The Human Impacts Database

A collection of useful numbers for quantifying the impacts of the human presence on Earth.

This quantity is a single measurement of the quantity at a given point in time (1978-2015).


Value:		(5.52 ± 0.17) × 10¹⁰ m² / yr see this value in other units This is equivalent to... (5.52 ± 0.17) × 10⁴ km² / y r (5.52 ± 0.17) × 10⁶ Ha / yr
HuID:		70818
Relevant Year(s):		1978-2015
Summary:		This value is the linear trend calculated from the average annual extents of 1979-2015. These are averaged from four different sea ice measurement products that are all derived from the same raw passive microwave data but use different processing algorithms. Sea ice extent refers to the area containing > 15% ice.
Source:		Josefino C. Comiso, Walter N. Meier, Robert Gersten Variability and trends in the Arctic Sea ice cover: Results from different techniques. Journal of Geophysical Research: Oceans (2017)
Dataset:		Annual sea ice extent loss calculated from 1978-2015 (Comiso2017_table2_processed.csv) global resolution
Added By:		nsarai