News

FEATURED NATIONALLY

CZO Ecology Session at ESA 2015 Meeting

16 Jul 2015 - A session entitled 'Ecology in the Critical Zone" will take place at the Ecological Society of America (ESA) 2015 Meeting held  from August...

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Jon Chorover to speak at international workshop on hydro-biogeochemical processes

16 Jul 2015 - Jon Chorover of the Santa Catalina Mountains & Jemez River Basin CZO has been invited to talk at the Hydro-Biogeochemical Processes: Mechanisms,...

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Soil, Not Dirt: A Digital Journey Connecting Soils, Plants, and Climate by Rebecca Lybrand

08 Jun 2015 - Join Rebecca on an exciting GoPro adventure to study soil in the desert, grasslands, and pine forests of Arizona.

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Video: CZ graduate students reflect on experience at University of Western Australia Summer School

13 May 2015 - Students from around the Worldwide Universities Network (WUN) gathered in Perth for two weeks in Feb. 2015 for the Inaugural WUN Summer School.

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Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services

10 Feb 2015 - Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services

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Predicting post-wildfire erosion better

08 Dec 2014 - Jon Pelletier and his graduate student Caitlin Orem's research on the post Las Conchas fire erosion was highlighed in the Arizona Daily Star...

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2014 CZOData Cyber-Seminar Spring Series

06 Mar 2014 - Presentations describing the Integrated CZO Data system and how to use it; for interested CZO investigators, students & staff.


Critical Zone Profile - CHRISTOPHER SHEPARD (soil researcher, PhD student)

17 Mar 2015 - PhD Student; Soil, Water, and Environmental Science; University of Arizona.

Critical Zone Profile - JENNIFER MCINTOSH (hydrobiogeochemist, associate professor)

17 Mar 2015 - Associate Professor, Hydrology and Water Resources, University of Arizona.

Critical Zone Profile - KYLE TROSTLE (geochemist, postdoctoral researcher)

13 Mar 2015 - Postdoctoral Researcher; Soil, Water, and Environmental Science; University of Arizona.

Critical Zone Profile - XAVIER ZAPATA-RIOS (hydrologist, PhD student)

13 Mar 2015 - PhD Student, Hydrology and Water Resources, University of Arizona.

Critical Zone Profile - RACHEL GALLERY (microbial biologist, assistant professor)

13 Mar 2015 - Assistant Professor, School of Natural Resources and the Environment, University of Arizona.

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Events

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Publications

FEATURED NATIONALLY

Chapter 2 – The Role of Critical Zone Observatories in Critical Zone Science. White T., Brantley S., Banwart S., Chorover J., Dietrich W., Derry L., Lohse K., Anderson S., Aufdendkampe A., Bales R., Kumar P., Richter D., McDowell B. (2015): Developments in Earth Surface Processes 19: 15–78 Cross-CZO National

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Chapter 6 – Soil Geochemistry in the Critical Zone: Influence on Atmosphere, Surface- and Groundwater Composition. Perdrial J., Thompson A., Chorover J. (2015): Developments in Earth Surface Processes 19: 173–201 Cross-CZO

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Chapter 8 – Ecohydrology and the Critical Zone: Processes and Patterns Across Scales. Moore G., McGuire K., Troch P., Barron-Gafford G. (2015): Developments in Earth Surface Processes 19: 239-266

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Mineral nutrient mobilization by plants from rock: influence of rock type and arbuscular mycorrhiza. Burghelea C., Zaharescu D.G., Dontsova K., Maier R., Huxman T., Chorover J. (2015): Biogeochemistry 124(1-3): 187-203

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Laser vision: lidar as a transformative tool to advance critical zone science. Harpold, A. A., Marshall, J. A., Lyon, S. W., Barnhart, T. B., Fisher, B. A., Donovan, M., Brubaker, K. M., Crosby, C. J., Glenn, N. F., Glennie, C. L., Kirchner, P. B., Lam, N., Mankoff, K. D., McCreight, J. L., Molotch, N. P., Musselman, K. N., Pelletier, J., Russo, T., Sangireddy, H., Sjöberg, Y., Swetnam, T., and West, N. (2015): Hydrol. Earth Syst. Sci., 19, 2881-2897 Cross-CZO National

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Consequences of mixing assumptions for time-variable travel time distributions. van der Velde Y., Heidbüchel I., Lyon S.W., Nyberg L., Rodhe A., Bishop K. and Troch P.A. (2015): Hydrological Processes 29(16): 3460–3474

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Climatic and landscape influences on soil moisture are primary determinants of soil carbon fluxes in seasonally snow-covered forest ecosystems. Stielstra C.M., Lohse K.A., Chorover J., McIntosh J.C., Barron-Gafford G.A., Perdrial J.N., Litvak M., Barnard H.R., Brooks P.D. (2015): Biogeochemistry 123(3): 447–465 Cross-CZO

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Quantifying the time scale of elevated geomorphic response following wildfires using multi-temporal LiDAR data: An example from the Las Conchas fire, Jemez Mountains, New Mexico. Orem C.A. and Pelletier J.D. (2015): Geomorphology 232: 224–238

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Quantifying the effects of vegetation structure on snow accumulation and ablation in mixed-conifer forests. Broxton P. D., Harpold A. A., Biederman J. A., Troch P. A., Molotch N. P., and Brooks P. D. (2015): Ecohydrology (online) Cross-CZO

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Soil moisture response to snowmelt timing in mixed-conifer subalpine forests. Harpold A. A., Molotch N. P., Musselman K. N., Bales R. C., Kirchner P. B., Litvak M. and Brooks P. D. (2015): Hydrological Processes 29(12): 2782–2798 Cross-CZO

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Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services. Field J.P., Breshears D.D., Law D.J., Villegas J.C., López-Hoffman L., Brooks P.D., Chorover J., Barron-Gafford G.A., Gallery R.E., Litvak M.E., Lybrand R.A., McIntosh J.C., Meixner T., Niu G-Y., Papuga S.A., Pelletier J.D., Rasmussen C.R., and Troch P.A (2015): Vadose Zone Journal 14(1)

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Sunlight and soil-litter mixing: drivers of litter decomposition in drylands. Barnes P.W., Throop H.L., Archer S.R., Breshears D.D., McCulley R.L., and Tobler M.A. (2015): Progress in Botany 76: 273-302

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Rare Earth Elements as Reactive Tracers of Biogeochemical Weathering in Forested Rhyolitic Terrain. Vázquez-Ortega A., Perdrial J., Harpold A., Zapata-Ríos X., Rasmussen C., McIntosh J., Schaap M., Pelletier J.D., Brooks P.D., Amistadi M.K., Chorover J. (2015): Chemical Geology 391: 19-32 Cross-CZO

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Fractionation of Dissolved Organic Matter by (Oxy)Hydroxide-Coated Sands: Competitive Sorbate Displacement during Reactive Transport. Vazquez-Ortega A., Hernandez-Ruiz S., Amistadi M.K., Rasmussen C., Chorover J. (2014): Vadose Zone Journal 13(7):

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Progress on relationships between horizontal and vertical dust flux: Mathematical, empirical and risk-based perspectives. Whicker J.J., Breshears D.D. and Field J.P. (2014): Aeolian Research 14: 105-111

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A Cross-scale Study of Feldspar Transformation in the Santa Catalina Mountain Critical Zone Observatory. Lybrand R.A. and Rasmussen C (2014): Procedia Earth and Planetary Science 10: 63–68

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Impact of organic carbon on weathering and chemical denudation of granular basalt. Dontsova K., Zaharescu D., Henderson W., Verghese S., Perdrial N., Hunt E., and Chorover J. (2014): Geochimica et Cosmochimica Acta 139: 508-526

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Estimating individual tree mid- and understory rank-size distributions from airborne laser scanning in semi-arid forests. Swetnam T.L., Falk D.A., Lynch A.M., and Yool S.R. (2014): Forest Ecology and Management 330: 271-282

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Application of Metabolic Scaling Theory to reduce error in local maxima tree segmentation from aerial LiDAR. Swetnam T.L. and Falk D.A. (2014): Forest Ecology and Management 323: 158–167

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Linking soil element-mass-transfer to microscale mineral weathering across a semiarid environmental gradient. Lybrand R.A. and Rasmussen C (2014): Chemical Geology 381: 26-39

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What makes Darwinian hydrology "Darwinian"? Asking a different kind of question about landscapes. Harman C. and Troch P.A. (2014): Hydrology and Earth System Sciences 18: 417-433 Cross-CZO

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Spatial patterns of vegetation, soils and microtopography from terrestrial laser scanning on two semi-arid hillslopes of contrasting lithology. Harman C.J., Lohse K.A., Troch P.A., Sivapalan M. (2014): Journal of Geophysical Research: Biogeosciences 119(2): 163-180 Cross-CZO

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Stream water carbon controls in seasonally snow-covered mountain catchments: impact of inter-annual variability of water fluxes, catchment aspect and seasonal processes. Perdrial J.N., McIntosh J., Harpold A., Brooks P.D., Zapata-Rios X., Ray J., Meixner T., Kanduc T., Litvak M., Troch P.A., Chorover J. (2014): Biogeochemistry 118(1-3): 273-290 Cross-CZO

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Bacterial composition of soils in ponderosa pine and mixed conifer forests exposed to different wildfire burn severity. Weber C.F., Lockhart J.S., Charaska E., Aho K., Lohse K.A. (2014): Soil Biology and Biochemistry 69: 242-250

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Influence of snow cover duration on soil evaporation and respiration efflux in mixed-conifer ecosystems. Nelson K., Kurc S.A., John G., Minor R. and Barron-Gafford G.A. (2014): Ecohydrology 7(2): 869–880

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LiDAR-derived snowpack data sets from mixed conifer forests across the Western United States. Harpold, A.A., Q. Guo, N. Molotch, P. D. Brooks, R. Bales, J.C. Fernandez-Diaz, K.N. Musselman, and T.L. Swetnam, P. Kirchner, M. Meadows, J. Flanagan, R. Lucas (2014): Water Resources Research 50(3): 2749-2755 Cross-CZO

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Changes in snow accumulation and ablation following the Las Conchas Forest Fire, New Mexico, USA. Harpold A.A., Biederman J.A., Condon K., Merino M., Korgaonkar Y., Nan T., Sloat L.L., Ross M. and Brooks P.D. (2014): Ecohydrology 7(2): 440–452 Cross-CZO

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Separating physical and meteorological controls of variable transit times in zero-order catchments. Heidbüchel I., Troch P.A., Lyon S.W. (2013): Water Resources Research 49 (11): 7644–7657

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Coevolution of nonlinear trends in vegetation, soils, and topography with elevation and slope aspect: A case study in the sky islands of southern Arizona. Pelletier J.D., Barron-Gafford G.A., Breshears D.D., Brooks P.D., Chorover J., Durcik M., Harman C.J., Huxman T.E., Lohse K.A., Lybrand R., Meixner T., McIntosh J.C., Papuga S.A., Rasmussen C., Schaap M., Swetnam T.L., and Troch P.A. (2013): Journal of Geophysical Research: Earth Surface 118(2): 741-758

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The master transit time distribution of variable flow systems. Heidbüchel I., Troch P.A., Lyon S.W., and Weiler M. (2012): Water Resources Research 48(6): W06520

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Thermodynamic constraints on effective energy and mass transfer and catchment function. Rasmussen C. (2012): Hydrology and Earth System Sciences 16(3): 725-739,


Quantifying Topographic and Vegetation Effects on the Transfer of Energy and Mass to the Critical Zone. Rasmussen C., Pelletier J.D., Troch P.A., Swetnam T.L., and Chorover J. (2015): Vadose Zone Journal (online)

The Landscape Evolution Observatory: A large-scale controllable infrastructure to study coupled Earth-surface processes. Pangle L.A., DeLong S.B., Abramson N., Adams J., Barron-Gafford G.A., Breshears D.D., Brooks P.D., Chorover J., Dietrich W.E., Dontsova K., Durcik M., Espeleta J., Ferre T.P.A., Ferriere R., Henderson W., Hunt E.A., Huxman T.E., Millar D., Murphy B., Niu G-Y., Pavao-Zuckerman M., Pelletier J.D., Rasmussen C., Ruiz J., Saleska S., Schaap M., Sibayan M., Troch P.A., Tuller M., van Haren J., Zeng X. (2015): Geomorphology 244: 190-203 Cross-CZO

Assessing five evolving microbial enzyme models against field measurements from a semiarid savannah—What are the mechanisms of soil respiration pulses?. Zhang X., Niu G.-Y., Elshall A.S., Ye M., Barron-Gafford G.A., and Pavao-Zuckerman M. (2014): Geophysical Research Letters 41(18): 6428–6434

Development of topographic asymmetry: Insights from dated cinder cones in the western United States. McGuire L.A., Pelletier J.D., and Roering J.J. (2014): Journal of Geophysical Research 119(8): 1725–1750

Factoring in canopy cover heterogeneity on evapotranspiration partitioning: Beyond big-leaf surface homogeneity assumptions. Villegas J.C., Espeleta J.E., Morrison C.T., Breshears D.D., and Huxman T.E. (2014): Journal of Soil and Water Conservation 69(3): 78A-83A

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