scholarly journals Climate controls on temporal variability of methane flux from a poor fen in southeastern New Hampshire: Measurement and modeling

1994 ◽  
Vol 8 (4) ◽  
pp. 385-397 ◽  
Author(s):  
Steve Frolking ◽  
Patrick Crill
1993 ◽  
Vol 71 (8) ◽  
pp. 1056-1063 ◽  
Author(s):  
J. Bubier ◽  
A. Costello ◽  
T. R. Moore ◽  
N. T. Roulet ◽  
K. Savage

Fluxes of methane were measured by a static chamber technique at hummock, hollow, and lawn microtopographic locations in 12 peatland sites near Cochrane, northern Ontario, from May to October 1991. Average fluxes (mg∙m−2∙d−1) were 2.3 (SD = 1.9) at hummocks, 44.4 (SD = 49.0) at hollows, and 15.6 (SD = 12.9) at lawns. Methane flux was negatively correlated with average water table position based on the 36 locations (r2 = 0.649, p < 0.001), with hummocks having a smaller flux than hollows or lawns, where the water table depth was < 25 cm. Peat samples from a bog hummock and hollow failed to produce methane during anaerobic incubations in the laboratory; samples from a poor fen hollow produced < 1.4 μg∙g−1∙d−1. The production decreased with depth but was greater than the rates observed during the incubation of samples from an adjacent hummock. Rates of methane consumption during aerobic incubations ranged from 1 to 55 μg∙g−1∙d−1 and were greatest in the surface layers and decreased with depth. Differences in methane emissions between hummocks and hollows appear to be controlled primarily by greater methane production rates in hollows compared with hummocks. Of secondary importance are the capacity of the peat profiles to consume methane during its transport to the peat surface and warmer temperatures at the water table beneath hollows compared with hummocks. Key words: peatlands, methane, bog, fen, decomposition.


2015 ◽  
Vol 120 (5) ◽  
pp. 819-831 ◽  
Author(s):  
J. P. Goodrich ◽  
D. I. Campbell ◽  
N. T. Roulet ◽  
M. J. Clearwater ◽  
L. A. Schipper

1999 ◽  
Vol 27 (2) ◽  
pp. 204-205
Author(s):  
Megan Cleary

In recent years, the law in the area of recovered memories in child sexual abuse cases has developed rapidly. See J.K. Murray, “Repression, Memory & Suggestibility: A Call for Limitations on the Admissibility of Repressed Memory Testimony in Abuse Trials,” University of Colorado Law Review, 66 (1995): 477-522, at 479. Three cases have defined the scope of liability to third parties. The cases, decided within six months of each other, all involved lawsuits by third parties against therapists, based on treatment in which the patients recovered memories of sexual abuse. The New Hampshire Supreme Court, in Hungerford v. Jones, 722 A.2d 478 (N.H. 1998), allowed such a claim to survive, while the supreme courts in Iowa, in J.A.H. v. Wadle & Associates, 589 N.W.2d 256 (Iowa 1999), and California, in Eear v. Sills, 82 Cal. Rptr. 281 (1991), rejected lawsuits brought by nonpatients for professional liability.


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