If funds are forthcoming, the team will visit them all in the coming months to gather first-hand data on tree deaths.
With the family-tree data, they were able to identify nearly 50 men and women who participated in genetic studies.
Those worried that undue weight is being put on data from the tree rings of a dozen larches on the Yamal peninsula in Siberia, a topic that exercises Mr McIntyre, will be interested to see that some climate scientists shared some of their worries.
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The HDI Tree aggregates data in the Human Development Index graphically instead of numerically.
Additionally, the authors specifically excluded data, such as tree ring examinations, that have proved controversial in recent years.
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Tree ring data from Patagonia in South America show cold periods from 1270 to 1380 and from 1520 to 1670.
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In fact, a recent study conducted by German researchers using tree ring data reveals that 2, 000 years ago Romans wore cool togas with good reason.
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After using the Ancestry app on my iPad and adding records to my family tree, I easily synced that data with my desktop software by clicking a top-right button when I next opened the Family Tree Maker.
Yet, data science belongs to a family tree of business practices that for over a century have been governed by technocrats who view organizations as machines, desiring to automate everything and eliminate people wherever possible.
In North America, Laki has been blamed for the starvation of Inuit populations from severe cold in northwestern Alaska, based on Inuit oral history as well as tree-ring density data investigated by Gordon Jacoby and others, who estimated that conditions were about 4 degrees Celsius colder than the mean.
When they got a match to a surname, the researchers ran numerous Internet searches to collect data on each individual's family tree, including obituaries, which often list the names of a deceased's family members.
People on the ground can also use a geographical information system that displays farmer contact data, farm size and location, tree inventory and price information, which makes it easier to forecast and optimize cashew collection.
To calculate this, the team took data from patches of forest studied on the ground, in which every tree's diameter has been recorded, and combined them with images from MODIS and with data from an instrument called GLAS, which bounced laser beams off the Earth's surface between 2003 and 2009.
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Such genealogy sites, which people join in hopes of compiling their family tree, sometimes include Y chromosome data because it is passed from father to son and can be traced back generations.
Since I last tested Ancestry in 2006, the company has revamped its desktop software program, Family Tree Maker, so the program can synchronize with Web-based data on Ancestry.com.
Data going back further than a century or two is derived from "proxy" indicators such as tree-rings and stalactites which, again, are subject to large errors.
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Users who have spent years on Family Tree Maker software, which has been around for 23 years, will be able to sync data from their PCs to the Web version of their family trees.
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