scholarly journals Changing patterns of daily precipitation totals at the Coweeta Hydrologic Laboratory, North Carolina, USA

2017 ◽  
Vol 38 (1) ◽  
pp. 94-104 ◽  
Author(s):  
T. P. Burt ◽  
C. Ford Miniat ◽  
S. H. Laseter ◽  
W. T. Swank
Keyword(s):  
North Carolina ◽  
Daily Precipitation ◽  
Changing Patterns ◽  
Coweeta Hydrologic Laboratory

scholarly journals Long-term temperature and precipitation trends at the Coweeta Hydrologic Laboratory, Otto, North Carolina, USA

2012 ◽  
Vol 43 (6) ◽  
pp. 890-901 ◽  
Author(s):  
Stephanie H. Laseter ◽  
Chelcy R. Ford ◽  
James M. Vose ◽  
Lloyd W. Swift
Keyword(s):  
North Carolina ◽  
Global Climate ◽  
Forest Health ◽  
Monitoring Network ◽  
Drought Severity ◽  
Temperature And Precipitation ◽  
Air Temperatures ◽  
Precipitation Record ◽  
Coweeta Hydrologic Laboratory

Coweeta Hydrologic Laboratory, located in western North Carolina, USA, is a 2,185 ha basin wherein forest climate monitoring and watershed experimentation began in the early 1930s. An extensive climate and hydrologic network has facilitated research for over 75 years. Our objectives in this paper were to describe the monitoring network, present long-term air temperature and precipitation data, and analyze the temporal variation in the long-term temperature and precipitation record. We found that over the period of record: (1) air temperatures have been increasing significantly since the late 1970s, (2) drought severity and frequency have increased with time, and (3) the precipitation distribution has become more extreme over time. We discuss the implications of these trends within the context of regional and global climate change and forest health.

Nutrient leaching from Acerrubrum leaves by experimental acid rainfall

1991 ◽  
Vol 21 (2) ◽  
pp. 222-229 ◽  
Author(s):  
Christopher S. Potter
Keyword(s):  
North Carolina ◽  
Base Cation ◽  
Nutrient Leaching ◽  
Tree Leaves ◽  
Field Site ◽  
Nutrient Pools ◽  
Leaching Losses ◽  
Foliar Nutrient ◽  
Coweeta Hydrologic Laboratory ◽  
Acid Rainfall

Freshly collected Acerrubrum L. leaves from a regenerating forest stand at the Coweeta Hydrologic Laboratory, North Carolina, were washed with experimental acid rainfall (pH 4.6). Nutrient leaching rates from undamaged leaves were significant for SO42−, K+, Ca2+, and Mg2+, whereas NO3−-N was absorbed from rainfall. Significantly greater leaching of SO42−, K+, Ca2+, and Mg2+, and significantly greater absorption of NO3−-N and NH4+-N, occurred in artificially damaged leaves than in undamaged leaves. Comparisons between leaching transfers and foliar nutrient pools showed that base cation (K+, Ca2+, and Mg2+) leaching losses account for up to 25% of foliar pools, whereas absorption of NO3−-N and NH4+-N from precipitation can increase total foliar N by almost 2%. Projected growing season cation leaching losses (expressed as a percentage of foliar pools) from damaged leaves were in agreement with previously reported whole-canopy leaching fluxes based on analysis of throughfall at the field site. These results suggest that nutrient leaching losses from young, rapidly growing tree leaves are lower than previously published leaching fluxes for more mature forest stands.

Predicting daily flows in ungauged catchments: model regionalization from catchment descriptors at the Coweeta Hydrologic Laboratory, North Carolina

2003 ◽  
Vol 17 (11) ◽  
pp. 2219-2238 ◽  
Author(s):  
Teemu S. Kokkonen ◽  
Anthony J. Jakeman ◽  
Peter C. Young ◽  
Harri J. Koivusalo
Keyword(s):  
North Carolina ◽  
Ungauged Catchments ◽  
Coweeta Hydrologic Laboratory ◽  
Daily Flows

Canopy arthropod community structure and herbivory in old-growth and regenerating forests in western Oregon

1989 ◽  
Vol 19 (3) ◽  
pp. 318-322 ◽  
Author(s):  
T. D. Schowalter
Keyword(s):  
North Carolina ◽  
Community Structure ◽  
Functional Organization ◽  
Deciduous Forests ◽  
Forest Conversion ◽  
Arthropod Community ◽  
Old Growth ◽  
Order Of Magnitude ◽  
Coweeta Hydrologic Laboratory ◽  
Eastern Deciduous Forests

This paper describes differences in canopy arthropod community structure and herbivory between old-growth and regenerating coniferous forests at the H. J. Andrews Experimental Forest in western Oregon. Species diversity and functional diversity were much higher in canopies of old-growth trees compared with those of young trees. Aphid bio-mass in young stands was elevated an order of magnitude over biomass in old-growth stands. This study indicated a shift in the defoliator/sap-sucker ratio resulting from forest conversion, as have earlier studies at Coweeta Hydrologic Laboratory, North Carolina. These data indicated that the taxonomically distinct western coniferous and eastern deciduous forests show similar trends in functional organization of their canopy arthropod communities.

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