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8

You could try building one using a global Digital Elevation Model. There are several freely available like TanDEM-X, SRTM, or ASTER GDEM. You'd have to look for all the pixels containing a negative value. Adjacent negative pixels would give you connected regions below sea level, and you could easily estimate their area just by multiplying the number of ...


3

Caveat: I'm answering this in a popular context. There may be more technical definitions, which I'd be interested in hearing about. It seems to be generally accepted that continents are not, themselves, islands. This is a common confusion in pub quiz questions, where people argue over whether the largest island in the world is Greenland, Australia, or (if ...


1

A very simple answer is that it is related to the demands of the vegetation types and their ability to maximize the net radiation. A "perfect" plant that covered the entire surface would theoretically result in a BR of 0 as 100% of Rn is used for photosynthesis and released as ET, such that H=0 and LE=RN and B=H/L. It obviously doesn't work that way though. ...


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