Jennifer Harden, PhD (Former Employee)
Science and Products
Filter Total Items: 144
Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area
Rates of input, accumulation, and turnover of C differ markedly within soil profiles and in soils with different drainage in the BOREAS northern study area. Soil C storage increases from ∼3 kg C m−2 in well-drained, sandy soils to greater than 100 kg C m−2 in wetlands. Two modes of C accumulation were observed in upland soil profiles. Large annual C inputs (0.06–0.1 kg C m−2 yr−1) and...
Authors
S.E. Trumbore, J.W. Harden
Chemical weathering rates of a soil chronosequence on granitic alluvium: I. Quantification of mineralogical and surface area changes and calculation of primary silicate reaction rates Chemical weathering rates of a soil chronosequence on granitic alluvium: I. Quantification of mineralogical and surface area changes and calculation of primary silicate reaction rates
Mineral weathering rates are determined for a series of soils ranging in age from 0.2-3000 Ky developed on alluvial terraces near Merced in the Central Valley of California. Mineralogical and elemental abundances exhibit time-dependent trends documenting the chemical evolution of granitic sand to residual kaolinite and quartz. Mineral losses with time occur in the order: hornblende >...
Authors
A. F. White, A.E. Blum, M. S. Schulz, T.D. Bullen, J.W. Harden, M. L. Peterson
Effect of timber harvest on soil carbon storage at Blodgett Experimental Forest, California Effect of timber harvest on soil carbon storage at Blodgett Experimental Forest, California
Four plots from a mixed conifer forest were similarly cleared, burned, and replanted at various times over 17 years; a plot logged 79 years before sampling was used as a control. The plots had similar slope (2 to 15%, midslope position), aspect (south to southeast), and soil type (Holland series: mesic Haploxeralf; a Gray Brown Luvisol in the Canadian classification system). Twenty sites...
Authors
T.A. Black, J.W. Harden
Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 laboratory data and notes, Thompson, Manitoba Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 laboratory data and notes, Thompson, Manitoba
No abstract available.
Authors
K. P. O’Neill, J.W. Harden, S.E. Trumbore
Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 field notes, Thompson, Manitoba Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 field notes, Thompson, Manitoba
No abstract available.
Authors
K. P. O’Neill, J.W. Harden, S.E. Trumbore, M.O. Bentley, Gregg Winston, B.B. Stephens, T.A. Black
Soil carbon and nitrogen data set for a soil sequence disturbed by timber harvest, Blodgett Experimental Forest, Georgetown, California Soil carbon and nitrogen data set for a soil sequence disturbed by timber harvest, Blodgett Experimental Forest, Georgetown, California
No abstract available.
Authors
T.A. Black, J.W. Harden
Science and Products
Filter Total Items: 144
Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area
Rates of input, accumulation, and turnover of C differ markedly within soil profiles and in soils with different drainage in the BOREAS northern study area. Soil C storage increases from ∼3 kg C m−2 in well-drained, sandy soils to greater than 100 kg C m−2 in wetlands. Two modes of C accumulation were observed in upland soil profiles. Large annual C inputs (0.06–0.1 kg C m−2 yr−1) and...
Authors
S.E. Trumbore, J.W. Harden
Chemical weathering rates of a soil chronosequence on granitic alluvium: I. Quantification of mineralogical and surface area changes and calculation of primary silicate reaction rates Chemical weathering rates of a soil chronosequence on granitic alluvium: I. Quantification of mineralogical and surface area changes and calculation of primary silicate reaction rates
Mineral weathering rates are determined for a series of soils ranging in age from 0.2-3000 Ky developed on alluvial terraces near Merced in the Central Valley of California. Mineralogical and elemental abundances exhibit time-dependent trends documenting the chemical evolution of granitic sand to residual kaolinite and quartz. Mineral losses with time occur in the order: hornblende >...
Authors
A. F. White, A.E. Blum, M. S. Schulz, T.D. Bullen, J.W. Harden, M. L. Peterson
Effect of timber harvest on soil carbon storage at Blodgett Experimental Forest, California Effect of timber harvest on soil carbon storage at Blodgett Experimental Forest, California
Four plots from a mixed conifer forest were similarly cleared, burned, and replanted at various times over 17 years; a plot logged 79 years before sampling was used as a control. The plots had similar slope (2 to 15%, midslope position), aspect (south to southeast), and soil type (Holland series: mesic Haploxeralf; a Gray Brown Luvisol in the Canadian classification system). Twenty sites...
Authors
T.A. Black, J.W. Harden
Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 laboratory data and notes, Thompson, Manitoba Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 laboratory data and notes, Thompson, Manitoba
No abstract available.
Authors
K. P. O’Neill, J.W. Harden, S.E. Trumbore
Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 field notes, Thompson, Manitoba Boreal Ecosystem-Atmosphere Study (BOREAS) 1993 field notes, Thompson, Manitoba
No abstract available.
Authors
K. P. O’Neill, J.W. Harden, S.E. Trumbore, M.O. Bentley, Gregg Winston, B.B. Stephens, T.A. Black
Soil carbon and nitrogen data set for a soil sequence disturbed by timber harvest, Blodgett Experimental Forest, Georgetown, California Soil carbon and nitrogen data set for a soil sequence disturbed by timber harvest, Blodgett Experimental Forest, Georgetown, California
No abstract available.
Authors
T.A. Black, J.W. Harden
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