Stratos wrote on Dec 9
th, 2015 at 4:58pm:
lee wrote Today at 2:50pm:
So early 21st century. Where mine was cherry-picking yours was kosher?
Lee, the paper very clearly has data from before the 21st century. I'm assuming you hadn't read past the abstract when you typed that or something
Yes, from 1600 and from 1850.
lee wrote on Dec 9
th, 2015 at 2:50pm:
'The dataset on glacier front variations ( ~ 42 000 since 1600) delivers clear evidence that centennial glacier retreat is a global phenomenon.'
HMM, How much of the now known world existed in 1600?
Or 42,000 readings in 400 years = 105 avg/year spread across how many glaciers
lee wrote on Dec 9
th, 2015 at 2:50pm:
'Glaciological and geodetic observations
( ~ 5200 (readings) since 1850) show that the rates of early 21st-century mass loss are without precedent on a global scale'
Yep, by 1850 we knew all of the world's glaciers. 5200/160 years = 32.5 readings / year.
Yep, I'm sure I read the paper. Of course you could take it further. From 1850, some of the 2000 glaciers were sampled.
'Table 1. Information on glacier fluctuation datasets. The total number of observations is given together with the spatial and temporal
coverage of the four analysed datasets: front variations (FV) from direct observations (obs) and reconstructions (rec); mass balance (MB) from
glaciological (glac) and geodetic (geod) methods.
For 590 glaciers with no area information available, the average glacier area of the
corresponding observation sample was used for estimating the total area covered.'
So for 590 glaciers with no data, over a quarter of the sample size, they inferred the total area covered.