Chapter 10: The Santa Ana basin of the central San Bernardino Mountains: Evidence of the timing of uplift and strike slip relative to the San Gabriel Mountains

1993 ◽  
pp. 307-322 ◽  
Author(s):  
Peter M. Sadler
Keyword(s):  
Strike Slip ◽  
San Bernardino Mountains ◽  
San Gabriel Mountains ◽  
Santa Ana ◽  
San Bernardino

Antioxidants and Protective Pigments ofPinus ponderosaNeedles at Gradients of Natural Stresses and Ozone in the San Bernardino Mountains in California

1999 ◽  
Vol 31 (sup1) ◽  
pp. 113-120 ◽  
Author(s):  
Michael Tausz ◽  
Andrzej Bytnerowicz ◽  
Michael J. Arbauch ◽  
Wilfried Weidner ◽  
Dieter Grill
Keyword(s):  
San Bernardino Mountains ◽  
San Bernardino

scholarly journals Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California

2007 ◽  
Vol 7 ◽  
pp. 175-180 ◽  
Author(s):  
Yvonne A. Wood ◽  
Mark Fenn ◽  
Thomas Meixner ◽  
Peter J. Shouse ◽  
Joan Breiner ◽  
...  
Keyword(s):  
Southern California ◽  
Mediterranean Climate ◽  
Rapid Change ◽  
Soil Surface ◽  
Atmospheric Nitrogen ◽  
Wet Season ◽  
San Bernardino Mountains ◽  
San Bernardino ◽  
Fog Deposition ◽  
Very High

We report the rapid acidification of forest soils in the San Bernardino Mountains of southern California. After 30 years, soil to a depth of 25 cm has decreased from a pH (measured in 0.01 M CaCl2) of 4.8 to 3.1. At the 50-cm depth, it has changed from a pH of 4.8 to 4.2. We attribute this rapid change in soil reactivity to very high rates of anthropogenic atmospheric nitrogen (N) added to the soil surface (72 kg ha–1 year–1) from wet, dry, and fog deposition under a Mediterranean climate. Our research suggests that a soil textural discontinuity, related to a buried ancient landsurface, contributes to this rapid acidification by controlling the spatial and temporal movement of precipitation into the landsurface. As a result, the depth to which dissolved anthropogenic N as nitrate (NO3) is leached early in the winter wet season is limited to within the top ~130 cm of soil where it accumulates and increases soil acidity.

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