Perito Moreno Glacier's retreat accelerates

Key Concepts:

• Glacier recession
• Lateral margin retreat
• Glacier front advance/retreat
• Seasonal glacier dynamics

Glacier Recession Trends

Over the past five years, a noticeable trend of recession has been observed in both the lateral margins of the glacier. The northern margin has experienced a slightly greater rate of retreat compared to the southern margin. However, both margins have receded at a rate exceeding 100 meters per year.

Dramatic Changes in the Glacier Center

The most significant and dramatic changes have occurred in the very center of the glacier. This is highlighted by observations made between the end of the last season (late May) and the start of the current season (mid-July).

Specific Example: Balconies Area

During this inter-seasonal period, the glacier front in the vicinity of the balconies area experienced a substantial advance, measuring at least 150 meters. This indicates a rapid and localized change in the glacier's mass balance or flow dynamics.

Synthesis/Conclusion

The transcript details a concerning trend of glacier recession, particularly emphasizing the accelerated changes occurring at the glacier's center. While lateral margins are receding at over 100 meters per year, the central portion, as exemplified by the balconies area, has shown a dramatic advance of at least 150 meters within a single inter-seasonal period. This suggests complex and potentially rapid shifts in glacier behavior that warrant further investigation.