1. Anyone who understands science does not depend on models this way. Quote:
"We all know the frailty of models concerning the air-surface system."
-- Atmospheric Scientist Dr. Joanne Simpson
2. Your data is old. There is actually an upswing at the end of your graph that is continuing:
Article title: Scientists Are Surprised To Find That One Of The Fastest Shrinking Glaciers Is Growing Again March 25 2019
"The Jakobshavn glacier, located in Greenland, began thinning around 2012 to nearly 130 feet annually. It’s been growing again at about the same rate for the past two years, a study in Nature Geoscience noted. Scientists reacted with surprise, noting that they grew accustomed to the glacier receding."
"The study comes on the heels of research in 2017 showing that some of the largest non-polar glaciers in the world are either stable or growing due to a “vortex” of cold air over a 1,200-mile section of the greater Asia. Climate models have been unable to reproduce the phenomenon, an August 2017 study published in Nature revealed."