Timelines Variables

The following variables are tracked in Version 6 of the Timelines model.

Adjusted impact Amount of  impact after it has been changed by human activity (typically consumption)
Age Median age of a population, in years
Birth Rate Births per year as a fraction of the population
C Average Consumption per person in a group
Capacity Total amount of ecological resources available to, and used by, a group (see Rtotal)
Cap/p Capacity per person
C-low Simulation that reduces consumption at a roughly constant rate to offset external impact
Consumption Ecological footprint of a group expressed in ecological resources
cum, cumulative Sum of values for a variable as a function of another variable
$ current Monetary value (in U.S. dollars) of something in a given year
Death Rate Deaths per year as a fraction of the population
Ecological footprint Measure of ecological products and services used by humanity, typically expressed as a unit of land area
Ecological resource Unit of ecological footprint corresponding to an average person's annual basic needs
Efficiency, E Variable affecting the distribution of population in a group
Emissions Amount of carbon dioxide equivalent greenhouse gas emitted by humans per year in megatonnes
Epoch Period of time corresponding to when part of a group is in a given phase
Global variable A variable that describes a charcteristic of interest for one or more groups
Green The simulation that is the best match to historical values of global variables before COVID-19 pandemic
Green" The simulation that is the best match to historical values of global variables during COVID-19 pandemic
Group A set of people and their environment with specific population, consumption, and capacity
GWP Gross World Product in U.S. dollars (2010 value unless otherwise indicated)
GWP/p Average GWP per person in U.S. dollars (2010 value unless otherwise indicated)
Happiness, H Life satisfaction of members of a group (on a scale from 0 to 1, typically expressed in %)
Impact Amount of reduction of total ecological resources (Capacity) by a non-human source that is triggered by human activity.
Inflation Ratio of monetary value of something in one year to its monetary value in another year
Life Expectancy, L Expected lifetime (in years) of a person or group born in a given year
Longevity The amount of time until a group consumes its habitat at the current rate.
Max Phase The maximum phase in a group
Min Phase The minimum phase in a group
Mixed group A group resulting from interaction of groups based on maximum weights of population, consumption, and capacity
Needs Maximum ecological resources consumed for basic survival
Normalized Expressed as a fraction of a given value (such as the maximum expected value or value in a given year)
Normalized Population / Nature Sratio / 1.126; also: Sr
P Cumulative population as a function of a variable such as phase (P = E^Phratio - E).
Phase Activity type; each phase is expressed as a fraction of its Sr range
Phase Ratio, Phratio Phratio = (Max Phase - Phase) / (Max Phase - Min Phase)
Pmax Maximum world population as a function of  Sratio
Population The number of individuals (typically people) in a group
Population Efficiency Variable affecting the distribution of population in a group
R Total amount of ecological resources consumed by a group
Rdiff Amount of total wants consumed by a given group
Region An arbitrary collection of resources and people (also group)
Resource Ecological resource
Rs, Habitat Amount of ecological resources remaining in a region or the world, usable by people and other species
Rtotal Capacity
$Convert Global inflation of U.S. dollars, as multiple of a value in 2010
Simulation Set of mathematical projections of observable variables (typically global variables) that define a universe
Sr Normalized Population / Nature
Sratio Ratio of minimum consumption by people (needs) to remaining resources Rs
State The combined characteristics of an entity (such a group) based on the values of a set of global variables
Summed group A group with the sums of interacting groups' population, consumption, and capacity
$T Trillion U.S. dollars
Total consumption Consumption of everyone in a group
Temperature Mean annual global atmospheric temperature anomaly (difference from 1810) in degrees Celsius
Universe, world Theoretical reality defined by a simulation, based on history in the real world
Variable A mathematical quantity whose value is based on the values of other quantities
Wants, Waste Resources consumed for purposes other than needs
Wealth Wealth in U.S. dollars (2010 value unless otherwise indicated)
Wealth/p Average wealth per person in U.S. dollars (2010 value unless otherwise indicated)
Weight Multiplier of a variable used to calculate the value of another variable
Weighted group A group resulting from groups interacting based on weights of population, consumption, and capacity
World group All the people and regions in the world identified as one group
Year Middle of given calendar year (A.C.E.)
 

 

 
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