"What it means
Although not highlighted by Schmidt and Nusser, their results tell a much different story than the now-discredited one that was strongly promoted in the IPCC (2007) Fourth Assessment Report, further attesting to the many excursions from reality found within that pre-settled policy-driven document." Now that
was funny! Probably not true also.
Dave Snope said:
In a rare case of scientists actually doing real long-term measurement studies of glaciers (rather than the common computer simulations or short-time observatons combined with hysterically speculative press releases force-fed en masse to the public) we learn some hard facts about glacier retreat.
What was done
Working in the Nanga Parbat region of northern Pakistan, which constitutes the northwestern limit of the high Himalaya, Schmidt and Nusser used a multi-temporal/multi-scale approach based on historical data, repeat photography and satellite imagery to develop a 70-year history of the behavior of that region's Raikot Glacier.
What was learned
The two German scientists report that visual comparison of repeat photography indicates "relatively small rates of recession and surface changes over the last seven decades," and they say that "in the 1994 image, no significant retreat of the glacier margin can be detected in comparison with 1985." In addition, they state that "given that some well-defined large boulders remain in the same position in 2006 as in 1934, one can assume a high stability of the proglacial area and lateral moraines," which observation, in their words, "casts doubt on the catastrophic break-out flood from four new portals in 1993 or 1994 suggested by Shroder et al. (2000)," which they say their own field visits in 1993, 1994 and 1995 "did not verify."
With respect to glacier-front variations, the pair of researchers finds that "similarly to most debris-covered glaciers in the northwest Himalaya and in the nearby Karakoram, Hindu Kush and Kun Lun ranges, Raikot Glacier shows only minor retreating rates since the 1980s," and they report that "glacier fluctuations over the past 70 years are characterized by retreat between the 1930s and 1950s, a marked advance between the 1950s and 1980s, and a relatively stable situation after 1992," adding that "a general trend of reduced glacier thickness does not appear significant over the whole observation period."
What it means
Although not highlighted by Schmidt and Nusser, their results tell a much different story than the now-discredited one that was strongly promoted in the IPCC (2007) Fourth Assessment Report, further attesting to the many excursions from reality found within that pre-settled policy-driven document.
http://www.co2science.org/articles/V14/N23/C1.php