Adirondack lakes , long-term

Figure 10. Temporal patterns in lake-water N03, acid-neutralizing capacity (ANC), base cations (Ca + + Mg2+ + Na+ + K+), S042, and inorganic monomeric aluminum (Al ) at Constable Pond, a long-term monitoring site in the Adirondack Mountains. Trend lines are shown for variables with significant trends (p < 0.10 in seasonal Kendall tau test). Seasonal pattern is typical of Adirondack lakes, with seasonal minima in ANC coincident with seasonal maxima in NOf and Ah. Many Adirondack lakes exhibited upward trends in N03 in the 1980s the primary increase was in episodic N03 concentrations.

Table IV. Trends in N03" Concentrations for Adirondack Long-Term Monitoring Lakes...

Driscoll, C.T. and van Dreason, R. (1993). Seasonal and long-term temporal patterns in the chemistry of Adirondack lakes. Water Air Soil Pollut, 67, 319-344. 

Driscoll, C.T., Postek, K.M., Kretser, W. and Raynal, DJ. (1995). Long-term trends in the chemistry of precipitation and lake water in the Adirondack region of New York, USA. Water Air Soil Pollut.. 85, 583-588. 

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