Ocean Cover and Hypsometry

What percent of the Earth is ocean? We can figure that out by continuing from here. Run:

> awk '$3>0{print 0" "$4}$3<=0{print 1" "$4}' i.csv > x.csv
> awk '{T[$1]+=$2;S+=$2}END{print T[0]/S" "T[1]/S}' x.csv

0.290505 0.709495

The answer is 70.95%.

We can also generate a hypsometric curve:

> cat i.csv | awk '{print $3" "$4}' | sort -rn > hypso.raw
> awk '{T[$1]+=$2;S+=$2}END{for (i in T){print i" "T[i]}}' hypso.raw | sort -rn -k 1.1 > hypso.dat
> awk '{N+=$2;printf "%d %30.28f\n",$1,N/510065728777854.5264}' hypso.dat > hypso.csv

To plot this curve, create an empty file called hypso.plot and paste text below:

set term png size 740,370
unset key
set xtics 0.1
set mxtics 2
set grid mxtics xtics ytics
set xrange [-0.01 to 1.01]
plot "hypso.csv" u 2:1 w filledcurves above y=0 fc "orange",\
     "hypso.csv" u 2:1 w filledcurves below y=1 fc "blue"

Make sure you have gnuplot.

> sudo apt install gnuplot

Generate an image with:

> gnuplot hypso.plot > hypso.png

You should get:

Earth Hypsometry (meters)

Enjoy 🙂 -Zoe

11 thoughts on “Ocean Cover and Hypsometry

  1. If I may comment on the graph above — about 60% of Earth surface lies below 2km of its mean. If there is a correlation of the crust thickness and its corresponding heat transfer rate from the “hot” Earth core, here we could deduct a compelling scenario — most of Earth heat comes from below (the surface) — does anyone make any effort to measure this quite likely phenomenon?
    You, Zoe, made a meticulous analysis of world’s surface drilling sites, yet there is no equivalent of under-sea data set! I bet my balls on this — there is much higher heat transfer down there, than one could ever imagine.
    IMHO, that should be the target of funding, not this bogus GHG theory…

    Liked by 1 person

    1. Thank you very much, JaKo.
      I don’t know if you’ve seen the thermocline curve. Many scientists believe it’s created top-down due to solar radiance and tidal sloshing. I believe that that is a huge mistake. I think it is created bottom-up due to fluid density dynamics PLUS solar radiance sprinkled on top. This is will not be easy to prove. I need help. I need a FLIR camera looking at a see-through container as water (heated from the bottom) inside it boils. My theory is that it gets hotter at the top first – even though the heat came from the bottom. If this is true, then the thermocline can be easily explained. The tidal sloshing thing is so stupid – tides slosh only the top few meters.

      I’m honestly surprised academia is so incredibly stupid. Why is it my responsibility to do basic science?


      1. Last thing first:
        I’ve been among them in Dept. of Chemical Engineering of a 20k+ student university for a “generation” — they’re not stupid, they’re lazy and very “pragmatic” — do what works and generates funding and not what is important.

        I think the thermocline could stay as is, we could even put aside the localized thermal vents. What I would suggest is to drill around the mean depth (~3.7km) to the same extra 50 and 100m and get that heat flux. If that turns out to be some double of that is on the dry land, you’re in business — you had proven that GHG theory is indeed a hoax. The temperature of the bottom (boundary) wouldn’t need to change more than a fraction of K — that would also be a proof of that if something is small it doesn’t mean it is not important…

        Liked by 1 person

        1. Thanks, JaKo.
          The bottom of the ocean already has ~double the flux. That’s in the Davies & Davies (2013) paper referenced in my article The case of two different fluxes.

          Yeah, I would like to show that geothermal is the only valid explanation. It’s the only one that makes sense. Too bad Fourier discounted it before measurements were even available. What an ass.


        2. Hi Zoe,

          What I hoped for was more than double;( also D&D paper was not very much forthcoming with actual data…

          You have a wonderful 2020, in my age we usually wish each other a good health, while you may settle for happiness;-)

          Cheers to New Year,



  2. This theory has the basis to cause a huge difference to genuine climate skeptics. Not so much to the vast majority of climate scientists and politicians, who are unlikely to admit they have been fools all along.

    I have long dismissed the crap theory that 33 degrees of earths warmth comes from CO2. Where is that toasty warmth on a cloudless winter night?

    Well done Zoe! Love your posts.

    By the way, regarding your previous posts on the earth’s surface—surely the fractal nature of the land’s surface increases the heat dissipation from the surface due to the geothermal source. Could be significant.

    Liked by 1 person

    1. Thanks.
      Yes surface roughness I imagine would do that if geothermal gradient continued inside it.

      /\ – mountain
      /\ – if geothermal gradient was like this inside it then definitely
      __ – if like this on the bottom then probably less would go out

      This question is too hard. Not sure if we have such data all over the globe.


  3. Hi Zoe,
    Have you managed to get use of a FLIR cam yet? If not, there’s plenty of videos online showing (no surprise) your thesis to be exactly correct. Top region heats first, container walls follow, air above rises faster than water below.

    If you’re familiar with the windmap site – earth.nullschool.net – put two browsers side by each, one showing the Air Temp and the other showing Sea Surface Temp – notice that everywhere one checks, SST is always warmer than air temp, especially under ice covered ocean.

    Liked by 1 person

  4. This is the right site for everyone who would like to find out about this topic. You realize so much its almost tough to argue with you (not that I actually would want to…HaHa).
    You certainly put a fresh spin on a topic that’s
    been discussed for many years. Excellent stuff, just excellent!

    Liked by 1 person

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