, 3000m; within white area @ 3500 and 5000m. Consensus is that i’ll put lat/lon contours on for it to be useful to everyone, so will update at some point this weekend (putting them on are easy, just that i’ll have to label eerything again…) . I find it amazing the shallow ridges (greenland-iceland-faroe-scotland) separating the deep basins to the north and south. did you know it’s one of the most-studied ridge systems in the world?

      ps- when i was little, i was always staring at world map. now countries are just “mask”.

      • earwormopera says:

        Cool! Thanks for the explanation. I didn’t know that that was one of the most-studied ridge systems in the world – but now I do 🙂 Why is it studied in particular?

      • stray says:

        Fun to look at on Google Maps as well (when at work we get bored with using it for what we’re supposed to be using it for).

      • thả diều says:

        kept meaning to answer, but every time i was about to, i stumbled onto yet another 20pg article describing the region, and then after that, the reference section points to yet _more_ long articles…
        i didn’t know this ridge system until a month ago 😀 . such is a problem with trying to do science while learning on the fly. but since ship time, i ‘ve relocated brain from Arctic-centric to NordicSea-centric. At risk of sounding totally incompetent, i’ll try summarize in a few sentences the importance of that ridge system to the _world_ ! but before that, i think 1 additional picture is useful to give the picture/setting. (locate Greenland and Iceland on left, then spot NADW–north atlantic dense water–formation, then track its flow south across the ridge into rest of ocean…)
        Essentially, the water that fills up the world ocean at depth ~1000-5000m has its source in the Seas surrounding Greenland and Basins in the Nordic Seas north of that ridge system. Given that the ridges are so shallow, only certain heavy water but “light” enough to pass the ridges can make it south. So tracking what is passing through there give you a very good idea how much “dense (heavy, cold, salty)” water supplies the rest of the ocean. The big picture circulation is described in that royalsocietypublishing pix: surface flows bring warm water north along northern europe, return flow takes cold water south along ocean bottom. so in big picture, it’s also very important for maintaining heat transporting balance. if you remember that hollywood movie “day_after_tomorrow”, it’s referring to this circulation – leave it to hollywood to dramatize “disaster” that can occur when this circulation is “stopped” :-).

  4. Eyesometric says:

    I’ve been looking at this for days now ( I love maps ) and cannot think of a single intelligent thing to say apart from I can appreciate how much hard work has gone into the production. Well done you!!

    • thả diều says:

      about my reaction to a sheet of music? 😀
      actually as a wanna-be oceanographer, i’ve been doing a lot of readings… and then these maps are really great, because you actually “see” the flow in the ocean on the map; they (flows) are almost entirely controlled by the bottom depth, especially true when you migrate toward the poles!

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